Function hitTestPoint

web/js/sparse_track_editor.js:318–331

(node, canvasPos)

// ---------------------------------------------------------------------------

function hitTestPoint(node, canvasPos) {
  const ed = node._ed;
  const dpr = window.devicePixelRatio || 1;
  const tol = HIT_TOLERANCE * dpr;
  for (let si = 0; si < ed.splines.length; si++) {
    for (let pi = 0; pi < ed.splines[si].length; pi++) {
      const cp = imgToCanvas(node, ed.splines[si][pi]);
      if (dist(cp, canvasPos) < tol) {
        return { si, pi };
      }
    }
  }
  return null;
}

// ---------------------------------------------------------------------------
// Context menu