Hi,

These are the normals and distances of the planes that define the 3D viewing
volume. Where is the origin of these vectors? Is it in the middle of the
projection plane?


const VECTOR VIEW_VX1 = {-0.8944271910, 0.0, -0.4472135955};
const VECTOR VIEW_VX2 = { 0.8944271910, 0.0, -0.4472135955};
const VECTOR VIEW_VY1 = {0.0, -0.8944271910, -0.4472135955};
const VECTOR VIEW_VY2 = {0.0,  0.8944271910, -0.4472135955};
const DBL VIEW_DX1 = 0.4472135955;
const DBL VIEW_DX2 = 0.4472135955;
const DBL VIEW_DY1 = 0.4472135955;
const DBL VIEW_DY2 = 0.4472135955;

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