/usr/share/pyshared/liblas/point.py is in python-liblas 1.2.1-2.
This file is owned by root:root, with mode 0o644.
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/******************************************************************************
* $Id$
*
* Project: libLAS - http://liblas.org - A BSD library for LAS format data.
* Purpose: Python LASPoint implementation
* Author: Howard Butler, hobu.inc@gmail.com
*
******************************************************************************
* Copyright (c) 2008, Howard Butler
*
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in
* the documentation and/or other materials provided
* with the distribution.
* * Neither the name of the Martin Isenburg or Iowa Department
* of Natural Resources nor the names of its contributors may be
* used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
* OF SUCH DAMAGE.
****************************************************************************/
"""
import core
import datetime
import time
import math
import color
class Point(object):
def __init__(self, owned=True, handle=None, copy=False):
if handle:
if copy:
self.handle = core.las.LASPoint_Copy(handle)
else:
self.handle = handle
else:
self.handle = core.las.LASPoint_Create()
if not copy:
self.owned = owned
else:
self.owned = True
def __del__(self):
if self.owned:
if self.handle and core:
core.las.LASPoint_Destroy(self.handle)
def get_x(self):
"""Returns the X coordinate of the LAS point.
You are expected to properly de-scale the point according to the offset
and the X scale if it is a free-standing point. When points are
written to a LAS file, they will be scaled according to the header
parameters
"""
return core.las.LASPoint_GetX(self.handle)
def set_x(self, value):
"""Sets the X coordinate of the LAS point to a floating point value."""
return core.las.LASPoint_SetX(self.handle, value)
x = property(get_x, set_x)
def get_y(self):
"""Returns the Y coordinate of the LAS point.
You are expected to properly de-scale the point according to the offset
and the Y scale if it is a free-standing point. When points are
written to a LAS file, they will be scaled according to the header
parameters
"""
return core.las.LASPoint_GetY(self.handle)
def set_y(self, value):
"""Sets the Y coordinate of the LAS point to a floating point value."""
return core.las.LASPoint_SetY(self.handle, value)
y = property(get_y, set_y)
def get_z(self):
"""Returns the Z coordinate of the LAS point.
You are expected to properly de-scale the point according to the offset
and the Z scale if it is a free-standing point. When points are
written to a LAS file, they will be scaled according to the header
parameters
"""
return core.las.LASPoint_GetZ(self.handle)
def set_z(self, value):
"""Sets the Z coordinate of the LAS point to a floating point value."""
return core.las.LASPoint_SetZ(self.handle, value)
z = property(get_z, set_z)
def get_return_number(self):
"""Returns the return number of the point"""
return core.las.LASPoint_GetReturnNumber(self.handle)
def set_return_number(self, value):
"""Sets the return number of the point to an integer"""
core.las.LASPoint_SetReturnNumber(self.handle, value)
return_number = property(get_return_number, set_return_number)
def get_number_of_returns(self):
"""Returns the number of returns for the point"""
return core.las.LASPoint_GetNumberOfReturns(self.handle)
def set_number_of_returns(self, value):
"""Sets the number of returns for the point"""
core.las.LASPoint_SetNumberOfReturns(self.handle, value)
number_of_returns = property(get_number_of_returns, set_number_of_returns)
def get_scan_direction(self):
"""Returns the scan direction angle for the point"""
return core.las.LASPoint_GetScanDirection(self.handle)
def set_scan_direction(self, value):
"""Sets the scan direction angle as an integer for the point"""
core.las.LASPoint_SetScanDirection(self.handle, value)
scan_direction = property(get_scan_direction, set_scan_direction)
def get_flightline_edge(self):
"""Denotes whether the point is a flight line edge"""
return core.las.LASPoint_GetFlightLineEdge(self.handle)
def set_flightline_edge(self, value):
"""Sets the flightline edge as an integer for the point. Must be 0 (not an edge) or 1 (an edge)"""
core.las.LASPoint_SetFlightLineEdge(self.handle, value)
flightline_edge = property(get_flightline_edge, set_flightline_edge)
def get_scan_flags(self):
"""Returns the raw scan flags for the point.
See the LAS 1.0 or 1.1 specification for information how to interpret
"""
return core.las.LASPoint_GetScanFlags(self.handle)
def set_scan_flags(self, value):
"""Sets the raw scan flags for the point.
See the LAS 1.0 or 1.1 specification for information how to interpret or
use the convenience functions like flightline_edge, scan_direction, etc.
"""
core.las.LASPoint_SetScanFlags(self.handle, value)
scan_flags = property(get_scan_flags, set_scan_flags)
def get_classification(self):
return core.las.LASPoint_GetClassification(self.handle)
def set_classification(self, value):
core.las.LASPoint_SetClassification(self.handle, value)
classification = property(get_classification, set_classification)
def get_scan_angle_rank(self):
"""Returns the scan angle rank of the point. It will be between -90 and 90"""
return core.las.LASPoint_GetScanAngleRank(self.handle)
def set_scan_angle_rank(self, value):
"""Sets the scan angle rank of the point. It must be between -90 and 90"""
core.las.LASPoint_SetScanAngleRank(self.handle, value)
scan_angle = property(get_scan_angle_rank, set_scan_angle_rank)
def get_user_data(self):
return core.las.LASPoint_GetUserData(self.handle)
def set_user_data(self, value):
core.las.LASPoint_SetUserData(self.handle, value)
user_data = property(get_user_data, set_user_data)
def get_intensity(self):
return core.las.LASPoint_GetIntensity(self.handle)
def set_intensity(self, value):
core.las.LASPoint_SetIntensity(self.handle, value)
intensity = property(get_intensity, set_intensity)
def get_time(self):
t = core.las.LASPoint_GetTime(self.handle)
floor = math.floor(t)
ms = float(t) - floor
# clip to 999999
ms = int(round(ms* 1000000 ))
if ms > 999999:
ms = 999999
lt = time.gmtime(t)
value = datetime.datetime(lt[0],lt[1],lt[2],lt[3],lt[4],lt[5],ms)
return value
def set_time(self, value):
"""
Sets the time of the point from a datetime value
Parameters
----------
value : datetime.datetime instance or none to use the current time
Example
-------
>>> td = datetime.timedelta(hours=6) # my timezone is -6
>>> t = datetime.datetime(2008,3,19) -td
>>> p.time = t
>>> p.time
datetime.datetime(2008, 3, 19, 0, 0)
"""
t = time.mktime(value.timetuple())
ms = value.microsecond
t = float(t) + ms * 0.000001
core.las.LASPoint_SetTime(self.handle,t)
time = property(get_time, set_time)
def get_color(self):
return color.Color(handle=core.las.LASPoint_GetColor(self.handle))
def set_color(self, value):
return core.las.LASPoint_SetColor(self.handle, value.handle)
color = property(get_color, set_color)
def descale(self, header):
self.x = (self.x - header.offset[0]) / header.scale[0]
self.y = (self.y - header.offset[1]) / header.scale[1]
self.z = (self.z - header.offset[2]) / header.scale[2]
def scale(self, header):
self.x = self.x + header.scale[0] + header.offset[0]
self.y = self.y + header.scale[1] + header.offset[1]
self.z = self.z + header.scale[2] + header.offset[2]
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