RTCSETGEOMETRYTRANSFORM(3embree3)

💖 rtcSetGeometryTransform — bestie edition 💖

okay so this is a page from the Embree Ray Tracing Kernels 3 manual, section 3, and it's all about rtcSetGeometryTransform. pull up a chair, we're gonna slay this 🫶

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✨ NAME ✨

rtcSetGeometryTransform — sets the transformation for a particular time step of an instance geometry

yes bestie that's literally it, she does one thing and she does it iconically 💅

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🌸 SYNOPSIS 🌸

#include <embree3/rtcore.h>

void rtcSetGeometryTransform(
  RTCGeometry geometry,
  unsigned int timeStep,
  enum RTCFormat format,
  const float* xfm
);

look at her. four little params. main character energy fr fr ✨

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🦋 DESCRIPTION 🦋

so the rtcSetGeometryTransform function sets the local-to-world affine transformation (that's the xfm parameter, bestie) of an instance geometry (that's the geometry parameter) for a particular time step (that's the timeStep parameter). 🎀

the transformation is specified as a 3×4 matrix — which is a 3×3 linear transformation plus translation, no cap — and the following formats (the format parameter) are supported:

• RTC_FORMAT_FLOAT3X4_ROW_MAJOR — the 3×4 float matrix is laid out in row-major form. 🌈
• RTC_FORMAT_FLOAT3X4_COLUMN_MAJOR — the 3×4 float matrix is laid out in column-major form. 🌈
• RTC_FORMAT_FLOAT4X4_COLUMN_MAJOR — the 3×4 float matrix is laid out in column-major form as a 4×4 homogeneous matrix with the last row being equal to (0, 0, 0, 1). 🌈

like... pick your format, pick your layout, we don't judge. all three are valid. periodt. 💜

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💀 EXIT STATUS 💀

on failure an error code is set that can be queried using rtcGetDeviceError.

so if something goes sideways, don't just sit there looking cute — go ask rtcGetDeviceError what happened. she'll tell you. 😭

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👑 SEE ALSO 👑

• [RTC_GEOMETRY_TYPE_INSTANCE]

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and that's the whole vibe bestie — this is from the Embree Ray Tracing Kernels 3 manual, rtcSetGeometryTransform(3), the one and only. go forth and transform your instances, you absolute icon 💖✨🎀🦋🌸💅🫶🔥🌈⭐💜