RTC_GEOMETRY_TYPE_TRIANGLE - Online Linux Manual PageSection : 3
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Note : Embree Ray Tracing Kernels 3

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NAME RTC_GEOMETRY_TYPE_TRIANGLE − triangle geometry type

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SYNOPSIS #include <embree3/rtcore.h> RTCGeometry geometry =   rtcNewGeometry(device, RTC_GEOMETRY_TYPE_TRIANGLE);

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DESCRIPTIONTriangle meshes are created by passing RTC_GEOMETRY_TYPE_TRIANGLE to the rtcNewGeometry function call. The triangle indices can be specified by setting an index buffer (RTC_BUFFER_TYPE_INDEX type) and the triangle vertices by setting a vertex buffer (RTC_BUFFER_TYPE_VERTEX type). See rtcSetGeometryBuffer and rtcSetSharedGeometryBuffer for more details on how to set buffers. The index buffer must contain an array of three 32−bit indices per triangle (RTC_FORMAT_UINT3 format) and the number of primitives is inferred from the size of that buffer. The vertex buffer must contain an array of single precision x, y, z floating point coordinates (RTC_FORMAT_FLOAT3 format), and the number of vertices are inferred from the size of that buffer. The vertex buffer can be at most 16 GB large. The parametrization of a triangle uses the first vertex p0 as base point, the vector p1 − p0 as u−direction and the vector p2 − p0 as v−direction. Thus vertex attributes t0,t1,t2 can be linearly interpolated over the triangle the following way: t_uv = (1−u−v)*t0 + u*t1 + v*t2      = t0 + u*(t1−t0) + v*(t2−t0) A triangle whose vertices are laid out counter−clockwise has its geometry normal pointing upwards outside the front face, like illustrated in the following picture: For multi−segment motion blur, the number of time steps must be first specified using the rtcSetGeometryTimeStepCount call. Then a vertex buffer for each time step can be set using different buffer slots, and all these buffers have to have the same stride and size. Also see tutorial [Triangle Geometry] for an example of how to create triangle meshes.

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EXIT STATUSOn failure NULL is returned and an error code is set that be get queried using rtcGetDeviceError.

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SEE ALSO[rtcNewGeometry] 0

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Online Linux Manual Page   :   Version   :   Online Linux Manual Page - Fedora.40 - march=x86-64 - mtune=generic - 24.12.05
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