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279
src/com/gnarly/engine/display/Window.java
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279
src/com/gnarly/engine/display/Window.java
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package com.gnarly.engine.display;
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import static org.lwjgl.glfw.GLFW.*;
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import static org.lwjgl.glfw.GLFW.GLFW_CONTEXT_VERSION_MINOR;
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import static org.lwjgl.glfw.GLFW.GLFW_FALSE;
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import static org.lwjgl.glfw.GLFW.GLFW_OPENGL_CORE_PROFILE;
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import static org.lwjgl.glfw.GLFW.GLFW_OPENGL_PROFILE;
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import static org.lwjgl.glfw.GLFW.GLFW_PRESS;
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import static org.lwjgl.glfw.GLFW.GLFW_RESIZABLE;
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import static org.lwjgl.glfw.GLFW.GLFW_TRUE;
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import static org.lwjgl.glfw.GLFW.glfwCreateWindow;
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import static org.lwjgl.glfw.GLFW.glfwGetCursorPos;
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import static org.lwjgl.glfw.GLFW.glfwGetKey;
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import static org.lwjgl.glfw.GLFW.glfwGetMouseButton;
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import static org.lwjgl.glfw.GLFW.glfwGetPrimaryMonitor;
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import static org.lwjgl.glfw.GLFW.glfwGetVideoMode;
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import static org.lwjgl.glfw.GLFW.glfwInit;
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import static org.lwjgl.glfw.GLFW.glfwMakeContextCurrent;
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import static org.lwjgl.glfw.GLFW.glfwPollEvents;
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import static org.lwjgl.glfw.GLFW.glfwSetErrorCallback;
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import static org.lwjgl.glfw.GLFW.glfwSetScrollCallback;
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import static org.lwjgl.glfw.GLFW.glfwSetWindowPos;
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import static org.lwjgl.glfw.GLFW.glfwSetWindowShouldClose;
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import static org.lwjgl.glfw.GLFW.glfwSetWindowSizeCallback;
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import static org.lwjgl.glfw.GLFW.glfwSwapBuffers;
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import static org.lwjgl.glfw.GLFW.glfwSwapInterval;
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import static org.lwjgl.glfw.GLFW.glfwWindowHint;
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import static org.lwjgl.glfw.GLFW.glfwWindowShouldClose;
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import static org.lwjgl.opengl.GL.createCapabilities;
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import static org.lwjgl.opengl.GL11.GL_BLEND;
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import static org.lwjgl.opengl.GL11.GL_COLOR_BUFFER_BIT;
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import static org.lwjgl.opengl.GL11.GL_DEPTH_BUFFER_BIT;
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import static org.lwjgl.opengl.GL11.GL_DEPTH_TEST;
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import static org.lwjgl.opengl.GL11.GL_ONE_MINUS_SRC_ALPHA;
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import static org.lwjgl.opengl.GL11.GL_SRC_ALPHA;
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import static org.lwjgl.opengl.GL11.GL_TEXTURE_2D;
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import static org.lwjgl.opengl.GL11.glBlendFunc;
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import static org.lwjgl.opengl.GL11.glClear;
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import static org.lwjgl.opengl.GL11.glClearColor;
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import static org.lwjgl.opengl.GL11.glEnable;
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import static org.lwjgl.opengl.GL11.glViewport;
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import static org.lwjgl.opengl.GL30.*;
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import static org.lwjgl.system.MemoryUtil.NULL;
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import org.joml.Vector3f;
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import org.lwjgl.glfw.GLFWCharCallback;
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import org.lwjgl.glfw.GLFWCharModsCallback;
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import org.lwjgl.glfw.GLFWErrorCallback;
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import org.lwjgl.glfw.GLFWKeyCallback;
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import org.lwjgl.glfw.GLFWScrollCallback;
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import org.lwjgl.glfw.GLFWVidMode;
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import org.lwjgl.glfw.GLFWWindowSizeCallback;
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public class Window {
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public static final byte
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UNPRESSED = 0,
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RELEASED = 1,
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PRESSED = 2,
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HELD = 3;
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private long window;
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private GLFWVidMode vidMode;
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private int xOff, yOff, vWidth, vHeight;
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private double scrollX, scrollY;
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private StringBuilder input;
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private boolean resized;
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byte[] keys = new byte[GLFW_KEY_LAST];
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public Window(int width, int height, boolean vSync, boolean resizable, String title) {
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init(width, height, vSync, resizable, title);
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}
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public Window(boolean vSync) {
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init(0, 0, vSync, false, null);
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}
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private void init(int width, int height, boolean vSync, boolean resizable, String title) {
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glfwSetErrorCallback(GLFWErrorCallback.createPrint(System.err));
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if(!glfwInit()) {
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System.err.println("GLFW failed to initialize!");
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System.exit(-1);
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}
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glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
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glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 3);
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glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
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glfwWindowHint(GLFW_RESIZABLE, resizable ? GLFW_TRUE : GLFW_FALSE);
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vidMode = glfwGetVideoMode(glfwGetPrimaryMonitor());
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if(width == 0 || height == 0 || width >= vidMode.width() || height >= vidMode.height()) {
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width = vidMode.width();
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height = vidMode.height();
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window = glfwCreateWindow(width, height, "", glfwGetPrimaryMonitor(), NULL);
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}
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else {
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window = glfwCreateWindow(width, height, title, NULL, NULL);
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glfwSetWindowPos(window, (vidMode.width() - width) / 2, (vidMode.height() - height) / 2);
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}
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glfwMakeContextCurrent(window);
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createCapabilities();
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glfwSwapInterval(vSync ? 1 : 0);
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glfwSetWindowSizeCallback(window, new GLFWWindowSizeCallback() {
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public void invoke(long window, int width, int height) {
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resized = true;
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glViewport(0, 0, width, height);
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}
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});
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glfwSetScrollCallback(window, new GLFWScrollCallback() {
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public void invoke(long window, double x, double y) {
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scrollX = x;
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scrollY = y;
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}
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});
