Created
March 26, 2019 23:39
-
-
Save dghez/c7be8decfb155da6f822356db10c2bf1 to your computer and use it in GitHub Desktop.
Rotate on a specific axe
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
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, | |
0.0, 0.0, 0.0, 1.0); | |
} | |
vec3 rotate(vec3 v, vec3 axis, float angle) { | |
mat4 m = rotationMatrix(axis, angle); | |
return (m * vec4(v, 1.0)).xyz; | |
} |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment