【摘要】 针对三维天空场景仿真中出现的场景实时性和真实性不能满足用户的需求等问题,提出了基于GPU(graphic pro-cessing unit)的动态天空场景仿真方法。在开源场景图形系统(OpenSceneGraph)开发平台上,使用基于物理的方法计算出一天中不同时刻天空的背景色;采用shader技术,用OpenGL着色语言(GLSL)在GPU上对云、太阳进行模拟;针对太阳的位置,绘制出具有真实感效果的光晕。实验结果表明,该仿真方法可以绘制出具有动态效果的、天空颜色能平滑过渡的天空场景,并且真实感强。更多还原

【Abstract】 To solve the problems that the effects of real-time and realistic can’t be accepted by users when rendering three-dimensional sky scenes,a method based on GPU that can simulate the dynamic sky scenes is proposed.Firstly,all the time,the sky background color is calculated with physical methods using the OpenSceneGraph development kit.Then,the scenes’ clouds and sun are simulated by the OpenGL Shading Language.Finally,the lens flare is rendered according to the position of the sun.Experimental results show that this method can simulate dynamic and real sky scenes,and the sky color is changed smoothly.更多还原