Babylon.js/Babylon/Cameras/babylon.arcRotateCamera.js

var __extends = this.__extends || function (d, b) {
    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
    function __() { this.constructor = d; }
    __.prototype = b.prototype;
    d.prototype = new __();
};
var BABYLON;
(function (BABYLON) {
    var eventPrefix = BABYLON.Tools.GetPointerPrefix();

    var ArcRotateCamera = (function (_super) {
        __extends(ArcRotateCamera, _super);
        function ArcRotateCamera(name, alpha, beta, radius, target, scene) {
            _super.call(this, name, BABYLON.Vector3.Zero(), scene);
            this.alpha = alpha;
            this.beta = beta;
            this.radius = radius;
            this.target = target;
            this.inertialAlphaOffset = 0;
            this.inertialBetaOffset = 0;
            this.inertialRadiusOffset = 0;
            this.lowerAlphaLimit = null;
            this.upperAlphaLimit = null;
            this.lowerBetaLimit = 0.01;
            this.upperBetaLimit = Math.PI;
            this.lowerRadiusLimit = null;
            this.upperRadiusLimit = null;
            this.angularSensibility = 1000.0;
            this.wheelPrecision = 3.0;
            this.keysUp = [38];
            this.keysDown = [40];
            this.keysLeft = [37];
            this.keysRight = [39];
            this.zoomOnFactor = 1;
            this._keys = [];
            this._viewMatrix = new BABYLON.Matrix();

            this.getViewMatrix();
        }
        ArcRotateCamera.prototype._getTargetPosition = function () {
            return this.target.position || this.target;
        };

        // Cache
        ArcRotateCamera.prototype._initCache = function () {
            _super.prototype._initCache.call(this);
            this._cache.target = new BABYLON.Vector3(Number.MAX_VALUE, Number.MAX_VALUE, Number.MAX_VALUE);
            this._cache.alpha = undefined;
            this._cache.beta = undefined;
            this._cache.radius = undefined;
        };

        ArcRotateCamera.prototype._updateCache = function (ignoreParentClass) {
            if (!ignoreParentClass) {
                _super.prototype._updateCache.call(this);
            }

            this._cache.target.copyFrom(this._getTargetPosition());
            this._cache.alpha = this.alpha;
            this._cache.beta = this.beta;
            this._cache.radius = this.radius;
        };

        // Synchronized
        ArcRotateCamera.prototype._isSynchronizedViewMatrix = function () {
            if (!_super.prototype._isSynchronizedViewMatrix.call(this))
                return false;

            return this._cache.target.equals(this._getTargetPosition()) && this._cache.alpha === this.alpha && this._cache.beta === this.beta && this._cache.radius === this.radius;
        };

        // Methods
        ArcRotateCamera.prototype.attachControl = function (element, noPreventDefault) {
            var _this = this;
            var previousPosition;
            var pointerId;

            if (this._attachedElement) {
                return;
            }
            this._attachedElement = element;

            var engine = this.getEngine();

            if (this._onPointerDown === undefined) {
                this._onPointerDown = function (evt) {
                    if (pointerId) {
                        return;
                    }

                    pointerId = evt.pointerId;

                    previousPosition = {
                        x: evt.clientX,
                        y: evt.clientY
                    };

                    if (!noPreventDefault) {
                        evt.preventDefault();
                    }
                };

                this._onPointerUp = function (evt) {
                    previousPosition = null;
                    pointerId = null;
                    if (!noPreventDefault) {
                        evt.preventDefault();
                    }
                };

                this._onPointerMove = function (evt) {
                    if (!previousPosition) {
                        return;
                    }

                    if (pointerId !== evt.pointerId) {
                        return;
                    }

                    var offsetX = evt.clientX - previousPosition.x;
                    var offsetY = evt.clientY - previousPosition.y;

                    _this.inertialAlphaOffset -= offsetX / _this.angularSensibility;
                    _this.inertialBetaOffset -= offsetY / _this.angularSensibility;

                    previousPosition = {
                        x: evt.clientX,
                        y: evt.clientY
                    };

                    if (!noPreventDefault) {
                        evt.preventDefault();
                    }
                };

                this._onMouseMove = function (evt) {
                    if (!engine.isPointerLock) {
                        return;
                    }

                    var offsetX = evt.movementX || evt.mozMovementX || evt.webkitMovementX || evt.msMovementX || 0;
                    var offsetY = evt.movementY || evt.mozMovementY || evt.webkitMovementY || evt.msMovementY || 0;

