private Vector4 ToEyeCoords(Vector4 clipCoords)
{
Matrix4 invertedProjection = Matrix4.Invert(ProjectionMatrix);
Vector4 eyeCoords = Vector4.Transform(clipCoords, invertedProjection);
return(new Vector4(eyeCoords.X, eyeCoords.Y, 1.0f, 0.0f));
}
private Vector3 ToWorldCoords(Vector4 eyeCoords)
{
Matrix4 invertedView = Matrix4.Invert(VievMatrix);
Vector4 rayWorld = Vector4.Transform(eyeCoords, invertedView);
Vector3 mouseRay = new Vector3(rayWorld.Xyz);
mouseRay.Normalize();
return(mouseRay);
}
/// <summary>
/// Calcola il centro del "view cuboid" in light space e po lo converte in world space
/// </summary>
/// <returns>il cento dek view cuboid in world space</returns>
public Vector3 GetCenter()
{
float x = (minX + maxX) / 2f;
float y = (minY + maxY) / 2f;
float z = (minZ + maxZ) / 2f;
Vector4 cen = new Vector4(x, y, z, 1);
Matrix4 invertedLight = new Matrix4();
if (lightViewMatrix.Determinant != 0)
{
Matrix4.Invert(ref lightViewMatrix, out invertedLight);
}
return(new Vector3(Vector4.Transform(cen, invertedLight)));
}