Create camera-controls/orbit-camera.js

camera-controls/orbit-camera.js

@@ -0,0 +1,664 @@
+////////////////////////////////////////////////////////////////////////////////
+//                             Orbit Camera Script                            //
+////////////////////////////////////////////////////////////////////////////////
+
+var OrbitCamera = pc.createScript('orbitCamera');
+
+OrbitCamera.attributes.add('distanceMax', { type: 'number', default: 20, title: 'Distance Max', description: 'Setting this at 0 will give an infinite distance limit' });
+OrbitCamera.attributes.add('distanceMin', { type: 'number', default: 1, title: 'Distance Min' });
+OrbitCamera.attributes.add('pitchAngleMax', { type: 'number', default: 90, title: 'Pitch Angle Max (degrees)' });
+OrbitCamera.attributes.add('pitchAngleMin', { type: 'number', default: -45, title: 'Pitch Angle Min (degrees)' });
+OrbitCamera.attributes.add('yawAngleMax', { type: 'number', default: 360, title: 'Yaw Angle Max (degrees)' });
+OrbitCamera.attributes.add('yawAngleMin', { type: 'number', default: -360, title: 'Yaw Angle Min (degrees)' });
+
+OrbitCamera.attributes.add('inertiaFactor', {
+    type: 'number',
+    default: 0.2,
+    title: 'Inertia Factor',
+    description: 'Higher value means that the camera will continue moving after the user has stopped dragging. 0 is fully responsive.'
+});
+
+OrbitCamera.attributes.add('focusEntity', {
+    type: 'entity',
+    title: 'Focus Entity',
+    description: 'Entity for the camera to focus on. If blank, then the camera will use the whole scene'
+});
+
+OrbitCamera.attributes.add('frameOnStart', {
+    type: 'boolean',
+    default: true,
+    title: 'Frame on Start',
+    description: 'Frames the entity or scene at the start of the application."'
+});
+
+
+// Property to get and set the distance between the pivot point and camera
+// Clamped between this.distanceMin and this.distanceMax
+Object.defineProperty(OrbitCamera.prototype, 'distance', {
+    get: function () {
+        return this._targetDistance;
+    },
+
+    set: function (value) {
+        this._targetDistance = this._clampDistance(value);
+    }
+});
+
+// Property to get and set the camera orthoHeight
+// Clamped above 0
+Object.defineProperty(OrbitCamera.prototype, 'orthoHeight', {
+    get: function () {
+        return this.entity.camera.orthoHeight;
+    },
+
+    set: function (value) {
+        this.entity.camera.orthoHeight = Math.max(0, value);
+    }
+});
+
+
+// Property to get and set the pitch of the camera around the pivot point (degrees)
+// Clamped between this.pitchAngleMin and this.pitchAngleMax
+// When set at 0, the camera angle is flat, looking along the horizon
+Object.defineProperty(OrbitCamera.prototype, 'pitch', {
+    get: function () {
+        return this._targetPitch;
+    },
+
+    set: function (value) {
+        this._targetPitch = this._clampPitchAngle(value);
+    }
+});
+
+
+// Property to get and set the yaw of the camera around the pivot point (degrees)
+Object.defineProperty(OrbitCamera.prototype, 'yaw', {
+    get: function () {
+        return this._targetYaw;
+    },
+
+    set: function (value) {
+        this._targetYaw = this._clampYawAngle(value);
+    }
+});
+
+
+// Property to get and set the world position of the pivot point that the camera orbits around
+Object.defineProperty(OrbitCamera.prototype, 'pivotPoint', {
+    get: function () {
+        return this._pivotPoint;
+    },
+
+    set: function (value) {
+        this._pivotPoint.copy(value);
+    }
+});
+
+
+// Moves the camera to look at an entity and all its children so they are all in the view
+OrbitCamera.prototype.focus = function (focusEntity) {
+    // Calculate an bounding box that encompasses all the models to frame in the camera view
+    this._buildAabb(focusEntity);
+
+    var halfExtents = this._modelsAabb.halfExtents;
+    var radius = Math.max(halfExtents.x, Math.max(halfExtents.y, halfExtents.z));
+
