Question

当我尝试将均匀uint从顶点着色器传递给片段着色器时，它会更改该值。我已经确认，如果值不是1，则通过更改位置在顶点着色器中值为1.如果片段着色器中的值为1，则显示漫反射纹理而不是漫反射颜色。代码如下。此外，我尝试将其作为统一vec2中的值传递，但这也不起作用。

顶点着色器：

#version 410
// Layouts
layout(location = 0) in vec3 position;
layout(location = 1) in vec2 texCoord;
// Uniforms (matrices)
uniform mat4 model, view, proj;
// Uniforms (texture)
uniform uint useDiffuseTexture;
// Uniforms (shininess)
uniform float shininess;
uniform float shininessStrength;
// Uniforms (colour)
uniform vec3 diffuseColour;
uniform vec3 specularColour;
// Outputs (texture)
out uint UseDiffuseTexture;
out vec2 TexCoord;
// Outputs (colour)
out vec3 DiffuseColour;
out vec3 SpecularColour;
// Outputs (shininess)
out float Shininess;
out float ShininessStrength;
void main() {
    UseDiffuseTexture = useDiffuseTexture;
    TexCoord = texCoord;
    if(useDiffuseTexture == 1)
        gl_Position = proj * view * model * vec4(position, 1.0);
    else
        gl_Position = vec4(position, 1.0);
}

Fragment Shader：

#version 410
// Inputs (texture)
in vec2 TexCoord;
uniform sampler2D diffuseTexture;
// Uniforms (texture)
uniform uint UseDiffuseTexture;
// Uniforms (colour)
uniform vec3 DiffuseColour;
uniform vec3 SpecularColour;
// Uniforms (shininess)
uniform float Shininess;
uniform float ShininessStrength;
// Output
out vec4 fragColour;
void main() {
    vec4 texColour = vec4(DiffuseColour, 1.0);;
    if(UseDiffuseTexture == 1)
        texColour = texture(diffuseTexture, TexCoord);

    if(texColour.a < 0.2)
        discard;

    fragColour = texColour;
}

Answer 1

在片段着色器中，您声明uniform uint UseDiffuseTexture。如果您希望它是来自顶点着色器的值，则它必须是in uint UseDiffuseTexture

修改
由于输入是unsigned int，因此必须使用“flat”：flat in uint UseDiffuseTexture

进行限定

Answer 2

老兄，错误的定义：D。变化

uniform uint UseDiffuseTexture;
uniform vec3 DiffuseColour;
uniform vec3 SpecularColour;

带有

的片段着色器中的

in uint UseDiffuseTexture;
in vec3 DiffuseColour;
in vec3 SpecularColour;

只是因为你通过顶点着色器传递它而你的片段着色器需要4个IN，因为你的顶点着色器有4个OUT ...

GLSL片段着色器坏值

2 个答案: