如何用glMultiDrawArraysIndirect渲染一个简单的三角形？

Question

我决定选择OpenGL，现在我已经渲染了一个简单的三角形，我想学习如何使用其他方式来渲染glMultiDrawArraysIndirect

似乎没有任何包含此功能的简单在线示例。我试着在GitHub上搜索开源代码，但它主要是文档和复杂的框架。

有人可以解释使用glMultiDrawArraysIndirect呈现Hello World三角形的步骤吗？

以下是我用于渲染简单三角形的以下工作代码。我有一张4.5 OpenGL卡。

static const char * vs_source[] =
{
    "#version 450 core                                                 \n"
    "                                                                  \n"
    "void main(void)                                                   \n"
    "{                                                                 \n"
    "    const vec4 vertices[] = vec4[](vec4( 0.25, -0.25, 0.5, 1.0),  \n"
    "                                   vec4(-0.25, -0.25, 0.5, 1.0),  \n"
    "                                   vec4( 0.25,  0.25, 0.5, 1.0)); \n"
    "                                                                  \n"
    "    gl_Position = vertices[gl_VertexID];                          \n"
    "}                                                                 \n"
};

static const char * fs_source[] =
{
    "#version 450 core                                                 \n"
    "                                                                  \n"
    "out vec4 color;                                                   \n"
    "                                                                  \n"
    "void main(void)                                                   \n"
    "{                                                                 \n"
    "    color = vec4(0.0, 0.8, 1.0, 1.0);                             \n"
    "}                                                                 \n"
};

program = glCreateProgram();
GLuint fs = glCreateShader(GL_FRAGMENT_SHADER);
glShaderSource(fs, 1, fs_source, NULL);
glCompileShader(fs);

GLuint vs = glCreateShader(GL_VERTEX_SHADER);
glShaderSource(vs, 1, vs_source, NULL);
glCompileShader(vs);

glAttachShader(program, vs);
glAttachShader(program, fs);
glLinkProgram(program);

glCreateVertexArrays(1, &vao);


while (!glfwWindowShouldClose(window))
{
    const GLfloat green[] = { 0.0f, 0.25f, 0.0f, 1.0f };
    glClearBufferfv(GL_COLOR, 0, green);

    glUseProgram(program);
    glDrawArrays(GL_TRIANGLES, 0, 3);

    glfwSwapBuffers(window);
    glfwPollEvents();
}