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Computing Camera Rays

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Christoph Peters

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Description

Computing Camera Rays is a technical blog article by Christoph Peters.

Blog post deriving camera-ray origin, direction, and far-plane length from a world-to-clip matrix so primary rays match rasterization for perspective and orthographic cameras. Explains catastrophic cancellation in the naive far-minus-near direction and presents a plane-intersection approach with GLSL listings. Aimed at graphics programmers building hybrid or fully ray-traced primary visibility.

It is aimed at advanced graphics programmers and matches the audience implied by Christoph Peters's other work.

The article is a free HTML blog post meant to be read in one sitting, with diagrams or code snippets embedded in the page.

It is useful when you want practical detail beyond a title or store listing and prefer primary-source explanation from the author or maintainer.