Alan Hickman fahickman

fahickman / Occluder classification from camera region.cpp

Last active July 12, 2021 21:18

	// This assumes the occluder AABB and camera position are in the same space.
	// You can either then transform the planes into world space, or transform the
	// box verts and camera pos into world space before building the planes, but
	// after finding the silhouette.
	int makeOccluderPlanes(Vec4 planes[9], Vec3 bmin, Vec3 bmax, Vec3 camPos)
	{
	static const uint8_t s_silhouettes[43][6] = {
	{ }, // 0
	{ 0, 4, 6, 2 }, // 1: -x
	{ 1, 3, 7, 5 }, // 2: +x

fahickman / AABB of a disc

Created April 28, 2015 01:39

	void discAabb(Vec3 minOut, Vec3 maxOut, Vec3 center, Vec3 normal, float radius)
	{
	Vec3 half;
	float x2 = normal.x * normal.x;
	float y2 = normal.y * normal.y;
	float z2 = normal.z * normal.z;

	half.x = radius * sqrtf(y2 + z2);
	half.y = radius * sqrtf(z2 + x2);
	half.z = radius * sqrtf(x2 + y2);

fahickman / matrices.html

Created April 10, 2020 18:21

	<!DOCTYPE html>
	<html>
	<head>
	<script type="text/javascript" async
	src="https://cdnjs.cloudflare.com/ajax/libs/mathjax/2.7.7/MathJax.js?config=TeX-MML-AM_CHTML">
	</script>
	</head>
	<body>
	\[\begin{matrix}
	& \textit{Non-Parity} & \textit{Inverse} & \textit{Parity} & \textit{Inverse} \\

fahickman / Volition Programmer Test 2003.txt

Created March 10, 2021 20:16

	Volition, Inc. Programmer's Test
	Created: October 12, 1999
	Last Revision: Tuesday, January 7, 2003 (MWA)

	Please attempt all questions on this test. Type your answers immediately
	after the questions. If you are unable to solve a problem, typing your
	thoughts as you attempt the problem is useful.

	There are eleven questions on this test. If you get stuck on one, move to the
	next one. Please be sure that you completely understand the problem