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input = new StringBuilder();
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glfwSetCharModsCallback(window, new GLFWCharModsCallback() {
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public void invoke(long window, int key, int mods) {
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input.append((char) key);
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}
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});
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glfwSetKeyCallback(window, new GLFWKeyCallback() {
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public void invoke(long window, int key, int scancode, int action, int mods) {
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if(action != GLFW_RELEASE) {
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if(glfwGetKey(window, GLFW_KEY_LEFT_CONTROL) != GLFW_PRESS && glfwGetKey(window, GLFW_KEY_RIGHT_CONTROL) != GLFW_PRESS && glfwGetKey(window, GLFW_KEY_LEFT_ALT) != GLFW_PRESS && glfwGetKey(window, GLFW_KEY_RIGHT_ALT) != GLFW_PRESS) {
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switch (key) {
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case GLFW_KEY_ENTER:
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input.append((char) 10);
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break;
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case GLFW_KEY_BACKSPACE:
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input.append((char) 8);
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break;
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case GLFW_KEY_DELETE:
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input.append((char) 127);
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break;
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case GLFW_KEY_LEFT:
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input.append((char) 1);
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break;
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case GLFW_KEY_RIGHT:
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input.append((char) 2);
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break;
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case GLFW_KEY_UP:
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input.append((char) 3);
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break;
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case GLFW_KEY_DOWN:
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input.append((char) 4);
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break;
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case GLFW_KEY_TAB:
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input.append((char) 9);
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break;
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}
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}
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if(keys[key] < PRESSED)
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keys[key] = PRESSED;
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else
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keys[key] = HELD;
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}
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else {
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if(keys[key] > RELEASED)
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keys[key] = RELEASED;
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else
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keys[key] = UNPRESSED;
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}
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}
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});
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float vWidth = 0, vHeight = 0;
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while(vWidth < vidMode.width() && vHeight < vidMode.height()) {
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vWidth += 1;
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vHeight += 9 /16f;
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}
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xOff = (int) ((vidMode.width() - vWidth) / 2);
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yOff = (int) ((vidMode.height() - vHeight) / 2);
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this.vWidth = (int) vWidth;
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this.vHeight = (int) vHeight;
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bind();
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glClearColor(0, 0, 0, 1);
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glEnable(GL_TEXTURE_2D);
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glEnable(GL_DEPTH_TEST);
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glEnable(GL_BLEND);
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glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
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}
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public void update() {
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for (int i = 0; i < keys.length; i++) {
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if(keys[i] == PRESSED)
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++keys[i];
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else if(keys[i] == RELEASED)
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--keys[i];
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}
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scrollX = 0;
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scrollY = 0;
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resized = false;
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input.delete(0, input.length());
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glfwPollEvents();
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}
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public void clear() {
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glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
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}
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public void swap() {
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glfwSwapBuffers(window);
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}
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public void setVSync(boolean vSync) {
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glfwSwapInterval(vSync ? 1 : 0);
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}
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public void close() {
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glfwSetWindowShouldClose(window, true);
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}
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public boolean shouldClose() {
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return glfwWindowShouldClose(window);
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}
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public String getInput() {
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return input.toString();
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}
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public byte getKey(int keyCode) {
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return keys[keyCode];
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}
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public Vector3f getMouseCoords(Camera camera) {
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double[] x = new double[1], y = new double[1];
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glfwGetCursorPos(window, x, y);
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Vector3f ret = new Vector3f((float) x[0] - xOff, (float) y[0] - yOff, 0);
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ret.mul(camera.getWidth() / vWidth, camera.getHeight() / vHeight, 1);
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return ret;
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}
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public boolean mousePressed(int button) {
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return glfwGetMouseButton(window, button) == GLFW_PRESS;
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}
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public int getWidth() {
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return vWidth;
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}
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public int getHeight() {
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return vHeight;
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}
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public boolean wasResized() {
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return resized;
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}
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public float getScrollX() {
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return (float) scrollX;
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}
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public float getScrollY() {
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return (float) scrollY;
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}
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public void bind() {
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glBindFramebuffer(GL_FRAMEBUFFER, 0);
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glViewport(xOff, yOff, vWidth, vHeight);
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}
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}
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