assertivist
/ geom.py
Last active
July 27, 2023 02:59
A tiny library to create primitive procedural geometry in Panda3d - Apache 2.0 license
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| """ | |
| Copyright 2021 D. Watson, J. Voss, R. Herriman, A. Halstead | |
| Licensed under the Apache License, Version 2.0 (the "License"); | |
| you may not use this file except in compliance with the License. | |
| You may obtain a copy of the License at | |
| http://www.apache.org/licenses/LICENSE-2.0 | |
| Unless required by applicable law or agreed to in writing, software |
neilmendoza
/ gist:4512992
Last active
June 9, 2023 14:22
Function to return matrix for rotation about an arbitrary axis in GLSL.
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| mat4 rotationMatrix(vec3 axis, float angle) | |
| { | |
| axis = normalize(axis); | |
| float s = sin(angle); | |
| float c = cos(angle); | |
| float oc = 1.0 - c; | |
| return mat4(oc * axis.x * axis.x + c, oc * axis.x * axis.y - axis.z * s, oc * axis.z * axis.x + axis.y * s, 0.0, | |
| oc * axis.x * axis.y + axis.z * s, oc * axis.y * axis.y + c, oc * axis.y * axis.z - axis.x * s, 0.0, | |
| oc * axis.z * axis.x - axis.y * s, oc * axis.y * axis.z + axis.x * s, oc * axis.z * axis.z + c, 0.0, |