Hi everyone, I want to zoom in on a 2D drawing in OpenGL and so I modify the clipping area when a button is pressed. The zoom algorithm is very simple:
float initialWidth=Math.abs(screenArea.maxX-screenArea.minX); screenArea.minY += zoomSize; screenArea.maxY -= zoomSize; float zoomedWidth=Math.abs(screenArea.maxY-screenArea.minY) *aspectRatio; screenArea.minX += (initialWidth-zoomedWidth)/2; screenArea.maxX -= (initialWidth-zoomedWidth)/2; gl.glOrthof(screenArea.minX, screenArea.maxX,screenArea.minY, screenArea.maxY, 1, -1); This goes very well up to a certain point, where screenArea.minX = 3096.8154f; screenArea.maxX = 3152.815f; screenArea.minY = 5648.5005f; screenArea.maxY = 5723.7495f; >From here on, there is no more zooming, but the whole image pans out on the Y axis (the pan is exponential: at the first click it moves a little, at the second click more, etc). PS: If I substract from every X coordonate in the scene minX and from every Y coordonate mixY (I translate the whole thing to origin) it works perfectly Any help would be greatly appreciated. Thanks in advance. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Beginners" group. To post to this group, send email to android-beginners@googlegroups.com To unsubscribe from this group, send email to [EMAIL PROTECTED] For more options, visit this group at http://groups.google.com/group/android-beginners?hl=en -~----------~----~----~----~------~----~------~--~---
