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Frustum
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terminology
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+0/0 (terminology) - Frustum
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terminology
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1.
Perspective Frustum and Normalized Device Coordinates (NDC)
2.
In perspective projection, a 3D point in a truncated pyramid frustum (eye coordinates) is mapped to a cube (NDC); the range of x-coordinate from [l, r] to [-1, 1], the y-coordinate from [b, t] to [-1, 1] and the z-coordinate from [-n, -f] to [-1, 1].