Builds a translation matrix that flattens geometry into a plane, useful for creating shadow maps.

Return Dword = DX11 BUILD SHADOW MATRIX(vec4ShadowPlane, vec4LightPosition, [resultMatrix])

vec4ShadowPlane

Dword
A vector4 describing the shadow plane .

vec4LightPosition

Float
A vector4 describing the position of the light which produces said shadows. If the w component is 0, the light is handled as a directional light, if 1 it represents a point light.

[Optional] resultMatrix

Dword
The matrix to write the created translation matrix to. Can be omitted, in which case a temporary matrix holding the generated translation matrix will be returned.

The resultMatrix, if one was provided, or a newly created temporary matrix holding the resulting matrix otherwise.

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