Function _glslEUCM

src/shaders/undistortion.ts:896–900

(p: Vec2, i: CameraIntrinsics)

// Mirrors distortEUCM().
function _glslEUCM(p: Vec2, i: CameraIntrinsics): Vec2 {
  const r2  = p.x * p.x + p.y * p.y;
  const den = i.alpha * Math.sqrt(i.beta * r2 + 1.0) + (1.0 - i.alpha);
  return { x: p.x / den, y: p.y / den };
}

/**
 * TS transcription of the fragment-shader `applyDistortion()` active path,