Three.JS Orbit Controls - enabling and disabling without position jumping

Question

I am creating a geometry manipulation prototype with Three.JS. I am using OrbitControls.JS to manipulate the camera and am having trouble enabling and disabling the controls.

Answer 1

I haven't been able to test it, but I think that you code should be

function onDocumentMouseDown( event ) 
{
// the following line would stop any other event handler from firing
// (such as the mouse's TrackballControls)
// event.preventDefault();

//console.log("Click.");
MOUSEDOWN = true;
// update the mouse variable
mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;

checkSelection();   
    if(editMode==2){
        controls.enabled = false;
        controls.rotate = false;
    }else{
        controls.enabled = true;
        controls.rotate = true;
        controls.onMouseDown (event);    // added this line to set the correct state
    }
}

Answer 2

UPDATE Q1 2019

noRotate is now deprecated, use enableRotate instead.

---

I figured it out! After looking closer at OrbitControls.JS, there is a "noRotate" flag that can be set that returns out of the rotate function, completely eliminating the creation of a start vector like I was talking about above.

Here is the working demo: http://moczys.com/webGL/Prototype_V02-05-2.html

And here is the code with changes commented:

function onDocumentMouseMove( event ) 
{
// the following line would stop any other event handler from firing
// (such as the mouse's TrackballControls)
//event.preventDefault();

// update the mouse variable
mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;


if(MOUSEDOWN&&editMode==2)
{
// Added to stop rotation while moving a vertex with the arrow handles
    controls.noRotate = true;

    var vector = new THREE.Vector3( mouse.x, mouse.y, 0.5 );
    projector.unprojectVector( vector, camera );

    var raycaster = new THREE.Raycaster( camera.position, vector.sub( camera.position ).normalize() );
    //lastPoint = vertexIntersects[0].object;
    var instance = vertexTargets.indexOf(lastPoint);
    if(vertexEdit==1){
        var intersects = raycaster.intersectObject(XYplane);

        vertexTargets[instance].position.x=intersects[0].point.x;
        targetList[0].geometry.vertices[instance].x=intersects[0].point.x;
        //console.log("x = "+intersects[0].point.x);
    }
    else if(vertexEdit==2){
        var intersects = raycaster.intersectObject(XYplane);
        vertexTargets[instance].position.y=intersects[0].point.y;
        targetList[0].geometry.vertices[instance].y=intersects[0].point.y;
        //console.log("y = "+intersects[0].point.y);
    }
    else if(vertexEdit==3){
        var intersects = raycaster.intersectObject(YZplane);
        vertexTargets[instance].position.z=intersects[0].point.z;
        targetList[0].geometry.vertices[instance].z=intersects[0].point.z;
        //console.log("z = "+intersects[0].point.z);
    }
    setAxisPosition(vertexTargets[instance].position.clone());
    var geom = targetList[0].geometry;
    geom.computeCentroids();
    geom.computeFaceNormals();
    geom.computeVertexNormals();
    geom.verticesNeedUpdate = true;
    geom.normalsNeedUpdate = true;
    updatePanels(targetList[0]);

}
}


function onDocumentMouseDown( event ) 
{
// the following line would stop any other event handler from firing
// (such as the mouse's TrackballControls)
// event.preventDefault();

//console.log("Click.");
MOUSEDOWN = true;
// update the mouse variable
mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
mouse.y = - ( event.clientY / window.innerHeight ) * 2 + 1;

checkSelection();   
if(editMode==2){
    //controls.enabled = false;
    //controls.rotate = false;

// Added here to disable rotation when the arrow handles are active
    controls.noRotate = true;
}
else{
    //controls.enabled = true;
    //controls.rotate = true;

// Added here to enable rotation all other times
    controls.noRotate = false;
}

}

function onDocumentMouseUp( event ) 
{
//event.preventDefault();
if (editMode!=2){
    //controls.enabled = true;
    //controls.rotate = true;
}
MOUSEDOWN = false;

// add here to enable rotation whenever the mouse button is lifted
controls.noRotate = false;

}

Hope somebody finds this useful!