sbtdef.h

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#pragma once
 
#include "device_types.h"
#include "optix_types.h"
#include "type.h"
#include <string>
#include <tuple>
 
enum SBTType {
    INTERSECTS_ANY,
    INTERSECTS_FIRST,
    INTERSECTS_CLOSEST,
    INTERSECTS_COUNT,
    INTERSECTS_LOCATION,
    count
};
 
// if the function contains such program
using ProgramMask = int;
// ray generation
#define PRG_RG 1
// intersection
#define PRG_IS 1 << 1
// anyhit
#define PRG_AH 1 << 2
// closest hit
#define PRG_CH 1 << 3
// miss
#define PRG_MS 1 << 4
// direct callable
#define PRG_DC 1 << 5
// continuation callable
#define PRG_CC 1 << 6
// exception
#define PRG_EX 1 << 7
 
const std::tuple<std::string, ProgramMask> programInfos[] = {
    {"intersectsAny", PRG_RG | PRG_AH | PRG_MS},
    {"intersectsFirst", PRG_RG | PRG_CH | PRG_MS},
    {"intersectsClosest", PRG_RG | PRG_CH | PRG_MS},
    {"intersectsCount", PRG_RG | PRG_AH},
    {"intersectsLocation", PRG_RG | PRG_AH}};
 
template <typename T> struct SBTRecord {
    __align__(
        OPTIX_SBT_RECORD_ALIGNMENT) char header[OPTIX_SBT_RECORD_HEADER_SIZE];
    T data;
};
 
using SBTRecordEmpty = SBTRecord<void *>;