Platform SDK: DirectX |
The D3DMATRIX type describes a matrix for such methods as Direct3DDevice7.MultiplyTransform, Direct3DDevice7.GetTransform, and Direct3DDevice7.SetTransform.
Type D3DMATRIX rc11 As Single rc12 As Single rc13 As Single rc14 As Single rc21 As Single rc22 As Single rc23 As Single rc24 As Single rc31 As Single rc32 As Single rc33 As Single rc34 As Single rc41 As Single rc42 As Single rc43 As Single rc44 As Single End Type
In Direct3D, the rc34 element of a projection matrix cannot be a negative number. If your application needs to use a negative value in this location, it should scale the entire projection matrix by -1, instead.
Direct3DDevice7.MultiplyTransform, Direct3DDevice7.GetTransform, and Direct3DDevice7.SetTransform