[away3d] Getting Mouse Co-ordinates

[Bobby]

Hi,
   I am facing a with getting the mouse co-ordinates from the scene.


I will explain the scenario first. I am developing an application
which involves drawing a 2D floor plan and then developing the 3D
model. The creation of the 3D model is done using extrusion.
While the application is almost complete. I am facing a problem/bug in
creation of 2D floor plan. To the best of my knowledge the bug is
caused to error I am making in mapping the mouse co-ordinates on the
screen to 3D space. I read the many discussions in the forum but my
knowledge of 3D math is limited and I cannot fully follow. The 2D
floor plan is drawn on X -Y plane. HoverCamera is used. Pan angle is
180 and tilt is zero. The camera positions are

_camera.x = -100;
_camera.y = 100;
_camera.z = 0;

There is a an offset between the position I am pressing and where the
lines are appearing. Please do try out the code to see the offset.

My deadline is very near. So please help.

I am pasting the code below:


********************************************************************************************
package
{
    import away3d.cameras.*;
    import away3d.containers.*;

    import flash.display.*;
    import flash.events.*;


    public class ExtrusionBaseClass extends Sprite
    {
        protected var _view : View3D;
        protected var _camera : HoverCamera3D;


        public function ExtrusionBaseClass()
        {
            _createView();
            _createScene();
        }

        protected function _createView() : void
        {
            _camera = new HoverCamera3D();

            _camera.tiltAngle = 0;
            _camera.panAngle = 180;

            _view = new View3D();
            _view.x = 400;
            _view.y = 300;
            _view.camera = _camera;

            addChild(_view);
            addEventListener(Event.ENTER_FRAME, _onEnterFrame);
        }

        protected function _createScene() : void
        {

        }

        protected function _onEnterFrame(ev : Event) : void
        {

           _camera.hover();
           _view.render();
        }
    }
}
*********************************************************************************
package {
        import away3d.cameras.*;
        import away3d.containers.*;
        import away3d.core.base.*;
        import away3d.core.geom.*;
        import away3d.core.math.*;
        import away3d.extrusions.*;
        import away3d.materials.*;
        import away3d.primitives.*;

        import flash.display.*;
        import flash.events.*;
        import flash.utils.*;

        import wumedia.vector.*;

        public class ExtrusionKitchenProject1 extends ExtrusionBaseClass
        {

                private var VerdanaSwf : Class;
                private var _xpos:Array = new Array();
                private var _ypos:Array = new Array();
                private var sides:Number = 1;
                private var init:Boolean = true;
                private var firstTime:Boolean = true;
                private var mesh:Mesh = new Mesh();
                private var i:uint=0;
                var segment0:Segment = new Segment();
                var material:Material = new ColorMaterial(0xfff000);
                var material1:WireColorMaterial = new 
WireColorMaterial(0x123ff0);
                var segment1:Segment = new Segment();



                public function ExtrusionKitchenProject1()
                {
                        super();
                }

                override protected function _createScene() : void
                {


                        mesh.bothsides = true;
                        var material : WireColorMaterial = new 
WireColorMaterial(0xFF0000);
                        material.wireColor = 0x000000;
                        material.thickness = 2;
                        mesh.material = material;
                        _view.scene.addChild(mesh);

                        _camera.x = -100;
                        _camera.y = 100;
                        _camera.z = 0;

                        segment0.moveTo(-400,100,0);
                        segment0.lineTo(200, 100,0);
                        segment0.moveTo(-100,300,0);
                        segment0.lineTo(-100,-100,0);

                        mesh.addSegment(segment0);


                        stage.addEventListener(MouseEvent.MOUSE_DOWN, 
onMouseDown);



                }

                public function onMouseDown(event:MouseEvent):void {

                        if(firstTime)
                        {

                                _xpos[i] = _view.mouseX;
                                _ypos[i] = _view.mouseY;
                                firstTime = false;


                                i++;


                        }
                        else
                        {
                                _xpos[i] = _view.mouseX;
                                _ypos[i] = _view.mouseY;

                                segment1.moveTo(_xpos[i-1],- _ypos[i-1],0);
                                segment1.lineTo(_xpos[i],-_ypos[i],0);
                                mesh.addSegment(segment1);


                                i++;


                        }

                }
        }
}