Tareno-Labs-LLC/Modularity
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simplified mesh collision loading for play mode, thanks physX 😭

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This commit is contained in:
Anemunt
2025-12-27 19:16:34 -05:00
parent 0035138a6c
commit 27f60c7a0f
6 changed files with 262 additions and 63 deletions
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21
src/Rendering.cpp
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@@ -363,6 +363,13 @@ int OBJLoader::loadOBJ(const std::string& filepath, std::string& errorMsg) {
glm::vec3 boundsMin(FLT_MAX);
glm::vec3 boundsMax(-FLT_MAX);
std::vector<glm::vec3> triPositions;
std::vector<glm::vec3> positions;
std::vector<uint32_t> triangleIndices;
positions.reserve(attrib.vertices.size() / 3);
for (size_t i = 0; i + 2 < attrib.vertices.size(); i += 3) {
positions.emplace_back(attrib.vertices[i], attrib.vertices[i + 1], attrib.vertices[i + 2]);
}
for (const auto& shape : shapes) {
size_t indexOffset = 0;
@@ -376,6 +383,8 @@ int OBJLoader::loadOBJ(const std::string& filepath, std::string& errorMsg) {
bool hasNormal = false;
};
std::vector<TempVertex> faceVerts;
std::vector<int> facePosIndices;
facePosIndices.reserve(static_cast<size_t>(fv));
for (int v = 0; v < fv; v++) {
tinyobj::index_t idx = shape.mesh.indices[indexOffset + v];
@@ -407,6 +416,7 @@ int OBJLoader::loadOBJ(const std::string& filepath, std::string& errorMsg) {
}
faceVerts.push_back(tv);
facePosIndices.push_back(idx.vertex_index);
}
if (!hasNormalsInFile && fv >= 3) {
@@ -424,6 +434,15 @@ int OBJLoader::loadOBJ(const std::string& filepath, std::string& errorMsg) {
for (int v = 1; v < fv - 1; v++) {
const TempVertex* tri[3] = { &faceVerts[0], &faceVerts[v], &faceVerts[v+1] };
int idx0 = facePosIndices[0];
int idx1 = facePosIndices[v];
int idx2 = facePosIndices[v + 1];
if (idx0 >= 0 && idx1 >= 0 && idx2 >= 0) {
triangleIndices.push_back(static_cast<uint32_t>(idx0));
triangleIndices.push_back(static_cast<uint32_t>(idx1));
triangleIndices.push_back(static_cast<uint32_t>(idx2));
}
for (int i = 0; i < 3; i++) {
triPositions.push_back(tri[i]->pos);
vertices.push_back(tri[i]->pos.x);
@@ -457,6 +476,8 @@ int OBJLoader::loadOBJ(const std::string& filepath, std::string& errorMsg) {
loaded.boundsMin = boundsMin;
loaded.boundsMax = boundsMax;
loaded.triangleVertices = std::move(triPositions);
loaded.positions = std::move(positions);
loaded.triangleIndices = std::move(triangleIndices);
loadedMeshes.push_back(std::move(loaded));
return static_cast<int>(loadedMeshes.size() - 1);