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Update Model::calculateTriangleSets to use hfm::Shapes

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This commit is contained in:
sabrina-shanman 2019-11-08 13:56:44 -08:00
parent eebb9ad51f
commit b7da5d0d72
1 changed files with 52 additions and 60 deletions
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112
libraries/render-utils/src/Model.cpp
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@ -824,77 +824,69 @@ scriptable::ScriptableModelBase Model::getScriptableModel() {
void Model::calculateTriangleSets(const HFMModel& hfmModel) {
PROFILE_RANGE(render, __FUNCTION__);
uint32_t numberOfMeshes = (uint32_t)hfmModel.meshes.size();
uint32_t meshInstanceCount = 0;
uint32_t lastMeshForInstanceCount = hfm::UNDEFINED_KEY;
for (const auto& shape : hfmModel.shapes) {
if (shape.mesh != lastMeshForInstanceCount) {
++meshInstanceCount;
}
lastMeshForInstanceCount = shape.mesh;
}
_triangleSetsValid = true;
_modelSpaceMeshTriangleSets.clear();
_modelSpaceMeshTriangleSets.resize(numberOfMeshes);
_modelSpaceMeshTriangleSets.reserve(meshInstanceCount);
for (uint32_t i = 0; i < numberOfMeshes; i++) {
const HFMMesh& mesh = hfmModel.meshes.at(i);
uint32_t lastMeshForTriangleBuilding = hfm::UNDEFINED_KEY;
glm::mat4 lastTransformForTriangleBuilding { 0 };
std::vector<glm::vec3> transformedPoints;
for (const auto& shape : hfmModel.shapes) {
const uint32_t meshIndex = shape.mesh;
const hfm::Mesh& mesh = hfmModel.meshes.at(meshIndex);
const auto& triangleListMesh = mesh.triangleListMesh;
const glm::vec2 part = triangleListMesh.parts[shape.meshPart];
glm::mat4 worldFromMeshTransform;
if (shape.joint != hfm::UNDEFINED_KEY) {
// globalTransform includes hfmModel.offset,
// which includes the scaling, rotation, and translation specified by the FST,
// and the scaling from the unit conversion in FBX.
// This can't change at runtime, so we can safely store these in our TriangleSet.
worldFromMeshTransform = hfmModel.joints[shape.joint].globalTransform;
}
const uint32_t numberOfParts = (uint32_t)mesh.parts.size();
auto& meshTriangleSets = _modelSpaceMeshTriangleSets[i];
meshTriangleSets.resize(numberOfParts);
if (meshIndex != lastMeshForTriangleBuilding || worldFromMeshTransform != lastTransformForTriangleBuilding) {
lastMeshForTriangleBuilding = meshIndex;
lastTransformForTriangleBuilding = worldFromMeshTransform;
_modelSpaceMeshTriangleSets.emplace_back();
_modelSpaceMeshTriangleSets.back().reserve(mesh.parts.size());
for (uint32_t j = 0; j < numberOfParts; j++) {
const HFMMeshPart& part = mesh.parts.at(j);
auto& partTriangleSet = meshTriangleSets[j];
const int INDICES_PER_TRIANGLE = 3;
const int INDICES_PER_QUAD = 4;
const int TRIANGLES_PER_QUAD = 2;
// tell our triangleSet how many triangles to expect.
int numberOfQuads = part.quadIndices.size() / INDICES_PER_QUAD;
int numberOfTris = part.triangleIndices.size() / INDICES_PER_TRIANGLE;
int totalTriangles = (numberOfQuads * TRIANGLES_PER_QUAD) + numberOfTris;
partTriangleSet.reserve(totalTriangles);
auto meshTransform = hfmModel.offset * mesh.modelTransform;
if (part.quadIndices.size() > 0) {
int vIndex = 0;
for (int q = 0; q < numberOfQuads; q++) {
int i0 = part.quadIndices[vIndex++];
int i1 = part.quadIndices[vIndex++];
int i2 = part.quadIndices[vIndex++];
int i3 = part.quadIndices[vIndex++];
// track the model space version... these points will be transformed by the FST's offset,
// which includes the scaling, rotation, and translation specified by the FST/FBX,
// this can't change at runtime, so we can safely store these in our TriangleSet
glm::vec3 v0 = glm::vec3(meshTransform * glm::vec4(mesh.vertices[i0], 1.0f));
glm::vec3 v1 = glm::vec3(meshTransform * glm::vec4(mesh.vertices[i1], 1.0f));
glm::vec3 v2 = glm::vec3(meshTransform * glm::vec4(mesh.vertices[i2], 1.0f));
glm::vec3 v3 = glm::vec3(meshTransform * glm::vec4(mesh.vertices[i3], 1.0f));
Triangle tri1 = { v0, v1, v3 };
Triangle tri2 = { v1, v2, v3 };
partTriangleSet.insert(tri1);
partTriangleSet.insert(tri2);
transformedPoints = triangleListMesh.vertices;
if (worldFromMeshTransform != glm::mat4()) {
for (auto& point : transformedPoints) {
point = glm::vec3(worldFromMeshTransform * glm::vec4(point, 1.0f));
}
}
}
auto& meshTriangleSets = _modelSpaceMeshTriangleSets.back();
meshTriangleSets.emplace_back();
auto& partTriangleSet = meshTriangleSets.back();
if (part.triangleIndices.size() > 0) {
int vIndex = 0;
for (int t = 0; t < numberOfTris; t++) {
int i0 = part.triangleIndices[vIndex++];
int i1 = part.triangleIndices[vIndex++];
int i2 = part.triangleIndices[vIndex++];
const static size_t INDICES_PER_TRIANGLE = 3;
const size_t triangleCount = (size_t)(part.y) / INDICES_PER_TRIANGLE;
partTriangleSet.reserve(triangleCount);
const size_t indexStart = (uint32_t)part.x;
const size_t indexEnd = indexStart + (triangleCount * INDICES_PER_TRIANGLE);
for (size_t i = indexStart; i < indexEnd; i += INDICES_PER_TRIANGLE) {
const int i0 = triangleListMesh.indices[i];
const int i1 = triangleListMesh.indices[i + 1];
const int i2 = triangleListMesh.indices[i + 2];
// track the model space version... these points will be transformed by the FST's offset,
// which includes the scaling, rotation, and translation specified by the FST/FBX,
// this can't change at runtime, so we can safely store these in our TriangleSet
glm::vec3 v0 = glm::vec3(meshTransform * glm::vec4(mesh.vertices[i0], 1.0f));
glm::vec3 v1 = glm::vec3(meshTransform * glm::vec4(mesh.vertices[i1], 1.0f));
glm::vec3 v2 = glm::vec3(meshTransform * glm::vec4(mesh.vertices[i2], 1.0f));
const glm::vec3 v0 = transformedPoints[i0];
const glm::vec3 v1 = transformedPoints[i1];
const glm::vec3 v2 = transformedPoints[i2];
Triangle tri = { v0, v1, v2 };
partTriangleSet.insert(tri);
}
}
const Triangle tri = { v0, v1, v2 };
partTriangleSet.insert(tri);
}
}
}