rtcGetGeometryTransformEx - returns the interpolated instance transformation for an instance of an instance array geometry for the specified time.
#include <embree4/rtcore.h> void rtcGetGeometryTransformEx( RTCGeometry geometry, unsigned int instPrimID, float time, enum RTCFormat format, void* xfm );
The rtcGetGeometryTransformEx function returns the interpolated local to world transformation (xfm parameter) of the instPrimID-th instance of an instance array geometry (geometry parameter) for a particular time (time parameter in range [0, 1]) in the specified format (format parameter). The function can also be used when geometry refers to a regular instance, but then the instPrimID has to be 0.
Possible formats for the returned matrix are:
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RTC_FORMAT_FLOAT3X4_ROW_MAJOR: The 3×4 float matrix is laid out in row-major form. | ||
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RTC_FORMAT_FLOAT3X4_COLUMN_MAJOR: The 3×4 float matrix is laid out in column-major form. | ||
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RTC_FORMAT_FLOAT4X4_COLUMN_MAJOR: The 3×4 float matrix is laid out in column-major form as a 4×4 homogeneous matrix with last row equal to (0, 0, 0, 1). |
On failure an error code is set that can be queried using rtcGetDeviceError.
[RTC_GEOMETRY_TYPE_INSTANCE_ARRAY]