有没有办法在着色器中合并 Unity 中的纹理？
[英]Is there a way to merge textures in Unity in a shader?
问题描述
I'm trying to animate a 2D game object using several overlaid layers of images in one mesh renderer.
我正在尝试在一个网格渲染器中使用多个重叠的图像层为 2D 游戏 object 制作动画。 I've got several layers of different textures, each is an image with a transparent background.我有几层不同的纹理，每一层都是具有透明背景的图像。
I've found a way to programmatically create a rectangular mesh and layer the materials within it with UV mapping.我找到了一种以编程方式创建矩形网格并使用 UV 映射将其中的材质分层的方法。 Unfortunately Unity now has to render each of these material layers separately, despite the fact that they are all within one mesh.不幸的是，Unity 现在必须单独渲染这些材质层中的每一个，尽管它们都在一个网格中。 This results in a very inefficient number of draw calls.这导致绘制调用的数量非常低效。 I can see that each material now has it's own shader as well.我可以看到现在每种材质也都有自己的着色器。
Will I need to edit all of my images into one gigantic image outside of Unity and display portions of them using UV mapping in a single material within the mesh?我是否需要在 Unity 之外将所有图像编辑成一张巨大的图像，并在网格内的单一材质中使用 UV 映射显示其中的一部分？
Or is there some way to achieve this with a shader?或者有什么方法可以通过着色器实现这一点？
1 个解决方案
解决方案1
4 已采纳 2021-03-07 19:07:17
Create your own Shader (Code or ShaderGraph).创建您自己的着色器（代码或 ShaderGraph）。 Shaders can render multiple Textures (layers).着色器可以渲染多个纹理（层）。 You can blend by alpha/transprency however you like.您可以根据自己的喜好通过 alpha/transprency 进行混合。
Edit: Example in ShaderGraph:编辑：ShaderGraph 中的示例：
ShaderGraph Code: https://pastebin.com/a8ubgxRP ShaderGraph 代码： https://pastebin.com/a8ubgxRP
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有什么方法/着色器可以在 Unity WebGL 中生成 3d 热图？ - Is there any way/shader for generating 3d heatmap in Unity WebGL?
Unity / Vuforia中对象的纹理 - Textures to Object in Unity / Vuforia
Unity 不显示精灵/纹理 - Unity Not Displaying Sprites / Textures
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