snuvi-engine/src/me/hammerle/snuviengine/api/GamepadHandler.java

package me.hammerle.snuviengine.api;

import java.nio.ByteBuffer;
import java.nio.FloatBuffer;
import java.util.function.Consumer;
import static org.lwjgl.glfw.GLFW.*;

public class GamepadHandler
{
    public final static GamepadBinding A = new GamepadBinding("A", 1);
    public final static GamepadBinding B = new GamepadBinding("B", 2);
    public final static GamepadBinding X = new GamepadBinding("X", 0);
    public final static GamepadBinding Y = new GamepadBinding("Y", 3);
    public final static GamepadBinding L = new GamepadBinding("L", 4);
    public final static GamepadBinding R = new GamepadBinding("R", 5);
    public final static GamepadBinding START = new GamepadBinding("Start", 9);
    public final static GamepadBinding SELECT = new GamepadBinding("Select", 8);

    public final static GamepadBinding LEFT = new GamepadBinding("Left", 0);
    public final static GamepadBinding RIGHT = new GamepadBinding("Right", 0);
    public final static GamepadBinding UP = new GamepadBinding("Up", 1);
    public final static GamepadBinding DOWN = new GamepadBinding("Down", 1);

    private final static GamepadBinding[] BUTTONS = new GamepadBinding[]
    {
        A, B, X, Y, L, R, START, SELECT
    };
    
    public final static GamepadBinding[] BINDINGS = new GamepadBinding[]
    {
        A, B, X, Y, L, R, START, SELECT, LEFT, RIGHT, UP, DOWN
    };

    protected static void tick()
    {
        if(!glfwJoystickPresent(GLFW_JOYSTICK_1))
        {
            return;
        }
        updateButtons();
        updateAxes();
    }

    private static void updateButtons()
    {
        ByteBuffer buttonBuffer = glfwGetJoystickButtons(GLFW_JOYSTICK_1);
        if(buttonBuffer == null)
        {
            return;
        }
        for(GamepadBinding binding : BUTTONS)
        {
            binding.tick(buttonBuffer.get(binding.getMapping()) != 0);
        }
    }

    private static void updateAxes()
    {
        FloatBuffer axesBuffer = glfwGetJoystickAxes(GLFW_JOYSTICK_1);
        if(axesBuffer == null)
        {
            return;
        }
        LEFT.tick(axesBuffer.get(LEFT.getMapping()) < -0.5f);
        RIGHT.tick(axesBuffer.get(RIGHT.getMapping()) > 0.5f);
        UP.tick(axesBuffer.get(UP.getMapping()) < -0.5f);
        DOWN.tick(axesBuffer.get(DOWN.getMapping()) > 0.5f);
    }
}