88     r->z = p->z + q->z;  in C_QUATAdd()
144     r->z = p->z - q->z;  in C_QUATSubtract()
211     r->w = p->w*q->w - p->x*q->x - p->y*q->y - p->z*q->z;  in C_QUATMultiply()
212     r->x = p->w*q->x + p->x*q->w + p->y*q->z - p->z*q->y;  in C_QUATMultiply()
213     r->y = p->w*q->y + p->y*q->w + p->z*q->x - p->x*q->z;  in C_QUATMultiply()
214     r->z = p->w*q->z + p->z*q->w + p->x*q->y - p->y*q->x;  in C_QUATMultiply()
316     r->z = q->z * scale;  in C_QUATScale()
365     return (q->x*p->x + q->y*p->y + q->z*p->z + q->w*p->w);  in C_QUATDotProduct()
415     mag = (src->x * src->x) + (src->y * src->y) + (src->z * src->z) + (src->w * src->w);  in C_QUATNormalize()
423         unit->z = src->z * mag;  in C_QUATNormalize()
428         unit->x = unit->y = unit->z = unit->w = 0.0F;      in C_QUATNormalize()
506     mag = ( src->x*src->x + src->y*src->y + src->z*src->z + src->w*src->w );  in C_QUATInverse()
517     inv->z = -src->z * norminv;  in C_QUATInverse()
654     theta = sqrtf( q->x*q->x + q->y*q->y + q->z*q->z );  in C_QUATExp()
662     r->z = scale * q->z;  in C_QUATExp()
684     scale = q->x*q->x + q->y*q->y + q->z*q->z;  in C_QUATLogN()
690         mag = scale + q->z*q->z;  in C_QUATLogN()
706     r->z = scale*q->z;  in C_QUATLogN()
731     dot =  q->x*qto->x + q->y*qto->y + q->z*qto->z + q->w*qto->w;  in C_QUATMakeClosest()
737         r->z = -q->z;  in C_QUATMakeClosest()
774     r->z = sh * nAxis.z;  in C_QUATRotAxisRad()
807         r->z = (m[1][0] - m[0][1]) * s;  in C_QUATMtx()
828         r->z = q[2];  in C_QUATMtx()
853     r->z = t * ( q->z - p->z ) + p->z;  in C_QUATLerp()
878     cos_th = p->x * q->x + p->y * q->y + p->z * q->z + p->w * q->w;  in C_QUATSlerp()
903     r->z = tp * p->z + tq * q->z;  in C_QUATSlerp()