Update orbit-camera.js

orbit-camera.js

@@ -1,6 +1,5 @@
-// orbit-camera.js
 ///////////////////////////////////////////////////////////////////////////////
-//                             Orbit Camera Script                            //
+//                             Orbit Camera Script  qui marche presque                          //
 ////////////////////////////////////////////////////////////////////////////////
 
 var OrbitCamera = pc.createScript('orbitCamera');
@@ -8,40 +7,95 @@ 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: -90, title: 'Pitch Angle Min (degrees)' });
+// Note: This default will be overridden by your JSON config. In your JSON you set minAngle to -90.
+OrbitCamera.attributes.add('pitchAngleMin', { type: 'number', default: 0, 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('minY', { type: 'number', default: 0, title: 'Minimum Y' });
-OrbitCamera.attributes.add('inertiaFactor', { type: 'number', default: 0.2, title: 'Inertia Factor' });
-OrbitCamera.attributes.add('focusEntity', { type: 'entity', title: 'Focus Entity' });
-OrbitCamera.attributes.add('frameOnStart', { type: 'boolean', default: true, title: 'Frame on Start' });
+// NEW: Added minY attribute to define the minimum allowed Y value for the camera.
+OrbitCamera.attributes.add('minY', { type: 'number', default: 0, title: 'Minimum Y', description: 'Minimum Y value for the camera during orbiting or translation' });
+
+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); }
+    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); }
+    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 (in degrees) of the camera around the pivot.
+// The pitch value is clamped between pitchAngleMin and pitchAngleMax.
+// With your JSON (minAngle: -90, maxAngle: 0), the allowed pitch will be from -90 (overhead)
+// to 0 (horizontal).
 Object.defineProperty(OrbitCamera.prototype, 'pitch', {
-    get: function () { return this._targetPitch; },
-    set: function (value) { this._targetPitch = this._clampPitchAngle(value); }
+    get: function () {
+        return this._targetPitch;
+    },
+    set: function (value) {
+        this._targetPitch = this._clampPitchAngle(value);
+    }
 });
 
+
+// Property to get and set the yaw (in degrees) of the camera around the pivot.
 Object.defineProperty(OrbitCamera.prototype, 'yaw', {
-    get: function () { return this._targetYaw; },
-    set: function (value) { this._targetYaw = this._clampYawAngle(value); }
+    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); }
+    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 view.
 OrbitCamera.prototype.focus = function (focusEntity) {
+    // Calculate a bounding box that encompasses all 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));
@@ -52,6 +106,7 @@ OrbitCamera.prototype.focus = function (focusEntity) {
 
 OrbitCamera.distanceBetween = new pc.Vec3();
 
+// Set the camera position to a world position and look at a world position.
 OrbitCamera.prototype.resetAndLookAtPoint = function (resetPoint, lookAtPoint) {
     this.pivotPoint.copy(lookAtPoint);
     this.entity.setPosition(resetPoint);
@@ -93,22 +148,70 @@ OrbitCamera.prototype.resetToPosition = function (position, lookAtPoint) {
     this._updatePosition();
 };
 
+
+////////////////////////////////////////////////////////////////////////////////
+//                          Private Methods                                 //
+////////////////////////////////////////////////////////////////////////////////
+
 OrbitCamera.prototype.initialize = function () {
+    var self = this;
+    var onWindowResize = function () {
+        self._checkAspectRatio();
+    };
+
+    window.addEventListener('resize', onWindowResize, false);
+    this._checkAspectRatio();
     this._modelsAabb = new pc.BoundingBox();
-    this._pivotPoint = new pc.Vec3();
     this._buildAabb(this.focusEntity || this.app.root);
     this.entity.lookAt(this._modelsAabb.center);
+    this._pivotPoint = new pc.Vec3();
     this._pivotPoint.copy(this._modelsAabb.center);
     var cameraQuat = this.entity.getRotation();
     this._yaw = this._calcYaw(cameraQuat);
+    // Compute pitch and clamp it immediately.
     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;
-    this._distance = this._clampDistance(this._distance);
+
+    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;
-    if (this.frameOnStart) this.focus(this.focusEntity || this.app.root);
+
+    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);
+    });
+    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', function () {
+        window.removeEventListener('resize', onWindowResize, false);
+    });
 };
 
