Added event.preventDefault to TrackballControls as per suggestion in #1986.

build/Three.js

@@ -615,7 +615,8 @@ d.setFromAxisAngle(b,-a);d.multiplyVector3(g);d.multiplyVector3(c.object.up);d.m
 b.addSelf(c.object.up.clone().setLength(a.y));c.object.position.addSelf(b);c.target.addSelf(b);c.staticMoving?o=m:o.addSelf(a.sub(m,o).multiplyScalar(c.dynamicDampingFactor))}};this.checkDistances=function(){if(!c.noZoom||!c.noPan){c.object.position.lengthSq()>c.maxDistance*c.maxDistance&&c.object.position.setLength(c.maxDistance);g.lengthSq()<c.minDistance*c.minDistance&&c.object.position.add(c.target,g.setLength(c.minDistance))}};this.update=function(){g.copy(c.object.position).subSelf(c.target);
 c.noRotate||c.rotateCamera();c.noZoom||c.zoomCamera();c.noPan||c.panCamera();c.object.position.add(c.target,g);c.checkDistances();c.object.lookAt(c.target);if(d.distanceTo(c.object.position)>0){c.dispatchEvent(p);d.copy(c.object.position)}};this.domElement.addEventListener("contextmenu",function(a){a.preventDefault()},false);this.domElement.addEventListener("mousemove",function(a){if(c.enabled){if(e){h=i=c.getMouseProjectionOnBall(a.clientX,a.clientY);j=l=c.getMouseOnScreen(a.clientX,a.clientY);o=
 m=c.getMouseOnScreen(a.clientX,a.clientY);e=false}f!==-1&&(f===0&&!c.noRotate?i=c.getMouseProjectionOnBall(a.clientX,a.clientY):f===1&&!c.noZoom?l=c.getMouseOnScreen(a.clientX,a.clientY):f===2&&!c.noPan&&(m=c.getMouseOnScreen(a.clientX,a.clientY)))}},false);this.domElement.addEventListener("mousedown",function(a){if(c.enabled){a.preventDefault();a.stopPropagation();if(f===-1){f=a.button;f===0&&!c.noRotate?h=i=c.getMouseProjectionOnBall(a.clientX,a.clientY):f===1&&!c.noZoom?j=l=c.getMouseOnScreen(a.clientX,
-a.clientY):this.noPan||(o=m=c.getMouseOnScreen(a.clientX,a.clientY))}}},false);this.domElement.addEventListener("mouseup",function(a){if(c.enabled){a.preventDefault();a.stopPropagation();f=-1}},false);window.addEventListener("keydown",function(a){if(c.enabled&&f===-1){a.keyCode===c.keys[0]&&!c.noRotate?f=0:a.keyCode===c.keys[1]&&!c.noZoom?f=1:a.keyCode===c.keys[2]&&!c.noPan&&(f=2);f!==-1&&(e=true)}},false);window.addEventListener("keyup",function(){c.enabled&&f!==-1&&(f=-1)},false)};
+a.clientY):this.noPan||(o=m=c.getMouseOnScreen(a.clientX,a.clientY))}}},false);this.domElement.addEventListener("mouseup",function(a){if(c.enabled){a.preventDefault();a.stopPropagation();f=-1}},false);window.addEventListener("keydown",function(a){if(c.enabled){a.preventDefault();if(f===-1){a.keyCode===c.keys[0]&&!c.noRotate?f=0:a.keyCode===c.keys[1]&&!c.noZoom?f=1:a.keyCode===c.keys[2]&&!c.noPan&&(f=2);f!==-1&&(e=true)}}},false);window.addEventListener("keyup",function(){c.enabled&&f!==-1&&(f=-1)},
+false)};
 THREE.OrbitControls=function(a,b){var c,d,e;function f(){return 2*Math.PI/60/60*i.autoRotateSpeed}function g(a){a.preventDefault();if(s===c){o.set(a.clientX,a.clientY);m.sub(o,l);i.rotateLeft(2*Math.PI*m.x/j*i.userRotateSpeed);i.rotateUp(2*Math.PI*m.y/j*i.userRotateSpeed);l.copy(o)}else if(s===d){r.set(a.clientX,a.clientY);n.sub(r,p);n.y>0?i.zoomIn():i.zoomOut();p.copy(r)}}function h(){if(i.userRotate){document.removeEventListener("mousemove",g,false);document.removeEventListener("mouseup",h,false);
 s=e}}THREE.EventTarget.call(this);this.object=a;this.domElement=b!==void 0?b:document;this.center=new THREE.Vector3;this.userZoom=true;this.userZoomSpeed=1;this.userRotate=true;this.userRotateSpeed=1;this.autoRotate=false;this.autoRotateSpeed=2;var i=this,j=1800,l=new THREE.Vector2,o=new THREE.Vector2,m=new THREE.Vector2,p=new THREE.Vector2,r=new THREE.Vector2,n=new THREE.Vector2,q=0,t=0,u=1,w=new THREE.Vector3;e=-1;c=0;d=1;var s=e,x={type:"change"};this.rotateLeft=function(a){a===void 0&&(a=f());
 t=t-a};this.rotateRight=function(a){a===void 0&&(a=f());t=t+a};this.rotateUp=function(a){a===void 0&&(a=f());q=q-a};this.rotateDown=function(a){a===void 0&&(a=f());q=q+a};this.zoomIn=function(a){a===void 0&&(a=Math.pow(0.95,i.userZoomSpeed));u=u/a};this.zoomOut=function(a){a===void 0&&(a=Math.pow(0.95,i.userZoomSpeed));u=u*a};this.update=function(){var a=this.object.position,b=a.clone().subSelf(this.center),c=Math.atan2(b.x,b.z),d=Math.atan2(Math.sqrt(b.x*b.x+b.z*b.z),b.y);this.autoRotate&&this.rotateLeft(f());

