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2. Parametric form of a ray | Rendering | Computer animation | Khan Academy

Introduces the parametric equation of a ray, expressing any point along its path as a starting point plus a direction scaled by a variable. This is the exact formula a renderer runs millions of times per frame.

Khan Academy Labs · 3 min · Advanced · VFX · VFX · 2016

What you take away

Write the parametric equation of a ray and identify each of its variables.

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