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  "contentMarkdown": "# CubeMap & Skybox\n\n> 创建时间：2021/3/8 11:46\n\n## Cubemap\n\nA Cubemap is a collection of **six square textures** that represent the reflections on an environment. The six squares form the faces of an imaginary cube that surrounds an object; each face represents the view along the directions of the world axes (up, down, left, right, forward and back).\n\n可以使用方向向量对它们索引和采样\n\n```csharp\nstring s1 = &quot;Hello &quot;;\nstring s2 = s1;\ns1 += &quot;World&quot;;\n\nSystem.Console.WriteLine(s2);\n//Output: Hello\n\n```\n\n## 制作方法\n\n### Legacy Cubemap Assets\n\n![Alt text](assets/1615185104728.png)\n\n### Cubemap texture\n\n![Alt text](assets/1615185140709.png)\n\n### PanoramaToCubemap\n\n![Alt text](assets/1615185709526.png)\n\n### Shader实现\n\n使用Texture2D格式，在Shader当中组织，而不使用Unity的Cubemap格式。\n\n![Alt text](assets/1615185174675.png)\n\n## Skybox的实现\n\n### 使用Cubemap\n\n制作Cubemap资源 。Buitin Shader当中的Skybox/Cubemap可以对Cubemap采样\n\n![Alt text](assets/1615185387170.png)\n\n### 在Shader中对6张图采样\n\nBuiltin Shader: Mobile-Skybox\n\n![Alt text](assets/1615185458141.png)\n\n### Panorama(全景画)\n\nBuiltin Shader: Skybox/Panoramic\n可以直接Texture2D格式的对全景图进行采样。\n\n## Ref\n\n<https://blog.csdn.net/v_xchen_v/article/details/79474193>\n"
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