jogl：在SWT中使用OpenGL的模板（SWT_AWT桥接）

SWT与OpenGL集成示例

四滴火

于 2015-04-08 14:40:29 发布

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分类专栏： Eclipse插件开发文章标签： JOGL SWT_AWT

本文链接：https://blog.youkuaiyun.com/sidihuo/article/details/44940605

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本文介绍了一个使用Eclipse SWT和Java OpenGL API (JOGL)集成的示例程序，展示了如何在一个SWT窗口中嵌入OpenGL画布，并实现基本的图形绘制功能。

/*******************************************************************************
 * Copyright (c) 2015, 2015  Technologies Corporation.
 ******************************************************************************/
package test.muban;

import java.awt.FlowLayout;
import java.awt.Frame;

import javax.media.opengl.GL;
import javax.media.opengl.GLAutoDrawable;
import javax.media.opengl.GLCanvas;
import javax.media.opengl.GLCapabilities;
import javax.media.opengl.GLEventListener;
import javax.media.opengl.glu.GLU;
import javax.swing.SwingUtilities;

import org.eclipse.swt.SWT;
import org.eclipse.swt.awt.SWT_AWT;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

import com.sun.opengl.util.FPSAnimator;

public class BasicFrame implements GLEventListener {

	static Display display;

	static Shell shell;

	static FPSAnimator animator;

	public Frame creatSWT() {
		display = Display.getDefault();
		shell = new Shell();
		shell.setSize(550, 550);
		shell.setText("SWT_OpenGL");
		shell.setLayout(null);
		final Composite compSWT = new Composite(shell, SWT.EMBEDDED);// SWT.EMBEDDED必须
		compSWT.setSize(500, 500);
		compSWT.setLocation(0, 0);
		final java.awt.Frame frame = SWT_AWT.new_Frame(compSWT);
		frame.setLayout(new FlowLayout());
		shell.layout();
		shell.open();
		return frame;
	}

	public static void main(final String[] args) {

		final GLCapabilities capabilities = new GLCapabilities();
		final GLCanvas glcanvas = new GLCanvas(capabilities);// 创建画布
		final BasicFrame basicFrame = new BasicFrame();
		glcanvas.addGLEventListener(basicFrame);// basicFrame重写了GLEventListener的画图的方法
		glcanvas.setSize(500, 500);
		animator = new FPSAnimator(glcanvas, 10, true);

		final Frame frame = basicFrame.creatSWT();
		frame.add(glcanvas);// 把画布放进 窗口内

		SwingUtilities.invokeLater(

		new Runnable() {

			@Override
			public void run() {

				animator.start(); // 开始动画线程

			}

		}

		);

		while (!shell.isDisposed()) {
			if (!display.readAndDispatch()) {
				display.sleep();
			}
		}
		animator.stop();
		display.dispose();
	}

	@Override
	public void init(final GLAutoDrawable drawable) { // 初始函数

		final GL gl = drawable.getGL();
		final GLU glu = new GLU();
		gl.glClearColor(0.0f, 0.0f, 250.0f, 1f); // 设置背景颜色
		gl.glViewport(0, 0, 100, 100); // 视点大小
		gl.glMatrixMode(GL.GL_PROJECTION);
		gl.glLoadIdentity();
		// 裁剪横坐标（left，right）纵坐标（bottom，top）范围内的视图，放进GL可见视图中
		glu.gluOrtho2D(0.0, 100, 0.0, 100.0); // 使坐标系统出现在GL里，此时屏幕中最左面是坐标0，右面是500，最下0，嘴上500

	}

	@Override
	public void display(final GLAutoDrawable drawable) { // 画图函数

		final GL gl = drawable.getGL(); // 从GLAutoDrawable获取GL
		gl.glClear(GL.GL_COLOR_BUFFER_BIT); // 填充背景颜色
		gl.glColor3f(250.0f, 0.0f, 0.0f); // 设置GL的画图颜色，也就是画刷的颜色

		gl.glBegin(GL.GL_LINES);

		gl.glVertex2d(5, 5);
		gl.glVertex2d(95, 5);
		gl.glVertex2d(5, 95);
		gl.glVertex2d(95, 95);
		gl.glVertex2d(5, 50);
		gl.glVertex2d(95, 50);
		gl.glVertex2d(50, 5);
		gl.glVertex2d(50, 95);

		gl.glEnd();
		gl.glFlush();

		System.out.println("1");

	}

	@Override
	public void reshape(final GLAutoDrawable drawable, final int x, final int y, final int width, final int height) {

	}

	@Override
	public void displayChanged(final GLAutoDrawable drawable, final boolean modeChanged, final boolean deviceChanged) {

	}
}