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-rw-r--r--src/demos/swt/Snippet209.java141
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+/*******************************************************************************
+/**
+ * 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;
+package demos.swt;
+
+/*
+ * 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.GLProfile;
+import javax.media.opengl.GL2;
+import javax.media.opengl.GLContext;
+import javax.media.opengl.GLDrawableFactory;
+import javax.media.opengl.glu.GLU;
+
+public class Snippet209 {
+ static void drawTorus(GL2 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 GLProfile gl2Profile = GLProfile.get(GLProfile.GL2);
+ 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(gl2Profile).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();
+ GL2 gl = context.getGL().getGL2();
+ 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();
+ GL2 gl = context.getGL().getGL2();
+ 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();
+ GL2 gl = context.getGL().getGL2();
+ 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();
+ }
+}