OptixSRTMotionTransform Struct Reference

#include <optix_types.h>

Public Attributes
OptixTraversableHandle	child
OptixMotionOptions	motionOptions
unsigned int	pad [3]
OptixSRTData	srtData [2]

Detailed Description

Represents an SRT motion transformation.

The device address of instances of this type must be a multiple of OPTIX_TRANSFORM_BYTE_ALIGNMENT.

This struct, as defined here, handles only N=2 motion keys due to the fixed array length of its srtData member. The following example shows how to create instances for an arbitrary number N of motion keys:

OptixSRTData srtData[N];
... // setup srtData
 
size_t transformSizeInBytes = sizeof( OptixSRTMotionTransform ) + ( N-2 ) * sizeof( OptixSRTData );
OptixSRTMotionTransform* srtMotionTransform = (OptixSRTMotionTransform*) malloc( transformSizeInBytes );
memset( srtMotionTransform, 0, transformSizeInBytes );
 
... // setup other members of srtMotionTransform
srtMotionTransform->motionOptions.numKeys   = N;
memcpy( srtMotionTransform->srtData, srtData, N * sizeof( OptixSRTData ) );
 
... // copy srtMotionTransform to device memory
free( srtMotionTransform )

See also

optixConvertPointerToTraversableHandle()

Member Data Documentation

child

OptixTraversableHandle OptixSRTMotionTransform::child

The traversable transformed by this transformation.

motionOptions

OptixMotionOptions OptixSRTMotionTransform::motionOptions

The motion options for this transformation Must have at least two motion keys.

pad

unsigned int OptixSRTMotionTransform::pad[3]

Padding to make the SRT data 16 byte aligned.

srtData

OptixSRTData OptixSRTMotionTransform::srtData[2]

The actual SRT data describing the transformation.