 OrbitCamera.prototype.update = function (dt) {
@@ -126,6 +229,8 @@ OrbitCamera.prototype._updatePosition = function () {
     position.copy(this.entity.forward);
     position.mulScalar(-this._distance);
     position.add(this.pivotPoint);
+    // NEW: Clamp the camera's Y position so it never goes below the specified minY value.
+    position.y = Math.max(position.y, this.minY);
     this.entity.setPosition(position);
 };
 
@@ -135,94 +240,285 @@ OrbitCamera.prototype._removeInertia = function () {
     this._distance = this._targetDistance;
 };
 
+OrbitCamera.prototype._checkAspectRatio = function () {
+    var height = this.app.graphicsDevice.height;
+    var width = this.app.graphicsDevice.width;
+    this.entity.camera.horizontalFov = (height > width);
+};
+
 OrbitCamera.prototype._buildAabb = function (entity) {
-    var meshInstances = [];
+    var i, m, meshInstances = [];
     var renders = entity.findComponents('render');
-    for (var i = 0; i < renders.length; i++) {
-        meshInstances.push(...renders[i].meshInstances);
+    for (i = 0; i < renders.length; i++) {
+        var render = renders[i];
+        for (m = 0; m < render.meshInstances.length; m++) {
+            meshInstances.push(render.meshInstances[m]);
+        }
     }
-    for (var i = 0; i < meshInstances.length; i++) {
-        if (i === 0) this._modelsAabb.copy(meshInstances[i].aabb);
-        else this._modelsAabb.add(meshInstances[i].aabb);
+    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 v = new pc.Vec3();
-    quat.transformVector(pc.Vec3.FORWARD, v);
-    return Math.atan2(-v.x, -v.z) * pc.math.RAD_TO_DEG;
+    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._calcPitch = function (quat, yaw) {
-    var quatWithoutYaw = new pc.Quat();
-    var yawOffset = new pc.Quat();
-    yawOffset.setFromEulerAngles(0, -yaw, 0);
-    quatWithoutYaw.mul2(yawOffset, quat);
-    var v = new pc.Vec3();
-    quatWithoutYaw.transformVector(pc.Vec3.FORWARD, v);
-    return Math.atan2(-v.y, -v.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._clampDistance = function (d) {
-    if (this.distanceMax > 0) return pc.math.clamp(d, this.distanceMin, this.distanceMax);
-    return Math.max(d, this.distanceMin);
+
+// ----- FIXED PITCH CLAMPING -----
+// Clamp the pitch between pitchAngleMin and pitchAngleMax so that with your JSON values
+// (minAngle: -90, maxAngle: 0) the allowed pitch is between -90 (overhead) and 0 (horizontal).
+OrbitCamera.prototype._clampPitchAngle = function (pitch) {
+    return pc.math.clamp(pitch, this.pitchAngleMin, this.pitchAngleMax);
 };
 
-OrbitCamera.prototype._clampPitchAngle = function (p) {
-    return pc.math.clamp(p, this.pitchAngleMin, this.pitchAngleMax);
+OrbitCamera.prototype._clampYawAngle = function (yaw) {
+    return pc.math.clamp(yaw, -this.yawAngleMax, -this.yawAngleMin);
 };
 
-OrbitCamera.prototype._clampYawAngle = function (y) {
-    return pc.math.clamp(y, this.yawAngleMin, this.yawAngleMax);
+OrbitCamera.quatWithoutYaw = new pc.Quat();
+OrbitCamera.yawOffset = new pc.Quat();
+
+// ----- REVISED PITCH CALCULATION -----
+// Modify _calcPitch so that horizontal (looking straight ahead) returns 0,
+// and looking overhead returns -90.
+// This change ensures that with JSON (minAngle: -90, maxAngle: 0) the allowed pitch is strictly between -90 and 0.
+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);
+    // Here we swap the sign of the computed angle so that:
+    // - When the camera is horizontal, transformedForward.y is 0 and the result is 0.
+    // - When the camera is overhead, transformedForward.y is negative and the result is -90.
+    return Math.atan2(-transformedForward.y, -transformedForward.z) * pc.math.RAD_TO_DEG;
 };
 
