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()
75         a->z /= len;  in VNorm()
82     c->z = (a->z + b->z);  in VAdd()
88     c->z = (a->z - b->z);  in VSub()
94     C->z = (a * A->z) + B->z;  in VAddS()
102     temp.z = a->o.z + (a->d.z * t);  in Raypnt()
110     a->z *= s;  in VScale()