[Java-game-lib-cvs] CVS: LWJGL/examples/nehe/lesson09 Lesson9.java,NONE,1.1 Texture.java,NONE,1.1

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Update of /cvsroot/java-game-lib/LWJGL/examples/nehe/lesson09
In directory sc8-pr-cvs1:/tmp/cvs-serv18314/lesson09

Added Files:
	Lesson9.java Texture.java 
Log Message:


up we go =)


--- NEW FILE: Lesson9.java ---
CVS Browser:
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/java-game-lib/LWJGL/examples/nehe/lesson09/Lesson9.java
/* 
 * Copyright (c) 2002 Light Weight Java Game Library Project
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are 
 * met:
 * 
 * * Redistributions of source code must retain the above copyright 
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'Light Weight Java Game Library' nor the names of 
 *   its contributors may be used to endorse or promote products derived 
 *   from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
import java.nio.*;
import java.io.*;
import java.awt.image.BufferedImage;
import java.util.Random;
import javax.swing.JOptionPane;
import javax.imageio.*;

import org.lwjgl.*;
import org.lwjgl.opengl.*;
import org.lwjgl.input.*;

/**
 * $Id: Lesson9.java,v 1.1 2002/11/25 06:53:08 lholden Exp $
 *
 * Moving Bitmaps in 3D Space
 *
 * Credit goes to Jeff Molofee (NeHe) whos tutorial this is based on
 *
 * @author Luke Holden
 * @version $Revision: 1.1 $
 */
public class Lesson9 {
   /* Number Of Stars To Draw */
    public static int NUM = 50;

    private GL gl;
    private GLU glu;
    private Random rand = new Random();
    
    private boolean done = false;
    private boolean fullscreen = true;
    
    /* Twinkling Stars */
    private boolean twinkle = false;
      
    /* Create A Class For Star */
    private class Stars {
        /* Stars Color */
        public int r, g, b;
        /* Stars Distance From Center */
        public float dist;
        /* Stars Current Angle */
        public float angle;
    }
    /* Make 'star' Array Of 'NUM' Using Info From The Class 'Stars' */
    private Stars[] star = new Stars[NUM];
    /* Viewing Distance Away From Stars */
    private float zoom=-15.0f;
    /* Tilt The View */
    private float tilt=90.0f;
    /* Spin Twinkling Stars */
    private float spin;
    /* General Loop Variable */
    private int curStar;
    
    /* Storage For One Texture */
    private IntBuffer textureBuf = createIntBuffer(1);
    
    /** Creates a new instance of Lesson */
    public Lesson9() {

    }
    
    /* A javafied version of AUX_RGBImageRec *LoadBMP(char*); */
    private Texture loadImage(String filename) throws Exception {
        Texture texture = null;
        BufferedImage tmpImg = null;
        
        /* normally I would use StringUtils.isValid(String) from the 
           jakarta commons lib, but thats beyond the scope of this lesson */
        if ((filename != null) && (filename.trim() != "")) {
            try {
                InputStream is = getClass().getResourceAsStream(filename);
                tmpImg = (BufferedImage) ImageIO.read(is);
                if (tmpImg == null) {
                    throw new Exception("Error: Got null from ImageIO.read()");
                }
                texture = new Texture(tmpImg);
            }
            catch ( Exception e ) {
                throw new Exception("Problem loading bitmap", e);
            }
        } else {
            throw new Exception("Error: file name is not valid!");
        }
        return texture;
    }
    
    /* Load Bitmaps And Convert To Textures */
    private void loadGLTextures() throws Exception {
        /* Create Storage Space For The Texture */
        Texture[] textureImage = new Texture[1];
        
        /* Load The Bitmap, Check For Errors, If Bitmap's Not Found Quit */
        try {
            textureImage[0] = loadImage("data/star.png");
            if (textureImage[0] == null) {
                throw new Exception("Error: got null from loadBmp()!");
            }
            
            /* Create Three Textures */
            gl.genTextures(1, Sys.getDirectBufferAddress(textureBuf));
            
            /* Create Nearest Filtered Texture */
            gl.bindTexture(GL.TEXTURE_2D, textureBuf.get(0));
            gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_MAG_FILTER, GL.LINEAR);
            gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_MIN_FILTER, GL.LINEAR);
            gl.texImage2D(GL.TEXTURE_2D, 
                          0, 
                          3, 
                          textureImage[0].getWidth(), 
                          textureImage[0].getHeight(), 
                          0, 
                          GL.RGB, 
                          GL.UNSIGNED_BYTE, 
                          textureImage[0].getPtr());

        }
        catch (Exception e) {
            throw new Exception("Problem loading textures", e);
        }
    }
    
    private void resizeGLScene(int width, int height) {
        /* Reset The Current Viewport */
        gl.viewport(0, 0, width, height);
        /* Select The Projection Matrix */
        
        gl.matrixMode(GL.PROJECTION);
        /* Reset The Projection Matrix */
        gl.loadIdentity();
        
        /* Calculate The Aspect Ratio Of The Window */
        glu.perspective(45.0f, ((float) Display.getWidth()) / ((float) Display.getHeight()), 0.1f, 100.0f);
        
