ami-cjs.js/lib/controls/controls.trackballortho.old.js

<p align="center"> <img src="https://cloud.githubusercontent.com/assets/214063/23213764/78ade038-f90c-11e6-8208-4fcade5f3832.png" width="60%"> </p>

'use strict';

/**
 * Original authors from THREEJS repo
 * @author Eberhard Graether / http://egraether.com/
 * @author Mark Lundin  / http://mark-lundin.com
 * @author Patrick Fuller / http://patrick-fuller.com
 * @author Max Smolens / https://github.com/msmolens
 */

THREE.OrthographicTrackballControlsCustom = function (object, domElement) {
  var _this = this;
  var STATE = { NONE: -1, ROTATE: 0, ZOOM: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_ZOOM: 4, TOUCH_PAN: 5, CUSTOM: 99 };

  this.object = object;
  this.domElement = domElement !== undefined ? domElement : document;

  // API

  this.enabled = true;

  this.screen = { left: 0, top: 0, width: 0, height: 0 };

  this.radius = 0;

  this.rotateSpeed = 1.0;
  this.zoomSpeed = 1.2;

  this.noRotate = false;
  this.noZoom = false;
  this.noPan = false;
  this.noRoll = false;
  this.noCustom = false;

  this.forceState = -1;

  this.staticMoving = false;
  this.dynamicDampingFactor = 0.2;

  this.keys = [65 /* A*/, 83 /* S*/, 68];

  // internals

  this.target = new THREE.Vector3();

  var EPS = 0.000001;

  var _changed = true;

  var _state = STATE.NONE,
      _prevState = STATE.NONE,
      _eye = new THREE.Vector3(),
      _rotateStart = new THREE.Vector3(),
      _rotateEnd = new THREE.Vector3(),
      _zoomStart = new THREE.Vector2(),
      _zoomEnd = new THREE.Vector2(),
      _touchZoomDistanceStart = 0,
      _touchZoomDistanceEnd = 0,
      _panStart = new THREE.Vector2(),
      _panEnd = new THREE.Vector2(),
      _customStart = new THREE.Vector2(),
      _customEnd = new THREE.Vector2();

  // for reset

  this.target0 = this.target.clone();
  this.position0 = this.object.position.clone();
  this.up0 = this.object.up.clone();

  this.left0 = this.object.left;
  this.right0 = this.object.right;
  this.top0 = this.object.top;
  this.bottom0 = this.object.bottom;

  // events

  var changeEvent = { type: 'change' };
  var startEvent = { type: 'start' };
  var endEvent = { type: 'end' };

  // methods

  this.handleResize = function () {
    if (this.domElement === document) {
      this.screen.left = 0;
      this.screen.top = 0;
      this.screen.width = window.innerWidth;
      this.screen.height = window.innerHeight;
    } else {
      var box = this.domElement.getBoundingClientRect();
      // adjustments come from similar code in the jquery offset() function
      var d = this.domElement.ownerDocument.documentElement;
      this.screen.left = box.left + window.pageXOffset - d.clientLeft;
      this.screen.top = box.top + window.pageYOffset - d.clientTop;
      this.screen.width = box.width;
      this.screen.height = box.height;
    }

    this.radius = 0.5 * Math.min(this.screen.width, this.screen.height);

    this.left0 = this.object.left;
    this.right0 = this.object.right;
    this.top0 = this.object.top;
    this.bottom0 = this.object.bottom;
  };

  this.handleEvent = function (event) {
    if (typeof this[event.type] == 'function') {
      this[event.type](event);
    }
  };

  var getMouseOnScreen = function () {
    var vector = new THREE.Vector2();

    return function getMouseOnScreen(pageX, pageY) {
      vector.set((pageX - _this.screen.left) / _this.screen.width, (pageY - _this.screen.top) / _this.screen.height);

      return vector;
    };
  }();

  var getMouseProjectionOnBall = function () {
    var vector = new THREE.Vector3();
    var objectUp = new THREE.Vector3();
    var mouseOnBall = new THREE.Vector3();

    return function getMouseProjectionOnBall(pageX, pageY) {
      mouseOnBall.set((pageX - _this.screen.width * 0.5 - _this.screen.left) / _this.radius, (_this.screen.height * 0.5 + _this.screen.top - pageY) / _this.radius, 0.0);

      var length = mouseOnBall.length();

      if (_this.noRoll) {
        if (length < Math.SQRT1_2) {
          mouseOnBall.z = Math.sqrt(1.0 - length * length);
        } else {
          mouseOnBall.z = .5 / length;
        }
      } else if (length > 1.0) {
        mouseOnBall.normalize();
      } else {
        mouseOnBall.z = Math.sqrt(1.0 - length * length);
      }

