Update orbit-camera.js

orbit-camera.js

@@ -1,3 +1,4 @@
+// orbit-camera.js
 ///////////////////////////////////////////////////////////////////////////////
 //                             Orbit Camera Script                            //
 ////////////////////////////////////////////////////////////////////////////////
@@ -34,9 +35,7 @@ OrbitCamera.attributes.add('frameOnStart', {
     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
+// distance property
 Object.defineProperty(OrbitCamera.prototype, 'distance', {
     get: function () {
         return this._targetDistance;
@@ -46,7 +45,7 @@ Object.defineProperty(OrbitCamera.prototype, 'distance', {
     }
 });
 
-// Property to get and set the camera orthoHeight (clamped above 0)
+// orthoHeight property
 Object.defineProperty(OrbitCamera.prototype, 'orthoHeight', {
     get: function () {
         return this.entity.camera.orthoHeight;
@@ -56,22 +55,18 @@ Object.defineProperty(OrbitCamera.prototype, 'orthoHeight', {
     }
 });
 
-
-// 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).
+// pitch property with diagnostic log
 Object.defineProperty(OrbitCamera.prototype, 'pitch', {
     get: function () {
         return this._targetPitch;
     },
     set: function (value) {
+        console.debug('[OrbitCamera] pitch setter input:', value);
         this._targetPitch = this._clampPitchAngle(value);
     }
 });
 
-
-// Property to get and set the yaw (in degrees) of the camera around the pivot.
+// yaw property
 Object.defineProperty(OrbitCamera.prototype, 'yaw', {
     get: function () {
         return this._targetYaw;
@@ -81,8 +76,7 @@ Object.defineProperty(OrbitCamera.prototype, 'yaw', {
     }
 });
 
-
-// Property to get and set the world position of the pivot point that the camera orbits around.
+// pivotPoint property
 Object.defineProperty(OrbitCamera.prototype, 'pivotPoint', {
     get: function () {
         return this._pivotPoint;
@@ -92,13 +86,11 @@ Object.defineProperty(OrbitCamera.prototype, 'pivotPoint', {
     }
 });
 
-
-// Moves the camera to look at an entity and all its children so they are all in view.
+// focus method
 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));
+    var half = this._modelsAabb.halfExtents;
+    var radius = Math.max(half.x, Math.max(half.y, half.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);
@@ -106,18 +98,18 @@ OrbitCamera.prototype.focus = function (focusEntity) {
 
 OrbitCamera.distanceBetween = new pc.Vec3();
 
-// Set the camera position to a world position and look at a world position.
+// resetAndLookAtPoint
 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();
+    var d = OrbitCamera.distanceBetween;
+    d.sub2(lookAtPoint, resetPoint);
+    this.distance = d.length();
     this.pivotPoint.copy(lookAtPoint);
-    var cameraQuat = this.entity.getRotation();
-    this.yaw = this._calcYaw(cameraQuat);
-    this.pitch = this._calcPitch(cameraQuat, this.yaw);
+    var quat = this.entity.getRotation();
+    this.yaw = this._calcYaw(quat);
+    this.pitch = this._calcPitch(quat, this.yaw);
     this._removeInertia();
     this._updatePosition();
 };
@@ -138,387 +130,165 @@ OrbitCamera.prototype.resetToPosition = function (position, lookAtPoint) {
     this.entity.setPosition(position);
     this.entity.lookAt(lookAtPoint);
     this._pivotPoint.copy(lookAtPoint);
-    var distanceVec = new pc.Vec3();
-    distanceVec.sub2(position, lookAtPoint);
-    this._targetDistance = this._distance = distanceVec.length();
-    var cameraQuat = this.entity.getRotation();
-    this._targetYaw = this._yaw = this._calcYaw(cameraQuat);
-    this._targetPitch = this._pitch = this._calcPitch(cameraQuat, this._yaw);
+    var dv = new pc.Vec3();
+    dv.sub2(position, lookAtPoint);
+    this._targetDistance = this._distance = dv.length();
+    var cquat = this.entity.getRotation();
+    this._targetYaw = this._yaw = this._calcYaw(cquat);
+    this._targetPitch = this._pitch = this._calcPitch(cquat, this._yaw);
     this._removeInertia();
     this._updatePosition();
 };
 
-
 ////////////////////////////////////////////////////////////////////////////////
 //                          Private Methods                                 //
 ////////////////////////////////////////////////////////////////////////////////
 
