Opengl交换着色器

Question

我正在尝试使用两个单独的着色器程序来绘制两个对象。运行程序时，仅渲染使用第一个着色器程序的对象。此外，在运行后删除第一个着色器时，仅渲染第二个对象。

代码如下。任何帮助表示赞赏。

void display()
{   
    mat4 mod, p, v;
    glBindBuffer (GL_ARRAY_BUFFER, buffer);

    //First Shader
    glUseProgram(lightProgram);
    p = perspective(zoom*45.0, aspect, zNear, zFar);
    v = getViewMatrix();
    mod = translate(0.0, 0.0, -5.0);
    GLint objectColorLoc = glGetUniformLocation(lightProgram, "objectColor");
    GLint lightColorLoc = glGetUniformLocation(lightProgram, "lightColor");
    glUniform3f(objectColorLoc, 1.0f, 0.5f, 0.31f);
    glUniform3f(lightColorLoc,  1.0f, 0.5f, 1.0f);

    model = glGetUniformLocation( lightProgram, "model" );
    view = glGetUniformLocation( lightProgram, "view" );
    projection = glGetUniformLocation( lightProgram, "projection" );  
    glUniformMatrix4fv(projection, 1, GL_TRUE, &p.m[0][0]);
    glUniformMatrix4fv( view, 1, GL_TRUE, &v.m[0][0] );

    glBindVertexArray(containerVAO);
    glUniformMatrix4fv( model, 1, GL_TRUE, &mod.m[0][0] );
    glDrawArrays( GL_TRIANGLES, 0, 36 );
    glBindVertexArray(0);
    //glDeleteProgram(lightProgram);

    //Model 2
    //Second Shader
    glUseProgram(lampProgram);
    model = glGetUniformLocation( lampProgram, "model" );
    view = glGetUniformLocation( lampProgram, "view" );
    projection = glGetUniformLocation( lampProgram, "projection" );
    glUniformMatrix4fv(projection, 1, GL_TRUE, &p.m[0][0]);
    glUniformMatrix4fv( view, 1, GL_TRUE, &v.m[0][0] );

    mod = translatevec3(lightPos);
    glBindVertexArray (lightVAO);
    glUniformMatrix4fv( model, 1, GL_TRUE, &mod.m[0][0] );
    glDrawArrays( GL_TRIANGLES, 0, 36 );
    glBindVertexArray(0);
}

此外，我正在使用

创建我的程序

lightProgram = glCreateProgram();
glAttachShader(lightProgram, lightVertShader);
glAttachShader(lightProgram, lightFragShader);
glLinkProgram(lightProgram);

lampProgram = glCreateProgram();
glAttachShader(lampProgram, lampVertShader);
glAttachShader(lampProgram, lampFragShader);
glLinkProgram(lampProgram);

感谢。