RTCFormat - specifies format of data in buffers
#include <embree3/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_FLAGS = 32 };
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_FLAGS can get used to add additional flag per primitive of a geometry, and is currently only used for linear curves.
[rtcSetGeometryBuffer], [rtcSetSharedGeometryBuffer], [rtcSetNewGeometryBuffer]