bytev-charts-beta/lib/plugin/three.js/examples/js/controls/OrbitControls.js

基于echarts和JavaScript及ES6封装的一个可以直接调用的图表组件库，内置主题设计，简单快捷，且支持用户自定义配置； npm 安装方式: npm install bytev-charts 若启动提示还需额外install插件,则运行 npm install @babel/runtime-corejs2 即可;

import _Object$create from "@babel/runtime-corejs2/core-js/object/create";
import "core-js/modules/es.array.iterator.js";
import "core-js/modules/es.object.to-string.js";
import "core-js/modules/web.dom-collections.iterator.js";
import "core-js/modules/es.string.sub.js";
console.warn("THREE.OrbitControls: As part of the transition to ES6 Modules, the files in 'examples/js' were deprecated in May 2020 (r117) and will be deleted in December 2020 (r124). You can find more information about developing using ES6 Modules in https://threejs.org/docs/#manual/en/introduction/Installation."); // This set of controls performs orbiting, dollying (zooming), and panning.
// Unlike TrackballControls, it maintains the "up" direction object.up (+Y by default).
//
//    Orbit - left mouse / touch: one-finger move
//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
//    Pan - right mouse, or left mouse + ctrl/meta/shiftKey, or arrow keys / touch: two-finger move

THREE.OrbitControls = function (object, domElement) {
  if (domElement === undefined) console.warn('THREE.OrbitControls: The second parameter "domElement" is now mandatory.');
  if (domElement === document) console.error('THREE.OrbitControls: "document" should not be used as the target "domElement". Please use "renderer.domElement" instead.');
  this.object = object;
  this.domElement = domElement; // Set to false to disable this control

  this.enabled = true; // "target" sets the location of focus, where the object orbits around

  this.target = new THREE.Vector3(); // How far you can dolly in and out ( PerspectiveCamera only )

  this.minDistance = 0;
  this.maxDistance = Infinity; // How far you can zoom in and out ( OrthographicCamera only )

  this.minZoom = 0;
  this.maxZoom = Infinity; // How far you can orbit vertically, upper and lower limits.
  // Range is 0 to Math.PI radians.

  this.minPolarAngle = 0; // radians

  this.maxPolarAngle = Math.PI; // radians
  // How far you can orbit horizontally, upper and lower limits.
  // If set, the interval [ min, max ] must be a sub-interval of [ - 2 PI, 2 PI ], with ( max - min < 2 PI )

  this.minAzimuthAngle = -Infinity; // radians

  this.maxAzimuthAngle = Infinity; // radians
  // Set to true to enable damping (inertia)
  // If damping is enabled, you must call controls.update() in your animation loop

  this.enableDamping = false;
  this.dampingFactor = 0.05; // This option actually enables dollying in and out; left as "zoom" for backwards compatibility.
  // Set to false to disable zooming

  this.enableZoom = true;
  this.zoomSpeed = 1.0; // Set to false to disable rotating

  this.enableRotate = true;
  this.rotateSpeed = 1.0; // Set to false to disable panning

  this.enablePan = true;
  this.panSpeed = 1.0;
  this.screenSpacePanning = true; // if false, pan orthogonal to world-space direction camera.up

  this.keyPanSpeed = 7.0; // pixels moved per arrow key push
  // Set to true to automatically rotate around the target
  // If auto-rotate is enabled, you must call controls.update() in your animation loop

  this.autoRotate = false;
  this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60
  // Set to false to disable use of the keys

  this.enableKeys = true; // The four arrow keys

  this.keys = {
    LEFT: 37,
    UP: 38,
    RIGHT: 39,
    BOTTOM: 40
  }; // Mouse buttons

  this.mouseButtons = {
    LEFT: THREE.MOUSE.ROTATE,
    MIDDLE: THREE.MOUSE.DOLLY,
    RIGHT: THREE.MOUSE.PAN
  }; // Touch fingers

  this.touches = {
    ONE: THREE.TOUCH.ROTATE,
    TWO: THREE.TOUCH.DOLLY_PAN
  }; // for reset

