https://jpcharalambosh.co/tags/culling/ Recent content in Culling on blog https://jpcharalambosh.co/papermod-cover.png https://jpcharalambosh.co/papermod-cover.png Hugo en Sat, 25 Apr 2026 15:00:00 -0500 https://jpcharalambosh.co/posts/visibility_testing/ Sat, 25 Apr 2026 15:00:00 -0500 https://jpcharalambosh.co/posts/visibility_testing/ <blockquote> <p>Per-object frustum culling with <a href="https://github.com/VisualComputing/p5.tree#visibility-testing"><code>visibility</code></a>. Sixty mixed primitives drift around in a wide volume; each frame their bounds — AABBs for boxes, spheres for spheres — are tested against a fixed test camera&rsquo;s frustum, with the six frustum planes pre-computed once per frame via <a href="https://github.com/VisualComputing/p5.tree#visibility-testing"><code>bounds({ mat4Eye })</code></a>. Three return states drive the render: solid lit material for <code>VISIBLE</code>, amber wireframe for <code>SEMIVISIBLE</code> (the bounds straddle a plane), faint grey for <code>INVISIBLE</code>. Toggle the test camera&rsquo;s projection between perspective and orthographic with the gold checkbox; drag to orbit the observer and watch the cyan wireframe stay put while objects drift through it.</p>