                    _this.inertialAlphaOffset -= offsetX / _this.angularSensibility;
                    _this.inertialBetaOffset -= offsetY / _this.angularSensibility;

                    if (!noPreventDefault) {
                        evt.preventDefault();
                    }
                };

                this._wheel = function (event) {
                    var delta = 0;
                    if (event.wheelDelta) {
                        delta = event.wheelDelta / (_this.wheelPrecision * 40);
                    } else if (event.detail) {
                        delta = -event.detail / _this.wheelPrecision;
                    }

                    if (delta)
                        _this.inertialRadiusOffset += delta;

                    if (event.preventDefault) {
                        if (!noPreventDefault) {
                            event.preventDefault();
                        }
                    }
                };

                this._onKeyDown = function (evt) {
                    if (_this.keysUp.indexOf(evt.keyCode) !== -1 || _this.keysDown.indexOf(evt.keyCode) !== -1 || _this.keysLeft.indexOf(evt.keyCode) !== -1 || _this.keysRight.indexOf(evt.keyCode) !== -1) {
                        var index = _this._keys.indexOf(evt.keyCode);

                        if (index === -1) {
                            _this._keys.push(evt.keyCode);
                        }

                        if (evt.preventDefault) {
                            if (!noPreventDefault) {
                                evt.preventDefault();
                            }
                        }
                    }
                };

                this._onKeyUp = function (evt) {
                    if (_this.keysUp.indexOf(evt.keyCode) !== -1 || _this.keysDown.indexOf(evt.keyCode) !== -1 || _this.keysLeft.indexOf(evt.keyCode) !== -1 || _this.keysRight.indexOf(evt.keyCode) !== -1) {
                        var index = _this._keys.indexOf(evt.keyCode);

                        if (index >= 0) {
                            _this._keys.splice(index, 1);
                        }

                        if (evt.preventDefault) {
                            if (!noPreventDefault) {
                                evt.preventDefault();
                            }
                        }
                    }
                };

                this._onLostFocus = function () {
                    _this._keys = [];
                    pointerId = null;
                };

                this._onGestureStart = function (e) {
                    if (window.MSGesture === undefined) {
                        return;
                    }

                    if (!_this._MSGestureHandler) {
                        _this._MSGestureHandler = new MSGesture();
                        _this._MSGestureHandler.target = element;
                    }

                    _this._MSGestureHandler.addPointer(e.pointerId);
                };

                this._onGesture = function (e) {
                    _this.radius *= e.scale;

                    if (e.preventDefault) {
                        if (!noPreventDefault) {
                            e.stopPropagation();
                            e.preventDefault();
                        }
                    }
                };

                this._reset = function () {
                    _this._keys = [];
                    _this.inertialAlphaOffset = 0;
                    _this.inertialBetaOffset = 0;
                    _this.inertialRadiusOffset = 0;
                    previousPosition = null;
                    pointerId = null;
                };
            }

            element.addEventListener(eventPrefix + "down", this._onPointerDown, false);
            element.addEventListener(eventPrefix + "up", this._onPointerUp, false);
            element.addEventListener(eventPrefix + "out", this._onPointerUp, false);
            element.addEventListener(eventPrefix + "move", this._onPointerMove, false);
            element.addEventListener("mousemove", this._onMouseMove, false);
            element.addEventListener("MSPointerDown", this._onGestureStart, false);
            element.addEventListener("MSGestureChange", this._onGesture, false);
            element.addEventListener('mousewheel', this._wheel, false);
            element.addEventListener('DOMMouseScroll', this._wheel, false);

            BABYLON.Tools.RegisterTopRootEvents([
                { name: "keydown", handler: this._onKeyDown },
                { name: "keyup", handler: this._onKeyUp },
                { name: "blur", handler: this._onLostFocus }
            ]);
        };

        ArcRotateCamera.prototype.detachControl = function (element) {
            if (this._attachedElement != element) {
                return;
            }

            element.removeEventListener(eventPrefix + "down", this._onPointerDown);
            element.removeEventListener(eventPrefix + "up", this._onPointerUp);
            element.removeEventListener(eventPrefix + "out", this._onPointerUp);
            element.removeEventListener(eventPrefix + "move", this._onPointerMove);
            element.removeEventListener("mousemove", this._onMouseMove);
            element.removeEventListener("MSPointerDown", this._onGestureStart);
            element.removeEventListener("MSGestureChange", this._onGesture);
            element.removeEventListener('mousewheel', this._wheel);
            element.removeEventListener('DOMMouseScroll', this._wheel);

            BABYLON.Tools.UnregisterTopRootEvents([
                { name: "keydown", handler: this._onKeyDown },
                { name: "keyup", handler: this._onKeyUp },
                { name: "blur", handler: this._onLostFocus }
            ]);

            this._MSGestureHandler = null;
            this._attachedElement = null;

            if (this._reset) {
                this._reset();
            }
        };

