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2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037 2038 2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052 2053 2054 2055 2056 2057 2058 2059 2060 2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111 2112 2113 2114 2115 2116 2117 2118 2119 2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135 2136 2137 2138 2139 2140 2141 2142 2143 2144 2145 2146 2147 2148 2149 2150 2151 2152 2153 2154 2155 2156 2157 2158 2159 2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206 2207 2208 | """ A module that provides VPython like capabilities. For more
details about VPython, refer the official website.
VPython : http://www.vpython.org/index.html
The API is based on VPython, but instead of using OpenGL and other C
libraries, this is based completly on TVTK, and Traits and Numpy.
All of the demos are also translated from VPython examples.
The implementation is done using object oriented design, and each
visualization capability is implemented as a seperate traits class.
The attributes of each class could be independently edited.
The API is kept as similar to VPython as much as possible.
This module offers the following classes :
Display actors
sphere, cylinder, cone, box, arrow, curve, ring, helix, ellipsoid
Functionality classes
frame, vector, animator
Utility functions
iterator, remove_actor, show
To see examples of classes and functions look at the `test_*`
functions at the end of this file. Here is a quick example
demonstrating how to use visual.
Note: To provide threading support for WXWidgets which are essential
for all GUI fucntionalities in visual, the visual module should be
interactively used in ipython only when wthread mode is
enabled. visual will not work properly in an interactive mode in
vanilla python interpretor.
::
$ ipython -wthread
In [1]: from tvtk.tools import visual
In [2]: visual.test_sphere()
In [3]: s = visual.sphere() # Create a sphere actor
In [4]: s.edit_traits() # Edit sphere actor's properties via GUI
"""
# Author: Raashid Baig <raashid@aero.iitb.ac.in>
# Prabhu Ramachandran <prabhu_r@users.sf.net>
#
# License: BSD Style.
# Version: 1.0
# Year : 2007
# Standard library imports.
import sys
import numpy
import time
from math import sin, cos, pi, sqrt, acos, asin
from vtk.util import colors as color
# Enthought library imports.
from traits.api import HasTraits, Trait, Instance, Tuple, Int, \
Float, Range, Button, Array, Color, Bool, Any, List, Enum
from traitsui.api import View, Item, Group, RGBColorEditor, RangeEditor
from traitsui.message import message
from tvtk.api import tvtk
from tvtk.tools import ivtk
from pyface.api import GUI
from pyface.timer.api import Timer
from tvtk.tvtk_base import TVTKBase, vtk_color_trait
# Set the global variable to None, for it's future use in function
# get_viewer()
_viewer = None
#################################################################
################ Utility function ####################
#################################################################
def _create_viewer():
"""Creates and retunrs the ivtk viewer to get_viewer() function"""
v = ivtk.viewer(browser = False)
v.scene.background = (0,0,0)
GUI.process_events()
return v
def set_viewer(viewer):
"""Set the global viewer. Handy if you need to use visual from your
own viewer. Pass an object that has a `scene` trait containing a
tvtk scene instance.
"""
global _viewer
_viewer = viewer
def get_viewer():
""" Creates and returns an ivtk viewer. If the fuction is called
1st time than creates and returns the viewer, otherwise the
originally created viewer itself is returned. Checking is done
through the global variable _viewer.
"""
global _viewer
if _viewer is None:
# If no viewer has been created till this point in program
# _create_viewer() is called and a new ivtk viewer is created
_viewer = _create_viewer()
else:
try:
_viewer.scene.render()
except:
# If the original ivtk window is destroyed when function
# is called more than once an exception is raised so that
# a new ivtk browser is created and returned.
_viewer = _create_viewer()
return _viewer
def show_actor(*tvtk_actors):
""" Gets an ivtk viewer from the function get_viewer() and adds
all the actors given, to the ivtk scene.
"""
v = get_viewer()
v.scene.add_actors(tvtk_actors)
v.scene.reset_zoom()
def remove_actor(*tvtk_actors):
""" Gets the ivtk viewer from the function get_viewer() and
removes all the actors given, from the ivtk scene."""
v = get_viewer()
for x in tvtk_actors:
v.scene.remove_actors(x.actor)
v.scene.reset_zoom()
def show():
"""This function has to be called at the end in a stand alone
visual program. Note - Don't call this function when running
visual from ipython iterpretor in an interactive mode
"""
if '-wthread' in sys.argv:
pass
else:
gui = GUI()
gui.start_event_loop()
def iterate(millisec, callable, *args, **kwargs):
"""Creates an instance of utility class Animator and returns it,
used for programs with animations, see examples for demonstration
"""
return Animator(millisec, callable, *args, **kwargs)
def translate(old, new, points):
"""Translate function takes 3 arguments the old position, new
position and the points. The function translates all the points to
the new position and returns the new points"""
diff = new - old
points[:] = points + diff
return points
def translate_points(diff, points):
"""Translate function takes 2 arguments the with which the points
are required to be translated and the points. The function
translates all the points to the new position and returns the new
points"""
points[:] = points + diff
return points
def _create_rotation_matrix(axis, angle):
"""Create a rotation matrix given an axis and an angle (in
degrees) to rotate by.
"""
axis = numpy.asarray(axis, dtype = float)
axis /= sqrt(numpy.inner(axis, axis)) #Normalizing the axis
x = axis[0]
y = axis[1]
z = axis[2]
t = angle*pi/180
cost = cos(t)
sint = sin(t)
rotator = numpy.zeros((3,3), float)
rotator[0][0] = cost + (1-cost)*(x*x)
rotator[0][1] = (1-cost)*x*y - (sint)*z
rotator[0][2] = (1-cost)*x*z + (sint)*y
rotator[1][0] = (1-cost)*y*x + (sint)*z
rotator[1][1] = cost + (1-cost)*(y*y)
rotator[1][2] = (1-cost)*y*z - (sint)*x
rotator[2][0] = (1-cost)*z*x - (sint)*y
rotator[2][1] = (1-cost)*z*y + (sint)*x
rotator[2][2] = cost + (1-cost)*(z*z)
return rotator
def axis_changed(old, new, pos, points):
"""The function takes 4 arguments, the old and the new axis, the
position and points. All arguments should be given as a numpy
array, The first 3 can also be given in form of a tuple. The
function rotates all the points so that they become aligned with
the new axis"""
# Creating a working normalized copy of old axis
o = old/float(sqrt(numpy.inner(old, old)))
# Creating a working normalized copy of new axis
n = new/sqrt(numpy.inner(new, new))
dpdt = numpy.dot(o, n)
if abs(abs(dpdt) - 1.0) < 1e-10:
if dpdt < 0:
#This is a must in the case when the new and the old axis are
#opposite to each other
diff = -pos
points = translate_points(diff, points)
#Flipping the points to reverse the axis
points[:] = -points
diff = pos
points = translate_points(diff, points)
return points
else:
#This is useful in the case when the new and the old axis are
#very close to each other
return points
alpha = acos(dpdt)# Calculating angle between the old & new axis
raxis = numpy.cross(o, n)# Calculating the axis about which to rotate
#Creating the rotation multiplication matrix
data = _create_rotation_matrix(raxis, 180.0*alpha/pi)
if (numpy.allclose(pos, 0.0)):
points[:] = numpy.dot(points, data.T)
return points
else:
diff = -pos
points = translate_points(diff, points)
points[:] = numpy.dot(points, data.T)
diff = pos
points = translate_points(diff, points)
return points
def rotate(axis, angle, origin, pos, points, maxis):
"""Rotate function takes 6 arguments the axis about which the
actor has to be rotated, the angle with which the actor has to be
rotated, the point (origin) about which actor has to be rotated
and posistion, points and current axis of the actor. The function
returns the new position, points and axis of the actor after the
rotation."""
data = _create_rotation_matrix(axis, angle)
if (numpy.allclose(pos, 0.0) and numpy.allclose(origin, 0.0)):
points[:] = numpy.dot(points, data.T)
raxis = numpy.dot(maxis, data.T)
return pos, points, raxis
else:
diff = (-1*origin[0], -1*origin[1], -1*origin[2])
pos = pos - origin
points = translate_points(diff, points)
points[:] = numpy.dot(points, data.T)
pos = numpy.dot(pos, data.T)
diff = (origin[0], origin[1], origin[2])
points = translate_points(diff, points)
pos = pos + origin
raxis = numpy.dot(maxis, data.T)
return pos, points, raxis
def rotate_single_point(axis, angle, origin, pos, maxis):
"""Rotate function takes 5 arguments the axis about which the
actor has to be rotated, the angle with which the actor has to be
rotated, the point (origin) about which actor has to be rotated
and posistion, and current axis of the actor. The function returns
the new position and new axis of the actor after the rotation."""
