片段非线性深度值变换为线性

#version 330 core
out vec4 FragColor;

float near = 0.1; 
float far  = 100.0; 

float LinearizeDepth(float depth) 
{
    float z = depth * 2.0 - 1.0; // back to NDC 
    return (2.0 * near * far) / (far + near - z * (far - near));    
}

void main()
{             
    float depth = LinearizeDepth(gl_FragCoord.z) / far; // 为了演示除以 far
    FragColor = vec4(vec3(depth), 1.0);
}
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作者：cqltbe131421 
来源：CSDN 
原文：https://blog.csdn.net/cqltbe131421/article/details/82906652 
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