55     return (a->x * b->x + a->y * b->y + a->z * b->z);  in VDot()
59     c->x = (a->y * b->z) - (a->z * b->y);  in VCross()
60     c->y = (a->z * b->x) - (a->x * b->z);  in VCross()
61     c->z = (a->x * b->y) - (a->y * b->x);  in VCross()
65     return (flt)sqrt((a->x * a->x) + (a->y * a->y) + (a->z * a->z));  in VLength()
71     len = sqrt((a->x * a->x) + (a->y * a->y) + (a->z * a->z));  in VNorm()
74         a->y /= len;  in VNorm()
81     c->y = (a->y + b->y);  in VAdd()
87     c->y = (a->y - b->y);  in VSub()
93     C->y = (a * A->y) + B->y;  in VAddS()
101     temp.y = a->o.y + (a->d.y * t);  in Raypnt()
109     a->y *= s;  in VScale()