OpenGL glsl 实现hdr效果，写出顶点着色器和片元着色器，分别说明着色器中参数的取值范围

顶点着色器:

#version 330 core
layout (location = 0) in vec3 aPos;
layout (location = 1) in vec2 aTexCoords;

out vec2 TexCoords;

uniform mat4 model;
uniform mat4 view;
uniform mat4 projection;

void main()
{
    gl_Position = projection * view * model * vec4(aPos, 1.0);
    TexCoords = aTexCoords;
}

片元着色器:

#version 330 core
out vec4 FragColor;

in vec2 TexCoords;

uniform sampler2D hdrBuffer;
uniform float exposure;

void main()
{
    vec3 hdrColor = texture(hdrBuffer, TexCoords).rgb;
    vec3 hdrColorAdapted = vec3(1.0) - exp(-hdrColor * exposure);
    FragColor = vec4(hdrColorAdapted, 1.0);
}

- 顶点着色器中，uniform mat4 model, view, projection 是视图矩阵、模型矩阵和投影矩阵，它们都是4x4的矩阵。
- 片元着色器中，uniform sampler2D hdrBuffer 是存储高动态范围纹理的纹理单元，uniform float exposure 是曝光值，它取值范围为大于0的实数。