[Java-game-lib-cvs] CVS: LWJGL/examples/nehe/lesson08 Lesson8.java,NONE,1.1 Texture.java,NONE,1.1

[Luke H. <lh...@us...>]

Update of /cvsroot/java-game-lib/LWJGL/examples/nehe/lesson08
In directory sc8-pr-cvs1:/tmp/cvs-serv18314/lesson08

Added Files:
	Lesson8.java Texture.java 
Log Message:


up we go =)


--- NEW FILE: Lesson8.java ---
CVS Browser:
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/java-game-lib/LWJGL/examples/nehe/lesson08/Lesson8.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 javax.swing.JOptionPane;
import javax.imageio.*;

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

/**
 * $Id: Lesson8.java,v 1.1 2002/11/25 06:53:08 lholden Exp $
 *
 * Blending
 *
 * Credit goes to Tom Stanis and Jeff Molofee (NeHe) whos tutorial this is based on
 *
 * @author Luke Holden
 * @version $Revision: 1.1 $
 */
public class Lesson8 {
    private GL gl;
    private GLU glu;
    
    private boolean done = false;
    private boolean fullscreen = true;
    
    /* Lighting ON / OFF */
    private boolean light;
    /* Blending OFF/ON? ( NEW ) */
    private boolean blend;
    
    private float xrot;
    private float yrot;
    private float xspeed;
    private float yspeed;
    private float z=-5.0f;
    
    /* Ambient Light Values */
    private FloatBuffer lightAmbient = createFloatBuffer(4).put(0.5f).put(0.5f).put(0.5f).put(1.0f);
    /* Diffuse Light Values */
    private FloatBuffer lightDiffuse = createFloatBuffer(4).put(1.0f).put(1.0f).put(1.0f).put(1.0f);
    /* Light Position */
    private FloatBuffer lightPosition = createFloatBuffer(4).put(0.0f).put(0.0f).put(2.0f).put(1.0f);
    
    /* Which Filter To Use */
    private int filter;
    /* Storage for 3 textures */
    private IntBuffer textureBuf = createIntBuffer(3);

    /** Creates a new instance of Lesson */
    public Lesson8() {

    }
    
    /* 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/glass.png");
            if (textureImage[0] == null) {
                throw new Exception("Error: got null from loadBmp()!");
            }
            
            /* Create Three Textures */
            gl.genTextures(3, 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.NEAREST);
            gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_MIN_FILTER, GL.NEAREST);
            gl.texImage2D(GL.TEXTURE_2D, 
                          0, 
                          3, 
                          textureImage[0].getWidth(), 
                          textureImage[0].getHeight(), 
                          0, 
                          GL.RGB, 
                          GL.UNSIGNED_BYTE, 
                          textureImage[0].getPtr());
            
            /* Create Linear Filtered Texture */
            gl.bindTexture(GL.TEXTURE_2D, textureBuf.get(1));
            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());
                        
            /* Create Linear Filtered Texture */
            gl.bindTexture(GL.TEXTURE_2D, textureBuf.get(2));
            gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_MAG_FILTER, GL.LINEAR);
            gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_MIN_FILTER, GL.LINEAR_MIPMAP_NEAREST);           
            glu.build2DMipmaps(GL.TEXTURE_2D,  
                               3,
                               textureImage[0].getWidth(),
                               textureImage[0].getHeight(), 
                               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{    
        /* Jump To Texture Loading Routine */
        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);
            /* Enables Depth Testing */
            gl.enable(GL.DEPTH_TEST);
            /* The Type Of Depth Test To Do */
            gl.depthFunc(GL.LEQUAL);
            /* Really Nice Perspective Calculations */
            gl.hint(GL.PERSPECTIVE_CORRECTION_HINT, GL.NICEST);
            
            /* Setup The Ambient Light */
            gl.lightfv(GL.LIGHT1, GL.AMBIENT, Sys.getDirectBufferAddress(lightAmbient));
            /* Setup The Diffuse Light */
            gl.lightfv(GL.LIGHT1, GL.DIFFUSE, Sys.getDirectBufferAddress(lightDiffuse));
            /* Position The Light */
            gl.lightfv(GL.LIGHT1, GL.POSITION, Sys.getDirectBufferAddress(lightPosition));            
            gl.enable(GL.LIGHT1);
            
