尝试用 LWJGL3 绘制基本形状

Question

所以我想使用 VAO 和 VBO 绘制一个形状，我认为我做的一切都是正确的，但是每当我运行我的代码时，我都会得到带有清晰颜色的窗口。在调用创建功能之前尝试初始化三角形时，我遇到了一个问题，我是否缺少一些开始绘图的函数？

这是我的代码：

int vaoId, vboId, vertexCount;

float[] vertices = {

    // Left bottom triangle

    -0.5f, 0.5f,

    -0.5f, -0.5f,

    0.5f, -0.5f,};

private void init() {

    if (!glfwInit()) {

        throw new IllegalStateException("Failed to Initialize GLFW!");

    }

    int width = 1000;

    int height = 1000;

    glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);

    window = glfwCreateWindow(width, height, "App", NULL, NULL);

    if (window == 0) {

        throw new IllegalStateException("Failed to create Window!");

    }

    GLFWVidMode videoMode = glfwGetVideoMode(glfwGetPrimaryMonitor());

    glfwSetWindowPos(window, (videoMode.width() - width) / 2, (videoMode.height() - height) / 2);

    // Make the OpenGL context current

    glfwMakeContextCurrent(window);

    // Enable v-sync

    glfwSwapInterval(1);

    glfwShowWindow(window);

}

private void loop() {

    // This line is critical for LWJGL's interoperation with GLFW's

    // OpenGL context, or any context that is managed externally.

    // LWJGL detects the context that is current in the current thread,

    // creates the GLCapabilities instance and makes the OpenGL

    // bindings available for use.

    GL.createCapabilities();

    initTriangle();

    // Run the rendering loop until the user has attempted to close

    // the window or has pressed the ESCAPE key.

    while (!glfwWindowShouldClose(window)) {

        glClear(GL_COLOR_BUFFER_BIT); // clear the framebuffer

        glBindVertexArray(vaoId);

        glEnableVertexAttribArray(0);

        glDrawArrays(GL_TRIANGLES, 0, vertexCount);

        glDisableVertexAttribArray(0);

        glBindVertexArray(0);

        glfwSwapBuffers(window); // swap the color buffers

        // Poll for window events. The key callback above will only be

        // invoked during this call.

        glfwPollEvents();

    }

}

希望大家帮帮忙，万分感谢。