      _eye.copy(_this.object.position).sub(_this.target);

      vector.copy(_this.object.up).setLength(mouseOnBall.y);
      vector.add(objectUp.copy(_this.object.up).cross(_eye).setLength(mouseOnBall.x));
      vector.add(_eye.setLength(mouseOnBall.z));

      return vector;
    };
  }();

  this.rotateCamera = function () {
    var axis = new THREE.Vector3(),
        quaternion = new THREE.Quaternion();

    return function rotateCamera() {
      var angle = Math.acos(_rotateStart.dot(_rotateEnd) / _rotateStart.length() / _rotateEnd.length());

      if (angle) {
        axis.crossVectors(_rotateStart, _rotateEnd).normalize();

        angle *= _this.rotateSpeed;

        quaternion.setFromAxisAngle(axis, -angle);

        _eye.applyQuaternion(quaternion);
        _this.object.up.applyQuaternion(quaternion);

        _rotateEnd.applyQuaternion(quaternion);

        if (_this.staticMoving) {
          _rotateStart.copy(_rotateEnd);
        } else {
          quaternion.setFromAxisAngle(axis, angle * (_this.dynamicDampingFactor - 1.0));
          _rotateStart.applyQuaternion(quaternion);
        }

        _changed = true;
      }
    };
  }();

  this.zoomCamera = function () {
    if (_state === STATE.TOUCH_ZOOM) {
      var factor = _touchZoomDistanceEnd / _touchZoomDistanceStart;
      _touchZoomDistanceStart = _touchZoomDistanceEnd;

      _this.object.zoom *= factor;

      _changed = true;
    } else {
      var factor = 1.0 + (_zoomEnd.y - _zoomStart.y) * _this.zoomSpeed;

      if (Math.abs(factor - 1.0) > EPS && factor > 0.0) {
        _this.object.zoom /= factor;

        if (_this.staticMoving) {
          _zoomStart.copy(_zoomEnd);
        } else {
          _zoomStart.y += (_zoomEnd.y - _zoomStart.y) * this.dynamicDampingFactor;
        }

        _changed = true;
      }
    }
  };

  this.panCamera = function () {
    var mouseChange = new THREE.Vector2(),
        objectUp = new THREE.Vector3(),
        pan = new THREE.Vector3();

    return function panCamera() {
      mouseChange.copy(_panEnd).sub(_panStart);

      if (mouseChange.lengthSq()) {
        // Scale movement to keep clicked/dragged position under cursor
        var scale_x = (_this.object.right - _this.object.left) / _this.object.zoom;
        var scale_y = (_this.object.top - _this.object.bottom) / _this.object.zoom;
        mouseChange.x *= scale_x;
        mouseChange.y *= scale_y;

        pan.copy(_eye).cross(_this.object.up).setLength(mouseChange.x);
        pan.add(objectUp.copy(_this.object.up).setLength(mouseChange.y));

        _this.object.position.add(pan);
        _this.target.add(pan);

        if (_this.staticMoving) {
          _panStart.copy(_panEnd);
        } else {
          _panStart.add(mouseChange.subVectors(_panEnd, _panStart).multiplyScalar(_this.dynamicDampingFactor));
        }

        _changed = true;
      }
    };
  }();

  this.update = function () {
    _eye.subVectors(_this.object.position, _this.target);

    if (!_this.noRotate) {
      _this.rotateCamera();
    }

    if (!_this.noZoom) {
      _this.zoomCamera();

      if (_changed) {
        _this.object.updateProjectionMatrix();
      }
    }

    if (!_this.noPan) {
      _this.panCamera();
    }

    if (!_this.noCustom) {
      _this.custom(_customStart, _customEnd);
    }

    _this.object.position.addVectors(_this.target, _eye);

    _this.object.lookAt(_this.target);

    if (_changed) {
      _this.dispatchEvent(changeEvent);

      _changed = false;
    }
  };

  this.reset = function () {
    _state = STATE.NONE;
    _prevState = STATE.NONE;

    _this.target.copy(_this.target0);
    _this.object.position.copy(_this.position0);
    _this.object.up.copy(_this.up0);

    _eye.subVectors(_this.object.position, _this.target);