  this.target0 = this.target.clone();
  this.position0 = this.object.position.clone();
  this.zoom0 = this.object.zoom; //
  // public methods
  //

  this.getPolarAngle = function () {
    return spherical.phi;
  };

  this.getAzimuthalAngle = function () {
    return spherical.theta;
  };

  this.saveState = function () {
    scope.target0.copy(scope.target);
    scope.position0.copy(scope.object.position);
    scope.zoom0 = scope.object.zoom;
  };

  this.reset = function () {
    scope.target.copy(scope.target0);
    scope.object.position.copy(scope.position0);
    scope.object.zoom = scope.zoom0;
    scope.object.updateProjectionMatrix();
    scope.dispatchEvent(changeEvent);
    scope.update();
    state = STATE.NONE;
  }; // this method is exposed, but perhaps it would be better if we can make it private...


  this.update = function () {
    var offset = new THREE.Vector3(); // so camera.up is the orbit axis

    var quat = new THREE.Quaternion().setFromUnitVectors(object.up, new THREE.Vector3(0, 1, 0));
    var quatInverse = quat.clone().inverse();
    var lastPosition = new THREE.Vector3();
    var lastQuaternion = new THREE.Quaternion();
    var twoPI = 2 * Math.PI;
    return function update() {
      var position = scope.object.position;
      offset.copy(position).sub(scope.target); // rotate offset to "y-axis-is-up" space

      offset.applyQuaternion(quat); // angle from z-axis around y-axis

      spherical.setFromVector3(offset);

      if (scope.autoRotate && state === STATE.NONE) {
        rotateLeft(getAutoRotationAngle());
      }

      if (scope.enableDamping) {
        spherical.theta += sphericalDelta.theta * scope.dampingFactor;
        spherical.phi += sphericalDelta.phi * scope.dampingFactor;
      } else {
        spherical.theta += sphericalDelta.theta;
        spherical.phi += sphericalDelta.phi;
      } // restrict theta to be between desired limits


      var min = scope.minAzimuthAngle;
      var max = scope.maxAzimuthAngle;

      if (isFinite(min) && isFinite(max)) {
        if (min < -Math.PI) min += twoPI;else if (min > Math.PI) min -= twoPI;
        if (max < -Math.PI) max += twoPI;else if (max > Math.PI) max -= twoPI;

        if (min < max) {
          spherical.theta = Math.max(min, Math.min(max, spherical.theta));
        } else {
          spherical.theta = spherical.theta > (min + max) / 2 ? Math.max(min, spherical.theta) : Math.min(max, spherical.theta);
        }
      } // restrict phi to be between desired limits


      spherical.phi = Math.max(scope.minPolarAngle, Math.min(scope.maxPolarAngle, spherical.phi));
      spherical.makeSafe();
      spherical.radius *= scale; // restrict radius to be between desired limits

      spherical.radius = Math.max(scope.minDistance, Math.min(scope.maxDistance, spherical.radius)); // move target to panned location

      if (scope.enableDamping === true) {
        scope.target.addScaledVector(panOffset, scope.dampingFactor);
      } else {
        scope.target.add(panOffset);
      }

      offset.setFromSpherical(spherical); // rotate offset back to "camera-up-vector-is-up" space

      offset.applyQuaternion(quatInverse);
      position.copy(scope.target).add(offset);
      scope.object.lookAt(scope.target);

      if (scope.enableDamping === true) {
        sphericalDelta.theta *= 1 - scope.dampingFactor;
        sphericalDelta.phi *= 1 - scope.dampingFactor;
        panOffset.multiplyScalar(1 - scope.dampingFactor);
      } else {
        sphericalDelta.set(0, 0, 0);
        panOffset.set(0, 0, 0);
      }

      scale = 1; // update condition is:
      // min(camera displacement, camera rotation in radians)^2 > EPS
      // using small-angle approximation cos(x/2) = 1 - x^2 / 8

