Man page - rtchit(3)

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Package: libembree-dev
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Manual

RTCHit

NAME
SYNOPSIS
DESCRIPTION
EXIT STATUS
SEE ALSO

NAME

RTCHit - single hit structure

SYNOPSIS

#include <embree4/rtcore.h>

struct RTCHit
{
  float Ng_x;                                        // x coordinate of geometry normal
  float Ng_y;                                        // y coordinate of geometry normal
  float Ng_z;                                        // z coordinate of geometry normal

  float u;                                           // barycentric u coordinate of hit
  float v;                                           // barycentric v coordinate of hit


  unsigned int primID;                               // geometry ID
  unsigned int geomID;                               // primitive ID
  unsigned int instID[RTC_MAX_INSTANCE_LEVEL_COUNT]; // instance ID
};

DESCRIPTION

The RTCHit type defines the type of a ray/primitive intersection result. The hit contains the unnormalized geometric normal in object space at the hit location ( Ng_x , Ng_y , Ng_z members), the barycentric u/v coordinates of the hit ( u and v members), as well as the primitive ID ( primID member), geometry ID ( geomID member), and instance ID stack ( instID member) of the hit. The parametric intersection distance is not stored inside the hit, but stored inside the tfar member of the ray.

The embree4/rtcore_ray.h header additionally defines the same hit structure in structure of array (SOA) layout for hit packets of size 4 ( RTCHit4 type), size 8 ( RTCHit8 type), and size 16 ( RTCHit16 type). The header additionally defines an RTCHitNt template for hit packets of an arbitrary compile-time size.