/usr/lib/ruby/vendor_ruby/ctioga2/graphics/elements/parametric2d.rb is in ctioga2 0.10-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 | # parametric2d.rb: a 2D curve whose parameters depend on Z values
# copyright (c) 2006, 2007, 2008, 2009, 2010 by Vincent Fourmond
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details (in the COPYING file).
require 'ctioga2/utils'
require 'ctioga2/log'
require 'Dobjects/Function'
module CTioga2
module Graphics
module Elements
# This class represents a 3D (or more, to be seen later) dataset
# as markers with various parameters parametrized (color,
# transparency, marker scale, marker type (discrete), possibly
# stroke and fill colors ?
#
# @todo Find a mechanism to really say what varies. Ideally, one
# would want to say:
# * Y2 is marker color
# * Y3 is marker size
# * Y4 only takes discrete values and represents markers
#
# However, this is complex enough to be left out of the curve
# factory, I think. Color maps can be used for colors, but for
# the rest, things will have to be implemented as parameters to
# the curve generator, or even separated commands.
class Parametric2D < PlotBasedElement
include Log
include Dobjects
# For convenience only: xy functions
attr_accessor :function
# A hash Z value -> corresponding XY functions.
attr_accessor :planes
# A ParametricPlotStyle object handling the correspondance
# between Z axis and stylistic aspects
attr_accessor :parametric_style
# Creates a new Curve2D object with the given _dataset_ and
# _style_.
def initialize(dataset, style = nil, parametric_plot_style = nil)
@dataset = dataset
@curve_style = style
@parametric_style = parametric_plot_style
prepare_data
end
# Prepares the internal storage of the data, from the @dataset
def prepare_data
@function = Function.new(@dataset.x.values.dup,
@dataset.y.values.dup)
## @todo this should eventually use Dataset::index_on_cols.
@planes = {}
@dataset.each_values do |i, x,y,*zs|
@planes[zs[0]] ||= Function.new(Dvector.new, Dvector.new)
@planes[zs[0]].x << x
@planes[zs[0]].y << y
end
@zmin = []
@zmax = []
## @todo This should rather use Z axes in the end ?
(@dataset.ys.size - 1).times do |i|
@zmin << @dataset.ys[i+1].values.min
@zmax << @dataset.ys[i+1].values.max
end
end
protected :prepare_data
# Returns the Types::Boundaries of this curve.
def get_boundaries
return Types::Boundaries.bounds(@function.x, @function.y)
end
# Draws the path lines, if applicable.
def draw_path(t)
min = @dataset.z.values.min
max = @dataset.z.values.max
if @curve_style.has_line?
# We use a default color map for the lines
@curve_style.color_map ||=
Styles::ColorMap.from_text("Red--Green")
cmap = @curve_style.color_map
for zs in @planes.keys.sort ## \todo have the sort
## direction configurable.
f = @planes[zs]
color = cmap.z_color(zs, min, max)
t.context do
@curve_style.line.set_stroke_style(t)
t.stroke_color = color
t.show_polyline(f.x, f.y)
end
end
end
end
# Draws the markers, if applicable.
def draw_markers(t)
if @curve_style.has_marker?
# We use a default color map for the markers
@curve_style.marker_color_map ||=
Styles::ColorMap.from_text("Red--Green")
@dataset.each_values do |i,x,y,*z|
ms = @parametric_style.marker_style(@curve_style,
z, @zmin, @zmax)
ms.draw_markers_at(t, x, y)
end
end
end
## Actually draws the curve
def real_do(t)
debug { "Plotting curve #{inspect}" }
t.context do
## \todo allow customization of the order of drawing,
## using a simple user-specificable array of path,
## markers... and use the corresponding #draw_path or
## #draw_markers... Ideally, any string could be used, and
## warnings should be issued on missing symbols.
# draw_fill(t)
# draw_errorbars(t)
@parametric_style.prepare
if @dataset.z_columns < @parametric_style.z_columns_needed
error { "Need #{@parametric_style.z_columns_needed} Z columns, but have only #{@dataset.z_columns} for dataset #{@dataset.name}" }
return
end
draw_path(t)
draw_markers(t)
if @curve_style.zaxis
begin
@parent.style.get_axis_style(@curve_style.zaxis).
set_color_map(@curve_style.marker_color_map,
@dataset.z.values.min,
@dataset.z.values.max)
rescue
error { "Could not set Z info to non-existent axis #{@curve_style.zaxis}" }
end
end
# draw_error_bars(t) ??
end
end
end
end
end
end
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