      if (zoomChanged || lastPosition.distanceToSquared(scope.object.position) > EPS || 8 * (1 - lastQuaternion.dot(scope.object.quaternion)) > EPS) {
        scope.dispatchEvent(changeEvent);
        lastPosition.copy(scope.object.position);
        lastQuaternion.copy(scope.object.quaternion);
        zoomChanged = false;
        return true;
      }

      return false;
    };
  }();

  this.dispose = function () {
    scope.domElement.removeEventListener('contextmenu', onContextMenu, false);
    scope.domElement.removeEventListener('mousedown', onMouseDown, false);
    scope.domElement.removeEventListener('wheel', onMouseWheel, false);
    scope.domElement.removeEventListener('touchstart', onTouchStart, false);
    scope.domElement.removeEventListener('touchend', onTouchEnd, false);
    scope.domElement.removeEventListener('touchmove', onTouchMove, false);
    scope.domElement.ownerDocument.removeEventListener('mousemove', onMouseMove, false);
    scope.domElement.ownerDocument.removeEventListener('mouseup', onMouseUp, false);
    scope.domElement.removeEventListener('keydown', onKeyDown, false); //scope.dispatchEvent( { type: 'dispose' } ); // should this be added here?
  }; //
  // internals
  //


  var scope = this;
  var changeEvent = {
    type: 'change'
  };
  var startEvent = {
    type: 'start'
  };
  var endEvent = {
    type: 'end'
  };
  var STATE = {
    NONE: -1,
    ROTATE: 0,
    DOLLY: 1,
    PAN: 2,
    TOUCH_ROTATE: 3,
    TOUCH_PAN: 4,
    TOUCH_DOLLY_PAN: 5,
    TOUCH_DOLLY_ROTATE: 6
  };
  var state = STATE.NONE;
  var EPS = 0.000001; // current position in spherical coordinates

  var spherical = new THREE.Spherical();
  var sphericalDelta = new THREE.Spherical();
  var scale = 1;
  var panOffset = new THREE.Vector3();
  var zoomChanged = false;
  var rotateStart = new THREE.Vector2();
  var rotateEnd = new THREE.Vector2();
  var rotateDelta = new THREE.Vector2();
  var panStart = new THREE.Vector2();
  var panEnd = new THREE.Vector2();
  var panDelta = new THREE.Vector2();
  var dollyStart = new THREE.Vector2();
  var dollyEnd = new THREE.Vector2();
  var dollyDelta = new THREE.Vector2();

  function getAutoRotationAngle() {
    return 2 * Math.PI / 60 / 60 * scope.autoRotateSpeed;
  }

  function getZoomScale() {
    return Math.pow(0.95, scope.zoomSpeed);
  }

  function rotateLeft(angle) {
    sphericalDelta.theta -= angle;
  }

  function rotateUp(angle) {
    sphericalDelta.phi -= angle;
  }

  var panLeft = function () {
    var v = new THREE.Vector3();
    return function panLeft(distance, objectMatrix) {
      v.setFromMatrixColumn(objectMatrix, 0); // get X column of objectMatrix

      v.multiplyScalar(-distance);
      panOffset.add(v);
    };
  }();

  var panUp = function () {
    var v = new THREE.Vector3();
    return function panUp(distance, objectMatrix) {
      if (scope.screenSpacePanning === true) {
        v.setFromMatrixColumn(objectMatrix, 1);
      } else {
        v.setFromMatrixColumn(objectMatrix, 0);
        v.crossVectors(scope.object.up, v);
      }

      v.multiplyScalar(distance);
      panOffset.add(v);
    };
  }(); // deltaX and deltaY are in pixels; right and down are positive


  var pan = function () {
    var offset = new THREE.Vector3();
    return function pan(deltaX, deltaY) {
      var element = scope.domElement;

      if (scope.object.isPerspectiveCamera) {
        // perspective
        var position = scope.object.position;
        offset.copy(position).sub(scope.target);
        var targetDistance = offset.length(); // half of the fov is center to top of screen

        targetDistance *= Math.tan(scope.object.fov / 2 * Math.PI / 180.0); // we use only clientHeight here so aspect ratio does not distort speed

