捏变焦GLSurfaceView [英] Pinch-Zoom with GLSurfaceView

问题描述

我有以下问题 -

我开发一个应用程序，我决定为GLSurfaceView，因为我需要一个OpenGL更好，更自然的页面卷曲动画。

I am developing an application and i decided for the GLSurfaceView because i needed openGl for a better and more natural page curl animation.

已经实现了，现在我发现自己活在一个有点问题，因为我无法找到任何形式的教程来实现对GLSurfaceView双指缩放。我捕获的事件，手指，规模等之间的距离......但我不知道如何执行实际的转换。

Having achieved that, now i find myself in a bit of a problem, since i cannot find a tutorial of any kind to implement pinch zoom on GLSurfaceView. I captured the event, the distances between fingers, scale, etc... But i do not know how to perform the actual transformation.

我发现了一个通过矩阵变换ImageView的，但很可惜......

I found the one transforming ImageView via matrix, but alas...

人做捏缩放在OpenGL？

Anyone done pinch zooming in openGl?

我不认为有什么需要张贴code，但我会做到这一点，如果将NELP你的回答。

I don't think there is any need to post the code, but i will do it if it will nelp you in answering.

推荐答案

您可以使用scalegesturedetector的概念来实现双指缩放，请参阅<一href="http://android-developers.blogspot.com/2010/06/making-sense-of-multitouch.html">http://android-developers.blogspot.com/2010/06/making-sense-of-multitouch.html

you can use the concept of scalegesturedetector to implement Pinch zoom , refer http://android-developers.blogspot.com/2010/06/making-sense-of-multitouch.html

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