axis = numpy.asarray(axis, dtype = float)
data = _create_rotation_matrix(axis, angle)
if (numpy.allclose(pos, 0.0)):
raxis = numpy.dot(maxis, data.T)
return pos, raxis
else:
pos = pos - origin
pos = numpy.dot(pos, data.T)
pos = pos + origin
raxis = pos/sqrt(numpy.inner(pos, pos))
return pos, raxis
def scale(scale_factor, points, pos):
"""Scale function takes 2 arguments the scaling_factor in a form
of list, or a tuple giving the scale factor for x,y and z
axis. The function returns the new points ofthe actor after
scaling"""
#Creating the scaling multiplication matrix
sc = numpy.asarray(scale_factor, dtype=float)
data = numpy.diag(sc)
if (numpy.allclose(pos, 0.0)):
points[:] = numpy.dot(points, data.T)
return points
else:
diff = (-1*pos[0], -1*pos[1], -1*pos[2])
points = translate_points(diff, points)
points[:] = numpy.dot(points, data.T)
diff = (pos[0], pos[1], pos[2])
points = translate_points(diff, points)
return points
#################################################################
####################### Functionality classes ###################
#################################################################
class VTimer(Timer):
def __init__(self, millisecs, callable, *args, **kw_args):
#Initializing the init method of parent class Timer
Timer.__init__(self, millisecs, callable, *args, **kw_args)
self.viewer = get_viewer()
self.viewer.on_trait_change(self._close, 'closing')
def _close(self):
self.Stop()
print "Stopping iterations since the viewer has been closed."
def Notify(self):
"""Overridden to call the given callable.
"""
try:
self.callable(*self.args, **self.kw_args)
except StopIteration:
self.Stop()
except:
self.Stop()
raise
class Animator(HasTraits):
#####################################################################
# Traits definitions
start_animation = Button('Start Animation')
stop_animation = Button('Stop Animation')
time_period = Range(1, 100000, 100,
desc='Specifies frequency with which timer is called')
itimer = Instance(VTimer)
######################################################################
# User interface view
event_group = Group(Item('start_animation', style = 'simple'),
Item('_'),
Item('stop_animation', style = 'simple'),
Item('_'),
show_labels = False,)
traits_view = View(event_group,
Item(name = 'time_period'),
title = 'Animation Controler', buttons = ['OK'], width = 250)
######################################################################
# Initialize object
def __init__(self, millisec, callable, *args, **kwargs):
self.time_period = millisec
self.itimer = VTimer(millisec, callable, *args, **kwargs)
######################################################################
# Non-public methods, Event handlers
def _start_animation_fired(self):
self.itimer.Start()
def _stop_animation_fired(self):
self.itimer.Stop()
def _time_period_changed(self, value):
t = self.itimer
if t is None:
return
t.millisec = value
if t.IsRunning():
t.Stop()
t.Start(value)
class MVector(numpy.ndarray):
"""MVector class gives many of the functionalities given by Vector
of VPython"""
def __new__(subtype, x = 0.0, y = 0.0, z = 0.0):
data = numpy.array((x, y, z), float)
ret = numpy.ndarray.__new__(subtype, shape = (3,),
buffer = data, dtype=float,
order = False)
return ret.copy()
def _get_x(self):
return self[0]
def _set_x(self, val):
self[0] = val
x = property(_get_x, _set_x)
def _get_y(self):
return self[1]
def _set_y(self, val):
self[1] = val
y = property(_get_y, _set_y)
def _get_z(self):
return self[2]
def _set_z(self, val):
self[2] = val
z = property(_get_z, _set_z)
def dot(vec1, vec2):
""" Function performs the dot vector multiplication of 2
vector instances and returning a new vector instance equal to
the dot product of given vectors"""
i = vec1.x * vec2.x
j = vec1.y * vec2.y
k = vec1.z * vec2.z
dot = i + j + k
return dot
def cross(vec1, vec2):
""" Function performing the cross vector multiplication of 2
vector instances and returning a new vector instance equal to
the cross product of given vectors"""
i = (vec1.y*vec2.z - vec1.z*vec2.y)
j = (vec1.z*vec2.x - vec1.x*vec2.z)
k = (vec1.x*vec2.y - vec1.y*vec2.x)
cross = MVector(i, j, k)
return cross
def mag(vec):
""" Function computes and returns the magnitude of a vector"""
mag = sqrt(vec[0]**2 + vec[1]**2 + vec[2]**2)
return mag
def norm(vec):
""" Function computes and returns the normalized form of a
given vector"""
norm = vec/sqrt(numpy.inner(vec, vec))
return norm
class Frame(HasTraits):
"""Frame groups together all the actors given to it into a single
unit, so that they can be manipulated as a combined entity."""
#####################################################################
# Traits definitions
axis = Array(value = (1.0, 0.0, 0.0), desc = 'the frame axis')
x = Range(-1e299, 1e299, 0.0, desc = 'the X coordinate of frame objects')
y = Range(-1e299, 1e299, 0.0, desc = 'the Y coordinate of frame objects')
z = Range(-1e299, 1e299, 0.0, desc = 'the Z coordinate of frame objects')
pos = Array(value = (0.0, 0.0, 0.0), desc = 'the frame pos')
objects = List
visibility = Bool(True)
viewer = Any
######################################################################
# User interface view
traits_view = View(Group(Item(name = 'x', label = 'Pos X'),
Item(name = 'y', label = 'Pos Y'),
Item(name = 'z', label = 'Pos Z'),
Item(name = 'visibility'),
label = 'Frame Properties',
show_border = True),
buttons=['OK'],
)
def __init__(self, *arguments, **traits):
self.arg = list(arguments)
HasTraits.__init__(self, **traits)
self.keys = traits.keys()
self._pos_changed(numpy.array([0.0, 0.0, 0.0]), self.pos)
self._x_changed(0.0, self.x)
self._y_changed(0.0, self.y)
self._z_changed(0.0, self.z)
#self._axis_changed(numpy.array([1.0, 0.0, 0.0]), self.axis)
######################################################################
# Non-public methods, Event handlers
def _pos_changed(self, old, new):
diff = new - old
for a in self.arg:
a.pos = a.pos + diff
def _x_changed(self, old, new):
diff = new - old
for a in self.arg:
a.x = a.x + diff
def _y_changed(self, old, new):
diff = new - old
for a in self.arg:
a.y = a.y + diff
def _z_changed(self, old, new):
diff = new - old
for a in self.arg:
a.z = a.z + diff
def _axis_changed(self, old, new):
if (numpy.allclose(old, new)):
pass
else:
o = old/sqrt(numpy.inner(old, old))
n = new/sqrt(numpy.inner(new, new))
raxis = numpy.cross(o, n)
# raxis is the axis about which the rotation of th objects
# will be performed so that they have the new axis
alpha = acos(numpy.dot(o, n))
# alpha is the angle between the old and the new axis
alpha = 180.0*alpha/pi
for a in self.arg:
a.rotate(alpha, raxis, self.pos)
def _visibility_changed(self, value):
val = int(value)
if (val == 1):
for a in self.arg:
a.actor.visibility = 1
else:
for a in self.arg:
a.actor.visibility = 0
######################################################################
# Object's public methods
def rotate(self, angle, axis, origin = numpy.array([0.0, 0.0, 0.0])):
for a in self.arg:
a.rotate(angle, axis, origin)
pts = numpy.array([1.0, 0.0, 0.0])#junk points passed as arguments
pos, pts, faxis = rotate(axis, angle, origin, self.pos, pts, self.axis)
self.set(pos=pos, axis = faxis, trait_change_notify = False)
###################################################################
###################### Actor Classes ##############################
###################################################################
class Curve(HasTraits):
"""Curve class creates a polydata source using point and
connectivity arrays given by the user, which inturn is used to
create a polydata actor"""
#####################################################################
# Traits definitions
points = Trait(None, None, Array('d', shape=(None,3)), desc='the points of the curve')
pos = Array(value = (0.0, 0.0, 0.0), desc = 'the curve pos')
radius = Range(0.0, 1.0e299, value = 0.01, desc = 'the radius of curve tube')
axis = Array(value = (1.0, 0.0, 0.0), desc = 'the curve axis')
x = Range(-1e299, 1e299, 0.0, desc = 'the X coordinate of curve')
y = Range(-1e299, 1e299, 0.0, desc = 'the Y coordinate of curve')
z = Range(-1e299, 1e299, 0.0, desc = 'the Z coordinate of curve')
color = vtk_color_trait((1.0, 1.0, 1.0))
representation = Enum('s', 'w', 'p')
visibility = Bool(True)
polydata = Instance(tvtk.PolyData, args=())
property = Instance(tvtk.Property)
stripper = Instance(tvtk.Stripper, args=())
tube = Instance(tvtk.TubeFilter, args=())
actor = Instance(tvtk.Actor, args=()) # tvtk Actor, for the usual pipeline architecture.
