GLubyte vs GLshort的指数 [英] GLubyte vs GLshort for Indices

问题描述

在OpenGL中查看顶点数组的文档时，我发现用于索引的两种最常见的内存类型是GLubyte(GL_UNSIGNED_BYTE)和GLshort(GL_SHORT). 我想知道使用两者作为索引之间是否有任何实际差异

Looking through documentation for vertex arrays in OpenGL, two of the most common memory types used for indices I found were GLubyte (GL_UNSIGNED_BYTE) and GLshort (GL_SHORT). I was wondering if there was any actual difference between using the two for indices

谢谢， 龙龙

推荐答案

GL_UNSIGNED_BYTE是可以的-确实不多.

GL_UNSIGNED_BYTE is OK for models which have at most 256 vertices - that's really not many.

GL_UNSIGNED_SHORT占用2个字节，会将您限制为65536个顶点-仍然很少.

GL_UNSIGNED_SHORT, taking 2 bytes, would limit you to 65536 vertices - still that's kind of few.

我想说的是最常见的变体是GL_UNSIGNED_INT，因为对于中多边形和高多边形模型而言，即使2个字节也可能不够.

I'd say the most common variant is GL_UNSIGNED_INT, as even 2 bytes may not be enough for mid-poly and high-poly models.

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