///=====================================================
///
///=====================================================
const Matrix4 MatrixStack::PopMatrix(){
if (m_stack.empty()) return Matrix4();
const Matrix4 temp(m_stack.top());
m_totalTransformation.TransformByMatrix(temp.GetInverse());
m_stack.pop();
return temp;
}
void PolygonGroup::ApplyMatrix(const Matrix4 & matrix)
{
aabbox = AABBox3(); // reset bbox
Matrix4 normalMatrix4;
matrix.GetInverse(normalMatrix4);
normalMatrix4.Transpose();
Matrix3 normalMatrix3;
normalMatrix3 = normalMatrix4;
for (int32 vi = 0; vi < vertexCount; ++vi)
{
Vector3 vertex;
GetCoord(vi, vertex);
vertex = vertex * matrix;
SetCoord(vi, vertex);
Vector3 normal;
GetNormal(vi, normal);
normal = normal * normalMatrix3;
SetNormal(vi, normal);
}
}