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__init__.py
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__init__.py
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import bpy
import binascii
import struct
from liblas import file
from liblas import header
from liblas import color
import multiprocessing
import time
import bgl
# ImportHelper is a helper class, defines filename and
# invoke() function which calls the file selector.
from bpy_extras.io_utils import ImportHelper
from bpy.props import StringProperty, BoolProperty, EnumProperty, IntProperty
from bpy.types import Operator
# Blender Addon Information
# Used by User Preferences > Addons
bl_info = {
"name" : "LiDAR Importer",
"author" : "Brian C. Hynds",
"version" : (0, 1),
"blender" : (2, 6, 0),
"description" : "LiDAR File Importer with 3D Object Recognition",
"category" : "Import-Export",
"location" : "File > Import"
}
# Not In Use Yet: For implementing Multiprocessing Module
def worker(ImportLiDARData):
print("")
# Not In Use Yet: For implementing Multiprocessing Module
def worker_complete(result):
print("")
class ImportLiDARData(Operator, ImportHelper):
"""Load a LiDAR .las file"""
bl_idname = "import_mesh.lidar" # important since its how bpy.ops.import_mesh.lidar is constructed
bl_label = "Import LiDAR File"
# ImportHelper mixin class uses this
filename_ext = ".las"
filter_glob = StringProperty(
default="*.las",
options={'HIDDEN'}
)
# List of operator properties, the attributes will be assigned to the class instance from the operator settings before calling.
pointCloudResolution = IntProperty(
name="Point Resolution",
min=1,
max=100,
description="This is a percentage resolution of the total point cloud to import.",
default=100
)
cleanScene = BoolProperty(
name="Empty Scene",
description="Enable to remove all objects from current scene",
default=True
)
def execute(self, context):
return read_lidar_data(context, self.filepath, self.pointCloudResolution, self.cleanScene)
# Addon GUI Panel
class LiDARPanel(bpy.types.Panel):
"""LiDAR Addon Panel"""
bl_label = "LiDAR Addon"
bl_space_type = "VIEW_3D"
bl_region_type = "TOOLS"
bl_category = "LiDAR Tools"
def draw(self, context):
layout = self.layout
row = layout.row()
row.operator("import_mesh.lidar")
def read_lidar_data(context, filepath, pointCloudResolution, cleanScene):
print("running read_lidar_data")
# importer start time
start_time = time.time()
# empty list for coordinates
coords = []
# reference to scene
scn = bpy.context.scene
# clear the scene if specified during file selection:
if (cleanScene):
for obj in scn.objects:
obj.select = True
bpy.ops.object.delete()
# create a new mesh
me = bpy.data.meshes.new("LidarMesh")
# create a new object with the mesh
obj = bpy.data.objects.new("LidarObject", me)
# link the mesh to the scene
scn.objects.link(obj)
scn.objects.active = obj
# Use this array for face construction if we decide to calculate them during import
# faces = []
# open the file
f = file.File(filepath,mode='r')
# lets get some header information from the file
fileCount = f.header.count
Xmax = f.header.max[0]
Ymax = f.header.max[1]
Zmax = f.header.max[2]
Xmin = f.header.min[0]
Ymin = f.header.min[1]
Zmin = f.header.min[2]
# use this value for limiting the maximum number of points. Set to f.header.count for maximum.
maxNumPoints = f.header.count
currentPoint = 0
wm = bpy.context.window_manager
wm.progress_begin(0, maxNumPoints/10)
# iterate through the point cloud and import the X Y Z coords into the array
for p in f:
if maxNumPoints > 0:
coords.append((p.x-Xmin-((Xmax-Xmin)/2), p.y-Ymin-((Ymax-Ymin)/2), p.z-Zmin))
if (((currentPoint/maxNumPoints)*100)%10 == 0):
wm.progress_update(currentPoint)
currentPoint +=1
maxNumPoints -= 1
# Uncomment the following line for debugging purposes:
# print("XYZ:", p.x, ",", p.y, ",", p.z)
me.from_pydata(coords,[],[])
me.update()
# bpy.ops.object.mode_set(mode='EDIT', toggle=False)
# bpy.ops.object.mode_set(mode='OBJECT', toggle=False)
print(str(fileCount), " verticies in file")
print(str(currentPoint), " verticies imported")
print("Total time to process (seconds): ", time.time() - start_time)
print("File: ", filepath)
print("completed read_lidar_data...")
print("Percentage of points imported: ", pointCloudResolution)
context.area.header_text_set()
wm.progress_end()
return {'FINISHED'}
# Only needed if you want to add into a dynamic menu
def menu_func_import(self, context):
self.layout.operator(ImportLiDARData.bl_idname, text="LiDAR Format (.las)")
def register():
bpy.utils.register_class(ImportLiDARData)
bpy.utils.register_class(LiDARPanel)
bpy.types.INFO_MT_file_import.append(menu_func_import)
def unregister():
bpy.utils.unregister_class(ImportLiDARData)
bpy.utils.unregister_class(LiDARPanel)
bpy.types.INFO_MT_file_import.remove(menu_func_import)
if __name__ == "__main__":
register()
# test call
bpy.ops.import_mesh.lidar('INVOKE_DEFAULT')