Photon enum:
47 enum
48 {
49 NO_HIT = 0x1 << 0,
50 BULK_ABSORB = 0x1 << 1,
51 SURFACE_DETECT = 0x1 << 2,
52 SURFACE_ABSORB = 0x1 << 3,
53 RAYLEIGH_SCATTER = 0x1 << 4,
54 REFLECT_DIFFUSE = 0x1 << 5,
55 REFLECT_SPECULAR = 0x1 << 6,
56 SURFACE_REEMIT = 0x1 << 7,
57 SURFACE_TRANSMIT = 0x1 << 8,
58 BULK_REEMIT = 0x1 << 9,
59 NAN_ABORT = 0x1 << 31
60 }; // processes