22 lines
No EOL
706 B
GLSL
22 lines
No EOL
706 B
GLSL
#include "type.glsl"
|
|
|
|
/*
|
|
contributors: Patricio Gonzalez Vivo
|
|
description: 'Quaternion multiplication. Based on http://mathworld.wolfram.com/Quaternion.html'
|
|
use: <QUAT> quatMul(<QUAT> a, <QUAT> b)
|
|
license:
|
|
- Copyright (c) 2021 Patricio Gonzalez Vivo under Prosperity License - https://prosperitylicense.com/versions/3.0.0
|
|
- Copyright (c) 2021 Patricio Gonzalez Vivo under Patron License - https://lygia.xyz/license
|
|
*/
|
|
|
|
#ifndef FNC_QUATMUL
|
|
#define FNC_QUATMUL
|
|
QUAT quatMul(QUAT q1, QUAT q2) {
|
|
return QUAT(
|
|
q2.xyz * q1.w + q1.xyz * q2.w + cross(q1.xyz, q2.xyz),
|
|
q1.w * q2.w - dot(q1.xyz, q2.xyz)
|
|
);
|
|
}
|
|
|
|
QUAT quatMul(QUAT q, float s) { return QUAT(q.xyz * s, q.w * s); }
|
|
#endif |