viewer = Any
######################################################################
# User interface view
traits_view = View(Group(Item(name = 'color'),
Item(name = 'visibility'),
Item(name = 'radius'),
Item(name = 'x', label = 'Pos X'),
Item(name = 'y', label = 'Pos Y'),
Item(name = 'z', label = 'Pos Z'),
Item(name = 'representation'),
label = 'Curve Properties',
show_border = True),
buttons=['OK'],
)
def __init__(self, **traits):
self.property = self.actor.property
HasTraits.__init__(self, **traits)
self._points_changed(self.points)
self._color_changed(self.color)
self._visibility_changed(self.visibility)
self._radius_changed(self.radius)
self._axis_changed(numpy.array((1.0, 0.0, 0.0)), self.axis)
self.stripper.input = self.polydata
self.tube.input = self.stripper.output
self.tube.number_of_sides = 4
self.tube.capping = 1
m = tvtk.PolyDataMapper()
m.input = self.tube.output
self.actor.mapper = m
self.property = self.actor.property
self.property.representation = self.representation
show_actor(self.actor)
self.viewer = get_viewer()
self.property.on_trait_change(self.viewer.scene.render)
self.actor.on_trait_change(self.viewer.scene.render)
self.tube.on_trait_change(self.viewer.scene.render)
######################################################################
# Object's public methods
def append(self, pnt):
"""Function appeneds new points given as arguments to the
current points"""
self.extend([pnt])
def extend(self, pts):
if self.points is None:
p = pts
else:
n = self.points.shape[0]
p = numpy.resize(self.points, (n+len(pts), 3))
p[:n] = self.points
p[n:] = pts
self.points = p
self.update()
def update(self):
self.polydata.modified()
self.viewer.scene.render()
def rotate(self, angle, axis, origin = numpy.array([0.0, 0.0, 0.0])):
"""Function takes atleast 2 arguments: axis about which to
rotate the actor and angle with which to rotate the actor, the
3rd agrument is origin i.e. the point about which to rotate
the actor, by default it is set to the global origin"""
p, pi, ax = rotate(axis, angle, origin, self.pos, self.points, numpy.array([0.0, 0.0, 0.0]))
self.set(pos = p, trait_change_notify = False)
self.set(points = pi, trait_change_notify = False)
self.set(axis = ax, trait_change_notify = False)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def render(self):
"""Function redraws/refreshs the ivtk viewer's scene"""
v = self.viewer
if v is not None:
v.scene.render()
######################################################################
# Non-public methods, Event handlers
def _points_changed(self, value):
self.polydata.points = value
if value is None:
np = 0
lines = None
else:
np = len(self.points) - 1
lines = numpy.zeros((np, 2), 'l')
lines[:,0] = numpy.arange(0, np-0.5, 1, 'l')
lines[:,1] = numpy.arange(1, np+0.5, 1, 'l')
self.polydata.lines = lines
v = self.viewer
if v is not None:
v.scene.render()
def _x_changed(self, value):
self.x = value
self.pos = (self.x, self.pos[1],self.pos[2])
def _y_changed(self, value):
self.y = value
self.pos = (self.pos[0], self.y, self.pos[2])
def _z_changed(self, value):
self.z = value
self.pos = (self.pos[0], self.pos[1], self.z)
def _pos_changed(self, old, new):
self.set(x = new[0], trait_change_notify = False)
self.set(y = new[1], trait_change_notify = False)
self.set(z = new[2], trait_change_notify = False)
p = translate(old, new, self.points)
self.set(points = p, trait_change_notify = False)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _axis_changed(self, old, new):
self.points = axis_changed(old, new, self.pos, self.points)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _color_changed(self, value):
self.actor.property.color = value
def _radius_changed(self, value):
self.tube.radius = self.radius
def _representation_changed(self, value):
self.property.representation = self.representation
self.property.modified()
self.render()
def _visibility_changed(self, value):
val = int(value)
if (val == 1):
self.actor.visibility = 1
else:
self.actor.visibility = 0
class Ring(HasTraits):
"""Ring class creates a Ring form tvtk polydata, follows
the usual VTK pipeline and creates a ring actor."""
#####################################################################
# Traits definitions
points = Array('d', shape = (360,3))
radius = Range(-1e299, 1e299, value = 0.5, desc = 'the ring radius')
pos = Array(value = (0.0, 0.0, 0.0), desc = 'the ring pos')
axis = Array(value = (1.0, 0.0, 0.0), desc = 'the ring axis')
color = vtk_color_trait((1.0, 1.0, 1.0))
x = Range(-1e299, 1e299, 0.0, desc = 'the X coordinate of ring center')
y = Range(-1e299, 1e299, 0.0, desc = 'the Y coordinate of ring center')
z = Range(-1e299, 1e299, 0.0, desc = 'the Z coordinate of ring center')
representation = Enum('s', 'w', 'p')
thickness = Range(0, 1e299, value = 0.01, desc = 'the ring thickness')
visibility = Bool(True)
viewer = Any
polydata = Instance(tvtk.PolyData, ())
property = Instance(tvtk.Property)
tube = Instance(tvtk.TubeFilter, ())
actor = Instance(tvtk.Actor, ()) # tvtk Actor, for the usual pipeline architecture.
######################################################################
# User interface view
traits_view = View(Group(Item(name = 'radius'),
Item(name = 'thickness'),
Item(name = 'x', label = 'Pos X'),
Item(name = 'y', label = 'Pos Y'),
Item(name = 'z', label = 'Pos Z'),
Item(name = 'color'),
Item(name = 'visibility'),
Item(name = 'representation'),
label = 'Ring Properties',
show_border = True),
buttons=['OK'],
)
def __init__(self, **traits):
self.property = self.actor.property
HasTraits.__init__(self, **traits)
self._create_points()
self._pos_changed(numpy.array([0.0, 0.0, 0.0]), self.pos)
self._x_changed(self.x)
self._y_changed(self.y)
self._z_changed(self.z)
self._color_changed(self.color)
self._visibility_changed(self.visibility)
self._thickness_changed(self.thickness)
self._axis_changed(numpy.array((1.0, 0.0, 0.0)), self.axis)
normals = tvtk.PolyDataNormals(input = self.polydata)
self.tube.input = normals.output
self.tube.number_of_sides = 4
self.tube.capping = 1
m = tvtk.PolyDataMapper()
m.input = self.tube.output
self.actor.mapper = m
self.property = self.actor.property
self.property.representation = self.representation
show_actor(self.actor)
self.viewer = get_viewer()
self.property.on_trait_change(self.viewer.scene.render)
self.actor.on_trait_change(self.viewer.scene.render)
self.tube.on_trait_change(self.viewer.scene.render)
######################################################################
# Non-public methods, Event handlers
def _create_points(self):
for i in range(0,360,1):
theta = i*pi/180
self.points[i][0] = 0.0
self.points[i][1] = self.radius*sin(theta)
self.points[i][2] = self.radius*cos(theta)
np = len(self.points) - 1
lines = numpy.zeros((np, 2), 'l')
lines[:,0] = numpy.arange(0, np-0.5, 1, 'l')
lines[:,1] = numpy.arange(1, np+0.5, 1, 'l')
self.polydata.points = self.points
self.polydata.lines = lines
v = self.viewer
if v is not None:
v.scene.render()
def _color_changed(self, value):
self.actor.property.color = value
def _radius_changed(self, old, new):
factor = new/old
if (numpy.allclose(self.pos, 0.0)):
self.points[:] = factor*self.points[:]
self.polydata.modified()
self.render()
else:
c = self.pos
diff = (0.0, 0.0, 0.0) - c
self.points = translate_points(diff, self.points)
self.points[:] = factor*self.points[:]
diff = c
self.points = translate_points(diff, self.points)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _x_changed(self, value):
self.x = value
self.pos = (self.x, self.pos[1],self.pos[2])
def _y_changed(self, value):
self.y = value
self.pos = (self.pos[0], self.y, self.pos[2])
def _z_changed(self, value):
self.z = value
self.pos = (self.pos[0], self.pos[1], self.z)
def _pos_changed(self, old, new):
self.set(x = new[0], trait_change_notify = False)
self.set(y = new[1], trait_change_notify = False)
self.set(z = new[2], trait_change_notify = False)
self.points = translate(old, new, self.points)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _axis_changed(self, old, new):
self.points = axis_changed(old, new, self.pos, self.points)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _representation_changed(self, value):
self.property.representation = self.representation
self.property.modified()
self.render()
def _visibility_changed(self, value):
val = int(value)
if (val == 1):
self.actor.visibility = 1
else:
self.actor.visibility = 0
def _thickness_changed(self, value):
self.tube.radius = value
######################################################################
# Object's public methods
def rotate(self, angle, axis, origin = numpy.array([0.0, 0.0, 0.0])):
"""Function takes atleast 2 arguments: angle with which to
rotate the actor, and the axis about which to rotate the
actor, the 3rd agrument is origin i.e. the point about which
to rotate the actor, by default it is set to the global origin"""
p, pi, ax = rotate(axis, angle, origin, self.pos, self.points, self.axis)
self.set(pos = p, trait_change_notify = False)
self.points = pi
self.set(axis = ax, trait_change_notify = False)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def render(self):
v = self.viewer
if v is not None:
v.scene.render()
class Cone(HasTraits):
"""Cone class creates Cone from polydata obtained from tvtk
ConeSource, follows the usual VTK pipeline and creates a Cone
actor, which is passed to the show_actor() function as an
argument.
"""
#####################################################################
# Traits definitions
points = Array('d', shape = (7,3))
radius = Range(0.0, 100.0, value = 0.5, desc = 'the cone radius')
height = Range(0.0, 100.0, value = 1.0, desc = 'the cone height')
pos = Array(value = (0.0, 0.0, 0.0), desc = 'the cone pos')
axis = Array(value = (1.0, 0.0, 0.0), desc = 'the cone axis')
color = vtk_color_trait((1.0, 1.0, 1.0))
x = Range(-1e299, 1e299, 0.0, desc = 'the X coordinate of cone center')
y = Range(-1e299, 1e299, 0.0, desc = 'the Y coordinate of cone center')
z = Range(-1e299, 1e299, 0.0, desc = 'the Z coordinate of cone center')
representation = Enum('s', 'w', 'p')
visibility = Bool(True)
viewer = Any
polydata = Instance(tvtk.PolyData, ())
property = Instance(tvtk.Property)
actor = Instance(tvtk.Actor, ())
######################################################################
# User interface view
traits_view = View(Group(Item(name = 'radius'),
Item(name = 'height'),
Item(name = 'x', label = 'Pos X'),
Item(name = 'y', label = 'Pos Y'),
Item(name = 'z', label = 'Pos Z'),
Item(name = 'color'),
Item(name = 'visibility'),
Item(name = 'representation'),
label = 'Cone Properties',
show_border = True),
buttons=['OK'],
)
def __init__(self, **traits):
self.property = self.actor.property
HasTraits.__init__(self, **traits)
self._create_points(self.radius, self.height, self.pos, self.axis)
self._pos_changed(numpy.array([0.0, 0.0, 0.0]), self.pos)
self._x_changed(self.x)
self._y_changed(self.y)
self._z_changed(self.z)
self._color_changed(self.color)
m = tvtk.PolyDataMapper()
m.input = self.polydata
self.actor.mapper = m
self.property = self.actor.property
self.property.representation = self.representation
show_actor(self.actor) # passing the actors function for rendering
self.viewer = get_viewer() # getting the ivtk viewer
self.property.on_trait_change(self.viewer.scene.render)
self.actor.on_trait_change(self.viewer.scene.render)
######################################################################
# Non-public methods, Event handlers
def _create_points(self, r, h, c, d):
cs = tvtk.ConeSource(radius = r, height = h, center = tuple(c), direction = tuple(d))
cs.update()
ps = cs.output
points = ps.points.to_array()
self.points = points
self.polydata.points = self.points
self.polydata.polys = ps.polys
return points, ps.polys
def _color_changed(self, value):
self.actor.property.color = value
def _radius_changed(self):
points, lines = self._create_points(self.radius, self.height, self.pos, self.axis)
self.polydata.points = points
self.polydata.modified()
self.render()
def _height_changed(self):
points, lines = self._create_points(self.radius, self.height, self.pos, self.axis)
self.polydata.points = points
self.polydata.modified()
self.render()
def _pos_changed(self, old, new):
self.set(x = new[0], trait_change_notify = False)
self.set(y = new[1], trait_change_notify = False)
self.set(z = new[2], trait_change_notify = False)
points, lines = self._create_points(self.radius, self.height, self.pos, self.axis)
self.points = points
self.polydata.modified()
self.render()
def _axis_changed(self):
points, lines = self._create_points(self.radius, self.height, self.pos, self.axis)
self.polydata.points = points
self.polydata.modified()
self.render()
def _x_changed(self, value):
self.x = value
self.pos = (self.x, self.pos[1],self.pos[2])
def _y_changed(self, value):
self.y = value
self.pos = (self.pos[0], self.y, self.pos[2])
def _z_changed(self, value):
self.z = value
self.pos = (self.pos[0], self.pos[1], self.z)
def _representation_changed(self, value):
self.property.representation = self.representation
self.property.modified()
self.render()
def _visibility_changed(self, value):
val = int(value)
if (val == 1):
self.actor.visibility = 1
else:
self.actor.visibility = 0
######################################################################
# Object's public methods
def rotate(self, angle, axis, origin = numpy.array([0.0, 0.0, 0.0])):
"""Function takes atleast 2 arguments: axis about which to
rotate the actor and angle with which to rotate the actor, the
3rd agrument is origin i.e. the point about which to rotate
the actor, by default it is set to the global origin"""
p, pi, ax = rotate(axis, angle, origin, self.pos, self.points, self.axis)
self.set(pos = p, trait_change_notify = False)
self.points = pi
self.set(axis = ax, trait_change_notify = False)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def render(self):
v = self.viewer
if v is not None:
v.scene.render()
class Sphere(HasTraits):
"""Sphere class creates Sphere from tvtk SphereSource, follows the
usual VTK pipeline and creates a Sphere actor, which is passed to
the show_actor() function as an argument.
"""
#####################################################################
# Traits definitions
radius = Range(0.0, 1e299, value = 0.5, desc = 'the sphere radius')
pos = Array(value = (0.0, 0.0, 0.0), desc = 'the sphere pos')
axis = Array(value = (1.0, 0.0, 0.0), desc= 'the sphere axis')
color = vtk_color_trait((1.0, 1.0, 1.0))
x = Range(-1e299, 1e299, 0.0, desc = 'the X coordinate of sphere center')
y = Range(-1e299, 1e299, 0.0, desc = 'the Y coordinate of sphere center')
z = Range(-1e299, 1e299, 0.0, desc = 'the Z coordinate of sphere center')
representation = Enum('s', 'w', 'p')
visibility = Bool(True)
viewer = Any
polydata = Instance(tvtk.PolyData, ())
property = Instance(tvtk.Property)
actor = Instance(tvtk.Actor, ()) # tvtk Actor, for the usual pipeline architecture.
######################################################################
# User interface view
traits_view = View(Group(Item(name = 'radius', style = 'simple'),
Item(name = 'x', label = 'Pos X'),
Item(name = 'y', label = 'Pos Y'),
Item(name = 'z', label = 'Pos Z'),
Item(name = 'color'),
Item(name = 'visibility'),
Item(name = 'representation'),
label = 'Sphere Properties',
show_border = True),
buttons=['OK'],
)
def __init__(self, **traits):
self.property = self.actor.property
HasTraits.__init__(self, **traits)
self._create_points(self.radius, self.pos)
self._color_changed(self.color)
self._visibility_changed(self.visibility)
self._x_changed(self.x)
self._y_changed(self.y)
self._z_changed(self.z)
normals = tvtk.PolyDataNormals(input = self.polydata)
m = tvtk.PolyDataMapper(input = normals.output) # the usual vtk pipleine countinuation
self.actor.mapper = m
self.property = self.actor.property
self.property.representation = self.representation
show_actor(self.actor) # passing the actors function for rendering
self.viewer = get_viewer() # getting the ivtk viewer
self.property.on_trait_change(self.viewer.scene.render)
self.actor.on_trait_change(self.viewer.scene.render)
######################################################################
# Non-public methods, Event handlers
def _create_points(self, r, c):
sp = tvtk.SphereSource(radius = r, center = tuple(c), phi_resolution = 20, theta_resolution = 20)
sp.update()
ps = sp.output
points = ps.points.to_array()
self.points = points
self.polydata.points = self.points
self.polydata.polys = ps.polys
return points, ps.polys
def _radius_changed(self, value):
points, polys = self._create_points(self.radius, self.pos)
self.polydata.points = points
self.polydata.modified()
self.render()
def _color_changed(self, value):
self.actor.property.color = value
def _pos_changed(self, old, new):
self.set(x = new[0], trait_change_notify = False)
self.set(y = new[1], trait_change_notify = False)
self.set(z = new[2], trait_change_notify = False)
points, lines = self._create_points(self.radius, self.pos)
self.polydata.points = points
self.polydata.modified()
self.render()
def _axis_changed(self, old, new):
self.points = axis_changed(old, new, self.pos, self.points)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _x_changed(self, value):
self.x = value
self.pos = (self.x, self.pos[1],self.pos[2])
def _y_changed(self, value):
self.y = value
self.pos = (self.pos[0], self.y, self.pos[2])
def _z_changed(self, value):
self.z = value
self.pos = (self.pos[0], self.pos[1], self.z)
def _representation_changed(self, value):
self.property.representation = self.representation
self.property.modified()
self.render()
def _visibility_changed(self, value):
val = int(value)
if (val == 1):
self.actor.visibility = 1
else:
self.actor.visibility = 0
######################################################################
# Object's public methods
def render(self):
v = self.viewer
if v is not None:
v.scene.render()
def rotate(self, angle, axis, origin = numpy.array([0.0, 0.0, 0.0])):
"""Function takes atleast 2 arguments: axis about which to
rotate the actor and angle with which to rotate the actor, the
3rd agrument is origin i.e. the point about which to rotate
the actor, by default it is set to the global origin"""
p, pi, ax = rotate(axis, angle, origin, self.pos, self.points, self.axis)
self.set(pos = p, trait_change_notify = False)
self.points = pi
self.set(axis = ax, trait_change_notify = False)
self.polydata.points = self.points
self.polydata.modified()
self.render()
class Cylinder(HasTraits):
"""Cylinder class creates Cylinder from tvtk CylinderSource,
follows the usual VTK pipeline and creates a Sphere actor, which
is passed to the show_actor() function as an argument.
