setFromUnitVectors method
Quaternion
setFromUnitVectors(
- Vector3 v1,
- Vector3 v2
Set Quant from v1
and v2
Implementation
Quaternion setFromUnitVectors(Vector3 v1, Vector3 v2 ) {
final vx = Vector3.zero();
double r = v1.dot( v2 ) + 1;
if ( r < Math.eps2 ) {
r = 0;
if (v1.x.abs() >v1.z.abs() ){ vx.setValues( - v1.y, v1.x, 0 );}
else{ vx.setValues( 0, - v1.z, v1.y );}
}
else {
vx.cross2( v1, v2 );
}
x = vx.x;
y = vx.y;
z = vx.z;
w = r;
normalize();
return this;
}