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Fix CMeshBuffer::append reallocating too eagerly (#14969)

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Desour 2024-08-14 21:34:15 +02:00 committed by SmallJoker
parent 53c2fbb4c4
commit a6f1242a11
1 changed files with 10 additions and 5 deletions
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15
irr/include/CMeshBuffer.h
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@ -170,16 +170,21 @@ public:
return; return;
const u32 vertexCount = getVertexCount(); const u32 vertexCount = getVertexCount();
u32 i;
Vertices.reallocate(vertexCount + numVertices); // Only reallocate if there are enough new vertices. Otherwise append()
for (i = 0; i < numVertices; ++i) { // will be slow when called in a loop.
if (vertexCount + numVertices > Vertices.allocated_size() * 3 / 2)
Vertices.reallocate(vertexCount + numVertices);
for (u32 i = 0; i < numVertices; ++i) {
Vertices.push_back(static_cast<const T *>(vertices)[i]); Vertices.push_back(static_cast<const T *>(vertices)[i]);
BoundingBox.addInternalPoint(static_cast<const T *>(vertices)[i].Pos); BoundingBox.addInternalPoint(static_cast<const T *>(vertices)[i].Pos);
} }
Indices.reallocate(getIndexCount() + numIndices); if (getIndexCount() + numIndices > Indices.allocated_size() * 3 / 2)
for (i = 0; i < numIndices; ++i) { Indices.reallocate(getIndexCount() + numIndices);
for (u32 i = 0; i < numIndices; ++i) {
Indices.push_back(indices[i] + vertexCount); Indices.push_back(indices[i] + vertexCount);
} }
} }