JAVA的OPENGL，JOGL入门实例----不断变色的点阵（源代码）

来源：互联网发布：豆果美食软件编辑：程序博客网时间：2024/05/28 18:45

原文：http://blog.csdn.net/sidihuo/article/details/44035015

第一个类（代码解读）

[java] view plain copy

package test1.opengl;
import java.awt.BorderLayout;
import java.awt.Component;
import java.awt.Dimension;
import java.awt.HeadlessException;
import java.awt.Toolkit;
import javax.media.opengl.GLCanvas;
import javax.media.opengl.GLCapabilities;
import javax.swing.JFrame;
import javax.swing.SwingUtilities;
import com.sun.opengl.util.Animator;
import com.sun.opengl.util.FPSAnimator;
public class SecondJoglApp extends JFrame {
public static Animator animator = null;
public GLCanvas canvas = null;
public SecondJoglApp() throws HeadlessException {
super("第二个JOGL");
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
// 初始化GLCapabilities
final GLCapabilities glcaps = new GLCapabilities();
canvas = new GLCanvas(glcaps); // 初试化GLcanvas,用法参照第一章
canvas.addGLEventListener(new SecondGLEventListener()); // GLcanvas添加GLEventListener
getContentPane().add(canvas, BorderLayout.CENTER); // 给窗体panel添加GLcanvas
animator = new FPSAnimator(canvas, 10, true); // 本章重点，给canvas添加动画线程，每秒10帧
setSize(500, 300);
centerWindow(this);
}
public void centerWindow(final Component frame) { // 把窗体居中
final Dimension screenSize =
Toolkit.getDefaultToolkit().getScreenSize();
final Dimension frameSize = frame.getSize();
if (frameSize.width > screenSize.width) {
frameSize.width = screenSize.width;
}
if (frameSize.height > screenSize.height) {
frameSize.height = screenSize.height;
}
frame.setLocation(
screenSize.width - frameSize.width >> 1,
screenSize.height - frameSize.height >> 1
);
}
public static void main(final String[] args) {
// TODO Auto-generated method stub
final SecondJoglApp app = new SecondJoglApp();
// 显示窗体
SwingUtilities.invokeLater(
new Runnable() {
@Override
public void run() {
app.setVisible(true);
}
}
);
SwingUtilities.invokeLater(
new Runnable() {
@Override
public void run() {
animator.start(); // 开始动画线程
}
}
);
}
}

第二个类

[java] view plain copy

package test1.opengl;
import javax.media.opengl.GL;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.glu.GLU;
public class SecondGLEventListener implements GLEventListener {
public SecondGLEventListener() {
// TODO Auto-generated constructor stub
}
@Override
public void display(final GLAutoDrawable arg0) { // 画图函数
// TODO Auto-generated method stub
float red = (float) (Math.random() * 1.0f); // 随机红
float green = (float) (Math.random() * 1.0f); // 随机绿
float blue = (float) (Math.random() * 1.0f); // 随机蓝
final GL gl = arg0.getGL(); // 从GLAutoDrawable获取GL
gl.glClear(GL.GL_COLOR_BUFFER_BIT); // 填充背景颜色
gl.glPointSize(5.0f); // 设置点的大小
for (int i = 0; i < 50; i++) { // 画点
red -= .09f; // 红色值递减
green -= .12f; // 绿色值递减
blue -= .15f; // 蓝色值递减
if (red < 0.15) {
red = 1.0f;
}
if (green < 0.15) {
green = 1.0f;
}
if (blue < 0.15) {
blue = 1.0f;
}
gl.glColor3f(red, green, blue); // 设置GL的画图颜色，也就是画刷的颜色
gl.glBegin(GL.GL_POINTS);
gl.glVertex2i(i * 10, 150); // 画点由glBegin(GL.GL_POINTS)开始，glEnd()结束
gl.glEnd();
}
}
@Override
public void displayChanged(final GLAutoDrawable arg0, final boolean arg1, final boolean arg2) {
// TODO Auto-generated method stub
}
@Override
public void init(final GLAutoDrawable gld) { // 初始函数
// TODO Auto-generated method stub
final GL gl = gld.getGL();
final GLU glu = new GLU();
gl.glClearColor(0.0f, 0.0f, 0.0f, 1.0f); // 设置背景颜色
gl.glViewport(0, 0, 500, 300); // 视点大小
gl.glMatrixMode(GL.GL_PROJECTION);
gl.glLoadIdentity();
glu.gluOrtho2D(0.0, 500.0, 0.0, 300.0); // 使坐标系统出现在GL里
}
@Override
public void reshape(final GLAutoDrawable arg0, final int arg1, final int arg2, final int arg3,
final int arg4) {
// TODO Auto-generated method stub
}
}

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JAVA的OPENGL，JOGL入门实例----不断变色的点阵 （源代码）

JAVA的OPENGL，JOGL入门实例----不断变色的点阵（源代码）