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【Unity Shader】2D动态云彩
妈妈说女孩子要自立自强 于 2016-01-29 12:58:01 发布 22929 收藏 23
2D动态云彩
src="https://player.vimeo.com/video/153370722?color=c9ff23&title=0&byline=0&portrait=0" width="500" height="281" allowfullscreen="">
创建噪声纹理
添加raymarching
那么现在的问题就是得到这些采样点的云层厚度值fbm。我们可以在片元着色器里沿着光源方向移动几个steps，再投影到天空的圆顶上得到它的采样坐标进行采样，这样一来我们有四张噪声纹理，进行四次raymarching steps就需要16次采样操作。一个更有效的方法是把每张噪声纹理的采样统一到一个采样操作中完成，减少采样次数。那么怎么做呢？我们可以在一开始生成噪声纹理时就把各个raymarching step对应的平移后的噪声纹理存储在不同的RGBA通道上，也就是说，真正的噪声值存储在R通道，按光源方向经过一个raymarching step后的噪声存储在G通道，经过两个raymarching steps后的噪声存储在B通道，经过三个raymarching steps后的噪声存储在A通道。这样一来，我们只需要一个tex2D操作就可以得到四个采样点的值。
- iq的原文：http://www.iquilezles.org/www/articles/dynclouds/dynclouds.htm
- 3D动态体积云渲染：http://advances.realtimerendering.com/s2015/index.html
unity天空天气系统Enviro - Sky and Weather v2.0.3 所支持的Unity版本：5.6.0 及以上版本 Enviro 在IQ Option平台上如何出入金？ - The complete dynamic AAA sky and 在IQ Option平台上如何出入金？ weather solution! Very easy setup: Just drag-and drop into your scene and assign your main camera or use the runtime assignment features. Profile System: Enviro's new profile system makes tweaking your sky as easy as possible. Tweak settings in runtime and save to profile. Load profiles in design and runtime. Create different profiles for different scenes or share your configurations with other user. Day-Night cycle: Enviro supports a realistic day-night cycle. With 在IQ Option平台上如何出入金？ correct sun and moon positions with full location support with latitude and longitude. You have options to use your system time or let enviro update time based on realtime minutes. Skybox: Enviro includes an advanced fast atmospheric skybox shader to get great looking skies! You got a lot of options to tweak the sky and even can setup funky alien skies!
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