基于投影网格上的Phillips谱真实感海浪仿真模拟

针对如何有效利用现代图形硬件渲染大规模真实感海浪场景的难题,构建了一种基于投影网格上的Phillips谱海浪模型,利用GPU得到的海面浪高渲染为实时高度浮点纹理图,对每个像素进行求梯度得到海水法向纹理图。提出了基于GLSL语言的海水光照算法,实现动态海面光照效果,通过对程序参数的调节,进行不同风向风速下海面浪高的控制以及能见度、太阳高度角等不同气象要素下的真实感海浪绘制。仿真结果表明,该模型及渲染方法能够获得逼真的场景特效。

Realistic ocean wave simulation using Phillips spectrum based on projection grid

The modern graphics hardware to effectively render large scale realistic ocean waves,it is a problem to use. To aim this, an ocean wave model using Phillips spectrum based on projected grid was constructed. A real-time height floating point texture was made from the height date of the waves by graphic processing unit(GPU), and the normal map was got by calculating the grads of each pixel in the height map. Finally, an OpenGL Shading Language(GLSL)light arithmetic was proposed, and the dynamic surface lighting effects were achieved. Meanwhile the rendering of the realistic sea under different meteorological elements like different wind direction and wind speed, visibility, sun angle and so on was approached through the program parameters adjusting. Simulation result shows that the model and rendering method can obtain access to a realistic scenes.