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IVRSystem::ComputeDistortion

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Ryan Speets edited this page Feb 27, 2017 · 2 revisions

bool ComputeDistortion( Hmd_Eye eEye, float fU, float fV, DistortionCoordinates_t *pDistortionCoordinates )

Gets the result of 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.

Returns true for success. False indicates values are unsuitable.

  • 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
  • DistortionCoordinates_t *pDistortionCoordinates - The struct to be updated with the distortion values

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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