+    this.distance = (radius * 1.5) / Math.sin(0.5 * this.entity.camera.fov * pc.math.DEG_TO_RAD);
+
+    this._removeInertia();
+
+    this._pivotPoint.copy(this._modelsAabb.center);
+};
+
+
+OrbitCamera.distanceBetween = new pc.Vec3();
+
+// Set the camera position to a world position and look at a world position
+// Useful if you have multiple viewing angles to swap between in a scene
+OrbitCamera.prototype.resetAndLookAtPoint = function (resetPoint, lookAtPoint) {
+    this.pivotPoint.copy(lookAtPoint);
+    this.entity.setPosition(resetPoint);
+
+    this.entity.lookAt(lookAtPoint);
+
+    var distance = OrbitCamera.distanceBetween;
+    distance.sub2(lookAtPoint, resetPoint);
+    this.distance = distance.length();
+
+    this.pivotPoint.copy(lookAtPoint);
+
+    var cameraQuat = this.entity.getRotation();
+    this.yaw = this._calcYaw(cameraQuat);
+    this.pitch = this._calcPitch(cameraQuat, this.yaw);
+
+    this._removeInertia();
+    this._updatePosition();
+};
+
+
+// Set camera position to a world position and look at an entity in the scene
+// Useful if you have multiple models to swap between in a scene
+OrbitCamera.prototype.resetAndLookAtEntity = function (resetPoint, entity) {
+    this._buildAabb(entity);
+    this.resetAndLookAtPoint(resetPoint, this._modelsAabb.center);
+};
+
+
+// Set the camera at a specific, yaw, pitch and distance without inertia (instant cut)
+OrbitCamera.prototype.reset = function (yaw, pitch, distance) {
+    this.pitch = pitch;
+    this.yaw = yaw;
+    this.distance = distance;
+
+    this._removeInertia();
+};
+
+// NEW: Reset the camera to a specific position and make it look at the model
+OrbitCamera.prototype.resetToPosition = function (position, lookAtPoint) {
+    // First set the camera position and look at the model
+    this.entity.setPosition(position);
+    this.entity.lookAt(lookAtPoint);
+    
+    // Update pivot point to the model's position
+    this._pivotPoint.copy(lookAtPoint);
+    
+    // Calculate distance
+    var distanceVec = new pc.Vec3();
+    distanceVec.sub2(position, lookAtPoint);
+    this._targetDistance = this._distance = distanceVec.length();
+    
+    // Calculate new yaw and pitch based on the camera's rotation
+    var cameraQuat = this.entity.getRotation();
+    this._targetYaw = this._yaw = this._calcYaw(cameraQuat);
+    this._targetPitch = this._pitch = this._calcPitch(cameraQuat, this._yaw);
+    
+    // Remove any inertia and update the camera position
+    this._removeInertia();
+    this._updatePosition();
+};
+
+
+/////////////////////////////////////////////////////////////////////////////////////////////
+// Private methods
+
+OrbitCamera.prototype.initialize = function () {
+    var self = this;
+    var onWindowResize = function () {
+        self._checkAspectRatio();
+    };
+
+    window.addEventListener('resize', onWindowResize, false);
+
+    this._checkAspectRatio();
+
+    // Find all the models in the scene that are under the focused entity
+    this._modelsAabb = new pc.BoundingBox();
+    this._buildAabb(this.focusEntity || this.app.root);
+
+    this.entity.lookAt(this._modelsAabb.center);
+
+    this._pivotPoint = new pc.Vec3();
+    this._pivotPoint.copy(this._modelsAabb.center);
+
+    // Calculate the camera euler angle rotation around x and y axes
+    // This allows us to place the camera at a particular rotation to begin with in the scene
+    var cameraQuat = this.entity.getRotation();
+
+    // Preset the camera
+    this._yaw = this._calcYaw(cameraQuat);
+    this._pitch = this._clampPitchAngle(this._calcPitch(cameraQuat, this._yaw));
+    this.entity.setLocalEulerAngles(this._pitch, this._yaw, 0);
+
+    this._distance = 0;
+
+    this._targetYaw = this._yaw;
+    this._targetPitch = this._pitch;
+
+    // If we have ticked focus on start, then attempt to position the camera where it frames
+    // the focused entity and move the pivot point to entity's position otherwise, set the distance
+    // to be between the camera position in the scene and the pivot point
