This module contains classes used to load and handle point cloud data.
Right now the only exported classes are point cloud loaders for cyclops
These classes can be used to load models containing point cloud data in ASCII or binary xyz + RGB format.
Each line should contain 7 space-separated numbers represending 3D position and RGBA color. The color is represented as a float in the [0-1] range. Example:
0 0 0 1 1 1 1
0 10 0 0.5 0.5 0.5 1
10 0 0 1 0 0 1
10 10 0 1 1 1 1
Each record contains 7 double precision numbers (8 bytes each) represending 3D position and RGBA color.
To use TextPointsLoader:
from omega import *
from cyclops import *
from pointCloud import *
# Register the points loader
scene = getSceneManager()
scene.addLoader(TextPointsLoader())
# Load a points cloud using the standard loading command
pointCloudData = ModelInfo()
pointCloudData.name = "points"
pointCloudData.path = "points.xyz"
pointCloudData.optimize = True
scene.loadModel(pointCloudData)
# create a static object using the loaded data
object = StaticObject.create('points')The point clous library comes with a set of shaders to render points as spheres using a geometry shader. The shaders can be loaded as follows:
# The '..' at the beginning is to move up and out of the omega data dir. default shaders for
# pointCloud are inside the modules directory.
shaderPath = "../modules/pointCloud/shaders";
program = ProgramAsset()
program.name = "pointsDepth"
program.vertexShaderName = shaderPath + "/Sphere.vert"
program.fragmentShaderName = shaderPath + "/Sphere.frag"
program.geometryShaderName = shaderPath + "/Sphere.geom"
program.geometryOutVertices = 4
program.geometryInput = PrimitiveType.Points
program.geometryOutput = PrimitiveType.TriangleStrip
scene.addProgram(program)Applying the shader to a point cloud object can be done with the standard object.getMaterial().setProgram('programName') command, where programName should match the name used by the program above.