RAY_CCS_SIZE
#define RAY_GET_INDEX(ccs) (((ccs) - RAY_CCS_BASE) / RAY_CCS_SIZE)
#define RAY_GET_CCS(i) (RAY_CCS_BASE + (i) * RAY_CCS_SIZE)
for (i = 0; i < RAY_CCS_LAST; ccs += RAY_CCS_SIZE, i++)