mouse position

Software: Away3D 3.x
robg, Newbie
Posted: 24 November 2011 11:43 AM   Total Posts: 2

i haven’t been entirely sure what to google or search for to help solve my problem, really hoping someone here can help a little…

currently my scene has a massive sphere with a texture mapped to it and the camera at the center of the sphere.

i’d like a way to click on the polygons within the sphere and update the texture at that position with something and dot etc..

the only part of the process where i need help is converting the 2d mouse position to a point on the inside of the sphere.

hope this makes sense…

   
robg, Newbie
Posted: 28 November 2011 03:00 PM   Total Posts: 2   [ # 1 ]

after a bit more reading it appears i need to work out how to cast a ray then work out the point of intersection with a sphere..

any ponters?

   
Avatar
Apprentice, Jr. Member
Posted: 28 November 2011 03:47 PM   Total Posts: 45   [ # 2 ]

As JohnBrookes pointed out here: http://away3d.com/forum/viewthread/1457/  -> check the Ray class in tools.utils, it also has a function called ‘intersectsSphere’, which might be what you need.

   
John Brookes, Moderator
Posted: 28 November 2011 05:14 PM   Total Posts: 732   [ # 3 ]

Think with this one (drawing on the bitmap) you might be better just using the mouseDetails.

not tried this on the inside of a sphere but works on the outside.
eg

bmMaterial = new BitmapMaterial(new imgAsset().bitmapData);
 bmMaterial.lights = lights;

 
 earth = new Sphere(bmMaterial, 250, 32, 24);
 scene.addChild(earth);
 earth.mouseEnabled = true;
 earth.mouseDetails = true;
 
 earth.addEventListener(MouseEvent3D.MOUSE_DOWN, earthMouseHandler);
}

private function earthMouseHandler(e:MouseEvent3D):void 
{
 var c:Shape= new Shape();
 c.graphics.clear();
 c.graphics.beginFill(0xFFFFFF,0.5);
 c.graphics.lineStyle(1.0);
 c.graphics.drawEllipse(bmMaterial.bitmapData.width*e.uv.x, bmMaterial.bitmapData.height*e.uv.y, 6,12);
 c.graphics.endFill();
 
 var bd:BitmapData = bmMaterial.bitmapData.clone();
 bd.draw(c);
 bmMaterial.bitmapData = bd;
} 

With the above there would be an issue where the image joins (where the two ends meet on the sphere) and drawing on both ends.
With a bit of thinking you can solve it wink

   
 
   
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