        /* Select The Modelview Matrix */
        gl.matrixMode(GL.MODELVIEW);
        /* Reset The Modelview Matrix */
        gl.loadIdentity();
    }
    
    private void initGL() throws Exception {
        try {
            loadGLTextures();
            /* Enable Texture Mapping */
            gl.enable(GL.TEXTURE_2D);
            /* Enables Smooth Shading */
            gl.shadeModel(GL.SMOOTH);
            /* Black Background */
            gl.clearColor(0.0f, 0.0f, 0.0f, 0.5f);
            /* Depth Buffer Setup */
            gl.clearDepth(1.0f);
            /* Really Nice Perspective Calculations */
            gl.hint(GL.PERSPECTIVE_CORRECTION_HINT, GL.NICEST);
            /* Blending Function For Translucency Based On Source Alpha Value */
            gl.blendFunc(GL.SRC_ALPHA, GL.ONE);
            /* Enable Blending */
            gl.enable(GL.BLEND);
            
            /* Create A Loop That Goes Through All The Stars */
            for (curStar = 0; curStar < NUM; curStar++) {
                star[curStar] = new Stars();
                /* Start All The Stars At Angle Zero */
                star[curStar].angle=0.0f;
                /* Calculate Distance From The Center */
                star[curStar].dist=(((float)curStar)/NUM)*5.0f;
                star[curStar].r=rand.nextInt()%256;
                star[curStar].g=rand.nextInt()%256;
                star[curStar].b=rand.nextInt()%256;
            }
        }
        catch (Exception e) {
            throw new Exception("Problem initialising GL", e);
        }
    }
    
    private boolean drawGLScene() {
        /* Clear The Screen And The Depth Buffer */
        gl.clear(GL.COLOR_BUFFER_BIT | GL.DEPTH_BUFFER_BIT);
        /* Select our Texture */
        gl.bindTexture(GL.TEXTURE_2D, textureBuf.get(0));
        
        /* Loop Through All The Stars */
        for (curStar=0; curStar < NUM; curStar++) {
            /* Reset The Current Modelview Matrix */
            gl.loadIdentity();
            /* Zoom Into The Screen */
            gl.translatef(0.0f, 0.0f, zoom);
            /* Tilt The View */
            gl.rotatef(tilt, 1.0f, 0.0f, 0.0f);
            
            /* Rotate To The Current Stars Angle */
            gl.rotatef(star[curStar].angle, 0.0f, 1.0f, 0.0f);
            /* Move Forward On The X Plane */
            gl.translatef(star[curStar].dist, 0.0f, 0.0f);
            
            /* Cancel The Current Stars Angle */
            gl.rotatef(-star[curStar].angle, 0.0f, 1.0f, 0.0f);
            /* Cancel The Screen Tilt */
            gl.rotatef(-tilt, 1.0f, 0.0f, 0.0f);
            
            /* Twinkling Stars Enabled */
            if (twinkle) {
                /* Assign A Color Using Bytes */
                gl.color4ub((byte) star[(NUM-curStar)-1].r, 
                            (byte) star[(NUM-curStar)-1].g, 
                            (byte) star[(NUM-curStar)-1].b, 
                            (byte) 255);
                /* Begin Drawing The Textured Quad */
                gl.begin(GL.QUADS);
                    gl.texCoord2f(0.0f, 0.0f); gl.vertex3f(-1.0f,-1.0f, 0.0f);
                    gl.texCoord2f(1.0f, 0.0f); gl.vertex3f( 1.0f,-1.0f, 0.0f);
                    gl.texCoord2f(1.0f, 1.0f); gl.vertex3f( 1.0f, 1.0f, 0.0f);
                    gl.texCoord2f(0.0f, 1.0f); gl.vertex3f(-1.0f, 1.0f, 0.0f);
                gl.end();

            }
            /* Rotate The Star On The Z Axis */
            gl.rotatef(spin, 0.0f, 0.0f, 1.0f);
            /* Assign A Color Using Bytes */
            gl.color4ub((byte) star[curStar].r,
                        (byte) star[curStar].g,
                        (byte) star[curStar].b,
                        (byte) 255);
            /* Begin Drawing The Textured Quad */
            gl.begin(GL.QUADS);
                gl.texCoord2f(0.0f, 0.0f); gl.vertex3f(-1.0f, -1.0f, 0.0f);
                gl.texCoord2f(1.0f, 0.0f); gl.vertex3f( 1.0f, -1.0f, 0.0f);
                gl.texCoord2f(1.0f, 1.0f); gl.vertex3f( 1.0f,  1.0f, 0.0f);
		gl.texCoord2f(0.0f, 1.0f); gl.vertex3f(-1.0f,  1.0f, 0.0f);
            gl.end();

            /* Used To Spin The Stars */
            spin+=0.01f;
            /* Changes The Angle Of A Star */
            star[curStar].angle += ((float)curStar)/NUM;
            /* Changes The Distance Of A Star */
            star[curStar].dist -= 0.01f;
            
