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• 如何在2D露天地实现绝对翻译
原标题:how to get the absolute translation in a 2D opengl es scene

I have a pannable/zoomable image rendered in a 2d opengl es 1.1. After zooming, how can i get the absolute position from the left side of the image to the left side of my viewable area? Heres an image to clarify what i mean:

“entergraph

问题回答

我很不了解海洋观测系统,但从逻辑上讲,视来源地和如何把你的形象推到屏幕上,你只能计算出与图像X级位置的距离。 例如,如果您的原籍位于屏幕顶端(0,0),你的形象是从顶部(例如,(10,0)抽取的,那么你的距离只是你形象的X位(例如10个单位)的绝对值。 然而,如果说你来自该中心,那么你就必须考虑到屏幕大小,并减去距离。 这可能会造成混乱,但这只是基本数学。





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