| /******************************************************************************* |
| * Copyright (c) 2000, 2005 IBM Corporation and others. |
| * All rights reserved. This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License v1.0 |
| * which accompanies this distribution, and is available at |
| * http://www.eclipse.org/legal/epl-v10.html |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.swt.snippets; |
| |
| /* |
| * SWT OpenGL snippet: use JOGL to draw to an SWT GLCanvas |
| * |
| * For a list of all SWT example snippets see |
| * http://www.eclipse.org/swt/snippets/ |
| * |
| * @since 3.2 |
| */ |
| import org.eclipse.swt.*; |
| import org.eclipse.swt.layout.*; |
| import org.eclipse.swt.widgets.*; |
| import org.eclipse.swt.graphics.*; |
| import org.eclipse.swt.opengl.GLCanvas; |
| import org.eclipse.swt.opengl.GLData; |
| |
| import javax.media.opengl.GL; |
| import javax.media.opengl.GLContext; |
| import javax.media.opengl.GLDrawableFactory; |
| import javax.media.opengl.glu.GLU; |
| |
| public class Snippet209 { |
| static void drawTorus(GL gl, float r, float R, int nsides, int rings) { |
| float ringDelta = 2.0f * (float) Math.PI / rings; |
| float sideDelta = 2.0f * (float) Math.PI / nsides; |
| float theta = 0.0f, cosTheta = 1.0f, sinTheta = 0.0f; |
| for (int i = rings - 1; i >= 0; i--) { |
| float theta1 = theta + ringDelta; |
| float cosTheta1 = (float) Math.cos(theta1); |
| float sinTheta1 = (float) Math.sin(theta1); |
| gl.glBegin(GL.GL_QUAD_STRIP); |
| float phi = 0.0f; |
| for (int j = nsides; j >= 0; j--) { |
| phi += sideDelta; |
| float cosPhi = (float) Math.cos(phi); |
| float sinPhi = (float) Math.sin(phi); |
| float dist = R + r * cosPhi; |
| gl.glNormal3f(cosTheta1 * cosPhi, -sinTheta1 * cosPhi, sinPhi); |
| gl.glVertex3f(cosTheta1 * dist, -sinTheta1 * dist, r * sinPhi); |
| gl.glNormal3f(cosTheta * cosPhi, -sinTheta * cosPhi, sinPhi); |
| gl.glVertex3f(cosTheta * dist, -sinTheta * dist, r * sinPhi); |
| } |
| gl.glEnd(); |
| theta = theta1; |
| cosTheta = cosTheta1; |
| sinTheta = sinTheta1; |
| } |
| } |
| |
| public static void main(String [] args) { |
| final Display display = new Display(); |
| Shell shell = new Shell(display); |
| shell.setLayout(new FillLayout()); |
| Composite comp = new Composite(shell, SWT.NONE); |
| comp.setLayout(new FillLayout()); |
| GLData data = new GLData (); |
| data.doubleBuffer = true; |
| final GLCanvas canvas = new GLCanvas(comp, SWT.NONE, data); |
| |
| canvas.setCurrent(); |
| final GLContext context = GLDrawableFactory.getFactory().createExternalGLContext(); |
| |
| canvas.addListener(SWT.Resize, new Listener() { |
| public void handleEvent(Event event) { |
| Rectangle bounds = canvas.getBounds(); |
| float fAspect = (float) bounds.width / (float) bounds.height; |
| canvas.setCurrent(); |
| context.makeCurrent(); |
| GL gl = context.getGL (); |
| gl.glViewport(0, 0, bounds.width, bounds.height); |
| gl.glMatrixMode(GL.GL_PROJECTION); |
| gl.glLoadIdentity(); |
| GLU glu = new GLU(); |
| glu.gluPerspective(45.0f, fAspect, 0.5f, 400.0f); |
| gl.glMatrixMode(GL.GL_MODELVIEW); |
| gl.glLoadIdentity(); |
| context.release(); |
| } |
| }); |
| |
| context.makeCurrent(); |
| GL gl = context.getGL (); |
| gl.glClearColor(1.0f, 1.0f, 1.0f, 1.0f); |
| gl.glColor3f(1.0f, 0.0f, 0.0f); |
| gl.glHint(GL.GL_PERSPECTIVE_CORRECTION_HINT, GL.GL_NICEST); |
| gl.glClearDepth(1.0); |
| gl.glLineWidth(2); |
| gl.glEnable(GL.GL_DEPTH_TEST); |
| context.release(); |
| |
| shell.setText("SWT/JOGL Example"); |
| shell.setSize(640, 480); |
| shell.open(); |
| |
| display.asyncExec(new Runnable() { |
| int rot = 0; |
| public void run() { |
| if (!canvas.isDisposed()) { |
| canvas.setCurrent(); |
| context.makeCurrent(); |
| GL gl = context.getGL (); |
| gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT); |
| gl.glClearColor(.3f, .5f, .8f, 1.0f); |
| gl.glLoadIdentity(); |
| gl.glTranslatef(0.0f, 0.0f, -10.0f); |
| float frot = rot; |
| gl.glRotatef(0.15f * rot, 2.0f * frot, 10.0f * frot, 1.0f); |
| gl.glRotatef(0.3f * rot, 3.0f * frot, 1.0f * frot, 1.0f); |
| rot++; |
| gl.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_LINE); |
| gl.glColor3f(0.9f, 0.9f, 0.9f); |
| drawTorus(gl, 1, 1.9f + ((float) Math.sin((0.004f * frot))), 15, 15); |
| canvas.swapBuffers(); |
| context.release(); |
| display.asyncExec(this); |
| } |
| } |
| }); |
| |
| while (!shell.isDisposed()) { |
| if (!display.readAndDispatch()) |
| display.sleep(); |
| } |
| display.dispose(); |
| } |
| } |