Function removeMotionPathPointInScript

packages/parsers/src/gsapParser.ts:2997–3016

(
  script: string,
  animationId: string,
  index: number,
)

 * out-of-range index, cubic paths, or a 2-point path.
 */
export function removeMotionPathPointInScript(
  script: string,
  animationId: string,
  index: number,
): string {
  const loc = locateAnimation(script, animationId);
  if (!loc) return script;
  const anim = loc.target.animation;
  if (!anim.arcPath?.enabled || hasCubicSegments(anim.arcPath.segments)) return script;

  const waypoints = extractArcWaypoints(anim);
  if (waypoints.length <= 2 || index < 0 || index >= waypoints.length) return script;

  const segments = [...anim.arcPath.segments];
  waypoints.splice(index, 1);
  // Drop the segment on the side that still exists (last anchor → preceding segment).
  segments.splice(Math.min(index, segments.length - 1), 1);

  return writeMotionPathValue(loc, waypoints, segments, anim.arcPath.autoRotate);
}

/**
 * Author a fresh 2-anchor motionPath tween on a target element: a straight line