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added code to split an fbx into one obj file per mesh-part

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This commit is contained in:
Seth Alves 2015-04-03 19:30:05 -07:00
parent 2dc4410f7e
commit 1a7bdee180
2 changed files with 52 additions and 22 deletions
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69
tools/vhacd/src/VHACDUtil.cpp
View file

@ -89,15 +89,51 @@ bool vhacd::VHACDUtil::loadFBX(const QString filename, FBXGeometry& result) {
AABox getAABoxForMeshPart(const FBXMesh& mesh, const FBXMeshPart &meshPart) {
AABox aaBox;
unsigned int triangleCount = meshPart.triangleIndices.size() / 3;
for (unsigned int i = 0; i < triangleCount; i++) {
glm::vec3 p0 = mesh.vertices[meshPart.triangleIndices[i * 3]];
glm::vec3 p1 = mesh.vertices[meshPart.triangleIndices[i * 3 + 1]];
glm::vec3 p2 = mesh.vertices[meshPart.triangleIndices[i * 3 + 2]];
aaBox += p0;
aaBox += p1;
aaBox += p2;
}
unsigned int quadCount = meshPart.quadIndices.size() / 4;
for (unsigned int i = 0; i < quadCount; i++) {
unsigned int p0Index = meshPart.quadIndices[i * 4];
unsigned int p1Index = meshPart.quadIndices[i * 4 + 1];
unsigned int p2Index = meshPart.quadIndices[i * 4 + 2];
unsigned int p3Index = meshPart.quadIndices[i * 4 + 3];
glm::vec3 p0 = mesh.vertices[p0Index];
glm::vec3 p1 = mesh.vertices[p1Index + 1];
glm::vec3 p2 = mesh.vertices[p2Index + 2];
glm::vec3 p3 = mesh.vertices[p3Index + 3];
aaBox += p0;
aaBox += p1;
aaBox += p2;
aaBox += p3;
}
return aaBox;
}
bool vhacd::VHACDUtil::computeVHACD(FBXGeometry& geometry,
VHACD::IVHACD::Parameters params,
FBXGeometry& result,
int startMeshIndex,
int endMeshIndex, float minimumMeshSize,
int endMeshIndex,
float minimumMeshSize, float maximumMeshSize,
bool fattenFaces) {
// count the mesh-parts
QVector<FBXMeshPart> meshParts;
int meshCount = 0;
foreach (const FBXMesh& mesh, geometry.meshes) {
meshCount += mesh.parts.size();
}
VHACD::IVHACD * interfaceVHACD = VHACD::CreateVHACD();
@ -134,32 +170,16 @@ bool vhacd::VHACDUtil::computeVHACD(FBXGeometry& geometry,
std::vector<int> triangles = meshPart.triangleIndices.toStdVector();
AABox aaBox;
unsigned int triangleCount = meshPart.triangleIndices.size() / 3;
for (unsigned int i = 0; i < triangleCount; i++) {
glm::vec3 p0 = mesh.vertices[meshPart.triangleIndices[i * 3]];
glm::vec3 p1 = mesh.vertices[meshPart.triangleIndices[i * 3 + 1]];
glm::vec3 p2 = mesh.vertices[meshPart.triangleIndices[i * 3 + 2]];
aaBox += p0;
aaBox += p1;
aaBox += p2;
}
AABox aaBox = getAABoxForMeshPart(mesh, meshPart);
// convert quads to triangles
unsigned int triangleCount = meshPart.triangleIndices.size() / 3;
unsigned int quadCount = meshPart.quadIndices.size() / 4;
for (unsigned int i = 0; i < quadCount; i++) {
unsigned int p0Index = meshPart.quadIndices[i * 4];
unsigned int p1Index = meshPart.quadIndices[i * 4 + 1];
unsigned int p2Index = meshPart.quadIndices[i * 4 + 2];
unsigned int p3Index = meshPart.quadIndices[i * 4 + 3];
glm::vec3 p0 = mesh.vertices[p0Index];
glm::vec3 p1 = mesh.vertices[p1Index + 1];
glm::vec3 p2 = mesh.vertices[p2Index + 2];
glm::vec3 p3 = mesh.vertices[p3Index + 3];
aaBox += p0;
aaBox += p1;
aaBox += p2;
aaBox += p3;
// split each quad into two triangles
triangles.push_back(p0Index);
triangles.push_back(p1Index);
@ -183,12 +203,19 @@ bool vhacd::VHACDUtil::computeVHACD(FBXGeometry& geometry,
qDebug() << "Mesh " << count << " -- " << nPoints << " points, " << triangleCount << " triangles, "
<< "size =" << largestDimension;
if (largestDimension < minimumMeshSize /* || largestDimension > 1000 */) {
if (largestDimension < minimumMeshSize) {
qDebug() << " Skipping (too small)...";
count++;
continue;
}
if (maximumMeshSize > 0.0 && largestDimension > maximumMeshSize) {
qDebug() << " Skipping (too large)...";
count++;
continue;
}
// compute approximate convex decomposition
bool res = interfaceVHACD->Compute(&vertices[0].x, 3, nPoints, &triangles[0], 3, triangleCount, params);
if (!res){

5
tools/vhacd/src/VHACDUtil.h
View file

@ -32,7 +32,7 @@ namespace vhacd {
VHACD::IVHACD::Parameters params,
FBXGeometry& result,
int startMeshIndex, int endMeshIndex,
float minimumMeshSize,
float minimumMeshSize, float maximumMeshSize,
bool fattenFaces);
~VHACDUtil();
};
@ -47,4 +47,7 @@ namespace vhacd {
const char * const stage, const char * const operation);
};
}
AABox getAABoxForMeshPart(const FBXMeshPart &meshPart);
#endif //hifi_VHACDUtil_h