Color each face of a cube OpenGL

问题

I am writing this code which execute 25 cubes (5 each line). I have managed to put color in all the cubes the problem is that I do not know how to color each face (side) of the cube .

GLuint renderingProgram = ourShader.Program;

while (!glfwWindowShouldClose(mainWindow))
{


    glfwPollEvents();

glClearColor(0.0f, 0.1f, 0.2f, 1.0f);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);


glBindVertexArray(VAO);

std::vector<glm::vec3> cubePositions;

for(unsigned int i = 0; i <= 24; i++)
{
    float dist = 5; // distance between the cubes
    float x = (i % 5) * dist;
    float y = (i / 5) * dist;

    cubePositions.push_back(glm::vec3(x, y, 0.0f));
    glm::mat4 model = glm::mat4(1.0f);

    model = glm::translate(model, cubePositions[i]);

    float angle = 20.0f * i;
    angle = glfwGetTime() * 25.0f;
    model = glm::rotate(model, glm::radians(angle), glm::vec3(1.0f, 0.3f, 0.5f));
    GLint modelLoc = glGetUniformLocation(ourShader.Program, "model");
    glUniformMatrix4fv(modelLoc, 1, GL_FALSE, glm::value_ptr(model));

    glUseProgram(renderingProgram);

    //Color
    int uniformColorLocation =
    glGetUniformLocation(renderingProgram,"ourColor");
    glUniform4f(uniformColorLocation,0.0f,1.0f,0.0f,1.0f);

    glDrawArrays(GL_TRIANGLES, 0, 36);
}

}

来源：https://stackoverflow.com/questions/58700191/color-each-face-of-a-cube-opengl