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copied!<p>OK, so, as I mentioned above for something like this, one possible answer is to use the CCLens3D class to get the "effect" of magnifying something in a circular manner.</p> <p>I found using this to be a little tricky because it doesn't seem to work unless it's a child of the top level node of your 'scene'.</p> <p>Here is some code I use to create a lens that moves around the screen, and then disappears:</p> <pre><code> // Create the lens object first. // CCLens3D *lens = [CCLens3D actionWithPosition:fromPos radius:50 grid:ccg(50, 50) duration:2.0]; // Set the "size" of the lens effect to suit your needs. // [lens setLensEffect:1.0]; // In my case, I then move the lens to a new position. To apply an action on // a lens, you need to give the actions to the actionManager in the // CCDirector instance. // CCMoveTo *move = [CCMoveTo actionWithDuration:2.0 position:toPos]; // I had another action in this array, but this will do. // CCSequence *seq = [CCSequence actions:move, nil]; // Now tell the actionManager to move the lens. This is odd, but it works. // [[[CCDirector sharedDirector] actionManager] addAction:seq target:lens paused:NO]; // Now just for some more weirdness, to actually make the lens appear and operate // you run it as an action on the node it would normally be a child of. In my case // 'self' is the CCLayer object that is the root of the current scene. // // Note that the first action is the lens itself, and the second is a special // one that stops the lens (which is a "grid" object). // [self runAction:[CCSequence actions:lens, [CCStopGrid action], nil]]; </code></pre> <p>I imagine that you should be able to stop the grid by running the CCStopGrid action when you want to. In my case it is a programmed thing. In yours it might be when the user lets go of a button.</p>

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