Get key input without a delay

Question

I am writing the input for a Java game using LWJGL3 but I have an issue with input, when I press a key it has to be held for a fraction of a second before it is picked up. How do I make it see the input as soon as it is pressed?

public class InputManager extends GLFWKeyCallback {

    private long window;
    public static boolean[] keys = new boolean[65536];

    public InputManager(long window){
        this.window = window;
    }

    public void setWindow(long window){
        window = window;
    }

    @Override
    public void invoke(long window, int key, int scancode, int action, int mods) {
        keys[key] = action != GLFW_RELEASE;
    }
}

public class DisplayManager {
    private static GLFWErrorCallback errorCallback;
    private static GLFWKeyCallback keyCallback;

    public static void createDisplay() {
        inputManager = new InputManager(window);
        GLFW.glfwSetKeyCallback(window, keyCallback = inputManager);
    }

    public static void updateDisplay() {
    GLFW.glfwPollEvents();

    if (inputManager.keys[GLFW_KEY_SPACE]){
        System.out.println("Spacebar pressed.");
    }
    }
}

https://stackoverflow.com/questions/23404863/stop-windows-key-input-delay-in-java — Nosrep, Jan 02 '19 at 02:28

score 0 · Answer 1 · answered Jan 01 '19 at 23:32

0

You are reading the keys ONLY in update display. Update display is being called indeed only few times within a second. You can see in the API how you override the triggered event from another method and store the key to access it later in updatedisplay().

answered Jan 01 '19 at 23:32

Vitali Pomanitski

47
6

Dear @Althaen there are people here who downgraded their teacher's salaries and tried to convince them their teaching is bad. Since the one who answered you is banned as a result of many downvoted answers by such Wonderful and Respectful One kind of a Men (I apologies but the policies of SOF won't allow to tell you what I think about them....). Hence I'll expand on that by myself: Google 'LWJGL3 read key' you will find a requirement to make callback. Callback is called right away, no need to wait for it. Reference: https://github.com/SilverTiger/lwjgl3-tutorial/wiki/Input – Vitali Pom Jan 06 '19 at 19:48

Get key input without a delay

1 Answers1