70 object *newtri(void *tex, vector v0, vector v1, vector v2) {  in newtri()  argument
74     VSub(&v1, &v0, &edge1);  in newtri()
75     VSub(&v2, &v0, &edge2);  in newtri()
87         t->v0 = v0;  in newtri()
97 object *newstri(void *tex, vector v0, vector v1, vector v2, vector n0, vector n1, vector n2) {  in newstri()  argument
101     VSub(&v1, &v0, &edge1);  in newstri()
102     VSub(&v2, &v0, &edge2);  in newstri()
114         t->v0 = v0;  in newstri()
143     VAdd(&t->v0, &t->edge1, &v1);  in tri_bbox()
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()
173     SUB(tvec, ry->o, trn->v0);  in tri_intersect()
213     VSUB((*pnt), trn->v0, P);  in stri_normal()