         OVR_ASSERT ( fabs ( DistortionFnInverse ( sampleR[0] ) - DistortionFnInverseApprox ( sampleR[0] ) ) / maxR < 0.0000f );         OVR_ASSERT ( fabs ( DistortionFnInverse ( sampleR[0] ) - DistortionFnInverseApprox ( sampleR[0] ) ) / maxR < 0.0000f );         OVR_ASSERT ( fabs ( DistortionFnInverse ( sampleR[0] ) - DistortionFnInverseApprox ( sampleR[0] ) ) / maxR < 0.0000f );         OVR_ASSERT ( fabs ( DistortionFnInverse ( sampleR[0] ) - DistortionFnInverseApprox ( sampleR[0] ) ) / maxR < 0.0000f );         