Function translate2D

packages/engine/Source/Scene/ScreenSpaceCameraController.js:989–1008

(controller, startPosition, movement)

const scratchTranslateP0 = new Cartesian3();

function translate2D(controller, startPosition, movement) {
  const scene = controller._scene;
  const camera = scene.camera;
  let start = camera.getPickRay(
    movement.startPosition,
    translate2DStart,
  ).origin;
  let end = camera.getPickRay(movement.endPosition, translate2DEnd).origin;

  start = Cartesian3.fromElements(start.y, start.z, start.x, start);
  end = Cartesian3.fromElements(end.y, end.z, end.x, end);

  const direction = Cartesian3.subtract(start, end, scratchTranslateP0);
  const distance = Cartesian3.magnitude(direction);

  if (distance > 0.0) {
    Cartesian3.normalize(direction, direction);
    camera.move(direction, distance);
  }
}

function zoom2D(controller, startPosition, movement) {
  if (defined(movement.distance)) {