    _this.object.left = _this.left0;
    _this.object.right = _this.right0;
    _this.object.top = _this.top0;
    _this.object.bottom = _this.bottom0;

    _this.object.lookAt(_this.target);

    _this.dispatchEvent(changeEvent);

    _changed = false;
  };

  this.setState = function (targetState) {
    _this.forceState = targetState;
    _prevState = targetState;
    _state = targetState;
  };

  this.custom = function (customStart, customEnd) {};

  // listeners

  function keydown(event) {
    if (_this.enabled === false) return;

    window.removeEventListener('keydown', keydown);

    _prevState = _state;

    if (_state !== STATE.NONE) {
      return;
    } else if (event.keyCode === _this.keys[STATE.ROTATE] && !_this.noRotate) {
      _state = STATE.ROTATE;
    } else if (event.keyCode === _this.keys[STATE.ZOOM] && !_this.noZoom) {
      _state = STATE.ZOOM;
    } else if (event.keyCode === _this.keys[STATE.PAN] && !_this.noPan) {
      _state = STATE.PAN;
    }
  }

  function keyup(event) {
    if (_this.enabled === false) return;

    _state = _prevState;

    window.addEventListener('keydown', keydown, false);
  }

  function mousedown(event) {
    if (_this.enabled === false) return;

    event.preventDefault();
    event.stopPropagation();

    if (_state === STATE.NONE) {
      _state = event.button;
    }

    if (_state === STATE.ROTATE && !_this.noRotate) {
      _rotateStart.copy(getMouseProjectionOnBall(event.pageX, event.pageY));
      _rotateEnd.copy(_rotateStart);
    } else if (_state === STATE.ZOOM && !_this.noZoom) {
      _zoomStart.copy(getMouseOnScreen(event.pageX, event.pageY));
      _zoomEnd.copy(_zoomStart);
    } else if (_state === STATE.PAN && !_this.noPan) {
      _panStart.copy(getMouseOnScreen(event.pageX, event.pageY));
      _panEnd.copy(_panStart);
    } else if (_state === STATE.CUSTOM && !_this.noCustom) {
      _customStart.copy(getMouseOnScreen(event.pageX, event.pageY));
      _customEnd.copy(_panStart);
    }

    document.addEventListener('mousemove', mousemove, false);
    document.addEventListener('mouseup', mouseup, false);

    _this.dispatchEvent(startEvent);
  }

  function mousemove(event) {
    if (_this.enabled === false) return;

    event.preventDefault();
    event.stopPropagation();

    if (_state === STATE.ROTATE && !_this.noRotate) {
      _rotateEnd.copy(getMouseProjectionOnBall(event.pageX, event.pageY));
    } else if (_state === STATE.ZOOM && !_this.noZoom) {
      _zoomEnd.copy(getMouseOnScreen(event.pageX, event.pageY));
    } else if (_state === STATE.PAN && !_this.noPan) {
      _panEnd.copy(getMouseOnScreen(event.pageX, event.pageY));
    } else if (_state === STATE.CUSTOM && !_this.noCustom) {
      _customEnd.copy(getMouseOnScreen(event.pageX, event.pageY));
    }
  }

  function mouseup(event) {
    if (_this.enabled === false) return;

    event.preventDefault();
    event.stopPropagation();

    if (_this.forceState === -1) {
      _state = STATE.NONE;
    }

    document.removeEventListener('mousemove', mousemove);
    document.removeEventListener('mouseup', mouseup);
    _this.dispatchEvent(endEvent);
  }

  function mousewheel(event) {
    if (_this.enabled === false) return;

    event.preventDefault();
    event.stopPropagation();

    var delta = 0;

    if (event.wheelDelta) {
      // WebKit / Opera / Explorer 9

      delta = event.wheelDelta / 40;
    } else if (event.detail) {
      // Firefox

      delta = -event.detail / 3;
    }

    if (_state !== STATE.CUSTOM) {
      _zoomStart.y += delta * 0.01;
    } else if (_state === STATE.CUSTOM) {
      _customStart.y += delta * 0.01;
    }

