MeshSampler

Select uniformly distributed points on a mesh based on Euclidean or Geodesic distance measure

Templates:

• Vec3d

Target: Sofa.Component.Engine.Select

namespace: sofa::component::engine::select

parents:

• DataEngine

Data:

Name	Description	Default value
name	object name	unnamed
printLog	if true, emits extra messages at runtime.	0
tags	list of the subsets the objet belongs to
bbox	this object bounding box
componentState	The state of the component among (Dirty, Valid, Undefined, Loading, Invalid).	Undefined
listening	if true, handle the events, otherwise ignore the events	0
Inputs
number	Sample number	1
position	Input positions.
edges	Input edges for geodesic sampling (Euclidean distances are used if not specified).
maxIter	Max number of Lloyd iterations.	100
Outputs
outputIndices	Computed sample indices.
outputPosition	Computed sample coordinates.

Links:

Name	Description
context	Graph Node containing this object (or BaseContext::getDefault() if no graph is used)
slaves	Sub-objects used internally by this object
master	nullptr for regular objects, or master object for which this object is one sub-objects

Examples

Component/Engine/Select/MeshSampler.scn

XMLPython

<?xml version="1.0"?>
<Node   name="root" gravity="0 -1 0" dt="0.05"  >
    <RequiredPlugin name="Sofa.Component.Engine.Select"/> <!-- Needed to use components [MeshSampler] -->
    <RequiredPlugin name="Sofa.Component.IO.Mesh"/> <!-- Needed to use components [MeshOBJLoader] -->
    <RequiredPlugin name="Sofa.Component.StateContainer"/> <!-- Needed to use components [MechanicalObject] -->
    <RequiredPlugin name="Sofa.Component.Topology.Container.Constant"/> <!-- Needed to use components [MeshTopology] -->
    <RequiredPlugin name="Sofa.Component.Visual"/> <!-- Needed to use components [VisualStyle] -->
    <RequiredPlugin name="Sofa.GL.Component.Rendering3D"/> <!-- Needed to use components [OglModel] -->
    <VisualStyle displayFlags="showWireframe" />
    <DefaultAnimationLoop/>

    <Node name="using Geodesic Distances (red)" >
        <MeshOBJLoader name="meshLoader_1" filename="mesh/dragon.obj" handleSeams="1" />
        <OglModel name="Visual" src="@meshLoader_1" color="red" dz="0" />
        <MeshTopology name="topo" src="@Visual" />
        <MeshSampler name="sampler1" position="@topo.position" edges="@topo.edges"  number="10" maxIter="100" printLog="1"/>
        <MechanicalObject template="Vec3" position="@sampler1.outputPosition" showObject="1" showObjectScale="10" />
    </Node>

    <Node name="using Euclidean Distances (blue)" >
        <MeshOBJLoader name="meshLoader_0" filename="mesh/dragon.obj" handleSeams="1" />
        <OglModel name="Visual" src="@meshLoader_0" color="blue" dy="20" />

        <MeshSampler name="sampler2" position="@Visual.position"  number="10" maxIter="100" printLog="1"/>
        <MechanicalObject template="Vec3" position="@sampler2.outputPosition" showObject="1" showObjectScale="10" />
    </Node>

</Node>

def createScene(rootNode):

    root = rootNode.addChild('root', gravity="0 -1 0", dt="0.05")
    root.addObject('RequiredPlugin', name="Sofa.Component.Engine.Select")
    root.addObject('RequiredPlugin', name="Sofa.Component.IO.Mesh")
    root.addObject('RequiredPlugin', name="Sofa.Component.StateContainer")
    root.addObject('RequiredPlugin', name="Sofa.Component.Topology.Container.Constant")
    root.addObject('RequiredPlugin', name="Sofa.Component.Visual")
    root.addObject('RequiredPlugin', name="Sofa.GL.Component.Rendering3D")
    root.addObject('VisualStyle', displayFlags="showWireframe")
    root.addObject('DefaultAnimationLoop')

    using Geodesic Distances (red) = root.addChild('using Geodesic Distances (red)')
    using Geodesic Distances (red).addObject('MeshOBJLoader', name="meshLoader_1", filename="mesh/dragon.obj", handleSeams="1")
    using Geodesic Distances (red).addObject('OglModel', name="Visual", src="@meshLoader_1", color="red", dz="0")
    using Geodesic Distances (red).addObject('MeshTopology', name="topo", src="@Visual")
    using Geodesic Distances (red).addObject('MeshSampler', name="sampler1", position="@topo.position", edges="@topo.edges", number="10", maxIter="100", printLog="1")
    using Geodesic Distances (red).addObject('MechanicalObject', template="Vec3", position="@sampler1.outputPosition", showObject="1", showObjectScale="10")

    using Euclidean Distances (blue) = root.addChild('using Euclidean Distances (blue)')
    using Euclidean Distances (blue).addObject('MeshOBJLoader', name="meshLoader_0", filename="mesh/dragon.obj", handleSeams="1")
    using Euclidean Distances (blue).addObject('OglModel', name="Visual", src="@meshLoader_0", color="blue", dy="20")
    using Euclidean Distances (blue).addObject('MeshSampler', name="sampler2", position="@Visual.position", number="10", maxIter="100", printLog="1")
    using Euclidean Distances (blue).addObject('MechanicalObject', template="Vec3", position="@sampler2.outputPosition", showObject="1", showObjectScale="10")