[SOLVED] How to get access to the indices in a Map?

[mbarrow]

I want to map a RegularGridTopology to a TriangleSetTopology.
Although I see an example in examples/Componets/topology/Tetra2TriangleTopologicalMapping.scn I don’t see how I can access the map.

For example In python I would like to use a map indice to color all vertices corresponding to an arbitrary tetrahedron.

How could I do that using the maps in Tetra2TriangleTopologicalMapping.scn?

...
        <Node name="Triangles Mesh">
            <TriangleSetTopologyContainer name="Container" />
            <TriangleSetTopologyModifier name="Modifier" />
            <TriangleSetTopologyAlgorithms template="Vec3d" name="TopoAlgo" />
            <TriangleSetGeometryAlgorithms template="Vec3d" name="GeomAlgo" />
            <Tetra2TriangleTopologicalMapping name="Mapping" input="@../Container" output="@Container" />
<!-- what should the "color(self,node) and onEndAnimationStep(self)" methods look like? -->
		<PythonScriptController filename="color.py" classname="Cool_color" variables="Mapping" />
            <TriangularBendingSprings template="Vec3d" name="FEM-Bend" stiffness="300" damping="1" />
            <TriangleModel name="Models" />
            <Node name="Visu">
                <OglModel template="ExtVec3f" name="Visual" material="Default Diffuse 1 0 0 1 1 Ambient 1 0 0 0.2 1 Specular 0 0 0 1 1 Emissive 0 0 0 1 1 Shininess 0 45" />
                <IdentityMapping template="Vec3d,ExtVec3f" name="default17" input="@../../Volume" output="@Visual" />
            </Node>
        </Node>
...

Thanks

[Hugo]

Hi @mjbarrow,

you can do as follows:

<!-- RegularGrid examples -->
<Node name="root" dt="0.02">
    <VisualStyle displayFlags="showBehaviorModels showForceFields showVisual" />
    <CollisionPipeline verbose="0" />
    <BruteForceDetection name="N2" />
    <CollisionResponse response="default" />
    <DiscreteIntersection/>
    <Node name="LiverFFD-lowres">
        <EulerImplicit  rayleighStiffness="0.1" rayleighMass="0.1" />
        <CGLinearSolver iterations="100" tolerance="1e-7" threshold="1e-7"/>
        <MechanicalObject />
        <UniformMass totalMass="100.0" />
        <RegularGrid name="grid" nx="4" ny="3" nz="3" xmin="-10.25" xmax="-3.25" ymin="0.25" ymax="5.25" zmin="-2" zmax="3" />
        <BoxConstraint box="-8.5 0 -2.5 -5 3 2" />
        <RegularGridSpringForceField name="Springs" stiffness="400" damping="4" />
        <Node name="Visu">
            <TriangleSetTopologyContainer name="Container" />
            <TriangleSetTopologyModifier name="Modifier" />
            <TriangleSetTopologyAlgorithms template="Vec3d" name="TopoAlgo" />
            <TriangleSetGeometryAlgorithms template="Vec3d" name="GeomAlgo" />
            <Quad2TriangleTopologicalMapping name="Mapping" input="@../grid" output="@Container" />

        </Node>
    </Node>
</Node>

Let me know if it helps

Hugo

[mbarrow]

Hi Hugo,

thanks this worked perfectly!

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