        panLeft(2 * deltaX * targetDistance / element.clientHeight, scope.object.matrix);
        panUp(2 * deltaY * targetDistance / element.clientHeight, scope.object.matrix);
      } else if (scope.object.isOrthographicCamera) {
        // orthographic
        panLeft(deltaX * (scope.object.right - scope.object.left) / scope.object.zoom / element.clientWidth, scope.object.matrix);
        panUp(deltaY * (scope.object.top - scope.object.bottom) / scope.object.zoom / element.clientHeight, scope.object.matrix);
      } else {
        // camera neither orthographic nor perspective
        console.warn('WARNING: OrbitControls.js encountered an unknown camera type - pan disabled.');
        scope.enablePan = false;
      }
    };
  }();

  function dollyOut(dollyScale) {
    if (scope.object.isPerspectiveCamera) {
      scale /= dollyScale;
    } else if (scope.object.isOrthographicCamera) {
      scope.object.zoom = Math.max(scope.minZoom, Math.min(scope.maxZoom, scope.object.zoom * dollyScale));
      scope.object.updateProjectionMatrix();
      zoomChanged = true;
    } else {
      console.warn('WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.');
      scope.enableZoom = false;
    }
  }

  function dollyIn(dollyScale) {
    if (scope.object.isPerspectiveCamera) {
      scale *= dollyScale;
    } else if (scope.object.isOrthographicCamera) {
      scope.object.zoom = Math.max(scope.minZoom, Math.min(scope.maxZoom, scope.object.zoom / dollyScale));
      scope.object.updateProjectionMatrix();
      zoomChanged = true;
    } else {
      console.warn('WARNING: OrbitControls.js encountered an unknown camera type - dolly/zoom disabled.');
      scope.enableZoom = false;
    }
  } //
  // event callbacks - update the object state
  //


  function handleMouseDownRotate(event) {
    rotateStart.set(event.clientX, event.clientY);
  }

  function handleMouseDownDolly(event) {
    dollyStart.set(event.clientX, event.clientY);
  }

  function handleMouseDownPan(event) {
    panStart.set(event.clientX, event.clientY);
  }

  function handleMouseMoveRotate(event) {
    rotateEnd.set(event.clientX, event.clientY);
    rotateDelta.subVectors(rotateEnd, rotateStart).multiplyScalar(scope.rotateSpeed);
    var element = scope.domElement;
    rotateLeft(2 * Math.PI * rotateDelta.x / element.clientHeight); // yes, height

    rotateUp(2 * Math.PI * rotateDelta.y / element.clientHeight);
    rotateStart.copy(rotateEnd);
    scope.update();
  }

  function handleMouseMoveDolly(event) {
    dollyEnd.set(event.clientX, event.clientY);
    dollyDelta.subVectors(dollyEnd, dollyStart);

    if (dollyDelta.y > 0) {
      dollyOut(getZoomScale());
    } else if (dollyDelta.y < 0) {
      dollyIn(getZoomScale());
    }

    dollyStart.copy(dollyEnd);
    scope.update();
  }

  function handleMouseMovePan(event) {
    panEnd.set(event.clientX, event.clientY);
    panDelta.subVectors(panEnd, panStart).multiplyScalar(scope.panSpeed);
    pan(panDelta.x, panDelta.y);
    panStart.copy(panEnd);
    scope.update();
  }

  function
    /*event*/
  handleMouseUp() {// no-op
  }

  function handleMouseWheel(event) {
    if (event.deltaY < 0) {
      dollyIn(getZoomScale());
    } else if (event.deltaY > 0) {
      dollyOut(getZoomScale());
    }

    scope.update();
  }

  function handleKeyDown(event) {
    var needsUpdate = false;

    switch (event.keyCode) {
      case scope.keys.UP:
        pan(0, scope.keyPanSpeed);
        needsUpdate = true;
        break;

      case scope.keys.BOTTOM:
        pan(0, -scope.keyPanSpeed);
        needsUpdate = true;
        break;

