问为什么我的LWJGL alpha_anti_aliasing不能工作？
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Stack Overflow用户

提问于 2021-05-11 15:59:36

回答 1查看 122关注 0票数 0

我刚刚用LWJGL编写了一些代码，当我现在开始我的程序时，它只是输出一个带有圆角的正方形(圆角边是在阴影中创建的，而不是通过纹理创建的)。这个正方形在边缘周围有很多混叠，我想把它去掉。我相信，在LWJGL中这样做的常见方法是将glfwWindowHint(GLFW_SAMPLES, 8);添加到窗口提示中，然后调用glEnable(GL_MULTISAMPLE);。边是四舍五入的，因为它们的alpha值(不是因为它们有多个顶点)，我还必须调用glEnable(GL_SAMPLE_ALPHA_TO_COVERAGE)来启用OpenGLα反混叠。但由于某些原因，这是行不通的，只有阿尔法混合是好的，但阿尔法AA没有激活。这是创建窗口的代码：

private void init() {
    GLFWErrorCallback.createPrint(System.err).set();
    if (!glfwInit())
        throw new IllegalStateException("Unable to initialize GLFW");

    glfwDefaultWindowHints();
    glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE);
    glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE);
    glfwWindowHint(GLFW_DECORATED, GLFW_FALSE);
    glfwWindowHint(GLFW_SAMPLES, 8);
    
    //glfwWindowHint(GLFW_TRANSPARENT_FRAMEBUFFER, GLFW_TRUE);
    
    window = glfwCreateWindow(width, height,title,NULL,NULL);
    
    if(window == NULL) {
        throw new RuntimeException("Failed to create the GLFW window");
    }
    
    glfwSetKeyCallback(window, (window,key,scancode,action,mods) -> {
        keyPress(window,key,scancode,action,mods);
    });
    glfwSetCursorPosCallback(window, (window,xPos,yPos) -> {
        mousePos(window,xPos,yPos);
    });
    glfwSetMouseButtonCallback(window, (window,button,action,mods) -> {
        mouseClick(window,button,action,mods);
    });
    
    glfwSetWindowSizeCallback(window, (window, width, height) -> {
        glViewport(0, 0,width, height);
    });
    
    try ( MemoryStack stack = stackPush() ) {
        IntBuffer pWidth = stack.mallocInt(1);
        IntBuffer pHeight = stack.mallocInt(1);
        glfwGetWindowSize(window, pWidth, pHeight);
        GLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());
        glfwSetWindowPos(
                window,
                (vidmode.width() - pWidth.get(0)) / 2,
                (vidmode.height() - pHeight.get(0)) / 2
        );
    }
    
    glfwMakeContextCurrent(window);
    glfwSwapInterval(1);
    glfwShowWindow(window);
    GL.createCapabilities();
    
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
    glEnable(GL_BLEND);  
    glEnable(GL_MULTISAMPLE); 

    
    try {
        initCallback.invoke(this);
    } catch (IllegalAccessException | IllegalArgumentException | InvocationTargetException e) {
        System.err.println("Incompatible Method for initCallback");
    }
}

有人知道为什么这不管用吗？

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