rtcIntersect4/8/16(3)

  NAME

    rtcIntersect4/8/16 - finds the closest hits for a ray packet

  SYNOPSIS

    #include <embree4/rtcore.h>

    void rtcIntersect4(
      const int* valid,
      RTCScene scene,
      struct RTCRayHit4* rayhit,
      struct RTCIntersectArguments* args = NULL
    );

    void rtcIntersect8(
      const int* valid,
      RTCScene scene,
      struct RTCRayHit8* rayhit,
      struct RTCIntersectArguments* args = NULL
    );

    void rtcIntersect16(
      const int* valid,
      RTCScene scene,
      struct RTCRayHit16* rayhit,
      struct RTCIntersectArguments* args = NULL
    );

  DESCRIPTION

The rtcIntersect4/8/16 functions finds the closest hits for a ray packet of size 4, 8, or 16 (rayhit argument) with the scene (scene argument). The ray/hit input contains a ray packet and hit packet. The passed optional arguments struct (args argument) are used to pass additional arguments for advanced features. See Section [rtcIntersect1] for more details and a description of how to set up and trace rays.

A ray valid mask must be provided (valid argument) which stores one 32-bit integer (-1 means valid and 0 invalid) per ray in the packet. Only active rays are processed, and hit data of inactive rays is not changed.

For rtcIntersect4 the ray packet must be aligned to 16 bytes, for rtcIntersect8 the alignment must be 32 bytes, and for rtcIntersect16 the alignment must be 64 bytes.

The rtcIntersect4, rtcIntersect8 and rtcIntersect16 functions may change the ray packet size and ray order when calling back into filter functions or user geometry callbacks. Under some conditions the application can assume packets to stay intakt, which can determined by querying the RTC_DEVICE_PROPERTY_NATIVE_RAY4_SUPPORTED, RTC_DEVICE_PROPERTY_NATIVE_RAY8_SUPPORTED, RTC_DEVICE_PROPERTY_NATIVE_RAY16_SUPPORTED properties through the rtcGetDeviceProperty function. See [rtcGetDeviceProperty] for more information.

  EXIT STATUS

For performance reasons this function does not do any error checks, thus will not set any error flags on failure.

  SEE ALSO

[rtcIntersect1], [rtcOccluded4/8/16], [rtcInitIntersectArguments]