1

I am following a youtube tutorial about making an rpg in Java with OpenGL.

Now I am slowly getting ahead, and there is no GUI type tutorial yet so I want to add some text to say my stats and other stuff.

Here is the main class of my code

package com.base.engine;

import static org.lwjgl.opengl.GL11.GL_COLOR_BUFFER_BIT;
import static org.lwjgl.opengl.GL11.GL_DEPTH_TEST;
import static org.lwjgl.opengl.GL11.GL_MODELVIEW;
import static org.lwjgl.opengl.GL11.GL_PROJECTION;
import static org.lwjgl.opengl.GL11.glClear;
import static org.lwjgl.opengl.GL11.glClearColor;
import static org.lwjgl.opengl.GL11.glDisable;
import static org.lwjgl.opengl.GL11.glLoadIdentity;
import static org.lwjgl.opengl.GL11.glMatrixMode;
import static org.lwjgl.opengl.GL11.glOrtho;

import java.util.ArrayList;

import org.lwjgl.LWJGLException;
import org.lwjgl.input.Keyboard;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengl.GL11;

import com.base.game.GUI;
import com.base.game.Game;
import com.base.game.Time;

public class Main {

    public static Game game;
    private static GUI gui;
    public static void main(String[] args){
        initDisplay();
        initGL();

        initGame();
        gui = new GUI("i");
        gameLoop();

        cleanUp();
    }

    public static ArrayList<GameObject> sphereCollide(float x, float y, float radius)
    {
        return game.sphereCollide(x, y, radius);
    }

    public static ArrayList<GameObject> rectangleCollide(float x1, float y1, float x2, float y2)
    {
        return game.rectangleCollide(x1,y1,x2,y2);
    }

    public static void initGame(){
        game = new Game();
    }


    public static void getInput(){
        game.getInput();
    }

    public static void update(){
        game.update();
    }

    public static void render(){

        glClear(GL_COLOR_BUFFER_BIT);
        glLoadIdentity();

        game.render();
        gui.drawText("Welcome to the jungle!");
        Display.update();
        Display.sync(60);

    }

    public static void cleanUp(){
        Display.destroy();
        Keyboard.destroy();
    }

    public static void gameLoop(){
        Time.init();
        while(!Display.isCloseRequested())
        {
            Time.update();
            getInput();
            update();
            render();
        }
    }

    public static void initGL(){
        glMatrixMode(GL_PROJECTION);
        glLoadIdentity();
        glOrtho(0, Display.getWidth(), 0, Display.getHeight(), -1, 1);
        glMatrixMode(GL_MODELVIEW);
        glDisable(GL_DEPTH_TEST);

        glClearColor(0, 0, 0, 0);
        glDisable(GL11.GL_TEXTURE_2D);

    }

    public static void initDisplay(){

        try {
            Display.setDisplayMode(new DisplayMode(800,600));
            Display.create();
            Keyboard.create();
            Display.setVSyncEnabled(true);
        } catch (LWJGLException e) {
            e.printStackTrace();
        }
    }

}

Here is the GUI class I kinda made.

package com.base.game;


import java.awt.Font;

import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.GL11.*;
import org.newdawn.slick.Color;
import org.newdawn.slick.TrueTypeFont;

import com.base.engine.Main;

/**
* @author Owen Butler
*/
public class GUI {

    private TrueTypeFont font;
    private TrueTypeFont font2;

    public GUI(String text) {

        // load a default java font
        Font awtFont = new Font("Times New Roman", Font.BOLD, 24);
        font = new TrueTypeFont(awtFont, false);

    }

    public void drawText(String text)
    {
        font.drawString((int)100, (int)50, "THE LIGHTWEIGHT JAVA GAMES LIBRARY", Color.yellow);
    }

}

Now this works in a since. It adds something to the screen, but not text, instead it adds a yellow box. No text at all.

4

1 回答 1

0 
GL11.glEnable(GL11.GL_BLEND);
GL11.glBlendFunc(GL11.GL_SRC_ALPHA, GL11.GL_ONE_MINUS_SRC_ALPHA);

那应该行得通。

于 2013-03-19T19:22:46.993 回答