Away3D Forum View scale to Object scale size

View scale to Object scale size Software: Away3D 4.x

Darcey, Moderator Posted: 03 October 2012 12:00 AM Total Posts: 209 Hi, Anyone got any pointers on keeping an object (cube) which I have at the same size in true pixels as the Away3D 4.x view/scene resizes itself on browser/window resize? My goal is to resize a cube to an exact width and height which is specified in xml (so this is variable). I have hard coded this for full screen 1920x1080 but it would be nice so that I could match the pixel width of the 2D item when someone resizes the browser and not have the 3D element scale or undercale. Is there an equation that I can obtain to maintain an objects size no matter what width and height the view becomes? Process flow: 1. So my cube’s dimensions are initially 128x64 2. On cube selection it moves forward 800px 3. The cube’s pixel size is measured in photoshop as 2D is 530x265 4. Get xml target sizes - which are 640x480 5. Find % scale of cube so that it would match 2D object of 640x480 (TargetWidth/5.3)/100; // For width (TargetHeight/2.65)/100; // For height 6. Tween scaleX & Y of the cube targetX & Y using equation above. 7. PROBLEM: Screen resolution is not 1920x1080, equation no longer works as cube at stage 3 is no longer 530x265 and the act of measuring it’s 2D size is manual process…? Any ideas? Thanks Darcey
loth, Sr. Member Posted: 03 October 2012 07:52 AM Total Posts: 236 [ # 1 ] maybe this can help you http://www.everyday3d.com/blog/index.php/2008/07/07/pixel-precision-in-papervision3d/
Darcey, Moderator Posted: 03 October 2012 06:31 PM Total Posts: 209 [ # 2 ] Solved it but not using anything from camera etc, a tad messy but it works. //H = Height of browser/application // 1:2 Ratio var scaleYAt1080:Number = 3; // Verified visually even though cube is 128x64 - 2:1 var scaleYAt540:Number = 1.5; // Verified visually even though cube is 128x64 - 2:1 var scaleYDifferenceAt960From1080:Number = scaleYAt1080 - scaleYAt540; var scaleYPerPixel:Number = scaleYDifferenceAt960From1080/540; var heightDifferenceFrom1080:Number = 1080 - Variables.stage.stageHeight; var scaleDifferenceBasedOnHeight:Number = heightDifferenceFrom1080 * scaleYPerPixel; scalerY = scaleYAt1080 - scaleDifferenceBasedOnHeight; targetScaleY = (get2DTargetHeight()/scalerY)/100; scalerX = scalerY * 2; targetScaleX = (get2DTargetWidth()/scalerX)/100; cube.scaleX = targetScaleX; cube.scaleY = targetScaleY;

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