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IVRSystem::ComputeDistortion

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Joe Ludwig edited this page Apr 21, 2015 · 2 revisions

DistortionCoordinates_t ComputeDistortion( Hmd_Eye eEye, float fU, float fV )

Returns a single distortion value for use in a distortion map. Input UVs are in a single eye's viewport, and output UVs are for the source render target in the distortion shader.

  • eEye - Eye_Left or Eye_Right. Determines which eye the function should return the distortion value for.
  • fU - horizontal texture coordinate for the output pixel within the viewport
  • fV - vertical texture coordinate for the output pixel within the viewport

ComputeDistortion returns distortion values using the following structure: struct DistortionCoordinates_t { float rfRed[2]; float rfGreen[2]; float rfBlue[2]; };

rfRed contains the UVs for the red channel, rfGreen contains the UVs for the green channel, and rfBlue contains the UVs for the blue channel.

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