build/custom/ThreeExtras.js

@@ -172,7 +172,8 @@ d.setFromAxisAngle(b,-a);d.multiplyVector3(g);d.multiplyVector3(c.object.up);d.m
 b.addSelf(c.object.up.clone().setLength(a.y));c.object.position.addSelf(b);c.target.addSelf(b);c.staticMoving?n=k:n.addSelf(a.sub(k,n).multiplyScalar(c.dynamicDampingFactor))}};this.checkDistances=function(){if(!c.noZoom||!c.noPan){c.object.position.lengthSq()>c.maxDistance*c.maxDistance&&c.object.position.setLength(c.maxDistance);g.lengthSq()<c.minDistance*c.minDistance&&c.object.position.add(c.target,g.setLength(c.minDistance))}};this.update=function(){g.copy(c.object.position).subSelf(c.target);
 c.noRotate||c.rotateCamera();c.noZoom||c.zoomCamera();c.noPan||c.panCamera();c.object.position.add(c.target,g);c.checkDistances();c.object.lookAt(c.target);if(d.distanceTo(c.object.position)>0){c.dispatchEvent(m);d.copy(c.object.position)}};this.domElement.addEventListener("contextmenu",function(a){a.preventDefault()},false);this.domElement.addEventListener("mousemove",function(a){if(c.enabled){if(e){h=i=c.getMouseProjectionOnBall(a.clientX,a.clientY);j=l=c.getMouseOnScreen(a.clientX,a.clientY);n=
 k=c.getMouseOnScreen(a.clientX,a.clientY);e=false}f!==-1&&(f===0&&!c.noRotate?i=c.getMouseProjectionOnBall(a.clientX,a.clientY):f===1&&!c.noZoom?l=c.getMouseOnScreen(a.clientX,a.clientY):f===2&&!c.noPan&&(k=c.getMouseOnScreen(a.clientX,a.clientY)))}},false);this.domElement.addEventListener("mousedown",function(a){if(c.enabled){a.preventDefault();a.stopPropagation();if(f===-1){f=a.button;f===0&&!c.noRotate?h=i=c.getMouseProjectionOnBall(a.clientX,a.clientY):f===1&&!c.noZoom?j=l=c.getMouseOnScreen(a.clientX,
-a.clientY):this.noPan||(n=k=c.getMouseOnScreen(a.clientX,a.clientY))}}},false);this.domElement.addEventListener("mouseup",function(a){if(c.enabled){a.preventDefault();a.stopPropagation();f=-1}},false);window.addEventListener("keydown",function(a){if(c.enabled&&f===-1){a.keyCode===c.keys[0]&&!c.noRotate?f=0:a.keyCode===c.keys[1]&&!c.noZoom?f=1:a.keyCode===c.keys[2]&&!c.noPan&&(f=2);f!==-1&&(e=true)}},false);window.addEventListener("keyup",function(){c.enabled&&f!==-1&&(f=-1)},false)};
