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TrackballControls: extend OrbitControls #17858

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TrackballControls: extend OrbitControls #17858

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23e93e7
OrbitControls: support trackball behavior
WestLangley Nov 3, 2019
49f4268
Merge branch 'dev' into dev_trackball_controls
WestLangley Nov 4, 2019
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121 changes: 95 additions & 26 deletions examples/js/controls/OrbitControls.js
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Original file line number Diff line number Diff line change
Expand Up @@ -28,6 +28,9 @@ THREE.OrbitControls = function ( object, domElement ) {
// "target" sets the location of focus, where the object orbits around
this.target = new THREE.Vector3();

// Set to true to enable trackball behavior
this.trackball = false;

// How far you can dolly in and out ( PerspectiveCamera only )
this.minDistance = 0;
this.maxDistance = Infinity;
Expand Down Expand Up @@ -68,6 +71,7 @@ THREE.OrbitControls = function ( object, domElement ) {

// Set to true to automatically rotate around the target
// If auto-rotate is enabled, you must call controls.update() in your animation loop
// auto-rotate is not supported for trackball behavior
this.autoRotate = false;
this.autoRotateSpeed = 2.0; // 30 seconds per round when fps is 60

Expand All @@ -86,6 +90,7 @@ THREE.OrbitControls = function ( object, domElement ) {
// for reset
this.target0 = this.target.clone();
this.position0 = this.object.position.clone();
this.quaternion0 = this.object.quaternion.clone();
this.zoom0 = this.object.zoom;

//
Expand All @@ -108,6 +113,7 @@ THREE.OrbitControls = function ( object, domElement ) {

scope.target0.copy( scope.target );
scope.position0.copy( scope.object.position );
scope.quaternion0.copy( scope.object.quaternion );
scope.zoom0 = scope.object.zoom;

};
Expand All @@ -116,6 +122,7 @@ THREE.OrbitControls = function ( object, domElement ) {

scope.target.copy( scope.target0 );
scope.object.position.copy( scope.position0 );
scope.object.quaternion.copy( scope.quaternion0 );
scope.object.zoom = scope.zoom0;

scope.object.updateProjectionMatrix();
Expand All @@ -139,49 +146,94 @@ THREE.OrbitControls = function ( object, domElement ) {
var lastPosition = new THREE.Vector3();
var lastQuaternion = new THREE.Quaternion();

var q = new THREE.Quaternion();
var vec = new THREE.Vector3();

return function update() {

var position = scope.object.position;

offset.copy( position ).sub( scope.target );

// rotate offset to "y-axis-is-up" space
offset.applyQuaternion( quat );
if ( scope.trackball ) {

// angle from z-axis around y-axis
spherical.setFromVector3( offset );
// rotate around screen-space y-axis

if ( scope.autoRotate && state === STATE.NONE ) {
if ( sphericalDelta.theta ) {

rotateLeft( getAutoRotationAngle() );
vec.set( 0, 1, 0 ).applyQuaternion( scope.object.quaternion );

}
var factor = ( scope.enableDamping ) ? scope.dampingFactor : 1;

q.setFromAxisAngle( vec, sphericalDelta.theta * factor );

scope.object.quaternion.premultiply( q );
offset.applyQuaternion( q );

}

// rotate around screen-space x-axis

if ( sphericalDelta.phi ) {

vec.set( 1, 0, 0 ).applyQuaternion( scope.object.quaternion );

var factor = ( scope.enableDamping ) ? scope.dampingFactor : 1;

if ( scope.enableDamping ) {
q.setFromAxisAngle( vec, sphericalDelta.phi * factor );

spherical.theta += sphericalDelta.theta * scope.dampingFactor;
spherical.phi += sphericalDelta.phi * scope.dampingFactor;
scope.object.quaternion.premultiply( q );
offset.applyQuaternion( q );

}

offset.multiplyScalar( scale );
offset.clampLength( scope.minDistance, scope.maxDistance );

} else {

spherical.theta += sphericalDelta.theta;
spherical.phi += sphericalDelta.phi;
// rotate offset to "y-axis-is-up" space
offset.applyQuaternion( quat );

}
if ( scope.autoRotate && state === STATE.NONE ) {

rotateLeft( getAutoRotationAngle() );

}

spherical.setFromVector3( offset );

if ( scope.enableDamping ) {

spherical.theta += sphericalDelta.theta * scope.dampingFactor;
spherical.phi += sphericalDelta.phi * scope.dampingFactor;

// restrict theta to be between desired limits
spherical.theta = Math.max( scope.minAzimuthAngle, Math.min( scope.maxAzimuthAngle, spherical.theta ) );
} else {

// restrict phi to be between desired limits
spherical.phi = Math.max( scope.minPolarAngle, Math.min( scope.maxPolarAngle, spherical.phi ) );
spherical.theta += sphericalDelta.theta;
spherical.phi += sphericalDelta.phi;

spherical.makeSafe();
}

// restrict theta to be between desired limits
spherical.theta = Math.max( scope.minAzimuthAngle, Math.min( scope.maxAzimuthAngle, spherical.theta ) );

// restrict phi to be between desired limits
spherical.phi = Math.max( scope.minPolarAngle, Math.min( scope.maxPolarAngle, spherical.phi ) );

spherical.makeSafe();

spherical.radius *= scale;
spherical.radius *= scale;

// restrict radius to be between desired limits
spherical.radius = Math.max( scope.minDistance, Math.min( scope.maxDistance, spherical.radius ) );
// restrict radius to be between desired limits
spherical.radius = Math.max( scope.minDistance, Math.min( scope.maxDistance, spherical.radius ) );

offset.setFromSpherical( spherical );

// rotate offset back to "camera-up-vector-is-up" space
offset.applyQuaternion( quatInverse );

}

// move target to panned location

Expand All @@ -195,14 +247,13 @@ THREE.OrbitControls = function ( object, domElement ) {

}

offset.setFromSpherical( spherical );
position.copy( scope.target ).add( offset );

// rotate offset back to "camera-up-vector-is-up" space
offset.applyQuaternion( quatInverse );
if ( scope.trackball === false ) {

position.copy( scope.target ).add( offset );
scope.object.lookAt( scope.target );

scope.object.lookAt( scope.target );
}

if ( scope.enableDamping === true ) {

Expand Down Expand Up @@ -1148,7 +1199,9 @@ THREE.OrbitControls = function ( object, domElement ) {

// force an update at start

this.object.lookAt( scope.target );
this.update();
this.saveState();

};

Expand Down Expand Up @@ -1178,3 +1231,19 @@ THREE.MapControls = function ( object, domElement ) {

THREE.MapControls.prototype = Object.create( THREE.EventDispatcher.prototype );
THREE.MapControls.prototype.constructor = THREE.MapControls;

//

THREE.TrackballControls = function ( object, domElement ) {

THREE.OrbitControls.call( this, object, domElement );

this.trackball = true;
this.screenSpacePanning = true;
this.autoRotate = false;

};

THREE.TrackballControls.prototype = Object.create( THREE.EventDispatcher.prototype );
THREE.TrackballControls.prototype.constructor = THREE.TrackballControls;

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