"""
#####################################################################
# Traits definitions
# XXX: These should really not be ranges, but positive numbers.
radius = Range(0.0, 1e299, value = 1.0, desc = 'the cylinder radius')
length = Range(0.0, 1e299, value = 1.0, desc = 'the cylinder length')
pos = Array(value = (0.0, 0.0, 0.0), desc = 'the cylinder pos')
axis = Array(value = (1.0, 0.0, 0.0), desc = 'the cylinder axis')
points = Array('d', shape = (60,3))
color = vtk_color_trait((1.0, 1.0, 1.0))
x = Range(-1e299, 1e299, 0.0, desc = 'the X coordinate of cylinder center')
y = Range(-1e299, 1e299, 0.0, desc = 'the Y coordinate of cylinder center')
z = Range(-1e299, 1e299, 0.0, desc = 'the Z coordinate of cylinder center')
representation = Enum('s', 'w', 'p')
visibility = Bool(True)
viewer = Any
polydata = Instance(tvtk.PolyData, ())
actor = Instance(tvtk.Actor, ()) # tvtk Actor, for the usual pipeline architecture.
property = Instance(tvtk.Property)
######################################################################
# User interface view
traits_view = View(Group(Item(name = 'radius', style = 'simple'),
Item(name = 'length', style = 'simple'),
Item(name = 'x', label = 'Pos X'),
Item(name = 'y', label = 'Pos Y'),
Item(name = 'z', label = 'Pos Z'),
Item(name = 'color'),
Item(name = 'visibility'),
Item(name = 'representation'),
label = 'Cylinder Properties',
show_border = True),
buttons=['OK'],
)
def __init__(self, **traits):
self.property = self.actor.property
HasTraits.__init__(self, **traits)
self._create_points(self.radius, self.pos, self.length)
self._color_changed(self.color)
self._visibility_changed(self.visibility)
self._axis_changed(numpy.array([1.0, 0.0, 0.0]), self.axis)
self._x_changed(self.x)
self._y_changed(self.y)
self._z_changed(self.z)
normals = tvtk.PolyDataNormals(input = self.polydata)
m = tvtk.PolyDataMapper(input = normals.output) # the usual vtk pipleine countinuation
self.actor.mapper = m
self.property = self.actor.property
self.property.representation = self.representation
show_actor(self.actor) # passing the actors function for rendering
self.viewer = get_viewer() # getting the ivtk viewer
self.property.on_trait_change(self.viewer.scene.render)
self.actor.on_trait_change(self.viewer.scene.render)
######################################################################
# Non-public methods, Event handlers
def _create_points(self, r, c, h):
cp = tvtk.CylinderSource(radius = r, height = h, resolution = 15)
cp.update()
ps = cp.output
points = ps.points.to_array()
l = len(points)
for i in range(0, l, 1):
points[i][1] = points[i][1] + h/2.0
points = axis_changed(numpy.array([0.0,1.0,0.0]),numpy.array([1.0,0.0,0.0]),numpy.array([0.0, 0.0, 0.0]), points)
points = translate(numpy.array([0.0, 0.0, 0.0]), self.pos, points)
self.points = points
self.polydata.points = self.points
self.polydata.polys = ps.polys
return points, ps.polys
def _radius_changed(self, old, new):
self.points, polys = self._create_points(self.radius, self.pos, self.length)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _length_changed(self, value):
self.points, polys = self._create_points(self.radius, self.pos, self.length)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _axis_changed(self, old, new):
self.points = axis_changed(old, new, self.pos, self.points)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _pos_changed(self, old, new):
self.set(x = new[0], trait_change_notify = False)
self.set(y = new[1], trait_change_notify = False)
self.set(z = new[2], trait_change_notify = False)
self.points = translate(old, new, self.points)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _color_changed(self, value):
self.actor.property.color = value
def _x_changed(self, value):
self.x = value
self.pos = (self.x, self.pos[1],self.pos[2])
def _y_changed(self, value):
self.y = value
self.pos = (self.pos[0], self.y, self.pos[2])
def _z_changed(self, value):
self.z = value
self.pos = (self.pos[0], self.pos[1], self.z)
def _representation_changed(self, value):
self.property.representation = self.representation
self.property.modified()
self.render()
def _visibility_changed(self, value):
val = int(value)
if (val == 1):
self.actor.visibility = 1
else:
self.actor.visibility = 0
######################################################################
# Object's public methods
def rotate(self, angle, axis, origin = numpy.array([0.0, 0.0, 0.0])):
"""Function takes atleast 2 arguments: axis about which to
rotate the actor and angle with which to rotate the actor, the
3rd agrument is origin i.e. the point about which to rotate
the actor, by default it is set to the global origin"""
p, pi, ax = rotate(axis, angle, origin, self.pos, self.points, self.axis)
self.set(pos = p, trait_change_notify = False)
self.points = pi
self.set(axis = ax, trait_change_notify = False)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def render(self):
v = self.viewer
if v is not None:
v.scene.render()
class Box(HasTraits):
"""Box class creates Box from tvtk CubeSource, follows the usual
VTK pipeline and creates a Cube actor, which is passed to the
show_actor() function as an argument.
"""
#####################################################################
# Traits definitions
size = Tuple((1.0, 1.0, 1.0), desc = 'the box size')
pos = Array(value = (0.0, 0.0, 0.0), desc = 'the Box pos')
color = vtk_color_trait((1.0, 1.0, 1.0))
x = Range(-1e299, 1e299, 0.0, desc = 'the X coordinate of box center')
y = Range(-1e299, 1e299, 0.0, desc = 'the Y coordinate of box center')
z = Range(-1e299, 1e299, 0.0, desc = 'the Z coordinate of box center')
representation = Enum('s', 'w', 'p')
length = Range(0, 1e299, 1.0, desc = 'the box length')
height = Range(0, 1e299, 1.0, desc = 'the box height')
width = Range(0, 1e299, 1.0, desc = 'the box width')
axis = Array(value = (1.0, 0.0, 0.0), desc = 'the box axis')
points = Array('d', shape = (24,3))
visibility = Bool(True)
viewer = Any
polydata = Instance(tvtk.PolyData, ())
actor = Instance(tvtk.Actor, ()) # tvtk Actor, for the usual pipeline architecture.
