66     sphere *s;  in newsphere()  local
68     s = (sphere *)rt_getmem(sizeof(sphere));  in newsphere()
69     memset(s, 0, sizeof(sphere));  in newsphere()
70     s->methods = &sphere_methods;  in newsphere()
72     s->tex = (texture *)tex;  in newsphere()
73     s->ctr = ctr;  in newsphere()
74     s->rad = rad;  in newsphere()
76     return (object *)s;  in newsphere()
80     sphere *s = (sphere *)obj;  in sphere_bbox()  local
82     min->x = s->ctr.x - s->rad;  in sphere_bbox()
83     min->y = s->ctr.y - s->rad;  in sphere_bbox()
84     min->z = s->ctr.z - s->rad;  in sphere_bbox()
85     max->x = s->ctr.x + s->rad;  in sphere_bbox()
86     max->y = s->ctr.y + s->rad;  in sphere_bbox()
87     max->z = s->ctr.z + s->rad;  in sphere_bbox()