java类型GLFWKeyCallback的free()方法未定义
我已经安装了稳定的LWJGL 3.0.0b版本,我正在尝试遵循https://www.lwjgl.org/guide中的窗口创建示例。但是,我得到了“类型GLFWKeyCallback的方法free()未定义”和“类型GLFWErrorCallback的方法free()未定义”错误。free()方法应该在GLFWKeyCallback和GLFWErrorCallback类中,但显然不在那里。我如何解决这个问题?谢谢
以下是来自https://www.lwjgl.org/guide的代码:
import org.lwjgl.*;
import org.lwjgl.glfw.*;
import org.lwjgl.opengl.*;
import static org.lwjgl.glfw.GLFW.*;
import static org.lwjgl.opengl.GL11.*;
import static org.lwjgl.system.MemoryUtil.*;
public class HelloWorld {
// We need to strongly reference callback instances.
private GLFWErrorCallback errorCallback;
private GLFWKeyCallback keyCallback;
// The window handle
private long window;
public void run() {
System.out.println("Hello LWJGL " + Version.getVersion() + "!");
try {
init();
loop();
// Destroy window and window callbacks
glfwDestroyWindow(window);
keyCallback.free();
} finally {
// Terminate GLFW and free the GLFWErrorCallback
glfwTerminate();
errorCallback.free();
}
}
private void init() {
// Setup an error callback. The default implementation
// will print the error message in System.err.
glfwSetErrorCallback(errorCallback = GLFWErrorCallback.createPrint(System.err));
// Initialize GLFW. Most GLFW functions will not work before doing this.
if ( glfwInit() != GLFW_TRUE )
throw new IllegalStateException("Unable to initialize GLFW");
// Configure our window
glfwDefaultWindowHints(); // optional, the current window hints are already the default
glfwWindowHint(GLFW_VISIBLE, GLFW_FALSE); // the window will stay hidden after creation
glfwWindowHint(GLFW_RESIZABLE, GLFW_TRUE); // the window will be resizable
int WIDTH = 300;
int HEIGHT = 300;
// Create the window
window = glfwCreateWindow(WIDTH, HEIGHT, "Hello World!", NULL, NULL);
if ( window == NULL )
throw new RuntimeException("Failed to create the GLFW window");
// Setup a key callback. It will be called every time a key is pressed, repeated or released.
glfwSetKeyCallback(window, keyCallback = new GLFWKeyCallback() {
@Override
public void invoke(long window, int key, int scancode, int action, int mods) {
if ( key == GLFW_KEY_ESCAPE && action == GLFW_RELEASE )
glfwSetWindowShouldClose(window, GLFW_TRUE); // We will detect this in our rendering loop
}
});
// Get the resolution of the primary monitor
GLFWVidMode vidmode = glfwGetVideoMode(glfwGetPrimaryMonitor());
// Center our window
glfwSetWindowPos(
window,
(vidmode.width() - WIDTH) / 2,
(vidmode.height() - HEIGHT) / 2
);
// Make the OpenGL context current
glfwMakeContextCurrent(window);
// Enable v-sync
glfwSwapInterval(1);
// Make the window visible
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();
// Set the clear color
glClearColor(1.0f, 0.0f, 0.0f, 0.0f);
// Run the rendering loop until the user has attempted to close
// the window or has pressed the ESCAPE key.
while ( glfwWindowShouldClose(window) == GLFW_FALSE ) {
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); // clear the framebuffer
glfwSwapBuffers(window); // swap the color buffers
// Poll for window events. The key callback above will only be
// invoked during this call.
glfwPollEvents();
}
}
public static void main(String[] args) {
new HelloWorld().run();
}
}
# 1 楼答案
入门部分中的代码仅适用于最新的夜间版本。自3.0.0b以来,API发生了一些变化——在本例中,只需使用
release()
而不是较新的free()
(但请记住在3.0.0发布时将其更改回原来的版本)