void MyDisplayVertices1::compute()
{
int i;
// Access input object (portData is inherited from HxModule):
HxSurface* surface = (HxSurface*) portData.source();
if (!surface) { // Check if input object is available
hideGeom(scene);
return;
}
// Get value from input port, query size of surface:
int numTriPerVertex = portNumTriangles.getValue();
int nVertices = surface->points.size();
int nTriangles = surface->triangles.size();
// We need a triangle counter for every vertex:
McDArray<unsigned short> triCount(nVertices);
triCount.fill(0);
// Loop through all triangles and increase counter of the vertices:
for (i=0; i<nTriangles; i++)
for (int j=0; j<3; j++)
triCount[surface->triangles[i].points[j]]++;
// Now create the scene graph. First remove all previous childs:
scene->removeAllChildren();
// Cube size should be 1% of the diagonal of the bounding box.
float size = surface->getBoundingBoxSize().length() * 0.01;
// Pointer to surface coordinates casted from McVec3f to SbVec3f.
SbVec3f* p = (SbVec3f*) surface->points.dataPtr();
SbVec3f q(0,0,0); // position of last point
int count = 0; // vertex counter
for (i=0; i<nVertices; i++) {
if (triCount[i] == numTriPerVertex) {
SoTranslation* trans = new SoTranslation;
trans->translation.setValue(p[i]-q);
SoCube* cube = new SoCube;
cube->width = cube->height = cube->depth = size;
scene->addChild(trans);
scene->addChild(cube);
count++;
q=p[i];
}
}
theMsg->printf("Found %d vertices belonging to %d triangles",
count, numTriPerVertex);
showGeom(scene); // finally show scene in viewer
}
void NxAbstractMeshDescription::UpdateDerivedInformation(NxApexRenderDebug* renderDebug)
{
if (numIndices > 0)
{
pMin = pPosition[pIndices[0]];
pMax = pMin;
}
avgEdgeLength = 0;
avgTriangleArea = 0;
PxU32 triCount(numIndices / 3);
PxU32 edgeCount(numIndices);
for (PxU32 j = 0; j < numIndices; j += 3)
{
PxU32 i0 = pIndices[j + 0];
PxU32 i1 = pIndices[j + 1];
PxU32 i2 = pIndices[j + 2];
const PxVec3& v0 = pPosition[i0];
const PxVec3& v1 = pPosition[i1];
const PxVec3& v2 = pPosition[i2];
pMin.minimum(v0);
pMin.minimum(v1);
pMin.minimum(v2);
pMax.maximum(v0);
pMax.maximum(v1);
pMax.maximum(v2);
PxVec3 e0 = v1 - v0;
PxVec3 e1 = v2 - v1;
PxVec3 e2 = v0 - v2;
avgEdgeLength += e0.magnitude();
avgEdgeLength += e1.magnitude();
avgEdgeLength += e2.magnitude();
if (renderDebug)
{
renderDebug->setCurrentColor(renderDebug->getDebugColor(physx::DebugColors::DarkBlue));
renderDebug->debugLine(v0, v1);
renderDebug->debugLine(v1, v2);
renderDebug->debugLine(v2, v0);
renderDebug->setCurrentColor(renderDebug->getDebugColor(physx::DebugColors::Green));
renderDebug->debugPoint(v0, 0.1f);
renderDebug->debugPoint(v1, 0.1f);
renderDebug->debugPoint(v2, 0.1f);
}
PxF32 triangleArea = e0.cross(e2).magnitude() * 0.5f;
avgTriangleArea += triangleArea;
triCount++;
}
avgEdgeLength /= edgeCount;
avgTriangleArea /= triCount;
centroid = 0.5f * (pMin + pMax);
radius = 0.5f * (pMax - pMin).magnitude();
//printf("Min = <%f, %f, %f>; Max = <%f, %f, %f>; centroid = <%f, %f, %f>; radius = %f; avgEdgeLength = %f; avgTriangleArea = %f;\n",
// pMin.x, pMin.y, pMin.z, pMax.x, pMax.y, pMax.z, centroid.x, centroid.y, centroid.z, radius, avgEdgeLength, avgTriangleArea);
}