 OrbitCamera.prototype.initialize = function () {
     var self = this;
-    var onWindowResize = function () {
+    var onResize = function () {
         self._checkAspectRatio();
     };
-
-    window.addEventListener('resize', onWindowResize, false);
+    window.addEventListener('resize', onResize, false);
     this._checkAspectRatio();
     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);
-    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));
+    var cq = this.entity.getRotation();
+    this._yaw = this._calcYaw(cq);
+    this._pitch = this._clampPitchAngle(this._calcPitch(cq, this._yaw));
     this.entity.setLocalEulerAngles(this._pitch, this._yaw, 0);
     this._distance = 0;
     this._targetYaw = this._yaw;
     this._targetPitch = this._pitch;
-
     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());
+        var distBox = new pc.Vec3();
+        distBox.sub2(this.entity.getPosition(), this._pivotPoint);
+        this._distance = this._clampDistance(distBox.length());
     }
-
     this._targetDistance = this._distance;
-
-    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:distanceMin', function () { this._distance = this._clampDistance(this._distance); });
+    this.on('attr:distanceMax', function () { this._distance = this._clampDistance(this._distance); });
+    this.on('attr:pitchAngleMin', function () { this._pitch = this._clampPitchAngle(this._pitch); });
+    this.on('attr:pitchAngleMax', function () { this._pitch = this._clampPitchAngle(this._pitch); });
+    this.on('attr:focusEntity', function (v) {
+        if (this.frameOnStart) this.focus(v || this.app.root);
+        else this.resetAndLookAtEntity(this.entity.getPosition(), v || this.app.root);
     });
-    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('attr:frameOnStart', function (v) {
+        if (v) this.focus(this.focusEntity || this.app.root);
     });
     this.on('destroy', function () {
-        window.removeEventListener('resize', onWindowResize, false);
+        window.removeEventListener('resize', onResize, false);
     });
 };
 
 OrbitCamera.prototype.update = function (dt) {
     var t = this.inertiaFactor === 0 ? 1 : Math.min(dt / this.inertiaFactor, 1);
+    // inertia lerp
     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._yaw      = pc.math.lerp(this._yaw,      this._targetYaw,      t);
+    this._pitch    = pc.math.lerp(this._pitch,    this._targetPitch,    t);
+
+    // diagnostic: computed candidate pitch & resulting world-Y
+    var rad = this._pitch * pc.math.DEG_TO_RAD;
+    var candY = this._pivotPoint.y + Math.sin(rad) * this._distance;
+    console.debug('[OrbitCamera] update: _pitch=', this._pitch.toFixed(2),
+                  'candY=', candY.toFixed(2), 'minY=', this.minY);
+
+    // clamp downward orbit
+    if (candY < this.minY) {
+        var maxRad = Math.asin(Math.max(-1, Math.min(1, (this.minY - this._pivotPoint.y) / this._distance)));
+        var maxDeg = maxRad * pc.math.RAD_TO_DEG;
+        console.debug('[OrbitCamera] clamping pitch from', this._pitch.toFixed(2), 'to', maxDeg.toFixed(2));
+        this._pitch = maxDeg;
+        this._targetPitch = maxDeg;
+    }
+
     this._updatePosition();
 };
 
 OrbitCamera.prototype._updatePosition = function () {
     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);
-    // 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);
+    var pos = this.entity.getPosition();
+    pos.copy(this.entity.forward);
+    pos.mulScalar(-this._distance);
+    pos.add(this.pivotPoint);
+    // ensure no under-floor
+    pos.y = Math.max(pos.y, this.minY);
+    this.entity.setPosition(pos);
 };
 
 OrbitCamera.prototype._removeInertia = function () {
-    this._yaw = this._targetYaw;
-    this._pitch = this._targetPitch;
+    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;
-    this.entity.camera.horizontalFov = (height > width);
+    var h = this.app.graphicsDevice.height;
+    var w = this.app.graphicsDevice.width;
+    this.entity.camera.horizontalFov = (h > w);
 };
 
 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 meshes = [];
+    var rs = entity.findComponents('render');
+    for (var i=0; i<rs.length; i++) {
+        for (var m=0; m<rs[i].meshInstances.length; m++) {
+            meshes.push(rs[i].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 ms = entity.findComponents('model');
+    for (i=0; i<ms.length; i++) {
+        for (m=0; m<ms[i].meshInstances.length; m++) {
+            meshes.push(ms[i].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);
-        }
+    var gs = entity.findComponents('gsplat');
+    for (i=0; i<gs.length; i++) {
+        var inst = gs[i].instance;
+        if (inst && inst.meshInstance) meshes.push(inst.meshInstance);
     }
-    for (i = 0; i < meshInstances.length; i++) {
-        if (i === 0) {
-            this._modelsAabb.copy(meshInstances[i].aabb);
-        } else {
-            this._modelsAabb.add(meshInstances[i].aabb);
-        }
+    for (i=0; i<meshes.length; i++) {
+        if (i===0) this._modelsAabb.copy(meshes[i].aabb);
+        else this._modelsAabb.add(meshes[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;
+    var v = new pc.Vec3();
+    quat.transformVector(pc.Vec3.FORWARD, v);
+    return Math.atan2(-v.x, -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.yawAngleMax, -this.yawAngleMin);
 };
 
 OrbitCamera.quatWithoutYaw = new pc.Quat();
-OrbitCamera.yawOffset = 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;
-};
-
-
-////////////////////////////////////////////////////////////////////////////////
-//                       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'
-});
-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);
-        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;
-};
-
-
-////////////////////////////////////////////////////////////////////////////////
-//                       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'
-});
-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;
-    }
+    var q = OrbitCamera.quatWithoutYaw;
+    var yo = OrbitCamera.yawOffset;
+    yo.setFromEulerAngles(0, -yaw, 0);
+    q.mul2(yo, quat);
+    var v = new pc.Vec3();
+    q.transformVector(pc.Vec3.FORWARD, v);
+    return Math.atan2(-v.y, -v.z) * pc.math.RAD_TO_DEG;
 };
-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);
-    }
-};