      case scope.keys.LEFT:
        pan(scope.keyPanSpeed, 0);
        needsUpdate = true;
        break;

      case scope.keys.RIGHT:
        pan(-scope.keyPanSpeed, 0);
        needsUpdate = true;
        break;
    }

    if (needsUpdate) {
      // prevent the browser from scrolling on cursor keys
      event.preventDefault();
      scope.update();
    }
  }

  function handleTouchStartRotate(event) {
    if (event.touches.length == 1) {
      rotateStart.set(event.touches[0].pageX, event.touches[0].pageY);
    } else {
      var x = 0.5 * (event.touches[0].pageX + event.touches[1].pageX);
      var y = 0.5 * (event.touches[0].pageY + event.touches[1].pageY);
      rotateStart.set(x, y);
    }
  }

  function handleTouchStartPan(event) {
    if (event.touches.length == 1) {
      panStart.set(event.touches[0].pageX, event.touches[0].pageY);
    } else {
      var x = 0.5 * (event.touches[0].pageX + event.touches[1].pageX);
      var y = 0.5 * (event.touches[0].pageY + event.touches[1].pageY);
      panStart.set(x, y);
    }
  }

  function handleTouchStartDolly(event) {
    var dx = event.touches[0].pageX - event.touches[1].pageX;
    var dy = event.touches[0].pageY - event.touches[1].pageY;
    var distance = Math.sqrt(dx * dx + dy * dy);
    dollyStart.set(0, distance);
  }

  function handleTouchStartDollyPan(event) {
    if (scope.enableZoom) handleTouchStartDolly(event);
    if (scope.enablePan) handleTouchStartPan(event);
  }

  function handleTouchStartDollyRotate(event) {
    if (scope.enableZoom) handleTouchStartDolly(event);
    if (scope.enableRotate) handleTouchStartRotate(event);
  }

  function handleTouchMoveRotate(event) {
    if (event.touches.length == 1) {
      rotateEnd.set(event.touches[0].pageX, event.touches[0].pageY);
    } else {
      var x = 0.5 * (event.touches[0].pageX + event.touches[1].pageX);
      var y = 0.5 * (event.touches[0].pageY + event.touches[1].pageY);
      rotateEnd.set(x, y);
    }

    rotateDelta.subVectors(rotateEnd, rotateStart).multiplyScalar(scope.rotateSpeed);
    var element = scope.domElement;
    rotateLeft(2 * Math.PI * rotateDelta.x / element.clientHeight); // yes, height

    rotateUp(2 * Math.PI * rotateDelta.y / element.clientHeight);
    rotateStart.copy(rotateEnd);
  }

  function handleTouchMovePan(event) {
    if (event.touches.length == 1) {
      panEnd.set(event.touches[0].pageX, event.touches[0].pageY);
    } else {
      var x = 0.5 * (event.touches[0].pageX + event.touches[1].pageX);
      var y = 0.5 * (event.touches[0].pageY + event.touches[1].pageY);
      panEnd.set(x, y);
    }

    panDelta.subVectors(panEnd, panStart).multiplyScalar(scope.panSpeed);
    pan(panDelta.x, panDelta.y);
    panStart.copy(panEnd);
  }

  function handleTouchMoveDolly(event) {
    var dx = event.touches[0].pageX - event.touches[1].pageX;
    var dy = event.touches[0].pageY - event.touches[1].pageY;
    var distance = Math.sqrt(dx * dx + dy * dy);
    dollyEnd.set(0, distance);
    dollyDelta.set(0, Math.pow(dollyEnd.y / dollyStart.y, scope.zoomSpeed));
    dollyOut(dollyDelta.y);
    dollyStart.copy(dollyEnd);
  }

  function handleTouchMoveDollyPan(event) {
    if (scope.enableZoom) handleTouchMoveDolly(event);
    if (scope.enablePan) handleTouchMovePan(event);
  }

  function handleTouchMoveDollyRotate(event) {
    if (scope.enableZoom) handleTouchMoveDolly(event);
    if (scope.enableRotate) handleTouchMoveRotate(event);
  }

  function
    /*event*/
  handleTouchEnd() {// no-op
  } //
  // event handlers - FSM: listen for events and reset state
  //


  function onMouseDown(event) {
    if (scope.enabled === false) return; // Prevent the browser from scrolling.

