76 object *newgrid(int xsize, int ysize, int zsize, vector min, vector max) {  in newgrid()  argument
89     g->min = min;  in newgrid()
92     VSub(&g->max, &g->min, &g->voxsize);  in newgrid()
105 static int grid_bbox(void *obj, vector *min, vector *max) {  in grid_bbox()  argument
108     *min = g->min;  in grid_bbox()
140     vector min, max;  in globalbound()  local
155         min.x = -FHUGE;  in globalbound()
156         min.y = -FHUGE;  in globalbound()
157         min.z = -FHUGE;  in globalbound()
162         if (cur->methods->bbox((void *)cur, &min, &max)) {  in globalbound()
163             gmin->x = MYMIN(gmin->x, min.x);  in globalbound()
164             gmin->y = MYMIN(gmin->y, min.y);  in globalbound()
165             gmin->z = MYMIN(gmin->z, min.z);  in globalbound()
177     vector min, max, cellmin, cellmax;  in cellbound()  local
202         min.x = -FHUGE;  in cellbound()
203         min.y = -FHUGE;  in cellbound()
204         min.z = -FHUGE;  in cellbound()
209         if (cur->obj->methods->bbox((void *)cur->obj, &min, &max)) {  in cellbound()
210             if ((min.x >= cellmin.x) && (max.x <= cellmax.x) && (min.y >= cellmin.y) &&  in cellbound()
211                 (max.y <= cellmax.y) && (min.z >= cellmin.z) && (max.z <= cellmax.z)) {  in cellbound()
212                 cmin->x = MYMIN(cmin->x, min.x);  in cellbound()
213                 cmin->y = MYMIN(cmin->y, min.y);  in cellbound()
214                 cmin->z = MYMIN(cmin->z, min.z);  in cellbound()
447     index->x = (int)((pos->x - g->min.x) / g->voxsize.x);  in pos2grid()
448     index->y = (int)((pos->y - g->min.y) / g->voxsize.y);  in pos2grid()
449     index->z = (int)((pos->z - g->min.z) / g->voxsize.z);  in pos2grid()
462     if (pos->x < g->min.x || pos->x > g->max.x || pos->y < g->min.y || pos->y > g->max.y ||  in pos2grid()
463         pos->z < g->min.z || pos->z > g->max.z)  in pos2grid()
641         if ((ry->o.x < g->min.x) || (ry->o.x > g->max.x))  in grid_bounds_intersect()
645         tx1 = (g->min.x - ry->o.x) / ry->d.x;  in grid_bounds_intersect()
663         if ((ry->o.y < g->min.y) || (ry->o.y > g->max.y))  in grid_bounds_intersect()
667         ty1 = (g->min.y - ry->o.y) / ry->d.y;  in grid_bounds_intersect()
685         if ((ry->o.z < g->min.z) || (ry->o.z > g->max.z))  in grid_bounds_intersect()
689         tz1 = (g->min.z - ry->o.z) / ry->d.z;  in grid_bounds_intersect()