lygia/v1.2.0/math/rotate3dZ)returns a 3x3 rotation matrix
Use:
rotate3dZ(<float> radians)
#ifndef FNC_ROTATE3DZ
#define FNC_ROTATE3DZ
mat3 rotate3dZ(in float r){
return mat3(vec3(cos(r),-sin(r),0.),
vec3(sin(r),cos(r),0.),
vec3(0.,0.,1.));
}
#endif
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