property = Instance(tvtk.Property)
######################################################################
# User interface view
traits_view = View(Group(Item(name = 'length'),
Item(name = 'height'),
Item(name = 'width'),
Item(name = 'x', label = 'Pos X'),
Item(name = 'y', label = 'Pos Y'),
Item(name = 'z', label = 'Pos Z'),
Item(name = 'color'),
Item(name = 'visibility'),
Item(name = 'representation'),
label = 'Box Properties',
show_border = True),
buttons = ['OK'],
)
def __init__(self, **traits):
self.property = self.actor.property
HasTraits.__init__(self, **traits)
self._create_points(self.size, self.pos)
self._color_changed(self.color)
self._visibility_changed(self.visibility)
self._axis_changed(numpy.array([1.0, 0.0, 0.0]), self.axis)
self._x_changed(self.x)
self._y_changed(self.y)
self._z_changed(self.z)
self._length_changed(self.length)
self._height_changed(self.height)
self._width_changed(self.width)
m = tvtk.PolyDataMapper() # the usual vtk pipleine countinuation
m.input = self.polydata
self.actor.mapper = m
self.property = self.actor.property
self.property.representation = self.representation
show_actor(self.actor) # passing the actors function for rendering
self.viewer = get_viewer() # getting the ivtk viewer
self.property.on_trait_change(self.viewer.scene.render)
self.actor.on_trait_change(self.viewer.scene.render)
######################################################################
# Non-public methods, Event handlers
def _create_points(self, s, c):
cp = tvtk.CubeSource(x_length = s[0], y_length = s[1], z_length = s[2], center = tuple(c))
cp.update()
ps = cp.output
points = ps.points.to_array()
self.points = points
self.polydata.points = self.points
self.polydata.polys = ps.polys
return points, ps.polys
def _size_changed(self, old, new):
self.set(length = new[0], trait_change_notify = False)
self.set(height = new[1], trait_change_notify = False)
self.set(width = new[2], trait_change_notify = False)
self.points, lines = self._create_points(self.size, self.pos)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _pos_changed(self, old, new):
self.set(x = new[0], trait_change_notify = False)
self.set(y = new[1], trait_change_notify = False)
self.set(z = new[2], trait_change_notify = False)
self.points = translate(old, new, self.points)
#self.connectivity.points = self.points
self.polydata.modified()
self.render()
def _axis_changed(self, old, new):
self.points = axis_changed(old, new, self.pos, self.points)
#self.connectivity.points = self.points
self.polydata.modified()
self.render()
def _color_changed(self, value):
self.actor.property.color = value
def _x_changed(self, value):
self.x = value
self.pos = (self.x, self.pos[1],self.pos[2])
def _y_changed(self, value):
self.y = value
self.pos = (self.pos[0], self.y, self.pos[2])
def _z_changed(self, value):
self.z = value
self.pos = (self.pos[0], self.pos[1], self.z)
def _representation_changed(self, value):
self.property.representation = self.representation
self.property.modified()
self.render()
def _length_changed(self, value):
self.size = (self.length, self.size[1],self.size[2])
def _height_changed(self, value):
self.size = (self.size[0], self.height, self.size[2])
def _width_changed(self, value):
self.size = (self.size[0], self.size[1], self.width)
def _visibility_changed(self, value):
val = int(value)
if (val == 1):
self.actor.visibility = 1
else:
self.actor.visibility = 0
######################################################################
# Object's public methods
def rotate(self, angle, axis, origin = numpy.array([0.0, 0.0, 0.0])):
"""Function takes atleast 2 arguments: axis about which to
rotate the actor and angle with which to rotate the actor, the
3rd agrument is origin i.e. the point about which to rotate
the actor, by default it is set to the global origin"""
p, pi, ax = rotate(axis, angle, origin, self.pos, self.points, self.axis)
self.set(pos = p, trait_change_notify = False)
self.points = pi
self.set(axis = ax, trait_change_notify = False)
#self.connectivity.points = self.points
self.polydata.modified()
self.render()
def render(self):
v = self.viewer
if v is not None:
v.scene.render()
class Arrow(HasTraits):
"""Arrow class creates Arrow from tvtk ArrowSource, follows the
usual VTK pipeline and creates a Arrow actor, which is passed to
the show_actor() function as an argument.
"""
#####################################################################
# Traits definitions
points = Array('d', shape = (31 ,3))
radius_cone = Range(0.0, 10.0, value = 0.08, desc = 'the radius of cone portion of arrow')
radius_shaft = Range(0.0, 5.0, value = 0.03, desc = 'the radius of shaft portion of arrow')
length_cone = Range(0.0, 1.0, value = 0.35, desc = 'shaft length of arrow')
axis = Array(value = (1.0, 0.0, 0.0), desc = 'the arrow axis')
color = vtk_color_trait((1.0, 1.0, 1.0))
pos = Array(value = (0.0, 0.0, 0.0), desc = 'the Arrow pos')
x = Range(-1e299, 1e299, 0.0, desc = 'the X coordinate of arrow center')
y = Range(-1e299, 1e299, 0.0, desc = 'the Y coordinate of arrow center')
z = Range(-1e299, 1e299, 0.0, desc = 'the Z coordinate of arrow center')
representation = Enum('s', 'w', 'p')
visibility = Bool(True)
viewer = Any
actor = Instance(tvtk.Actor, ()) # tvtk Actor, for the usual pipeline architecture.
property = Instance(tvtk.Property)
polydata = Instance(tvtk.PolyData, ())
######################################################################
# User interface view
traits_view = View(Group(Item(name = 'radius_cone'),
Item(name = 'length_cone'),
Item(name = 'radius_shaft'),
Item(name = 'x', label = 'Pos X'),
Item(name = 'y', label = 'Pos Y'),
Item(name = 'z', label = 'Pos Z'),
Item(name = 'color'),
Item(name = 'visibility'),
Item(name = 'representation'),
label = 'Arrow Properties',
show_border = True), buttons=['OK'])
def __init__(self, **traits):
self.property = self.actor.property
HasTraits.__init__(self, **traits)
self._create_points(self.radius_cone, self.length_cone, self.radius_shaft, self.pos)
self._color_changed(self.color)
self._visibility_changed(self.visibility)
self._pos_changed(numpy.array([0.0, 0.0, 0.0]), self.pos)
self._x_changed(self.x)
self._y_changed(self.y)
self._z_changed(self.z)
self._axis_changed(numpy.array((1.0, 0.0, 0.0)), self.axis)
normals = tvtk.PolyDataNormals(input = self.polydata)
m = tvtk.PolyDataMapper(input = normals.output) # the usual vtk pipleine countinuation
self.actor.mapper = m
self.property = self.actor.property
self.property.representation = self.representation
show_actor(self.actor) # passing the actors function for rendering
self.viewer = get_viewer() # getting the ivtk viewer
self.property.on_trait_change(self.viewer.scene.render)
self.actor.on_trait_change(self.viewer.scene.render)
######################################################################
# Non-public methods, Event handlers
def _create_points(self, rc, lc, rs, ps):
asrc = tvtk.ArrowSource(tip_radius = rc, tip_length = lc, shaft_radius = rs)
asrc.update()
ps = asrc.output
points = ps.points.to_array()
points = translate(numpy.array([0.0, 0.0, 0.0]), self.pos, points)
self.points = points
self.polydata.points = self.points
self.polydata.polys = ps.polys
return points, ps.polys
def _radius_cone_changed(self, old, new):
self.points, polys = self._create_points(self.radius_cone, self.length_cone, self.radius_shaft, self.pos)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _length_cone_changed(self, old, new):
self.points, polys = self._create_points(self.radius_cone, self.length_cone, self.radius_shaft, self.pos)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _radius_shaft_changed(self, old, new):
self.points, polys = self._create_points(self.radius_cone, self.length_cone, self.radius_shaft, self.pos)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _pos_changed(self, old, new):
self.set(x = new[0], trait_change_notify = False)
self.set(y = new[1], trait_change_notify = False)
self.set(z = new[2], trait_change_notify = False)
self.points = translate(old, new, self.points)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _axis_changed(self, old, new):
self.points = axis_changed(old, new, self.pos, self.points)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _color_changed(self, value):
self.actor.property.color = value
def _x_changed(self, value):
self.x = value
self.pos = (self.x, self.pos[1],self.pos[2])
def _y_changed(self, value):
self.y = value
self.pos = (self.pos[0], self.y, self.pos[2])
def _z_changed(self, value):
self.z = value
self.pos = (self.pos[0], self.pos[1], self.z)
def _representation_changed(self, value):
self.property.representation = self.representation
self.property.modified()
self.render()
def _visibility_changed(self, value):
val = int(value)
if (val == 1):
self.actor.visibility = 1
else:
self.actor.visibility = 0
######################################################################
# Object's public methods
def rotate(self, angle, axis, origin = numpy.array([0.0, 0.0, 0.0])):
"""Function takes atleast 2 arguments: axis about which to
rotate the actor and angle with which to rotate the actor, the
3rd agrument is origin i.e. the point about which to rotate
the actor, by default it is set to the global origin"""
p, pi, ax = rotate(axis, angle, origin, self.pos, self.points, self.axis)
self.set(pos = p, trait_change_notify = False)
self.points = pi
self.set(axis = ax, trait_change_notify = False)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def render(self):
v = self.viewer
if v is not None:
v.scene.render()
class Helix(HasTraits):
"""Helix class creates Helix/Spring from tvtk polydata, follows the
usual VTK pipeline and creates an Helix actor, which is passed to
the show_actor() function as an argument.
