54 flt VDot(vector *a, vector *b) {  in VDot()
58 void VCross(vector *a, vector *b, vector *c) {  in VCross()
64 flt VLength(vector *a) {  in VLength()
68 void VNorm(vector *a) {  in VNorm()
79 void VAdd(vector *a, vector *b, vector *c) {  in VAdd()
85 void VSub(vector *a, vector *b, vector *c) {  in VSub()
91 void VAddS(flt a, vector *A, vector *B, vector *C) {  in VAddS()
97 vector Raypnt(ray *a, flt t) {  in Raypnt()
107 void VScale(vector *a, flt s) {  in VScale()
113 void ColorAddS(color *a, color *b, flt s) {  in ColorAddS()
119 void ColorAccum(color *a, color *b) {  in ColorAccum()
125 void ColorScale(color *a, flt s) {  in ColorScale()