+    if (this.frameOnStart) {
+        this.focus(this.focusEntity || this.app.root);
+    } else {
+        var distanceBetween = new pc.Vec3();
+        distanceBetween.sub2(this.entity.getPosition(), this._pivotPoint);
+        this._distance = this._clampDistance(distanceBetween.length());
+    }
+
+    this._targetDistance = this._distance;
+
+    // Reapply the clamps if they are changed in the editor
+    this.on('attr:distanceMin', function (value, prev) {
+        this._distance = this._clampDistance(this._distance);
+    });
+
+    this.on('attr:distanceMax', function (value, prev) {
+        this._distance = this._clampDistance(this._distance);
+    });
+
+    this.on('attr:pitchAngleMin', function (value, prev) {
+        this._pitch = this._clampPitchAngle(this._pitch);
+    });
+
+    this.on('attr:pitchAngleMax', function (value, prev) {
+        this._pitch = this._clampPitchAngle(this._pitch);
+    });
+
+    // Focus on the entity if we change the focus entity
+    this.on('attr:focusEntity', function (value, prev) {
+        if (this.frameOnStart) {
+            this.focus(value || this.app.root);
+        } else {
+            this.resetAndLookAtEntity(this.entity.getPosition(), value || this.app.root);
+        }
+    });
+
+    this.on('attr:frameOnStart', function (value, prev) {
+        if (value) {
+            this.focus(this.focusEntity || this.app.root);
+        }
+    });
+
+    this.on('destroy', () => {
+        window.removeEventListener('resize', onWindowResize, false);
+    });
+};
+
+
+OrbitCamera.prototype.update = function (dt) {
+    // Add inertia, if any
+    var t = this.inertiaFactor === 0 ? 1 : Math.min(dt / this.inertiaFactor, 1);
+    this._distance = pc.math.lerp(this._distance, this._targetDistance, t);
+    this._yaw = pc.math.lerp(this._yaw, this._targetYaw, t);
+    this._pitch = pc.math.lerp(this._pitch, this._targetPitch, t);
+
+    this._updatePosition();
+};
+
+
+OrbitCamera.prototype._updatePosition = function () {
+    // Work out the camera position based on the pivot point, pitch, yaw and distance
+    this.entity.setLocalPosition(0, 0, 0);
+    this.entity.setLocalEulerAngles(this._pitch, this._yaw, 0);
+
+    var position = this.entity.getPosition();
+    position.copy(this.entity.forward);
+    position.mulScalar(-this._distance);
+    position.add(this.pivotPoint);
+    this.entity.setPosition(position);
+};
+
+
+OrbitCamera.prototype._removeInertia = function () {
+    this._yaw = this._targetYaw;
+    this._pitch = this._targetPitch;
+    this._distance = this._targetDistance;
+};
+
+
+OrbitCamera.prototype._checkAspectRatio = function () {
+    var height = this.app.graphicsDevice.height;
+    var width = this.app.graphicsDevice.width;
+
+    // Match the axis of FOV to match the aspect ratio of the canvas so
+    // the focused entities is always in frame
+    this.entity.camera.horizontalFov = height > width;
+};
+
+
+OrbitCamera.prototype._buildAabb = function (entity) {
+    var i, m, meshInstances = [];
+
+    var renders = entity.findComponents('render');
+    for (i = 0; i < renders.length; i++) {
+        var render = renders[i];
+        for (m = 0; m < render.meshInstances.length; m++) {
+            meshInstances.push(render.meshInstances[m]);
+        }
+    }
+
+    var models = entity.findComponents('model');
+    for (i = 0; i < models.length; i++) {
+        var model = models[i];
+        for (m = 0; m < model.meshInstances.length; m++) {
+            meshInstances.push(model.meshInstances[m]);
+        }
+    }
+
+    var gsplats = entity.findComponents('gsplat');
+    for (i = 0; i < gsplats.length; i++) {
+        var gsplat = gsplats[i];
+        var instance = gsplat.instance;
+        if (instance?.meshInstance) {
+            meshInstances.push(instance.meshInstance);
+        }
+    }
+
+    for (i = 0; i < meshInstances.length; i++) {
+        if (i === 0) {
+            this._modelsAabb.copy(meshInstances[i].aabb);
