Update of /cvsroot/java-game-lib/LWJGL/examples/nehe/lesson03
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Lesson3.java
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initial commit
--- NEW FILE: Lesson3.java ---
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/*
* 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 org.lwjgl.*;
import org.lwjgl.opengl.*;
import org.lwjgl.input.*;
/**
* $Id: Lesson3.java,v 1.1 2002/11/25 06:24:09 lholden Exp $
*
* Adding Color
*
* Credit goes to Jeff Molofee (NeHe) whos tutorial this is based on
*
* @author Luke Holden
* @version $Revision: 1.1 $
*/
public class Lesson3 {
private GL gl;
private GLU glu;
private boolean done = false;
private boolean fullscreen = true;
/** Creates a new instance of Lesson */
public Lesson3() {
}
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 boolean initGL() {
/* Enables Smooth Shading */
gl.shadeModel(GL.SMOOTH);
/* Black Background */
gl.clearColor(0.0f, 0.0f, 0.0f, 0.0f);
/* 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);
return true;
}
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 Left 1.5 Units And Into The Screen 6.0 */
gl.translatef(-1.5f,0.0f,-6.0f);
/* Draw A Colored Triangle */
gl.begin(GL.TRIANGLES);
/* Top - red */
gl.color3f(1.0f,0.0f,0.0f);
gl.vertex3f( 0.0f, 1.0f, 0.0f);
/* Bottom Left - green */
gl.color3f(0.0f,1.0f,0.0f);
gl.vertex3f(-1.0f,-1.0f, 0.0f);
/* Bottom Right - blue */
gl.color3f(0.0f,0.0f,1.0f);
gl.vertex3f( 1.0f,-1.0f, 0.0f);
gl.end();
/* Move Right 3 Units */
gl.translatef(3.0f,0.0f,0.0f);
/* Draw A Blue Quad*/
gl.color3f(0.5f,0.5f,1.0f);
gl.begin(GL.QUADS);
/* Top Left */
gl.vertex3f(-1.0f, 1.0f, 0.0f);
/* Top Right */
gl.vertex3f( 1.0f, 1.0f, 0.0f);
/* Bottom Right */
gl.vertex3f( 1.0f,-1.0f, 0.0f);
/* Bottom Left */
gl.vertex3f(-1.0f,-1.0f, 0.0f);
gl.end();
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;
}
}
}
public static void main(String[] arguments) {
int err = 0;
Lesson3 lesson = new Lesson3();
try {
lesson.start();
}
catch (Exception e) {
err = 1;
e.printStackTrace();
}
System.exit(err);
}
}
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