            /* Full Brightness, 50% Alpha ( NEW ) */
            gl.color4f(1.0f,1.0f,1.0f,0.5f);
            /* Blending Function For Translucency Based On Source Alpha Value ( NEW ) */
            gl.blendFunc(GL.SRC_ALPHA, GL.ONE);
            
        }
        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);
        
        /* Reset The Current Modelview Matrix */
	gl.loadIdentity();
        /* Move Into The Screen 5 Units */
        gl.translatef(0.0f, 0.0f, z);
        /* Rotate On The X Axis */
        gl.rotatef(xrot, 1.0f, 0.0f, 0.0f);
        /* Rotate On The Y Axis */
        gl.rotatef(yrot, 0.0f, 1.0f, 0.0f);
        /* Select our Texture */
        gl.bindTexture(GL.TEXTURE_2D, textureBuf.get(filter));
        /* build our textured cube */
	gl.begin(GL.QUADS);
            /* Front Face */
            /* Normal Pointing Towards Viewer */
            gl.normal3f( 0.0f, 0.0f, 1.0f);
            /* Bottom Left Of The Texture and Quad */
            gl.texCoord2f(0.0f, 0.0f); gl.vertex3f(-1.0f, -1.0f,  1.0f);
            /* Bottom Right Of The Texture and Quad */
            gl.texCoord2f(1.0f, 0.0f); gl.vertex3f( 1.0f, -1.0f,  1.0f);
            /* Top Right Of The Texture and Quad */
            gl.texCoord2f(1.0f, 1.0f); gl.vertex3f( 1.0f,  1.0f,  1.0f);
            /* Top Left Of The Texture and Quad */
            gl.texCoord2f(0.0f, 1.0f); gl.vertex3f(-1.0f,  1.0f,  1.0f);
            
            /* Back Face */
            /* Normal Pointing Away From Viewer */
            gl.normal3f( 0.0f, 0.0f,-1.0f);
            /* Bottom Right Of The Texture and Quad */
            gl.texCoord2f(1.0f, 0.0f); gl.vertex3f(-1.0f, -1.0f, -1.0f);
            /* Top Right Of The Texture and Quad */
            gl.texCoord2f(1.0f, 1.0f); gl.vertex3f(-1.0f,  1.0f, -1.0f);
            /* Top Left Of The Texture and Quad */
            gl.texCoord2f(0.0f, 1.0f); gl.vertex3f( 1.0f,  1.0f, -1.0f);
            /* Bottom Left Of The Texture and Quad */
            gl.texCoord2f(0.0f, 0.0f); gl.vertex3f( 1.0f, -1.0f, -1.0f);
            
            /* Top Face */
            /* Normal Pointing Up */
            gl.normal3f( 0.0f, 1.0f, 0.0f);
            /* Top Left Of The Texture and Quad */
            gl.texCoord2f(0.0f, 1.0f); gl.vertex3f(-1.0f,  1.0f, -1.0f);
            /* Bottom Left Of The Texture and Quad */
            gl.texCoord2f(0.0f, 0.0f); gl.vertex3f(-1.0f,  1.0f,  1.0f);
            /* Bottom Right Of The Texture and Quad */
            gl.texCoord2f(1.0f, 0.0f); gl.vertex3f( 1.0f,  1.0f,  1.0f);
            /* Top Right Of The Texture and Quad */
            gl.texCoord2f(1.0f, 1.0f); gl.vertex3f( 1.0f,  1.0f, -1.0f);
            
            /* Bottom Face */
            /* Normal Pointing Down */
            gl.normal3f( 0.0f,-1.0f, 0.0f);
            /* Top Right Of The Texture and Quad */
            gl.texCoord2f(1.0f, 1.0f); gl.vertex3f(-1.0f, -1.0f, -1.0f);
            /* Top Left Of The Texture and Quad */
            gl.texCoord2f(0.0f, 1.0f); gl.vertex3f( 1.0f, -1.0f, -1.0f);
            /* Bottom Left Of The Texture and Quad */
            gl.texCoord2f(0.0f, 0.0f); gl.vertex3f( 1.0f, -1.0f,  1.0f);
            /* Bottom Right Of The Texture and Quad */
            gl.texCoord2f(1.0f, 0.0f); gl.vertex3f(-1.0f, -1.0f,  1.0f);
            