"""
#####################################################################
# Traits definitions
coils = Int(5)
points = Array('d', shape = (None, 3))
radius = Range(0.01, 1e299, value = 0.2, desc = 'the helix radius')
length = Range(0.01, 1e299, value = 1.0, desc = 'the helix length')
pos = Array(value = (0.0, 0.0, 0.0), desc = 'the helix position')
axis = Array(value = (1.0, 0.0, 0.0), desc = 'the helix axis')
color = vtk_color_trait((1.0, 1.0, 1.0))
x = Range(-1e299, 1e299, 0.0, desc = 'the X coordinate of helix center')
y = Range(-1e299, 1e299, 0.0, desc = 'the Y coordinate of helix center')
z = Range(-1e299, 1e299, 0.0, desc = 'the Z coordinate of helix center')
representation = Enum('s', 'w', 'p')
thickness = Range(0, 1e299, value = 0.01, desc = 'the helix thickness')
visibility = Bool(True)
viewer = Any
polydata = Instance(tvtk.PolyData, ())
property = Instance(tvtk.Property)
tube = Instance(tvtk.TubeFilter, ())
actor = Instance(tvtk.Actor, ()) # tvtk Actor, for the usual pipeline architecture.
######################################################################
# User interface view
traits_view = View(Group(Item(name = 'radius'),
Item(name = 'length'),
Item(name = 'thickness'),
Item(name = 'x', label = 'Pos X'),
Item(name = 'y', label = 'Pos Y'),
Item(name = 'z', label = 'Pos Z'),
Item(name = 'color'),
Item(name = 'visibility'),
Item(name = 'representation'),
label = 'Helix Properties',
show_border = True), buttons=['OK'])
def __init__(self, **traits):
self.property = self.actor.property
HasTraits.__init__(self, **traits)
self._create_points()
self._pos_changed(numpy.array([0.0, 0.0, 0.0]), self.pos)
self._x_changed(self.x)
self._y_changed(self.y)
self._z_changed(self.z)
self._color_changed(self.color)
self._visibility_changed(self.visibility)
self._thickness_changed(self.thickness)
self._axis_changed(numpy.array((1.0, 0.0, 0.0)), self.axis)
normals = tvtk.PolyDataNormals(input = self.polydata)
self.tube.input = normals.output
self.tube.number_of_sides = 4
self.tube.capping = 1
m = tvtk.PolyDataMapper()
m.input = self.tube.output
self.actor.mapper = m
self.property = self.actor.property
self.property.representation = self.representation
show_actor(self.actor)
self.viewer = get_viewer()
self.property.on_trait_change(self.viewer.scene.render)
self.actor.on_trait_change(self.viewer.scene.render)
self.tube.on_trait_change(self.viewer.scene.render)
######################################################################
# Non-public methods, Event handlers
def _create_points(self):
h = self.length/(self.coils*10)
cons = self.length/(self.coils*10)
j = 0
self.points.resize(self.coils*10, 3)
for i in range(0,self.coils*360,36):
theta = i*pi/180
self.points[j][0] = h
self.points[j][1] = self.radius*sin(theta)
self.points[j][2] = self.radius*cos(theta)
j = j+1
h = h + cons
np = len(self.points) - 1
lines = numpy.zeros((np, 2), 'l')
lines[:,0] = numpy.arange(0, np-0.5, 1, 'l')
lines[:,1] = numpy.arange(1, np+0.5, 1, 'l')
self.polydata.points = self.points
self.polydata.lines = lines
def _color_changed(self, value):
self.actor.property.color = value
def _radius_changed(self, old, new):
self._create_points()
self._pos_changed(numpy.array([0.0, 0.0, 0.0]), self.pos)
self.change_axis(numpy.array((1.0, 0.0, 0.0)), self.axis)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _coils_changed(self, old, new):
p = numpy.arange(self.coils*10*3, dtype = float)
p = p.reshape(self.coils*10,3)
h = self.length/(self.coils*10)
cons = self.length/(self.coils*10)
j = 0
for i in range(0,self.coils*360,36):
theta = i*pi/180
p[j][0] = h
p[j][1] = self.radius*sin(theta)
p[j][2] = self.radius*cos(theta)
j = j+1
h = h + cons
np = len(p) - 1
lines = numpy.zeros((np, 2), 'l')
lines[:,0] = numpy.arange(0, np-0.5, 1, 'l')
lines[:,1] = numpy.arange(1, np+0.5, 1, 'l')
self.polydata.points = p
self.polydata.lines = lines
self.points = p
self._pos_changed(numpy.array([0.0, 0.0, 0.0]), self.pos)
self.change_axis(numpy.array((1.0, 0.0, 0.0)), self.axis)
self.polydata.modified()
self.render()
def _x_changed(self, value):
self.x = value
self.pos = (self.x, self.pos[1],self.pos[2])
def _y_changed(self, value):
self.y = value
self.pos = (self.pos[0], self.y, self.pos[2])
def _z_changed(self, value):
self.z = value
self.pos = (self.pos[0], self.pos[1], self.z)
def _representation_changed(self, value):
self.property.representation = self.representation
self.property.modified()
self.render()
def _pos_changed(self, old, new):
self.set(x = new[0], trait_change_notify = False)
self.set(y = new[1], trait_change_notify = False)
self.set(z = new[2], trait_change_notify = False)
self.points = translate(old, new, self.points)
#self.polydata.points = self.points
self.polydata.modified()
self.render()
def _axis_changed(self, old, new):
self.points = axis_changed(old, new, self.pos, self.points)
#self.polydata.points = self.points
self.polydata.modified()
self.render()
def change_axis(self, old, new):
self.points = axis_changed(old, new, self.pos, self.points)
self.polydata.points = self.points
def _length_changed(self, old, new):
self._create_points()
v = self.viewer
if v:
v.scene.disable_render = True
self._pos_changed(numpy.array([0.0, 0.0, 0.0]), self.pos)
self.change_axis(numpy.array((1.0, 0.0, 0.0)), self.axis)
if v:
v.scene.disable_render = False
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _visibility_changed(self, value):
val = int(value)
if (val == 1):
self.actor.visibility = 1
else:
self.actor.visibility = 0
def _thickness_changed(self, value):
self.tube.radius = value
######################################################################
# Object's public methods
def rotate(self, angle, axis, origin = numpy.array([0.0, 0.0, 0.0])):
"""Function takes atleast 2 arguments: axis about which to
rotate the actor and angle with which to rotate the actor, the
3rd agrument is origin i.e. the point about which to rotate
the actor, by default it is set to the global origin"""
p, pi, ax = rotate(axis, angle, origin, self.pos, self.points, self.axis)
self.set(pos = p, trait_change_notify = False)
self.points = pi
self.set(axis = ax, trait_change_notify = False)
self.polydata.points = self.points
self.polydata.modified()
self.render()
def render(self):
v = self.viewer
if v is not None:
v.scene.render()
class Ellipsoid(HasTraits):
"""Ellipsoid class creates Ellipsoid from tvtk SphereSource by
suitably scaling it, follows the usual VTK pipeline and creates a
Ellipsoid actor, which is passed to the show_actor() function as
an argument.
"""
#####################################################################
# Traits definitions
radius = Range(0.0, 1e299, value = 0.5, desc = 'Undistorted ellipsoid radius')
pos = Array(value = (0.0, 0.0, 0.0), desc = 'Ellipsoid pos')
color = vtk_color_trait((1.0, 1.0, 1.0))
axis = Array(value = (1.0, 0.0, 0.0), desc= 'Ellipsoid axis')
size = Array(value = (1.0, 0.5, 1.0), desc= 'Ellipsoid size_factor')
length = Range(0.0, 1e299, 1.0, desc = 'Scaling factor in X direction')
height = Range(0.0, 1e299, 0.5, desc = 'Sscaling factor in Y direction')
width = Range(0.0, 1e299, 1.0, desc = 'Scaling factor in Z direction')
x = Range(-1e299, 1e299, 0.0, desc = 'X coordinate of ellipsoid center')
y = Range(-1e299, 1e299, 0.0, desc = 'Y coordinate of ellipsoid center')
z = Range(-1e299, 1e299, 0.0, desc = 'Z coordinate of ellipsoid center')
representation = Enum('s', 'w', 'p')
visibility = Bool(True)
viewer = Any
polydata = Instance(tvtk.PolyData, ())
property = Instance(tvtk.Property)
actor = Instance(tvtk.Actor, ()) # tvtk Actor, for the usual pipeline architecture.
