computeNormal method

void computeNormal()

Implementation

void computeNormal() {
	final vA = v1?.position;
	final vB = v2?.position;
	final vC = v3?.position;

	_cb.sub2( vC!, vB! );
	_ab.sub2( vA!, vB );
	_cb.cross( _ab ).normalize();

	normal.setFrom( _cb );
}