+
 ////////////////////////////////////////////////////////////////////////////////
-//        Clamp pitch during input to prevent flip only when needed          //
+//                       Orbit Camera Mouse Input Script                      //
 ////////////////////////////////////////////////////////////////////////////////
+var OrbitCameraInputMouse = pc.createScript('orbitCameraInputMouse');
 
-// Override OrbitCameraInputMouse and OrbitCameraInputTouch to inject logic directly below
-
-pc.script.create('orbitCameraInputMouse', function (app) {
-    var script = function (entity) {
-        this.entity = entity;
-        this.orbitCamera = entity.script.orbitCamera;
-        this.lookButtonDown = false;
-        this.lastPoint = new pc.Vec2();
-    };
-
-    script.prototype.initialize = function () {
+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'
+});
+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);
-    };
-
-    script.prototype.onMouseDown = function (event) {
-        if (event.button === pc.MOUSEBUTTON_RIGHT) this.lookButtonDown = true;
-    };
-
-    script.prototype.onMouseUp = function (event) {
-        if (event.button === pc.MOUSEBUTTON_RIGHT) this.lookButtonDown = false;
-    };
-
-    script.prototype.onMouseMove = function (event) {
-        if (!this.lookButtonDown) return;
-
-        var camera = this.orbitCamera;
-        camera.pitch -= event.dy * 0.3;
-        camera.yaw   -= event.dx * 0.3;
+        this.app.mouse.on(pc.EVENT_MOUSEWHEEL, this.onMouseWheel, this);
+        window.addEventListener('mouseout', onMouseOut, false);
+        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);
+        });
+    }
+    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;
+    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);
+    var pitchRadians = this.orbitCamera.pitch * pc.math.DEG_TO_RAD;
+    var minPivotY = this.orbitCamera.distance * Math.sin(pitchRadians);
+    if (this.orbitCamera.pivotPoint.y < minPivotY) {
+        this.orbitCamera.pivotPoint.y = minPivotY;
+    }
+};
+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(new pc.Vec2(event.x, event.y));
+    }
+    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;
+};
 
-        var r = camera.pitch * pc.math.DEG_TO_RAD;
-        var candY = camera.pivotPoint.y + Math.sin(r) * camera.distance;
 
-        if (candY < camera.minY) {
-            var maxRad = Math.asin(
-                pc.math.clamp((camera.minY - camera.pivotPoint.y) / camera.distance, -1, 1)
-            );
-            var clampedPitch = maxRad * pc.math.RAD_TO_DEG;
-            camera.pitch = clampedPitch;
-            camera._targetPitch = clampedPitch;
-        }
-    };
+////////////////////////////////////////////////////////////////////////////////
+//                       Orbit Camera Touch Input Script                      //
+////////////////////////////////////////////////////////////////////////////////
+var OrbitCameraInputTouch = pc.createScript('orbitCameraInputTouch');
 
-    return script;
+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'
+});
+OrbitCameraInputTouch.prototype.initialize = function () {
+    this.orbitCamera = this.entity.script.orbitCamera;
+    this.lastTouchPoint = new pc.Vec2();
+    this.lastPinchMidPoint = new pc.Vec2();
+    this.lastPinchDistance = 0;
+    if (this.orbitCamera && this.app.touch) {
+        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) {
+    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) {
+    var touches = event.touches;
+    if (touches.length === 1) {
+        this.lastTouchPoint.set(touches[0].x, touches[0].y);
+    } else if (touches.length === 2) {
+        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;
+    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);
+    var pitchRadians = this.orbitCamera.pitch * pc.math.DEG_TO_RAD;
+    var minPivotY = this.orbitCamera.distance * Math.sin(pitchRadians);
+    if (this.orbitCamera.pivotPoint.y < minPivotY) {
+        this.orbitCamera.pivotPoint.y = minPivotY;
+    }
+};
+OrbitCameraInputTouch.pinchMidPoint = new pc.Vec2();
+OrbitCameraInputTouch.prototype.onTouchMove = function (event) {
+    var pinchMidPoint = OrbitCameraInputTouch.pinchMidPoint;
+    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) {
+        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);
+        this.calcMidPoint(touches[0], touches[1], pinchMidPoint);
+        this.pan(pinchMidPoint);
+        this.lastPinchMidPoint.copy(pinchMidPoint);
+    }
+};