void testCreateMesh() {
PolygonalMesh mesh;
ASSERT(mesh.getNumFaces() == 0);
ASSERT(mesh.getNumVertices() == 0);
ASSERT(mesh.addVertex(Vec3(0)) == 0);
ASSERT(mesh.addVertex(Vec3(0, 1, 0)) == 1);
ASSERT(mesh.addVertex(Vec3(0, 0, 1)) == 2);
Array_<int> v;
v.push_back(1);
v.push_back(2);
v.push_back(0);
ASSERT(mesh.addFace(v) == 0);
ASSERT(mesh.getNumFaces() == 1);
ASSERT(mesh.getNumVertices() == 3);
ASSERT(mesh.getFaceVertex(0, 0) == 1);
ASSERT(mesh.getFaceVertex(0, 1) == 2);
ASSERT(mesh.getFaceVertex(0, 2) == 0);
ASSERT(mesh.getVertexPosition(0) == Vec3(0));
ASSERT(mesh.getVertexPosition(1) == Vec3(0, 1, 0));
ASSERT(mesh.getVertexPosition(2) == Vec3(0, 0, 1));
// Make sure copy and assignment are shallow.
PolygonalMesh mesh2(mesh); // shallow copy construction
ASSERT(&mesh2.getImpl() == &mesh.getImpl());
ASSERT(mesh.getImplHandleCount()==2);
PolygonalMesh mesh3;
mesh3 = mesh; // shallow assignment
ASSERT(&mesh3.getImpl() == &mesh.getImpl());
ASSERT(mesh.getImplHandleCount()==3);
PolygonalMesh mesh4;
mesh4.copyAssign(mesh); // deep copy
ASSERT(mesh4.getNumVertices() == mesh.getNumVertices());
ASSERT(&mesh4.getImpl() != &mesh.getImpl());
ASSERT(mesh4.getImplHandleCount()==1);
ASSERT(mesh.getImplHandleCount()==3);
}
void VisualizerProtocol::drawPolygonalMesh(const PolygonalMesh& mesh, const Transform& X_GM, const Vec3& scale, const Vec4& color, int representation) {
const void* impl = &mesh.getImpl();
map<const void*, unsigned short>::const_iterator iter = meshes.find(impl);
if (iter != meshes.end()) {
// This mesh was already cached; just reference it by index number.
drawMesh(X_GM, scale, color, (short)representation, iter->second, 0);
return;
}
// This is a new mesh, so we need to send it to the visualizer. Build lists
// of vertices and faces, triangulating as necessary.
vector<float> vertices;
vector<unsigned short> faces;
for (int i = 0; i < mesh.getNumVertices(); i++) {
Vec3 pos = mesh.getVertexPosition(i);
vertices.push_back((float) pos[0]);
vertices.push_back((float) pos[1]);
vertices.push_back((float) pos[2]);
}
for (int i = 0; i < mesh.getNumFaces(); i++) {
int numVert = mesh.getNumVerticesForFace(i);
if (numVert < 3)
continue; // Ignore it.
if (numVert == 3) {
faces.push_back((unsigned short) mesh.getFaceVertex(i, 0));
faces.push_back((unsigned short) mesh.getFaceVertex(i, 1));
faces.push_back((unsigned short) mesh.getFaceVertex(i, 2));
}
else if (numVert == 4) {
// Split it into two triangles.
faces.push_back((unsigned short) mesh.getFaceVertex(i, 0));
faces.push_back((unsigned short) mesh.getFaceVertex(i, 1));
faces.push_back((unsigned short) mesh.getFaceVertex(i, 2));
faces.push_back((unsigned short) mesh.getFaceVertex(i, 2));
faces.push_back((unsigned short) mesh.getFaceVertex(i, 3));
faces.push_back((unsigned short) mesh.getFaceVertex(i, 0));
}
else {
// Add a vertex at the center, then split it into triangles.
Vec3 center(0);
for (int j = 0; j < numVert; j++) {
Vec3 pos = mesh.getVertexPosition(mesh.getFaceVertex(i,j));
center += pos;
}
center /= numVert;
vertices.push_back((float) center[0]);
vertices.push_back((float) center[1]);
vertices.push_back((float) center[2]);
const unsigned newIndex = (unsigned)(vertices.size()/3-1);
for (int j = 0; j < numVert-1; j++) {
faces.push_back((unsigned short) mesh.getFaceVertex(i, j));
faces.push_back((unsigned short) mesh.getFaceVertex(i, j+1));
faces.push_back((unsigned short) newIndex);
}
// Close the face (thanks, Alexandra Zobova).
faces.push_back((unsigned short) mesh.getFaceVertex(i, numVert-1));
faces.push_back((unsigned short) mesh.getFaceVertex(i, 0));
faces.push_back((unsigned short) newIndex);
}
}
SimTK_ERRCHK1_ALWAYS(vertices.size() <= 65535*3,
"VisualizerProtocol::drawPolygonalMesh()",
"Can't display a DecorativeMesh with more than 65535 vertices;"
" received one with %llu.", (unsigned long long)vertices.size());
SimTK_ERRCHK1_ALWAYS(faces.size() <= 65535*3,
"VisualizerProtocol::drawPolygonalMesh()",
"Can't display a DecorativeMesh with more than 65535 vertices;"
" received one with %llu.", (unsigned long long)faces.size());
const int index = NumPredefinedMeshes + (int)meshes.size();
SimTK_ERRCHK_ALWAYS(index <= 65535,
"VisualizerProtocol::drawPolygonalMesh()",
"Too many unique DecorativeMesh objects; max is 65535.");
meshes[impl] = (unsigned short)index; // insert new mesh
WRITE(outPipe, &DefineMesh, 1);
unsigned short numVertices = (unsigned short)(vertices.size()/3);
unsigned short numFaces = (unsigned short)(faces.size()/3);
WRITE(outPipe, &numVertices, sizeof(short));
WRITE(outPipe, &numFaces, sizeof(short));
WRITE(outPipe, &vertices[0], (unsigned)(vertices.size()*sizeof(float)));
WRITE(outPipe, &faces[0], (unsigned)(faces.size()*sizeof(short)));
drawMesh(X_GM, scale, color, (short) representation, (unsigned short)index, 0);
}
