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@@ -402,6 +402,7 @@ THREE.TrackballControls = function ( object, domElement ) {
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switch ( event.pointerType ) {
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switch ( event.pointerType ) {
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case 'mouse':
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case 'mouse':
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+ case 'pen':
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onMouseDown( event );
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onMouseDown( event );
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break;
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break;
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@@ -418,6 +419,7 @@ THREE.TrackballControls = function ( object, domElement ) {
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switch ( event.pointerType ) {
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switch ( event.pointerType ) {
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case 'mouse':
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case 'mouse':
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+ case 'pen':
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onMouseMove( event );
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onMouseMove( event );
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break;
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break;
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@@ -434,6 +436,7 @@ THREE.TrackballControls = function ( object, domElement ) {
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switch ( event.pointerType ) {
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switch ( event.pointerType ) {
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case 'mouse':
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case 'mouse':
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+ case 'pen':
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onMouseUp( event );
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onMouseUp( event );
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break;
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break;
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