+        } else {
+            this._modelsAabb.add(meshInstances[i].aabb);
+        }
+    }
+};
+
+
+OrbitCamera.prototype._calcYaw = function (quat) {
+    var transformedForward = new pc.Vec3();
+    quat.transformVector(pc.Vec3.FORWARD, transformedForward);
+
+    return Math.atan2(-transformedForward.x, -transformedForward.z) * pc.math.RAD_TO_DEG;
+};
+
+
+OrbitCamera.prototype._clampDistance = function (distance) {
+    if (this.distanceMax > 0) {
+        return pc.math.clamp(distance, this.distanceMin, this.distanceMax);
+    }
+    return Math.max(distance, this.distanceMin);
+
+};
+
+
+OrbitCamera.prototype._clampPitchAngle = function (pitch) {
+    // Negative due as the pitch is inversed since the camera is orbiting the entity
+    return pc.math.clamp(pitch, -this.pitchAngleMax, -this.pitchAngleMin);
+};
+
+OrbitCamera.prototype._clampYawAngle = function (yaw) {
+    // Negative due as the pitch is inversed since the camera is orbiting the entity
+    return pc.math.clamp(yaw, -this.yawAngleMax, -this.yawAngleMin);
+};
+
+
+OrbitCamera.quatWithoutYaw = new pc.Quat();
+OrbitCamera.yawOffset = new pc.Quat();
+
+OrbitCamera.prototype._calcPitch = function (quat, yaw) {
+    var quatWithoutYaw = OrbitCamera.quatWithoutYaw;
+    var yawOffset = OrbitCamera.yawOffset;
+
+    yawOffset.setFromEulerAngles(0, -yaw, 0);
+    quatWithoutYaw.mul2(yawOffset, quat);
+
+    var transformedForward = new pc.Vec3();
+
+    quatWithoutYaw.transformVector(pc.Vec3.FORWARD, transformedForward);
+
+    return Math.atan2(transformedForward.y, -transformedForward.z) * pc.math.RAD_TO_DEG;
+};
+
+
+////////////////////////////////////////////////////////////////////////////////
+//                       Orbit Camera Mouse Input Script                      //
+////////////////////////////////////////////////////////////////////////////////
+var OrbitCameraInputMouse = pc.createScript('orbitCameraInputMouse');
+
+OrbitCameraInputMouse.attributes.add('orbitSensitivity', {
+    type: 'number',
+    default: 0.3,
+    title: 'Orbit Sensitivity',
+    description: 'How fast the camera moves around the orbit. Higher is faster'
+});
+
+OrbitCameraInputMouse.attributes.add('distanceSensitivity', {
+    type: 'number',
+    default: 0.4,
+    title: 'Distance Sensitivity',
+    description: 'How fast the camera moves in and out. Higher is faster'
+});
+
+// initialize code called once per entity
+OrbitCameraInputMouse.prototype.initialize = function () {
+    this.orbitCamera = this.entity.script.orbitCamera;
+
+    if (this.orbitCamera) {
+        var self = this;
+
+        var onMouseOut = function (e) {
+            self.onMouseOut(e);
+        };
+
+        this.app.mouse.on(pc.EVENT_MOUSEDOWN, this.onMouseDown, this);
+        this.app.mouse.on(pc.EVENT_MOUSEUP, this.onMouseUp, this);
+        this.app.mouse.on(pc.EVENT_MOUSEMOVE, this.onMouseMove, this);
+        this.app.mouse.on(pc.EVENT_MOUSEWHEEL, this.onMouseWheel, this);
+
+        // Listen to when the mouse travels out of the window
+        window.addEventListener('mouseout', onMouseOut, false);
+
+        // Remove the listeners so if this entity is destroyed
+        this.on('destroy', function () {
+            this.app.mouse.off(pc.EVENT_MOUSEDOWN, this.onMouseDown, this);
+            this.app.mouse.off(pc.EVENT_MOUSEUP, this.onMouseUp, this);
+            this.app.mouse.off(pc.EVENT_MOUSEMOVE, this.onMouseMove, this);
+            this.app.mouse.off(pc.EVENT_MOUSEWHEEL, this.onMouseWheel, this);
+
+            window.removeEventListener('mouseout', onMouseOut, false);
+        });
+    }
+
+    // Disabling the context menu stops the browser displaying a menu when
+    // you right-click the page
+    this.app.mouse.disableContextMenu();
+
+    this.lookButtonDown = false;
+    this.panButtonDown = false;
+    this.lastPoint = new pc.Vec2();
+};
+
+
+OrbitCameraInputMouse.fromWorldPoint = new pc.Vec3();
+OrbitCameraInputMouse.toWorldPoint = new pc.Vec3();