    _this.dispatchEvent(startEvent);
    _this.dispatchEvent(endEvent);
  }

  function touchstart(event) {
    if (_this.enabled === false) return;

    if (_this.forceState === -1) {
      switch (event.touches.length) {

        case 1:
          _state = STATE.TOUCH_ROTATE;
          _rotateStart.copy(getMouseProjectionOnBall(event.touches[0].pageX, event.touches[0].pageY));
          _rotateEnd.copy(_rotateStart);
          break;

        case 2:
          _state = STATE.TOUCH_ZOOM;
          var dx = event.touches[0].pageX - event.touches[1].pageX;
          var dy = event.touches[0].pageY - event.touches[1].pageY;
          _touchZoomDistanceEnd = _touchZoomDistanceStart = Math.sqrt(dx * dx + dy * dy);

          var x = (event.touches[0].pageX + event.touches[1].pageX) / 2;
          var y = (event.touches[0].pageY + event.touches[1].pageY) / 2;
          _panStart.copy(getMouseOnScreen(x, y));
          _panEnd.copy(_panStart);
          break;

        default:
          _state = STATE.NONE;
      }
    } else {
      // { NONE: -1, ROTATE: 0, ZOOM: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_ZOOM_PAN: 4, CUSTOM: 99 };
      switch (_state) {

        case 0:
          _state = STATE.TOUCH_ROTATE;
          _rotateStart.copy(getMouseProjectionOnBall(event.touches[0].pageX, event.touches[0].pageY));
          _rotateEnd.copy(_rotateStart);
          break;

        case 1:
        case 4:
          if (event.touches.length >= 2) {
            _state = STATE.TOUCH_ZOOM;
            var dx = event.touches[0].pageX - event.touches[1].pageX;
            var dy = event.touches[0].pageY - event.touches[1].pageY;
            _touchZoomDistanceEnd = _touchZoomDistanceStart = Math.sqrt(dx * dx + dy * dy);
          } else {
            _state = STATE.ZOOM;
            _zoomStart.copy(getMouseOnScreen(event.touches[0].pageX, event.touches[0].pageY));
            _zoomEnd.copy(_zoomStart);
          }
          break;

        case 2:
        case 5:
          if (event.touches.length >= 2) {
            _state = STATE.TOUCH_PAN;
            var x = (event.touches[0].pageX + event.touches[1].pageX) / 2;
            var y = (event.touches[0].pageY + event.touches[1].pageY) / 2;
            _panStart.copy(getMouseOnScreen(x, y));
            _panEnd.copy(_panStart);
          } else {
            _state = STATE.PAN;
            _panStart.copy(getMouseOnScreen(event.touches[0].pageX, event.touches[0].pageY));
            _panEnd.copy(_panStart);
          }
          break;

        case 99:
          _state = STATE.CUSTOM;
          var x = (event.touches[0].pageX + event.touches[1].pageX) / 2;
          var y = (event.touches[0].pageY + event.touches[1].pageY) / 2;
          _customStart.copy(getMouseOnScreen(x, y));
          _customEnd.copy(_customStart);
          break;

        default:
          _state = STATE.NONE;
      }
    }

    _this.dispatchEvent(startEvent);
  }

  function touchmove(event) {
    if (_this.enabled === false) return;

    event.preventDefault();
    event.stopPropagation();
    if (_this.forceState === -1) {
      switch (event.touches.length) {

        case 1:
          _rotateEnd.copy(getMouseProjectionOnBall(event.touches[0].pageX, event.touches[0].pageY));
          break;

        case 2:
          var dx = event.touches[0].pageX - event.touches[1].pageX;
          var dy = event.touches[0].pageY - event.touches[1].pageY;
          _touchZoomDistanceEnd = Math.sqrt(dx * dx + dy * dy);

          var x = (event.touches[0].pageX + event.touches[1].pageX) / 2;
          var y = (event.touches[0].pageY + event.touches[1].pageY) / 2;
          _panEnd.copy(getMouseOnScreen(x, y));
          break;

        default:
          _state = STATE.NONE;

      }
    } else {
      // { NONE: -1, ROTATE: 0, ZOOM: 1, PAN: 2, TOUCH_ROTATE: 3, TOUCH_ZOOM_PAN: 4, CUSTOM: 99 };
      switch (_state) {

        case 0:
          _rotateEnd.copy(getMouseProjectionOnBall(event.touches[0].pageX, event.touches[0].pageY));
          break;

        case 1:
          _zoomEnd.copy(getMouseOnScreen(event.touches[0].pageX, event.touches[0].pageY));
          break;

        case 2:
          _panEnd.copy(getMouseOnScreen(event.touches[0].pageX, event.touches[0].pageY));
          break;