            /* Right face */
            /* Normal Pointing Right */
            gl.normal3f( 1.0f, 0.0f, 0.0f);
            /* Bottom Right Of The Texture and Quad */
            gl.texCoord2f(1.0f, 0.0f); gl.vertex3f( 1.0f, -1.0f, -1.0f);
            /* Top Right Of The Texture and Quad */
            gl.texCoord2f(1.0f, 1.0f); gl.vertex3f( 1.0f,  1.0f, -1.0f);
            /* Top Left Of The Texture and Quad */
            gl.texCoord2f(0.0f, 1.0f); gl.vertex3f( 1.0f,  1.0f,  1.0f);
            /* Bottom Left Of The Texture and Quad */
            gl.texCoord2f(0.0f, 0.0f); gl.vertex3f( 1.0f, -1.0f,  1.0f);
            
            /* Left Face */
            /* Normal Pointing Left */
            gl.normal3f(-1.0f, 0.0f, 0.0f);
            /* Bottom Left Of The Texture and Quad */
            gl.texCoord2f(0.0f, 0.0f); gl.vertex3f(-1.0f, -1.0f, -1.0f);
            /* Bottom Right Of The Texture and Quad */
            gl.texCoord2f(1.0f, 0.0f); gl.vertex3f(-1.0f, -1.0f,  1.0f);
            /* Top Right Of The Texture and Quad */
            gl.texCoord2f(1.0f, 1.0f); gl.vertex3f(-1.0f,  1.0f,  1.0f);
            /* Top Left Of The Texture and Quad */
            gl.texCoord2f(0.0f, 1.0f); gl.vertex3f(-1.0f,  1.0f, -1.0f);
	gl.end();

        /* X Axis Rotation */
        xrot+=xspeed;
        /* Y Axis Rotation */
        yrot+=yspeed;
        
	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_PRIOR)) {
            z-=0.02f;
        }
        if (Keyboard.isKeyDown(Keyboard.KEY_NEXT)) {
            z+=0.02f;
        }
        if (Keyboard.isKeyDown(Keyboard.KEY_UP)) {
            xspeed-=0.01f;
        }
        if (Keyboard.isKeyDown(Keyboard.KEY_DOWN)) {
            xspeed+=0.01f;
        }
        if (Keyboard.isKeyDown(Keyboard.KEY_RIGHT)) {
            yspeed+=0.01f;
        }
        if (Keyboard.isKeyDown(Keyboard.KEY_LEFT)) {
            yspeed-=0.01f;
        }
        
        /* 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;
            }
//            /* F1 switch between fullscreen/windowed is buggy...
//             * So for now, we are leaving this ability disabled */            
//            if (Keyboard.key == Keyboard.KEY_F1 && Keyboard.state) {
//                try {
//                    killGLWindow();
//                    fullscreen=!fullscreen;
//                    createGLWindow(640, 480, 16, fullscreen);
//                }
//                catch (Exception e) {
//                    /* We dont want to put exceptions into our loop... so */
//                    e.printStackTrace();
//                    System.exit(1);
//                }
//            }
            if (Keyboard.key == Keyboard.KEY_L && Keyboard.state) {
                light=!light;
                if (!light) {
                    gl.disable(GL.LIGHTING);
                }
                else {
                    gl.enable(GL.LIGHTING);
                }
            }
            if (Keyboard.key == Keyboard.KEY_F && Keyboard.state) {
                filter+=1;
                if (filter>2) {
                    filter=0;
                }
            }
            if (Keyboard.key == Keyboard.KEY_B && Keyboard.state) {
                blend=!blend;
                if(blend) {
                    /* Turn Blending On */
                    gl.enable(GL.BLEND);
                    /* Turn Depth Testing Off */
                    gl.disable(GL.DEPTH_TEST);
		}
		else {
                    /* Turn Blending Off */
                    gl.disable(GL.BLEND);
                    /* Turn Depth Testing On */
                    gl.enable(GL.DEPTH_TEST);
		}

            }
        }
    }
    
    private IntBuffer createIntBuffer(int size) {
        ByteBuffer temp = ByteBuffer.allocateDirect(4 * size);
        temp.order(ByteOrder.nativeOrder());
        
        return temp.asIntBuffer();
    }
    
    private FloatBuffer createFloatBuffer(int size) {
        ByteBuffer temp = ByteBuffer.allocateDirect(4 * size);
        temp.order(ByteOrder.nativeOrder());
        
        return temp.asFloatBuffer();
    }
    
    public static void main(String[] arguments) {
        int err = 0;
        Lesson8 lesson = new Lesson8();
        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/lesson08/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;
    }
    
}