    event.preventDefault(); // Manually set the focus since calling preventDefault above
    // prevents the browser from setting it automatically.

    scope.domElement.focus ? scope.domElement.focus() : window.focus();
    var mouseAction;

    switch (event.button) {
      case 0:
        mouseAction = scope.mouseButtons.LEFT;
        break;

      case 1:
        mouseAction = scope.mouseButtons.MIDDLE;
        break;

      case 2:
        mouseAction = scope.mouseButtons.RIGHT;
        break;

      default:
        mouseAction = -1;
    }

    switch (mouseAction) {
      case THREE.MOUSE.DOLLY:
        if (scope.enableZoom === false) return;
        handleMouseDownDolly(event);
        state = STATE.DOLLY;
        break;

      case THREE.MOUSE.ROTATE:
        if (event.ctrlKey || event.metaKey || event.shiftKey) {
          if (scope.enablePan === false) return;
          handleMouseDownPan(event);
          state = STATE.PAN;
        } else {
          if (scope.enableRotate === false) return;
          handleMouseDownRotate(event);
          state = STATE.ROTATE;
        }

        break;

      case THREE.MOUSE.PAN:
        if (event.ctrlKey || event.metaKey || event.shiftKey) {
          if (scope.enableRotate === false) return;
          handleMouseDownRotate(event);
          state = STATE.ROTATE;
        } else {
          if (scope.enablePan === false) return;
          handleMouseDownPan(event);
          state = STATE.PAN;
        }

        break;

      default:
        state = STATE.NONE;
    }

    if (state !== STATE.NONE) {
      scope.domElement.ownerDocument.addEventListener('mousemove', onMouseMove, false);
      scope.domElement.ownerDocument.addEventListener('mouseup', onMouseUp, false);
      scope.dispatchEvent(startEvent);
    }
  }

  function onMouseMove(event) {
    if (scope.enabled === false) return;
    event.preventDefault();

    switch (state) {
      case STATE.ROTATE:
        if (scope.enableRotate === false) return;
        handleMouseMoveRotate(event);
        break;

      case STATE.DOLLY:
        if (scope.enableZoom === false) return;
        handleMouseMoveDolly(event);
        break;

      case STATE.PAN:
        if (scope.enablePan === false) return;
        handleMouseMovePan(event);
        break;
    }
  }

  function onMouseUp(event) {
    if (scope.enabled === false) return;
    handleMouseUp(event);
    scope.domElement.ownerDocument.removeEventListener('mousemove', onMouseMove, false);
    scope.domElement.ownerDocument.removeEventListener('mouseup', onMouseUp, false);
    scope.dispatchEvent(endEvent);
    state = STATE.NONE;
  }

  function onMouseWheel(event) {
    if (scope.enabled === false || scope.enableZoom === false || state !== STATE.NONE && state !== STATE.ROTATE) return;
    event.preventDefault();
    event.stopPropagation();
    scope.dispatchEvent(startEvent);
    handleMouseWheel(event);
    scope.dispatchEvent(endEvent);
  }

  function onKeyDown(event) {
    if (scope.enabled === false || scope.enableKeys === false || scope.enablePan === false) return;
    handleKeyDown(event);
  }

  function onTouchStart(event) {
    if (scope.enabled === false) return;
    event.preventDefault(); // prevent scrolling

    switch (event.touches.length) {
      case 1:
        switch (scope.touches.ONE) {
          case THREE.TOUCH.ROTATE:
            if (scope.enableRotate === false) return;
            handleTouchStartRotate(event);
            state = STATE.TOUCH_ROTATE;
            break;

          case THREE.TOUCH.PAN:
            if (scope.enablePan === false) return;
            handleTouchStartPan(event);
            state = STATE.TOUCH_PAN;
            break;

