Opengl 输入属性的顺序如何影响渲染结果？

交换两个输入变量的顺序会损坏渲染结果。为什么呢

关于其用法的小信息：

#version 130

// Input vertex data, different for all executions of this shader.
in vec3 vertexColor;
in vec3 vertexPosition_modelspace;

// Output data ; will be interpolated for each fragment.
out vec3 fragmentColor;
// Values that stay constant for the whole mesh.
uniform mat4 MVP;

void main(){    

    // Output position of the vertex, in clip space : MVP * position
    gl_Position =  MVP * vec4(vertexPosition_modelspace,1);

    // The color of each vertex will be interpolated
    // to produce the color of each fragment
    fragmentColor = vertexColor;
}

#version 130

// Input vertex data, different for all executions of this shader.
in vec3 vertexPosition_modelspace; // <-- These are swapped.
in vec3 vertexColor;               // <--

// Output data ; will be interpolated for each fragment.
out vec3 fragmentColor;
// Values that stay constant for the whole mesh.
uniform mat4 MVP;

void main(){    

    // Output position of the vertex, in clip space : MVP * position
    gl_Position =  MVP * vec4(vertexPosition_modelspace,1);

    // The color of each vertex will be interpolated
    // to produce the color of each fragment
    fragmentColor = vertexColor;
}

• Vertu模型空间的位置为0，vertexColor的位置为1
• 我绑定存储顶点位置的缓冲区并设置顶点属性指针，然后绑定并设置颜色缓冲区

右键：

#version 130

// Input vertex data, different for all executions of this shader.
in vec3 vertexColor;
in vec3 vertexPosition_modelspace;

// Output data ; will be interpolated for each fragment.
out vec3 fragmentColor;
// Values that stay constant for the whole mesh.
uniform mat4 MVP;

void main(){    

    // Output position of the vertex, in clip space : MVP * position
    gl_Position =  MVP * vec4(vertexPosition_modelspace,1);

    // The color of each vertex will be interpolated
    // to produce the color of each fragment
    fragmentColor = vertexColor;
}

#version 130

// Input vertex data, different for all executions of this shader.
in vec3 vertexPosition_modelspace; // <-- These are swapped.
in vec3 vertexColor;               // <--

// Output data ; will be interpolated for each fragment.
out vec3 fragmentColor;
// Values that stay constant for the whole mesh.
uniform mat4 MVP;

void main(){    

    // Output position of the vertex, in clip space : MVP * position
    gl_Position =  MVP * vec4(vertexPosition_modelspace,1);

    // The color of each vertex will be interpolated
    // to produce the color of each fragment
    fragmentColor = vertexColor;
}

错了：

#version 130

// Input vertex data, different for all executions of this shader.
in vec3 vertexColor;
in vec3 vertexPosition_modelspace;

// Output data ; will be interpolated for each fragment.
out vec3 fragmentColor;
// Values that stay constant for the whole mesh.
uniform mat4 MVP;

void main(){    

    // Output position of the vertex, in clip space : MVP * position
    gl_Position =  MVP * vec4(vertexPosition_modelspace,1);

    // The color of each vertex will be interpolated
    // to produce the color of each fragment
    fragmentColor = vertexColor;
}

#version 130

// Input vertex data, different for all executions of this shader.
in vec3 vertexPosition_modelspace; // <-- These are swapped.
in vec3 vertexColor;               // <--

// Output data ; will be interpolated for each fragment.
out vec3 fragmentColor;
// Values that stay constant for the whole mesh.
uniform mat4 MVP;

void main(){    

    // Output position of the vertex, in clip space : MVP * position
    gl_Position =  MVP * vec4(vertexPosition_modelspace,1);

    // The color of each vertex will be interpolated
    // to produce the color of each fragment
    fragmentColor = vertexColor;
}

#版本130
//输入顶点数据，此着色器的所有执行都不同。
在vec3\u模型空间中；// 这是因为将数据传递给着色器时使用的顺序。在你的OpenGL C或C++代码中，你肯定把顶点颜色作为第一顶点ATTILB发送，然后发送位置。如果要交换着色器中参数的顺序，也必须交换其初始化顺序。
是。我绑定缓冲区并首先为位置（位置=0）设置指针，然后为颜色（位置=1）设置指针。为什么着色器中的顺序是相反的？@Miro:因为你没有强制编译器将它们放到特定的位置。使用
layout（location=…）
存储限定符来确定它们。感谢您的回答。它为我指明了正确的方向。但这并不完全正确。问题是我在指定属性位置之前链接了程序。