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ytr2345, Newbie
Posted: 11 September 2013 03:55 AM Total Posts: 22
Hi, how to make like this example (http://custom.sendra.com), it’s become drag when zoom to a limit and become rotate normal when zoom out of limit, anyone know that code?
Thanks.
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SharpEdge, Member
Posted: 11 September 2013 08:38 AM Total Posts: 94
[ # 1 ]
I think they used a simple HoverController for distant camera.
Instead for near camera an edited version of HoverController that keeps pan as is, and moves the target of LookAtController vertically of the offset generated by the mouse.
If you need a clearer explanation ask.
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ytr2345, Newbie
Posted: 11 September 2013 09:40 AM Total Posts: 22
[ # 2 ]
Thanks for reply but i’m really new in away so can you write that code for me? 
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SharpEdge, Member
Posted: 11 September 2013 10:52 AM Total Posts: 94
[ # 3 ]
NOT TESTED, i’ve not time right now, maybe later…
This is a really fast example, many controls and improvements are missing, this is just to give you an idea.
Usage: use it as any controller (but you don’t have to set manually the values because it gets them automatically).
create instance: camCtrl = new HoverDragController(view,camera);
update on enterframe: camCtrl.update();
import flash.events.Event;
import flash.events.MouseEvent;
import flash.geom.Vector3D;
import away3d.containers.View3D;
import away3d.controllers.HoverController;
import away3d.entities.Entity;
public class HoverDragController extends HoverController
{
private var _view : View3D;
private var _zoomThr : Number;
private var _move:Boolean = false;
private var _lastPanAngle:Number;
private var _lastTiltAngle:Number;
private var _lastMouseX:Number;
private var _lastMouseY:Number;
private var _newDistance : Number;
private var _lastVOffset : Number;
public function HoverDragController(view:View3D, targetObject:Entity=null, zoomThr:Number = 500, panAngle:Number=0, tiltAngle:Number=0, distance:Number=1000, minTiltAngle:Number=15, maxTiltAngle:Number=75, minPanAngle:Number=NaN, maxPanAngle:Number=NaN, steps:uint=8, yFactor:Number=2, wrapPanAngle:Boolean=false)
{
_view = view;
_zoomThr = zoomThr;
addListeners();
super(targetObject, null, panAngle, tiltAngle, distance, minTiltAngle, maxTiltAngle, minPanAngle, maxPanAngle, steps, yFactor, wrapPanAngle);
_newDistance = distance;
_lastPanAngle = panAngle;
_lastTiltAngle = tiltAngle;
}
public function dispose():void
{
removeListeners();
_view = null;
}
private function addListeners():void
{
// Setup event listeners
_view.addEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler);
_view.addEventListener(MouseEvent.MOUSE_UP, mouseUpHandler);
_view.addEventListener(MouseEvent.MOUSE_WHEEL, wheelZoomHandler, false, 0, true);
}
private function removeListeners():void
{
_view.removeEventListener(MouseEvent.MOUSE_DOWN, mouseDownHandler);
_view.removeEventListener(MouseEvent.MOUSE_UP, mouseUpHandler);
_view.removeEventListener(MouseEvent.MOUSE_WHEEL, wheelZoomHandler, false);
}
protected function wheelZoomHandler(event:MouseEvent):void
{
_newDistance *= 1 - (event.delta/10);
_newDistance = Math.max(50, Math.min(3000, _newDistance));
}
// --------------------------------------------------------------------------------------------------------------
/*** Mouse down handler */
private function mouseDownHandler(e:MouseEvent):void
{
_lastPanAngle = panAngle;
_lastTiltAngle = tiltAngle;
_lastVOffset = lookAtPosition.y;
_lastMouseX = _view.mouseX;
_lastMouseY = _view.mouseY;
_move = true;
_view.addEventListener(Event.MOUSE_LEAVE, onStageMouseLeave);
}
// --------------------------------------------------------------------------------------------------------------
// --------------------------------------------------------------------------------------------------------------
/*** Mouse up handler */
private function mouseUpHandler(e:MouseEvent):void
{
_move = false;
_view.removeEventListener(Event.MOUSE_LEAVE, onStageMouseLeave);
}