+OrbitCameraInputMouse.worldDiff = new pc.Vec3();
+
+
+OrbitCameraInputMouse.prototype.pan = function (screenPoint) {
+    var fromWorldPoint = OrbitCameraInputMouse.fromWorldPoint;
+    var toWorldPoint = OrbitCameraInputMouse.toWorldPoint;
+    var worldDiff = OrbitCameraInputMouse.worldDiff;
+
+    // For panning to work at any zoom level, we use screen point to world projection
+    // to work out how far we need to pan the pivotEntity in world space
+    var camera = this.entity.camera;
+    var distance = this.orbitCamera.distance;
+
+    camera.screenToWorld(screenPoint.x, screenPoint.y, distance, fromWorldPoint);
+    camera.screenToWorld(this.lastPoint.x, this.lastPoint.y, distance, toWorldPoint);
+
+    worldDiff.sub2(toWorldPoint, fromWorldPoint);
+
+    this.orbitCamera.pivotPoint.add(worldDiff);
+};
+
+
+OrbitCameraInputMouse.prototype.onMouseDown = function (event) {
+    switch (event.button) {
+        case pc.MOUSEBUTTON_LEFT:
+            this.panButtonDown = true;
+            break;
+        case pc.MOUSEBUTTON_MIDDLE:
+        case pc.MOUSEBUTTON_RIGHT:
+            this.lookButtonDown = true;
+            break;
+    }
+};
+
+
+OrbitCameraInputMouse.prototype.onMouseUp = function (event) {
+    switch (event.button) {
+        case pc.MOUSEBUTTON_LEFT:
+            this.panButtonDown = false;
+            break;
+        case pc.MOUSEBUTTON_MIDDLE:
+        case pc.MOUSEBUTTON_RIGHT:
+            this.lookButtonDown = false;
+            break;
+    }
+};
+
+
+OrbitCameraInputMouse.prototype.onMouseMove = function (event) {
+    if (this.lookButtonDown) {
+        this.orbitCamera.pitch -= event.dy * this.orbitSensitivity;
+        this.orbitCamera.yaw -= event.dx * this.orbitSensitivity;
+
+    } else if (this.panButtonDown) {
+        this.pan(event);
+    }
+
+    this.lastPoint.set(event.x, event.y);
+};
+
+
+OrbitCameraInputMouse.prototype.onMouseWheel = function (event) {
+    if (this.entity.camera.projection === pc.PROJECTION_PERSPECTIVE) {
+        this.orbitCamera.distance -= event.wheelDelta * this.distanceSensitivity * (this.orbitCamera.distance * 0.1);
+    } else {
+        this.orbitCamera.orthoHeight -= event.wheelDelta * this.distanceSensitivity * (this.orbitCamera.orthoHeight * 0.1);
+    }
+    event.event.preventDefault();
+};
+
+
+OrbitCameraInputMouse.prototype.onMouseOut = function (event) {
+    this.lookButtonDown = false;
+    this.panButtonDown = false;
+};
+
+
+////////////////////////////////////////////////////////////////////////////////
+//                       Orbit Camera Touch Input Script                      //
+////////////////////////////////////////////////////////////////////////////////
+var OrbitCameraInputTouch = pc.createScript('orbitCameraInputTouch');
+
+OrbitCameraInputTouch.attributes.add('orbitSensitivity', {
+    type: 'number',
+    default: 0.6,
+    title: 'Orbit Sensitivity',
+    description: 'How fast the camera moves around the orbit. Higher is faster'
+});
+
+OrbitCameraInputTouch.attributes.add('distanceSensitivity', {
+    type: 'number',
+    default: 0.5,
+    title: 'Distance Sensitivity',
+    description: 'How fast the camera moves in and out. Higher is faster'
+});
+
+// initialize code called once per entity
+OrbitCameraInputTouch.prototype.initialize = function () {
+    this.orbitCamera = this.entity.script.orbitCamera;
+
+    // Store the position of the touch so we can calculate the distance moved
+    this.lastTouchPoint = new pc.Vec2();
+    this.lastPinchMidPoint = new pc.Vec2();
+    this.lastPinchDistance = 0;
+
+    if (this.orbitCamera && this.app.touch) {
+        // Use the same callback for the touchStart, touchEnd and touchCancel events as they
+        // all do the same thing which is to deal the possible multiple touches to the screen
+        this.app.touch.on(pc.EVENT_TOUCHSTART, this.onTouchStartEndCancel, this);
+        this.app.touch.on(pc.EVENT_TOUCHEND, this.onTouchStartEndCancel, this);