            /* Is The Star In The Middle Yet */
            if (star[curStar].dist < 0.0f) {
                /* Move The Star 5 Units From The Center */
                star[curStar].dist += 5.0f;
                /* Change Its Color */
                star[curStar].r=rand.nextInt()%256;
                star[curStar].g=rand.nextInt()%256;
                star[curStar].b=rand.nextInt()%256;
            }
        }
	return true;
    }
    
    public void killGLWindow() {
        Keyboard.destroy();
        gl.destroy();
        Display.destroy();
    }
    
    public void createGLWindow(int width, int height, int bits, boolean fullscreenflag) throws Exception {
        fullscreen = fullscreenflag;
        try {
            Display.create(new DisplayMode(width, height, bits, 60), fullscreenflag);
            gl = new GL(bits, 0, bits, 8);
            gl.create();
            glu = new GLU(gl);
            Keyboard.create();
            Keyboard.enableBuffer();
            
            resizeGLScene(Display.getWidth(), Display.getHeight());
            
            initGL();
        }
        catch (Exception e) {
            throw new Exception("Problem initialising Lesson", e);
        }  
    }
    
    public void start() throws Exception {
        try {           
            createGLWindow(640, 480, 16, fullscreen);

            while (!done) {
                loop();
            }
            killGLWindow();
        }
        catch (Exception e) {
            throw new Exception("Problem starting loop", e);
        }
    }

    private void loop() {       
        drawGLScene();
        gl.swapBuffers();

        /* Keys that have a constant effect */
        Keyboard.poll();
        if (Keyboard.isKeyDown(Keyboard.KEY_UP)) {
            tilt -= 0.5f;
        }
        if (Keyboard.isKeyDown(Keyboard.KEY_DOWN)) {
            tilt += 0.5f;
        }
        if (Keyboard.isKeyDown(Keyboard.KEY_PRIOR)) {
            zoom -= 0.2f;
        }
        if (Keyboard.isKeyDown(Keyboard.KEY_NEXT)) {
            zoom += 0.2f;
        }

        
        /* Keys that have a toggle effect */
        Keyboard.read();
        for (int i = 0; i < Keyboard.getNumKeyboardEvents(); i++) {
            Keyboard.next();
            if (Keyboard.key == Keyboard.KEY_ESCAPE && Keyboard.state) {
                done = true;
            }
            if (Keyboard.key == Keyboard.KEY_T && Keyboard.state) {
                twinkle=!twinkle;
            }
        }
    }
    
    private IntBuffer createIntBuffer(int size) {
        ByteBuffer temp = ByteBuffer.allocateDirect(4 * size);
        temp.order(ByteOrder.nativeOrder());
        
        return temp.asIntBuffer();
    }
    
    public static void main(String[] arguments) {
        int err = 0;
        Lesson9 lesson = new Lesson9();
        try {
            lesson.start();            
        }
        catch (Exception e) {
            err = 1;
            e.printStackTrace();
        }
        System.exit(err);
    }
}

--- NEW FILE: Texture.java ---
CVS Browser:
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/java-game-lib/LWJGL/examples/nehe/lesson09/Texture.java
/* 
 * Copyright (c) 2002 Light Weight Java Game Library Project
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are 
 * met:
 * 
 * * Redistributions of source code must retain the above copyright 
 *   notice, this list of conditions and the following disclaimer.
 *
 * * Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the distribution.
 *
 * * Neither the name of 'Light Weight Java Game Library' nor the names of 
 *   its contributors may be used to endorse or promote products derived 
 *   from this software without specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
import java.nio.*;
import java.awt.image.*;
import java.awt.geom.*;

import org.lwjgl.*;
import org.lwjgl.opengl.*;
import org.lwjgl.input.*;

/**
 * $Id: Texture.java,v 1.1 2002/11/25 06:53:08 lholden Exp $
 *
 * Just a small container class for holding texture data
 *
 * @author Luke Holden
 * @version $Revision: 1.1 $
 */
public class Texture {
    private ByteBuffer data;
    private int height;
    private int width;
    
    /** Creates a new instance of Texture */
    public Texture(BufferedImage tmpImg) {
        width = tmpImg.getWidth();
        height = tmpImg.getWidth();
        
        /* flip the image, so it displays right
         * There might be a way to do this differently... */
        
        AffineTransform tx = AffineTransform.getScaleInstance(1, -1);
        tx.translate(0, -tmpImg.getHeight(null));
        AffineTransformOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
        tmpImg = op.filter(tmpImg, null);
        
        data = ByteBuffer.allocateDirect(4 * width * height);
        data.order(ByteOrder.nativeOrder());
        data.clear();
        byte[] byteData = (byte[])tmpImg.getRaster().getDataElements(0, 0, width, height, null);
        data.put(byteData);
        data.flip();
    }
    
    public int getData() {
        return data.get(0);
    }
    
    public ByteBuffer getBuffer() {
        return data;
    }
    
    public int getPtr() {
        return Sys.getDirectBufferAddress(data);
    }
    
    public int getHeight() {
        return height;
    }
    
    public int getWidth() {
        return width;
    }
    
}