        ArcRotateCamera.prototype._update = function () {
            for (var index = 0; index < this._keys.length; index++) {
                var keyCode = this._keys[index];

                if (this.keysLeft.indexOf(keyCode) !== -1) {
                    this.inertialAlphaOffset -= 0.01;
                } else if (this.keysUp.indexOf(keyCode) !== -1) {
                    this.inertialBetaOffset -= 0.01;
                } else if (this.keysRight.indexOf(keyCode) !== -1) {
                    this.inertialAlphaOffset += 0.01;
                } else if (this.keysDown.indexOf(keyCode) !== -1) {
                    this.inertialBetaOffset += 0.01;
                }
            }

            // Inertia
            if (this.inertialAlphaOffset != 0 || this.inertialBetaOffset != 0 || this.inertialRadiusOffset != 0) {
                this.alpha += this.inertialAlphaOffset;
                this.beta += this.inertialBetaOffset;
                this.radius -= this.inertialRadiusOffset;

                this.inertialAlphaOffset *= this.inertia;
                this.inertialBetaOffset *= this.inertia;
                this.inertialRadiusOffset *= this.inertia;

                if (Math.abs(this.inertialAlphaOffset) < BABYLON.Engine.Epsilon)
                    this.inertialAlphaOffset = 0;

                if (Math.abs(this.inertialBetaOffset) < BABYLON.Engine.Epsilon)
                    this.inertialBetaOffset = 0;

                if (Math.abs(this.inertialRadiusOffset) < BABYLON.Engine.Epsilon)
                    this.inertialRadiusOffset = 0;
            }

            // Limits
            if (this.lowerAlphaLimit && this.alpha < this.lowerAlphaLimit) {
                this.alpha = this.lowerAlphaLimit;
            }
            if (this.upperAlphaLimit && this.alpha > this.upperAlphaLimit) {
                this.alpha = this.upperAlphaLimit;
            }
            if (this.lowerBetaLimit && this.beta < this.lowerBetaLimit) {
                this.beta = this.lowerBetaLimit;
            }
            if (this.upperBetaLimit && this.beta > this.upperBetaLimit) {
                this.beta = this.upperBetaLimit;
            }
            if (this.lowerRadiusLimit && this.radius < this.lowerRadiusLimit) {
                this.radius = this.lowerRadiusLimit;
            }
            if (this.upperRadiusLimit && this.radius > this.upperRadiusLimit) {
                this.radius = this.upperRadiusLimit;
            }
        };

        ArcRotateCamera.prototype.setPosition = function (position) {
            var radiusv3 = position.subtract(this._getTargetPosition());
            this.radius = radiusv3.length();

            // Alpha
            this.alpha = Math.acos(radiusv3.x / Math.sqrt(Math.pow(radiusv3.x, 2) + Math.pow(radiusv3.z, 2)));

            if (radiusv3.z < 0) {
                this.alpha = 2 * Math.PI - this.alpha;
            }

            // Beta
            this.beta = Math.acos(radiusv3.y / this.radius);
        };

        ArcRotateCamera.prototype._getViewMatrix = function () {
            // Compute
            var cosa = Math.cos(this.alpha);
            var sina = Math.sin(this.alpha);
            var cosb = Math.cos(this.beta);
            var sinb = Math.sin(this.beta);

            var target = this._getTargetPosition();

            target.addToRef(new BABYLON.Vector3(this.radius * cosa * sinb, this.radius * cosb, this.radius * sina * sinb), this.position);
            BABYLON.Matrix.LookAtLHToRef(this.position, target, this.upVector, this._viewMatrix);

            return this._viewMatrix;
        };

        ArcRotateCamera.prototype.zoomOn = function (meshes) {
            meshes = meshes || this.getScene().meshes;

            var minMaxVector = BABYLON.Mesh.MinMax(meshes);
            var distance = BABYLON.Vector3.Distance(minMaxVector.min, minMaxVector.max);

            this.radius = distance * this.zoomOnFactor;

            this.focusOn({ min: minMaxVector.min, max: minMaxVector.max, distance: distance });
        };

        ArcRotateCamera.prototype.focusOn = function (meshesOrMinMaxVectorAndDistance) {
            var meshesOrMinMaxVector;
            var distance;

            if (meshesOrMinMaxVectorAndDistance.min === undefined) {
                meshesOrMinMaxVector = meshesOrMinMaxVectorAndDistance || this.getScene().meshes;
                meshesOrMinMaxVector = BABYLON.Mesh.MinMax(meshesOrMinMaxVector);
                distance = BABYLON.Vector3.Distance(meshesOrMinMaxVector.min, meshesOrMinMaxVector.max);
            } else {
                meshesOrMinMaxVector = meshesOrMinMaxVectorAndDistance;
                distance = meshesOrMinMaxVectorAndDistance.distance;
            }

            this.target = BABYLON.Mesh.Center(meshesOrMinMaxVector);

            this.maxZ = distance * 2;
        };
        return ArcRotateCamera;
    })(BABYLON.Camera);
    BABYLON.ArcRotateCamera = ArcRotateCamera;
})(BABYLON || (BABYLON = {}));
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