######################################################################
# User interface view
traits_view = View(Group(Item(name = 'radius', style = 'simple'),
Item(name = 'x', label = 'Pos X'),
Item(name = 'y', label = 'Pos Y'),
Item(name = 'z', label = 'Pos Z'),
Item(name = 'length', label = 'Length'),
Item(name = 'height', label = 'Height'),
Item(name = 'width', label = 'Width'),
Item(name = 'color'),
Item(name = 'visibility'),
Item(name = 'representation'),
label = 'Ellipsoid Properties',
show_border = True), buttons=['OK'])
def __init__(self, **traits):
self.property = self.actor.property
HasTraits.__init__(self, **traits)
self._create_points(self.radius, self.pos)
self._color_changed(self.color)
self._visibility_changed(self.visibility)
self._x_changed(self.x)
self._y_changed(self.y)
self._z_changed(self.z)
self._axis_changed(numpy.array((1.0, 0.0, 0.0)), self.axis)
normals = tvtk.PolyDataNormals(input = self.polydata)
m = tvtk.PolyDataMapper(input = normals.output) # the usual vtk pipleine countinuation
self.actor.mapper = m
self.property = self.actor.property
self.property.representation = self.representation
show_actor(self.actor) # passing the actors function for rendering
self.viewer = get_viewer() # getting the ivtk viewer
self.property.on_trait_change(self.viewer.scene.render)
self.actor.on_trait_change(self.viewer.scene.render)
######################################################################
# Non-public methods, Event handlers
def _create_points(self, r, c):
sp = tvtk.SphereSource(radius = r, center = tuple(c), phi_resolution = 20, theta_resolution = 20)
sp.update()
ps = sp.output
points = ps.points.to_array()
points = scale(self.size, points, self.pos)
self.points = points
self.polydata.points = self.points
self.polydata.polys = ps.polys
return points, ps.polys
def _radius_changed(self, value):
points, polys = self._create_points(self.radius, self.pos)
self.polydata.points = points
self.polydata.modified()
self.render()
def _size_changed(self, value):
points, polys = self._create_points(self.radius, self.pos)
self.polydata.points = points
self.polydata.modified()
self.render()
def _color_changed(self, value):
self.actor.property.color = value
def _pos_changed(self, old, new):
self.set(x = new[0], trait_change_notify = False)
self.set(y = new[1], trait_change_notify = False)
self.set(z = new[2], trait_change_notify = False)
points, lines = self._create_points(self.radius, self.pos)
self.polydata.points = points
self.polydata.modified()
self.render()
def _axis_changed(self, old, new):
points = axis_changed(old, new, self.pos, self.points)
self.points = points
self.polydata.points = self.points
self.polydata.modified()
self.render()
def _x_changed(self, value):
self.x = value
self.pos = (self.x, self.pos[1],self.pos[2])
def _y_changed(self, value):
self.y = value
self.pos = (self.pos[0], self.y, self.pos[2])
def _z_changed(self, value):
self.z = value
self.pos = (self.pos[0], self.pos[1], self.z)
def _representation_changed(self, value):
self.property.representation = self.representation
self.property.modified()
self.render()
def _length_changed(self, value):
self.x_scale = value
self.size = (self.length, self.size[1], self.size[2])
def _height_changed(self, value):
self.y_scale = value
self.size = (self.size[0], self.height, self.size[2])
def _width_changed(self, value):
self.z_scale = value
self.size = (self.size[0], self.size[1], self.width)
def _visibility_changed(self, value):
val = int(value)
if (val == 1):
self.actor.visibility = 1
else:
self.actor.visibility = 0
######################################################################
# Object's public methods
def render(self):
v = self.viewer
if v is not None:
v.scene.render()
def rotate(self, angle, axis, origin = numpy.array([0.0, 0.0, 0.0])):
"""Function takes atleast 2 arguments: axis about which to
rotate the actor and angle with which to rotate the actor, the
3rd agrument is origin i.e. the point about which to rotate
the actor, by default it is set to the global origin"""
p, pi, ax = rotate(axis, angle, origin, self.pos, self.points, self.axis)
self.set(pos = p, trait_change_notify = False)
self.points = pi
self.set(axis = ax, trait_change_notify = False)
self.polydata.points = self.points
self.polydata.modified()
self.render()
###########################################################
################### Compatibility layer ###################
###########################################################
sphere = Sphere
vector = MVector
frame = Frame
curve = Curve
ring = Ring
cone = Cone
cylinder = Cylinder
box = Box
arrow = Arrow
helix = Helix
ellipsoid = Ellipsoid
mag = numpy.linalg.norm
def rate(arg):
msg = """Do not use rate, instead use the iterate() function.
Iterate should be called with a callback. This callback will be
periodically called via a timer. This will make your script's UI
completely interactive.
"""
print '*'*80
print msg
print '*'*80
############################################################
#################### Test Functions #######################
############################################################
def test_sphere():
s1 = sphere()
s2 = sphere(radius = 1.5, pos = (2, 0, 0), color = (1, 0, 0))
s2.edit_traits()
def test_box():
b1 = box()
b2 = box(center = (2, 0, 0), size = (2, 1, 1), color = (0.5, 0.5, 1.0))
b2.edit_traits()
def test_cone():
c = cone(pos = (5,0,0), color = (1,1,0), axis = (1,1,0))
c.edit_traits()
def test_cylinder():
c1 = cylinder()
c2 = cylinder(radius = 1.5, pos = (2, 0, 0), color = (1, 0, 0))
c2.edit_traits()
def test_arrow():
a = arrow()
a.edit_traits()
def test_curve():
c = curve(points = ([[0,0,0],[1,0,0],[0,1,0],[0,0,1]]))
c.edit_traits()
return c
def test_ring():
r1 = ring()
r2 = ring(radius = 1.5, pos = (2,0,0), color = (1,0,0))
r2.edit_traits()
def test_helix():
h1 = helix()
r2 = helix(radius = 0.5, pos = (2,0,0), color = (1,0,0))
r2.edit_traits()
def test_ellipsoid():
e1 = ellipsoid()
e1.edit_traits()
def test_remove_actors():
"""Test fuction for testing integrity of remove function for
actors"""
s = sphere(radius = 1.5, pos = (0, 0, 0), color = (1, 0, 0))
b = box(center = (1, 0, 0), size = (2, 1, 1), color = (0.5, 0.5, 1.0))
co = cone(resolution = 100, pos = (2, 0, 0), color = (0, 1, 0))
cy = cylinder(resolution = 100, pos = (3, 0, 0), color = (0, 0, 1))
time.sleep(3)
print "Removed sphere from scene"
remove_actor(s)
time.sleep(3)
print "Removed cone from cone"
remove_actor(co)
def test_frame():
c1 = cone(pos = (3.0, 0.0, 0.0))
r1 = ring()
f = frame(r1,c1)
f.edit_traits()
return f
def rotate_frame():
"""Test fuction for testing integrity of rotation function of
frame"""
r1 = ring(pos = (1,0,0))
h1 = helix(pos = (1,0,0))
f = frame(r1,h1)
f.pos = (2,0,0)
f.axis = (1,1,1)
j = 1
def anim():
f.rotate(j, [0.0, 1.0, 0.0])
ti = iterate(200, anim)
ti.edit_traits()
return ti
def test_rotate():
"""Test fuction for testing integrity of rotation function of
actors"""
r = ring()
r.pos = (3,0,0)
r2 = ring(pos = (3,0,0))
points1 = r2.points
r.rotate(90, [0,1,0], [1,0,0])
r.rotate(-90, [0,1,0], [1,0,0])
points2 = r.points
if (numpy.allclose(points1, points2)):
print "All clear"
else:
print "Test failed"
return r
def test_translate():
"""This is a basic examples function demonstrating the creating
simple animation from visual actors. Note the show function has
to be called in stand alone programs."""
b = box()
xlen = 10
s = sphere(pos = (xlen, 0, 0))
s.velocity = (-1,0,0)
def anim():
x = s.x
if (x < 1):
s.velocity = (1, 0, 0)
elif (x > xlen):
s.velocity = (-1, 0, 0)
s.x = x + s.velocity[0]
ti = iterate(50, anim)
ti.edit_traits()
def bounce():
"""This is a basic example function, extending the previous
example."""
xlen = 10
b1 = box(size = (1, 4, 4), color = (0,1,0))
b2 = box(size = (1, 4, 4), color = (0,1,0), pos = (xlen, 0, 0))
s = sphere(radius = 0.5, pos = (xlen, 0, 0), color = (1, 0, 0))
s.velocity = (-1, 0, 0)
def anim():
x = s.x
if (x == 1):
s.velocity = (1, 0, 0)
elif (x == (xlen-1)):
s.velocity = (-1, 0, 0)
s.x = x + s.velocity[0]
t = iterate(60, anim)
t.edit_traits()
return t
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