70 object *newtri(void *tex, vector v0, vector v1, vector v2) {  in newtri()  argument
75     VSub(&v2, &v0, &edge2);  in newtri()
76     VSub(&v2, &v1, &edge3);  in newtri()
97 object *newstri(void *tex, vector v0, vector v1, vector v2, vector n0, vector n1, vector n2) {  in newstri()  argument
102     VSub(&v2, &v0, &edge2);  in newstri()
103     VSub(&v2, &v1, &edge3);  in newstri()
127 #define CROSS(dest, v1, v2)             \  argument
128     dest.x = v1.y * v2.z - v1.z * v2.y; \
129     dest.y = v1.z * v2.x - v1.x * v2.z; \
130     dest.z = v1.x * v2.y - v1.y * v2.x;
132 #define DOT(v1, v2) (v1.x * v2.x + v1.y * v2.y + v1.z * v2.z)  argument
134 #define SUB(dest, v1, v2) \  argument
135     dest.x = v1.x - v2.x; \
136     dest.y = v1.y - v2.y; \
137     dest.z = v1.z - v2.z;
141     vector v1, v2;  in tri_bbox()  local
144     VAdd(&t->v0, &t->edge2, &v2);  in tri_bbox()
146     min->x = MYMIN(t->v0.x, MYMIN(v1.x, v2.x));  in tri_bbox()
147     min->y = MYMIN(t->v0.y, MYMIN(v1.y, v2.y));  in tri_bbox()
148     min->z = MYMIN(t->v0.z, MYMIN(v1.z, v2.z));  in tri_bbox()
150     max->x = MYMAX(t->v0.x, MYMAX(v1.x, v2.x));  in tri_bbox()
151     max->y = MYMAX(t->v0.y, MYMAX(v1.y, v2.y));  in tri_bbox()
152     max->z = MYMAX(t->v0.z, MYMAX(v1.z, v2.z));  in tri_bbox()