【JOGL Hello World示例】我们已经学习了如何在JOGL中画一条简单的线。通过改变这条线的坐标, 我们也可以写字母单词。
JOGL Hello World示例
在此示例中, 我们将绘制Hello World的第一个字符（即H W）。
HelloWorld.java
package com.srcmini.jogl;
import javax.media.opengl.*;
import javax.media.opengl.awt.GLCanvas;
import javax.swing.JFrame;
public class HelloWorld implements GLEventListener {@Override
public void init(GLAutoDrawable arg0)
{}@Override
public void display(GLAutoDrawable drawable) {
final GL2 gl = drawable.getGL().getGL2();
//Draw H
gl.glBegin(GL2.GL_LINES);
gl.glVertex2d(-0.8, 0.6);
gl.glVertex2d(-0.8, -0.6);
gl.glVertex2d(-0.8, 0.0);
gl.glVertex2d(-0.4, 0.0);
gl.glVertex2d(-0.4, 0.6);
gl.glVertex2d(-0.4, -0.6);
gl.glEnd();
//Draw W
gl.glBegin(GL2.GL_LINES);
gl.glVertex2d(0.4, 0.6);
gl.glVertex2d(0.4, -0.6);
gl.glVertex2d(0.4, -0.6);
gl.glVertex2d(0.6, 0);
gl.glVertex2d(0.6, 0);
gl.glVertex2d(0.8, -0.6);
gl.glVertex2d(0.8, -0.6);
gl.glVertex2d(0.8, 0.6);
gl.glEnd();
}
@Override
public void reshape(GLAutoDrawable arg0, int arg1, int arg2, int arg3, int arg4)
{}
@Override
public void dispose(GLAutoDrawable arg0)
{}public static void main(String[] args) {final GLProfile gp = GLProfile.get(GLProfile.GL2);
GLCapabilities cap = new GLCapabilities(gp);
final GLCanvas gc = new GLCanvas(cap);
HelloWorld sq = new HelloWorld();
gc.addGLEventListener(sq);
gc.setSize(400, 400);
final JFrame frame = new JFrame("Hello World");
frame.add(gc);
frame.setSize(500, 400);
frame.setVisible(true);
}
}输出：
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