// --------------------------------------------------------------------------------------------------------------
// --------------------------------------------------------------------------------------------------------------
/*** Mouse stage leave handler */
private function onStageMouseLeave(e:Event):void
{
_move = false;
_view.removeEventListener(Event.MOUSE_LEAVE, onStageMouseLeave);
}
// --------------------------------------------------------------------------------------------------------------
override public function update(interpolate:Boolean=true):void
{
if(this.distance != _newDistance)
{
if(Math.abs(this.distance - _newDistance) > 0.001 && interpolate)
this.distance += (_newDistance - this.distance) * (_view.deltaTime/1000) * 2;
else
this.distance = _newDistance;
if(this.distance > _zoomThr)
{
//Where you want it to look when distant
this.lookAtPosition = new Vector3D();
}
else
{
this.tiltAngle = 0;
}
}
if(_move)
{
this.panAngle = 0.3 * (_view.mouseX - _lastMouseX) + _lastPanAngle;
if(distance > _zoomThr)
{
this.tiltAngle = 0.3 * (_view.mouseY - _lastMouseY) + _lastTiltAngle;
}
else
{
this.lookAtPosition.y = 0.5 * (_view.mouseY - _lastMouseY) + _lastVOffset;
}
}
super.update(interpolate);
}
}
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ytr2345, Newbie
Posted: 11 September 2013 12:43 PM Total Posts: 22
[ # 4 ]
It’s got error:
C:\Users\qwe\Documents\New Project2\src\HoverDragController.as(30): col: 4 Error: A super statement can be used only inside class instance constructors.
super(targetObject, null, panAngle, tiltAngle, distance, minTiltAngle, maxTiltAngle, minPanAngle, maxPanAngle, steps, yFactor, wrapPanAngle);
^
Build halted with errors (fcsh).
.
How to fix it?
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SharpEdge, Member
Posted: 11 September 2013 01:21 PM Total Posts: 94
[ # 5 ]
Ok i’ve updated the code, now i’ve tested it…obviously it’s not smoothed and good as the one you saw…
About the error, are you shure that you have copied the code inside a new HoverDragController.as file with the correct package?
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ytr2345, Newbie
Posted: 11 September 2013 01:47 PM Total Posts: 22
[ # 6 ]
I’ve update the code but still got that error.
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SharpEdge, Member
Posted: 11 September 2013 02:03 PM Total Posts: 94
[ # 7 ]
I’ve tested it with away 4.1.4, is the same version that are you using?
Have you added correct “package” statement?
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ytr2345, Newbie
Posted: 12 September 2013 03:15 AM Total Posts: 22
[ # 8 ]
OMG Thanks you so much SharpEdge, i did it, it work perfectly but only one thing, can you make it limit the drag? (sr because i’m asking you too much)
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SharpEdge, Member
Posted: 12 September 2013 09:40 AM Total Posts: 94
[ # 9 ]
Oh it’s really simple change the line at the end to:
This.lookatposition.y=math.max (MINOFFSET , Math.mim (MAXOFFSET, 0.5 * (_view.mouseY - _lastMouseY) + _lastVOffset));
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ytr2345, Newbie
Posted: 12 September 2013 10:48 AM Total Posts: 22
[ # 10 ]
Only one small problems yet, when zoom in, it change from rotate normal to drag very smooth but when zoom out, it’s hitch, not smooth, can you fix it?
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SharpEdge, Member
Posted: 12 September 2013 03:19 PM Total Posts: 94
[ # 11 ]
As i said is nowhere near a perfect solution…it should be done with another approach to get a performant control. I’ve not time now, sorry, but i think that you have a good starting point.
Maybe when i’m not busy i’ll write a better solution.
What i can say to help you solve your problem is to smooth the variation of “lookAtPosition”.
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ytr2345, Newbie
Posted: 17 September 2013 01:02 AM Total Posts: 22
[ # 12 ]
Thanks, please help me when you have free time.
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ytr2345, Newbie
Posted: 30 September 2013 03:37 AM Total Posts: 22
[ # 13 ]
Can anyone make it smooth when zoom out plz…
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