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Added [Sub]Mesh::GetTriangleCount()

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Former-commit-id: e365bd3aa57d487186a0be5cde1d5b0ba78d740c
This commit is contained in:
Lynix
2013-04-01 14:33:10 +02:00
parent a951736338
commit 2f72939ad0
4 changed files with 49 additions and 0 deletions
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30
src/Nazara/Utility/SubMesh.cpp
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@@ -151,6 +151,36 @@ nzPrimitiveType NzSubMesh::GetPrimitiveType() const
return m_primitiveType;
}
unsigned int NzSubMesh::GetTriangleCount() const
{
const NzIndexBuffer* indexBuffer = GetIndexBuffer();
unsigned int indexCount;
if (indexBuffer)
indexCount = indexBuffer->GetIndexCount();
else
indexCount = GetVertexCount();
switch (m_primitiveType)
{
case nzPrimitiveType_LineList:
case nzPrimitiveType_LineStrip:
case nzPrimitiveType_PointList:
return 0;
case nzPrimitiveType_TriangleFan:
return (indexCount - 1) / 2;
case nzPrimitiveType_TriangleList:
return indexCount / 3;
case nzPrimitiveType_TriangleStrip:
return indexCount - 2;
}
NazaraError("Primitive type not handled (0x" + NzString::Number(m_primitiveType, 16) + ')');
return 0;
}
unsigned int NzSubMesh::GetMaterialIndex() const
{
return m_matIndex;