GLSL ES 2.0(用于iPhone/iPod touch/iPad)中的高浮子的精度是多少? [英] What is the precision of highp floats in GLSL ES 2.0 (for iPhone/iPod touch/iPad)?

问题描述

我有一个着色器，理想情况下它需要28位的尾数，尽管我可以减少使用并降低性能.如何确定OpenGL ES中"highp"的精度?它可能是FP24，尾数为16位，但是我无法确定或如何询问OpenGL.有什么想法吗?

I have a shader that ideally needs 28 bits of mantissa, though I can use less and degrade performance. How can I determine what the precision of 'highp' is in OpenGL ES? It's probably an FP24, with 16bits mantissa, but I cannot figure out for sure or how to ask OpenGL. Any ideas?

推荐答案

您希望GetShaderPrecisionFormat查询着色器类型的范围和精度

You want GetShaderPrecisionFormat to query the range and precision of of shader types

int range[2], precision;
glGetShaderPrecisionFormat(GL_FRAGMENT_SHADER, GL_HIGH_FLOAT, range, &precision);

将为您提供上浮的范围和精度.

will give you the range and precision of highp float.

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