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Jan's fedback

pull/5003/head
Florian Born 2023-03-10 12:10:38 +01:00
parent dfd70b5c10
commit 60cefdd549
2 changed files with 30 additions and 19 deletions
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25
code/AssetLib/glTF2/glTF2Asset.inl
View File

@ -981,18 +981,29 @@ size_t Accessor::ExtractData(T *&outData, const std::vector<unsigned int> *remap
}
const size_t maxSize = GetMaxByteSize();
if (usedCount * stride > maxSize) {
throw DeadlyImportError("GLTF: count*stride ", (usedCount * stride), " > maxSize ", maxSize, " in ", getContextForErrorMessages(id, name));
}
outData = new T[usedCount];
if (remappingIndices == nullptr && stride == elemSize && targetElemSize == elemSize) {
memcpy(outData, data, totalSize);
} else {
if (remappingIndices != nullptr) {
const unsigned int maxIndex = static_cast<unsigned int>(maxSize / stride - 1);
for (size_t i = 0; i < usedCount; ++i) {
size_t srcIdx = remappingIndices != nullptr ? static_cast<size_t>((*remappingIndices)[i]) : i;
size_t srcIdx = (*remappingIndices)[i];
if (srcIdx > maxIndex) {
throw DeadlyImportError("GLTF: index*stride ", (srcIdx * stride), " > maxSize ", maxSize, " in ", getContextForErrorMessages(id, name));
}
memcpy(outData + i, data + srcIdx * stride, elemSize);
}
} else { // non-indexed cases
if (usedCount * stride > maxSize) {
throw DeadlyImportError("GLTF: count*stride ", (usedCount * stride), " > maxSize ", maxSize, " in ", getContextForErrorMessages(id, name));
}
if (stride == elemSize && targetElemSize == elemSize) {
memcpy(outData, data, totalSize);
} else {
for (size_t i = 0; i < usedCount; ++i) {
memcpy(outData + i, data + i * stride, elemSize);
}
}
}
return usedCount;
}