+a.clientY):this.noPan||(n=k=c.getMouseOnScreen(a.clientX,a.clientY))}}},false);this.domElement.addEventListener("mouseup",function(a){if(c.enabled){a.preventDefault();a.stopPropagation();f=-1}},false);window.addEventListener("keydown",function(a){if(c.enabled){a.preventDefault();if(f===-1){a.keyCode===c.keys[0]&&!c.noRotate?f=0:a.keyCode===c.keys[1]&&!c.noZoom?f=1:a.keyCode===c.keys[2]&&!c.noPan&&(f=2);f!==-1&&(e=true)}}},false);window.addEventListener("keyup",function(){c.enabled&&f!==-1&&(f=-1)},
+false)};
 THREE.OrbitControls=function(b,a){var c,d,e;function f(){return 2*Math.PI/60/60*i.autoRotateSpeed}function g(a){a.preventDefault();if(o===c){n.set(a.clientX,a.clientY);k.sub(n,l);i.rotateLeft(2*Math.PI*k.x/j*i.userRotateSpeed);i.rotateUp(2*Math.PI*k.y/j*i.userRotateSpeed);l.copy(n)}else if(o===d){p.set(a.clientX,a.clientY);q.sub(p,m);q.y>0?i.zoomIn():i.zoomOut();m.copy(p)}}function h(){if(i.userRotate){document.removeEventListener("mousemove",g,false);document.removeEventListener("mouseup",h,false);
 o=e}}THREE.EventTarget.call(this);this.object=b;this.domElement=a!==void 0?a:document;this.center=new THREE.Vector3;this.userZoom=true;this.userZoomSpeed=1;this.userRotate=true;this.userRotateSpeed=1;this.autoRotate=false;this.autoRotateSpeed=2;var i=this,j=1800,l=new THREE.Vector2,n=new THREE.Vector2,k=new THREE.Vector2,m=new THREE.Vector2,p=new THREE.Vector2,q=new THREE.Vector2,r=0,s=0,t=1,v=new THREE.Vector3;e=-1;c=0;d=1;var o=e,x={type:"change"};this.rotateLeft=function(a){a===void 0&&(a=f());
 s=s-a};this.rotateRight=function(a){a===void 0&&(a=f());s=s+a};this.rotateUp=function(a){a===void 0&&(a=f());r=r-a};this.rotateDown=function(a){a===void 0&&(a=f());r=r+a};this.zoomIn=function(a){a===void 0&&(a=Math.pow(0.95,i.userZoomSpeed));t=t/a};this.zoomOut=function(a){a===void 0&&(a=Math.pow(0.95,i.userZoomSpeed));t=t*a};this.update=function(){var a=this.object.position,b=a.clone().subSelf(this.center),c=Math.atan2(b.x,b.z),d=Math.atan2(Math.sqrt(b.x*b.x+b.z*b.z),b.y);this.autoRotate&&this.rotateLeft(f());

src/extras/controls/TrackballControls.js

@@ -258,6 +258,8 @@ THREE.TrackballControls = function ( object, domElement ) {
 
 		if ( ! _this.enabled ) return;
 
+		event.preventDefault();
+
 		if ( _state !== STATE.NONE ) {
 
 			return;