RTCBufferType(3)

  NAME

    RTCFormat - specifies format of data in buffers

  SYNOPSIS

    #include <embree4/rtcore_ray.h>

    enum RTCBufferType
    {
      RTC_BUFFER_TYPE_INDEX            = 0,
      RTC_BUFFER_TYPE_VERTEX           = 1,
      RTC_BUFFER_TYPE_VERTEX_ATTRIBUTE = 2,
      RTC_BUFFER_TYPE_NORMAL           = 3,
      RTC_BUFFER_TYPE_TANGENT          = 4,
      RTC_BUFFER_TYPE_NORMAL_DERIVATIVE = 5,

      RTC_BUFFER_TYPE_GRID                 = 8,

      RTC_BUFFER_TYPE_FACE                 = 16,
      RTC_BUFFER_TYPE_LEVEL                = 17,
      RTC_BUFFER_TYPE_EDGE_CREASE_INDEX    = 18,
      RTC_BUFFER_TYPE_EDGE_CREASE_WEIGHT   = 19,
      RTC_BUFFER_TYPE_VERTEX_CREASE_INDEX  = 20,
      RTC_BUFFER_TYPE_VERTEX_CREASE_WEIGHT = 21,
      RTC_BUFFER_TYPE_HOLE                 = 22,

      RTC_BUFFER_TYPE_TRANSFORM            = 23,

      RTC_BUFFER_TYPE_FLAGS = 32
    };

  DESCRIPTION

The RTBufferType structure defines slots to assign data buffers to using the [rtcSetGeometryBuffer], [rtcSetSharedGeometryBuffer], and [rtcSetNewGeometryBuffer] API calls.

For most geometry types the RTC_BUFFER_TYPE_INDEX slot is used to assign an index buffer, while the RTC_BUFFER_TYPE_VERTEX is used to assign the corresponding vertex buffer.

The RTC_BUFFER_TYPE_VERTEX_ATTRIBUTE slot can get used to assign arbitrary additional vertex data which can get interpolated using the [rtcInterpolate] API call.

The RTC_BUFFER_TYPE_NORMAL, RTC_BUFFER_TYPE_TANGENT, and RTC_BUFFER_TYPE_NORMAL_DERIVATIVE are special buffers required to assign per vertex normals, tangents, and normal derivatives for some curve types.

The RTC_BUFFER_TYPE_GRID buffer is used to assign the grid primitive buffer for grid geometries (see [RTC_GEOMETRY_TYPE_GRID]).

The RTC_BUFFER_TYPE_FACE, RTC_BUFFER_TYPE_LEVEL, RTC_BUFFER_TYPE_EDGE_CREASE_INDEX, RTC_BUFFER_TYPE_EDGE_CREASE_WEIGHT, RTC_BUFFER_TYPE_VERTEX_CREASE_INDEX, RTC_BUFFER_TYPE_VERTEX_CREASE_WEIGHT, and RTC_BUFFER_TYPE_HOLE are special buffers required to create subdivision meshes (see [RTC_GEOMETRY_TYPE_SUBDIVISION]).

The RTC_BUFFER_TYPE_TRANSFORM buffer is used to provide instance transformation information for instance array geometries (see [RTC_GEOMETRY_TYPE_INSTANCE_ARRAY]).

The RTC_BUFFER_TYPE_FLAGS can get used to add additional flag per primitive of a geometry, and is currently only used for linear curves.

  EXIT STATUS

  SEE ALSO

[rtcSetGeometryBuffer], [rtcSetSharedGeometryBuffer], [rtcSetNewGeometryBuffer]