          default:
            state = STATE.NONE;
        }

        break;

      case 2:
        switch (scope.touches.TWO) {
          case THREE.TOUCH.DOLLY_PAN:
            if (scope.enableZoom === false && scope.enablePan === false) return;
            handleTouchStartDollyPan(event);
            state = STATE.TOUCH_DOLLY_PAN;
            break;

          case THREE.TOUCH.DOLLY_ROTATE:
            if (scope.enableZoom === false && scope.enableRotate === false) return;
            handleTouchStartDollyRotate(event);
            state = STATE.TOUCH_DOLLY_ROTATE;
            break;

          default:
            state = STATE.NONE;
        }

        break;

      default:
        state = STATE.NONE;
    }

    if (state !== STATE.NONE) {
      scope.dispatchEvent(startEvent);
    }
  }

  function onTouchMove(event) {
    if (scope.enabled === false) return;
    event.preventDefault(); // prevent scrolling

    event.stopPropagation();

    switch (state) {
      case STATE.TOUCH_ROTATE:
        if (scope.enableRotate === false) return;
        handleTouchMoveRotate(event);
        scope.update();
        break;

      case STATE.TOUCH_PAN:
        if (scope.enablePan === false) return;
        handleTouchMovePan(event);
        scope.update();
        break;

      case STATE.TOUCH_DOLLY_PAN:
        if (scope.enableZoom === false && scope.enablePan === false) return;
        handleTouchMoveDollyPan(event);
        scope.update();
        break;

      case STATE.TOUCH_DOLLY_ROTATE:
        if (scope.enableZoom === false && scope.enableRotate === false) return;
        handleTouchMoveDollyRotate(event);
        scope.update();
        break;

      default:
        state = STATE.NONE;
    }
  }

  function onTouchEnd(event) {
    if (scope.enabled === false) return;
    handleTouchEnd(event);
    scope.dispatchEvent(endEvent);
    state = STATE.NONE;
  }

  function onContextMenu(event) {
    if (scope.enabled === false) return;
    event.preventDefault();
  } //


  scope.domElement.addEventListener('contextmenu', onContextMenu, false);
  scope.domElement.addEventListener('mousedown', onMouseDown, false);
  scope.domElement.addEventListener('wheel', onMouseWheel, false);
  scope.domElement.addEventListener('touchstart', onTouchStart, false);
  scope.domElement.addEventListener('touchend', onTouchEnd, false);
  scope.domElement.addEventListener('touchmove', onTouchMove, false);
  scope.domElement.addEventListener('keydown', onKeyDown, false); // make sure element can receive keys.

  if (scope.domElement.tabIndex === -1) {
    scope.domElement.tabIndex = 0;
  } // force an update at start


  this.update();
};

THREE.OrbitControls.prototype = _Object$create(THREE.EventDispatcher.prototype);
THREE.OrbitControls.prototype.constructor = THREE.OrbitControls; // This set of controls performs orbiting, dollying (zooming), and panning.
// Unlike TrackballControls, it maintains the "up" direction object.up (+Y by default).
// This is very similar to OrbitControls, another set of touch behavior
//
//    Orbit - right mouse, or left mouse + ctrl/meta/shiftKey / touch: two-finger rotate
//    Zoom - middle mouse, or mousewheel / touch: two-finger spread or squish
//    Pan - left mouse, or arrow keys / touch: one-finger move

THREE.MapControls = function (object, domElement) {
  THREE.OrbitControls.call(this, object, domElement);
  this.screenSpacePanning = false; // pan orthogonal to world-space direction camera.up

  this.mouseButtons.LEFT = THREE.MOUSE.PAN;
  this.mouseButtons.RIGHT = THREE.MOUSE.ROTATE;
  this.touches.ONE = THREE.TOUCH.PAN;
  this.touches.TWO = THREE.TOUCH.DOLLY_ROTATE;
};

THREE.MapControls.prototype = _Object$create(THREE.EventDispatcher.prototype);
THREE.MapControls.prototype.constructor = THREE.MapControls;