Add SWT example

1 files changed, 141 insertions, 0 deletions

diff --git a/src/demos/swt/Snippet209.java b/src/demos/swt/Snippet209.java
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+++ b/src/demos/swt/Snippet209.java
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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();
+  }
+}