92     VSub(&g->max, &g->min, &g->voxsize);  in newgrid()
93     g->voxsize.x /= (flt)g->xsize;  in newgrid()
94     g->voxsize.y /= (flt)g->ysize;  in newgrid()
95     g->voxsize.z /= (flt)g->zsize;  in newgrid()
190     cellmax.x = cellmin.x + g->voxsize.x;  in cellbound()
191     cellmax.y = cellmin.y + g->voxsize.y;  in cellbound()
192     cellmax.z = cellmin.z + g->voxsize.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()
499         tdelta.x = g->voxsize.x / -ry->d.x;  in grid_intersect()
504         tdelta.x = g->voxsize.x / ry->d.x;  in grid_intersect()
518         tdelta.y = g->voxsize.y / -ry->d.y;  in grid_intersect()
523         tdelta.y = g->voxsize.y / ry->d.y;  in grid_intersect()
537         tdelta.z = g->voxsize.z / -ry->d.z;  in grid_intersect()
542         tdelta.z = g->voxsize.z / ry->d.z;  in grid_intersect()