+        this.app.touch.on(pc.EVENT_TOUCHCANCEL, this.onTouchStartEndCancel, this);
+
+        this.app.touch.on(pc.EVENT_TOUCHMOVE, this.onTouchMove, this);
+
+        this.on('destroy', function () {
+            this.app.touch.off(pc.EVENT_TOUCHSTART, this.onTouchStartEndCancel, this);
+            this.app.touch.off(pc.EVENT_TOUCHEND, this.onTouchStartEndCancel, this);
+            this.app.touch.off(pc.EVENT_TOUCHCANCEL, this.onTouchStartEndCancel, this);
+
+            this.app.touch.off(pc.EVENT_TOUCHMOVE, this.onTouchMove, this);
+        });
+    }
+};
+
+
+OrbitCameraInputTouch.prototype.getPinchDistance = function (pointA, pointB) {
+    // Return the distance between the two points
+    var dx = pointA.x - pointB.x;
+    var dy = pointA.y - pointB.y;
+
+    return Math.sqrt((dx * dx) + (dy * dy));
+};
+
+
+OrbitCameraInputTouch.prototype.calcMidPoint = function (pointA, pointB, result) {
+    result.set(pointB.x - pointA.x, pointB.y - pointA.y);
+    result.mulScalar(0.5);
+    result.x += pointA.x;
+    result.y += pointA.y;
+};
+
+
+OrbitCameraInputTouch.prototype.onTouchStartEndCancel = function (event) {
+    // We only care about the first touch for camera rotation. As the user touches the screen,
+    // we stored the current touch position
+    var touches = event.touches;
+    if (touches.length === 1) {
+        this.lastTouchPoint.set(touches[0].x, touches[0].y);
+
+    } else if (touches.length === 2) {
+        // If there are 2 touches on the screen, then set the pinch distance
+        this.lastPinchDistance = this.getPinchDistance(touches[0], touches[1]);
+        this.calcMidPoint(touches[0], touches[1], this.lastPinchMidPoint);
+    }
+};
+
+
+OrbitCameraInputTouch.fromWorldPoint = new pc.Vec3();
+OrbitCameraInputTouch.toWorldPoint = new pc.Vec3();
+OrbitCameraInputTouch.worldDiff = new pc.Vec3();
+
+
+OrbitCameraInputTouch.prototype.pan = function (midPoint) {
+    var fromWorldPoint = OrbitCameraInputTouch.fromWorldPoint;
+    var toWorldPoint = OrbitCameraInputTouch.toWorldPoint;
+    var worldDiff = OrbitCameraInputTouch.worldDiff;
+
+    // For panning to work at any zoom level, we use screen point to world projection
+    // to work out how far we need to pan the pivotEntity in world space
+    var camera = this.entity.camera;
+    var distance = this.orbitCamera.distance;
+
+    camera.screenToWorld(midPoint.x, midPoint.y, distance, fromWorldPoint);
+    camera.screenToWorld(this.lastPinchMidPoint.x, this.lastPinchMidPoint.y, distance, toWorldPoint);
+
+    worldDiff.sub2(toWorldPoint, fromWorldPoint);
+
+    this.orbitCamera.pivotPoint.add(worldDiff);
+};
+
+
+OrbitCameraInputTouch.pinchMidPoint = new pc.Vec2();
+
+OrbitCameraInputTouch.prototype.onTouchMove = function (event) {
+    var pinchMidPoint = OrbitCameraInputTouch.pinchMidPoint;
+
+    // We only care about the first touch for camera rotation. Work out the difference moved since the last event
+    // and use that to update the camera target position
+    var touches = event.touches;
+    if (touches.length === 1) {
+        var touch = touches[0];
+
+        this.orbitCamera.pitch -= (touch.y - this.lastTouchPoint.y) * this.orbitSensitivity;
+        this.orbitCamera.yaw -= (touch.x - this.lastTouchPoint.x) * this.orbitSensitivity;
+
+        this.lastTouchPoint.set(touch.x, touch.y);
+
+    } else if (touches.length === 2) {
+        // Calculate the difference in pinch distance since the last event
+        var currentPinchDistance = this.getPinchDistance(touches[0], touches[1]);
+        var diffInPinchDistance = currentPinchDistance - this.lastPinchDistance;
+        this.lastPinchDistance = currentPinchDistance;
+
+        this.orbitCamera.distance -= (diffInPinchDistance * this.distanceSensitivity * 0.1) * (this.orbitCamera.distance * 0.1);
+
+        // Calculate pan difference
+        this.calcMidPoint(touches[0], touches[1], pinchMidPoint);
+        this.pan(pinchMidPoint);
+        this.lastPinchMidPoint.copy(pinchMidPoint);
+    }
+};