24
code/AssetLib/glTF2/glTF2Importer.cpp
View File

@ -454,7 +454,6 @@ void glTF2Importer::ImportMeshes(glTF2::Asset &r) {
meshOffsets.clear();
const unsigned int unusedIndex = ~0;
std::vector<unsigned int> usedVertexIndices;
std::vector<unsigned int> reverseMappingIndices;
std::vector<unsigned int> indexBuffer;
@ -470,14 +469,14 @@ void glTF2Importer::ImportMeshes(glTF2::Asset &r) {
// extract used vertices:
bool useIndexBuffer = prim.indices;
std::vector<unsigned int>* usedVertexIndicesPtr = nullptr;
std::vector<unsigned int>* vertexRemappingTable = nullptr;
if (useIndexBuffer) {
size_t count = prim.indices->count;
indexBuffer.resize(count);
usedVertexIndices.clear();
reverseMappingIndices.clear();
usedVertexIndices.reserve(count / 3); // this is a very rough heuristic to reduce re-allocations
usedVertexIndicesPtr = &usedVertexIndices;
vertexRemappingTable = &usedVertexIndices;
Accessor::Indexer data = prim.indices->GetIndexer();
if (!data.IsValid()) {
throw DeadlyImportError("GLTF: Invalid accessor without data in mesh ", getContextForErrorMessages(mesh.id, mesh.name));
@ -485,6 +484,7 @@ void glTF2Importer::ImportMeshes(glTF2::Asset &r) {
// Build the vertex remapping table and the modified index buffer (used later instead of the original one)
// In case no index buffer is used, the original vertex arrays are being used so no remapping is required in the first place.
const unsigned int unusedIndex = ~0u;
for (unsigned int i = 0; i < count; ++i) {
unsigned int index = data.GetUInt(i);
if (index >= reverseMappingIndices.size()) {
@ -532,14 +532,14 @@ void glTF2Importer::ImportMeshes(glTF2::Asset &r) {
size_t numAllVertices = 0;
if (!attr.position.empty() && attr.position[0]) {
numAllVertices = attr.position[0]->count;
aim->mNumVertices = static_cast<unsigned int>(attr.position[0]->ExtractData(aim->mVertices, usedVertexIndicesPtr));
aim->mNumVertices = static_cast<unsigned int>(attr.position[0]->ExtractData(aim->mVertices, vertexRemappingTable));
}
if (!attr.normal.empty() && attr.normal[0]) {
if (attr.normal[0]->count != numAllVertices) {
DefaultLogger::get()->warn("Normal count in mesh \"", mesh.name, "\" does not match the vertex count, normals ignored.");
} else {
attr.normal[0]->ExtractData(aim->mNormals, usedVertexIndicesPtr);
attr.normal[0]->ExtractData(aim->mNormals, vertexRemappingTable);
// only extract tangents if normals are present
if (!attr.tangent.empty() && attr.tangent[0]) {
@ -549,7 +549,7 @@ void glTF2Importer::ImportMeshes(glTF2::Asset &r) {
// generate bitangents from normals and tangents according to spec
Tangent *tangents = nullptr;
attr.tangent[0]->ExtractData(tangents, usedVertexIndicesPtr);
attr.tangent[0]->ExtractData(tangents, vertexRemappingTable);
aim->mTangents = new aiVector3D[aim->mNumVertices];
aim->mBitangents = new aiVector3D[aim->mNumVertices];
@ -574,7 +574,7 @@ void glTF2Importer::ImportMeshes(glTF2::Asset &r) {
auto componentType = attr.color[c]->componentType;
if (componentType == glTF2::ComponentType_FLOAT) {
attr.color[c]->ExtractData(aim->mColors[c], usedVertexIndicesPtr);
attr.color[c]->ExtractData(aim->mColors[c], vertexRemappingTable);
} else {
if (componentType == glTF2::ComponentType_UNSIGNED_BYTE) {
aim->mColors[c] = GetVertexColorsForType<unsigned char>(attr.color[c]);
@ -595,7 +595,7 @@ void glTF2Importer::ImportMeshes(glTF2::Asset &r) {
continue;
}
attr.texcoord[tc]->ExtractData(aim->mTextureCoords[tc], usedVertexIndicesPtr);
attr.texcoord[tc]->ExtractData(aim->mTextureCoords[tc], vertexRemappingTable);
aim->mNumUVComponents[tc] = attr.texcoord[tc]->GetNumComponents();
aiVector3D *values = aim->mTextureCoords[tc];
@ -624,7 +624,7 @@ void glTF2Importer::ImportMeshes(glTF2::Asset &r) {
ASSIMP_LOG_WARN("Positions of target ", i, " in mesh \"", mesh.name, "\" does not match the vertex count");
} else {
aiVector3D *positionDiff = nullptr;
target.position[0]->ExtractData(positionDiff, usedVertexIndicesPtr);
target.position[0]->ExtractData(positionDiff, vertexRemappingTable);
for (unsigned int vertexId = 0; vertexId < aim->mNumVertices; vertexId++) {
aiAnimMesh.mVertices[vertexId] += positionDiff[vertexId];
}
@ -636,7 +636,7 @@ void glTF2Importer::ImportMeshes(glTF2::Asset &r) {
ASSIMP_LOG_WARN("Normals of target ", i, " in mesh \"", mesh.name, "\" does not match the vertex count");
} else {
aiVector3D *normalDiff = nullptr;
target.normal[0]->ExtractData(normalDiff, usedVertexIndicesPtr);
target.normal[0]->ExtractData(normalDiff, vertexRemappingTable);
for (unsigned int vertexId = 0; vertexId < aim->mNumVertices; vertexId++) {
aiAnimMesh.mNormals[vertexId] += normalDiff[vertexId];
}
@ -651,10 +651,10 @@ void glTF2Importer::ImportMeshes(glTF2::Asset &r) {
ASSIMP_LOG_WARN("Tangents of target ", i, " in mesh \"", mesh.name, "\" does not match the vertex count");
} else {
Tangent *tangent = nullptr;
attr.tangent[0]->ExtractData(tangent, usedVertexIndicesPtr);
attr.tangent[0]->ExtractData(tangent, vertexRemappingTable);
aiVector3D *tangentDiff = nullptr;
target.tangent[0]->ExtractData(tangentDiff, usedVertexIndicesPtr);
target.tangent[0]->ExtractData(tangentDiff, vertexRemappingTable);
for (unsigned int vertexId = 0; vertexId < aim->mNumVertices; ++vertexId) {
tangent[vertexId].xyz += tangentDiff[vertexId];