使用多个纹理将纹理分配给对象 [英] Assigning texture to an object using multiple textures

问题描述

制作对象加载器，并且所有纹理部分在不同的纹理文件中。什么是将其映射到模型上的最佳解决方案？
我需要将每个具有自己的纹理的部分作为1个模型来处理，以便最终的body有多个独立的绘图调用，每个都有一个纹理。

解决方案

随着可编程渲染管线（即： ）的出现，您现在可以将多个纹理应用并合并到网格，而不需要多次绘制调用。 p>

现代GPU有多个纹理单元（ glActiveTexture ），着色器可以一次读取多个单元。例如，您在图片中显示的右侧模型可能使用了 Phong 具有漫反射纹理的照明模型，法线贴图纹理，可能还包含高光贴图纹理的亮点。所有这些三个纹理肯定应用于一个纹理单元，整个模型在一个绘制调用中渲染。片段着色器然后读取这些纹理，并组合它们以产生最终的图像。

你的问题不是很具体，所以这是我现在可以说的。如果您有更多具体问题，请随意提问。

I'm making a object loader, and all the texture parts are in different texture files. What is the best solution of having it mapped on the model? Do I need to treat every part that has it's own texture as 1 model, so that the final body has many separate drawing calls with one texture each?

解决方案

With the advent of the programmable rendering pipeline (i.e.: shaders) you can now apply and combine multiple textures to meshes without the need for multiple draw calls.

Modern GPUs have several texture units (glActiveTexture) and shaders can read from may units at a time. The model on the right that you showed in the picture, for example, probably uses a variation of the Phong lighting model with a diffuse texture, a normal map texture and probably a specular map texture for the highlights. All these three textures are certainly applied each to a texture unit and the whole model is rendered in one draw call. The fragment shader then reads this textures and combines them to produce the final image.

Your question is not very specific, so this is all I can say for now. If you have more specific questions, please fell free to ask.

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