[Java-game-lib-cvs] CVS: LWJGL/examples/nehe/lesson11 Lesson11.java,NONE,1.1 Texture.java,NONE,1.1

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

Update of /cvsroot/java-game-lib/LWJGL/examples/nehe/lesson11
In directory sc8-pr-cvs1:/tmp/cvs-serv18314/lesson11

Added Files:
	Lesson11.java Texture.java 
Log Message:


up we go =)


--- NEW FILE: Lesson11.java ---
CVS Browser:
http://cvs.sourceforge.net/cgi-bin/viewcvs.cgi/java-game-lib/LWJGL/examples/nehe/lesson11/Lesson11.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.imageio.*;

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

/**
 * $Id: Lesson11.java,v 1.1 2002/11/25 06:53:10 lholden Exp $
 *
 * Flag Effect (Waving Texture)
 *
 * Credit goes to Bosco (bo...@ho...) and Jeff Molofee (NeHe) whos tutorial this is based on
 *
 * @author Luke Holden
 * @version $Revision: 1.1 $
 */
public class Lesson11 {    
    private GL gl;
    private GLU glu;
    
    private boolean done = false;
    private boolean fullscreen = true;
    
    private float xrot;
    private float yrot;
    private float zrot;
    
    /* The Array For The Points On The Grid Of Our "Wave" */
    private float[][][] points = new float[45][45][3];
    /* Counter Used To Control How Fast Flag Waves */
    private int wiggle_count = 0;
    /* Temporarily Holds A Floating Point Value */
    private float hold;
    
    private IntBuffer textureBuf = createIntBuffer(1);

    /** Creates a new instance of Lesson */
    public Lesson11() {

    }
    
    /* 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/tim.png");
            if (textureImage[0] == null) {
                throw new Exception("Error: got null from loadBmp()!");
            }
            
            /* Create The Texture */
            gl.genTextures(1, Sys.getDirectBufferAddress(textureBuf));
            
            /* Typical Texture Generation Using Data From The Bitmap */
            gl.bindTexture(GL.TEXTURE_2D, textureBuf.get(0));
            
            
            /* Generate The Texture */
            gl.texImage2D(GL.TEXTURE_2D, 
                          0, 
                          3, 
                          textureImage[0].getWidth(), 
                          textureImage[0].getHeight(), 
                          0, 
                          GL.RGB, 
                          GL.UNSIGNED_BYTE, 
                          textureImage[0].getPtr());

            /* Linear Filtering */
            gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_MIN_FILTER, GL.LINEAR);
            gl.texParameteri(GL.TEXTURE_2D, GL.TEXTURE_MAG_FILTER, GL.LINEAR);

        }
        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 ( NEW ) */
            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);
            
            /* Back Face Is Filled In */
            gl.polygonMode( GL.BACK, GL.FILL );
            /* Front Face Is Drawn With Lines */
            gl.polygonMode( GL.FRONT, GL.LINE );
            
            /* Loop Through The X Plane */
            for(int x=0; x<45; x++) {
                /* Loop Through The Y Plane */
                for(int y=0; y<45; y++) {
                    /* Apply The Wave To Our Mesh */
                    points[x][y][0]=(float) ((x/5.0f)-4.5f);
                    points[x][y][1]=(float) ((y/5.0f)-4.5f);
                    points[x][y][2]=(float) (java.lang.Math.sin((((x/5.0f)*40.0f)/360.0f)*3.141592654*2.0f));
        	}
            }

        }
        catch (Exception e) {
            throw new Exception("Problem initialising GL", e);
        }
    }
    
    private boolean drawGLScene() {
        int x, y;
        /* Used To Break The Flag Into Tiny Quads */
        float float_x, float_y, float_xb, float_yb;
        
        /* Clear The Screen And Depth Buffer */
        gl.clear(GL.COLOR_BUFFER_BIT | GL.DEPTH_BUFFER_BIT);
        /* Reset The Current Matrix */
        gl.loadIdentity();
        
        /* Translate 17 Units Into The Screen */
        gl.translatef(0.0f, 0.0f, -12.0f);
        
        /* 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);
        /* Rotate On The Z Axis */
	gl.rotatef(zrot, 0.0f, 0.0f, 1.0f);

        /* Select our Texture */
        gl.bindTexture(GL.TEXTURE_2D, textureBuf.get(0));

        /* Start Drawing Our Quads */
        gl.begin(GL.QUADS);
        /* Loop Through The X Plane 0-44 (45 Points) */
        for ( x = 0; x < 44; x++ ) {
            /* Loop Through The Y Plane 0-44 (45 Points) */
            for ( y = 0; y < 44; y++ ) {
                float_x = ((float) x) / 44.0f;
                float_y = ((float) y) / 44.0f;
		float_xb = ((float) (x+1)) / 44.0f;
		float_yb = ((float) (y+1)) / 44.0f;
        
                /* First Texture Coordinate (Bottom Left) */
                gl.texCoord2f( float_x, float_y );
		gl.vertex3f( points[x][y][0], points[x][y][1], points[x][y][2] );
		
                /* Second Texture Coordinate (Top Left) */
		gl.texCoord2f( float_x, float_yb );
		gl.vertex3f( points[x][y+1][0], points[x][y+1][1], points[x][y+1][2] );
		
                /* Third Texture Coordinate (Top Right) */
		gl.texCoord2f( float_xb, float_yb );
		gl.vertex3f( points[x+1][y+1][0], points[x+1][y+1][1], points[x+1][y+1][2] );
		
                /* Fourth Texture Coordinate (Bottom Right) */
		gl.texCoord2f( float_xb, float_y );
		gl.vertex3f( points[x+1][y][0], points[x+1][y][1], points[x+1][y][2] );
            }
        }
        gl.end();
        
        /* Used To Slow Down The Wave (Every 2nd Frame Only) */
        if( wiggle_count == 2 ) {
            /* Loop Through The Y Plane */
            for( y = 0; y < 45; y++ ) {
                /* Store Current Value One Left Side Of Wave */
                hold = points[0][y][2];
                /* Loop Through The X Plane */
                for( x = 0; x < 44; x++) {
                    /* Current Wave Value Equals Value To The Right */
                    points[x][y][2] = points[x+1][y][2];
                }
                /* Last Value Becomes The Far Left Stored Value */
                points[44][y][2] = hold;
            }
            /* Set Counter Back To Zero */
            wiggle_count = 0;
        }
        wiggle_count++;

        xrot += 0.3f;
        yrot += 0.2f;
        zrot += 0.4f;
                
	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 toggle effect */
        Keyboard.read();
        for (int i = 0; i < Keyboard.getNumKeyboardEvents(); i++) {
            Keyboard.next();
            if (Keyboard.key == Keyboard.KEY_ESCAPE && Keyboard.state) {
                done = true;
            }
        }
    }
    
    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;
        Lesson11 lesson = new Lesson11();
        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/lesson11/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 06:53:10 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;
    }
    
}