        case 4:
          // 2 fingers!
          // TOUCH ZOOM
          var dx = event.touches[0].pageX - event.touches[1].pageX;
          var dy = event.touches[0].pageY - event.touches[1].pageY;
          _touchZoomDistanceEnd = Math.sqrt(dx * dx + dy * dy);
          break;

        case 5:
          // 2 fingers!
          // TOUCH PAN
          var x = (event.touches[0].pageX + event.touches[1].pageX) / 2;
          var y = (event.touches[0].pageY + event.touches[1].pageY) / 2;
          _panEnd.copy(getMouseOnScreen(x, y));
          break;

        case 99:
          var x = (event.touches[0].pageX + event.touches[1].pageX) / 2;
          var y = (event.touches[0].pageY + event.touches[1].pageY) / 2;
          _customEnd.copy(getMouseOnScreen(x, y));
          break;

        default:
          _state = STATE.NONE;

      }
    }
  }

  function touchend(event) {
    if (_this.enabled === false) return;

    if (_this.forceState === -1) {
      switch (event.touches.length) {

        case 1:
          _rotateEnd.copy(getMouseProjectionOnBall(event.touches[0].pageX, event.touches[0].pageY));
          _rotateStart.copy(_rotateEnd);
          break;

        case 2:
          _touchZoomDistanceStart = _touchZoomDistanceEnd = 0;

          var x = (event.touches[0].pageX + event.touches[1].pageX) / 2;
          var y = (event.touches[0].pageY + event.touches[1].pageY) / 2;
          _panEnd.copy(getMouseOnScreen(x, y));
          _panStart.copy(_panEnd);
          break;

      }

      _state = STATE.NONE;
    } else {
      switch (_state) {
        case 0:
          _rotateEnd.copy(getMouseProjectionOnBall(event.touches[0].pageX, event.touches[0].pageY));
          _rotateStart.copy(_rotateEnd);
          break;

        case 1:
        case 2:
          break;

        case 4:
          _touchZoomDistanceStart = _touchZoomDistanceEnd = 0;
          _state = STATE.ZOOM;
          break;

        case 5:
          if (event.touches.length >= 2) {
            var x = (event.touches[0].pageX + event.touches[1].pageX) / 2;
            var y = (event.touches[0].pageY + event.touches[1].pageY) / 2;
            _panEnd.copy(getMouseOnScreen(x, y));
            _panStart.copy(_panEnd);
          }
          _state = STATE.PAN;
          break;

        case 99:
          var x = (event.touches[0].pageX + event.touches[1].pageX) / 2;
          var y = (event.touches[0].pageY + event.touches[1].pageY) / 2;
          _customEnd.copy(getMouseOnScreen(x, y));
          _customStart.copy(_customEnd);
          break;
      }
    }

    _this.dispatchEvent(endEvent);
  }

  function contextmenu(event) {
    event.preventDefault();
  }

  this.dispose = function () {
    this.domElement.removeEventListener('contextmenu', contextmenu, false);
    this.domElement.removeEventListener('mousedown', mousedown, false);
    this.domElement.removeEventListener('mousewheel', mousewheel, false);
    this.domElement.removeEventListener('DOMMouseScroll', mousewheel, false); // firefox

    this.domElement.removeEventListener('touchstart', touchstart, false);
    this.domElement.removeEventListener('touchend', touchend, false);
    this.domElement.removeEventListener('touchmove', touchmove, false);

    document.removeEventListener('mousemove', mousemove, false);
    document.removeEventListener('mouseup', mouseup, false);

    window.removeEventListener('keydown', keydown, false);
    window.removeEventListener('keyup', keyup, false);
  };

  this.domElement.addEventListener('contextmenu', contextmenu, false);
  this.domElement.addEventListener('mousedown', mousedown, false);
  this.domElement.addEventListener('mousewheel', mousewheel, false);
  this.domElement.addEventListener('DOMMouseScroll', mousewheel, false); // firefox

  this.domElement.addEventListener('touchstart', touchstart, false);
  this.domElement.addEventListener('touchend', touchend, false);
  this.domElement.addEventListener('touchmove', touchmove, false);

  window.addEventListener('keydown', keydown, false);
  window.addEventListener('keyup', keyup, false);

  this.handleResize();

  // force an update at start
  this.update();
};

THREE.OrthographicTrackballControlsCustom.prototype = Object.create(THREE.EventDispatcher.prototype);
THREE.OrthographicTrackballControlsCustom.prototype.constructor = THREE.OrthographicTrackballControlsCustom;

// export the frame module
module.exports = THREE.OrthographicTrackballControlsCustom;