Java/SWT JFace Eclipse/OpenGL
draw a rectangle using the org.eclipse.opengl OpenGL binding
<source lang="java">
/*******************************************************************************
* 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: * Sebastian Davids - initial implementation * IBM Corporation *******************************************************************************/
package org.eclipse.swt.snippets; /*
* SWT OpenGL snippet: draw a square * * This snippet requires the experimental org.eclipse.swt.opengl plugin, which * is not included in swt by default. For information on this plugin see * http://www.eclipse.org/swt/opengl/opengl.html * * For a list of all SWT example snippets see * http://www.eclipse.org/swt/snippets/ * * @since 3.2 */
import org.eclipse.opengl.*; import org.eclipse.swt.SWT; import org.eclipse.swt.events.*; import org.eclipse.swt.graphics.*; import org.eclipse.swt.layout.*; import org.eclipse.swt.opengl.*; import org.eclipse.swt.widgets.*; public class Snippet174 { public static void main(String[] args) {
Display display = new Display(); Shell shell = new Shell(display); shell.setText("OpenGL in SWT"); shell.setLayout(new FillLayout()); GLData data = new GLData(); data.doubleBuffer = true; final GLCanvas canvas = new GLCanvas(shell, SWT.NO_BACKGROUND, data); canvas.addControlListener(new ControlAdapter() { public void controlResized(ControlEvent e) { resize(canvas); } }); init(canvas); new Runnable() { public void run() { if (canvas.isDisposed()) return; render(); canvas.swapBuffers(); canvas.getDisplay().timerExec(50, this); } }.run(); shell.open(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose();
} static void init(GLCanvas canvas) {
canvas.setCurrent(); resize(canvas); GL.glClearColor(1.0f, 1.0f, 1.0f, 1.0f); GL.glColor3f(0.0f, 0.0f, 0.0f); GL.glClearDepth(1.0f); GL.glEnable(GL.GL_DEPTH_TEST); GL.glHint(GL.GL_PERSPECTIVE_CORRECTION_HINT, GL.GL_NICEST);
} static void render() {
GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT); GL.glLoadIdentity(); GL.glTranslatef(0.0f, 0.0f, -6.0f); GL.glBegin(GL.GL_QUADS); GL.glVertex3f(-1.0f, 1.0f, 0.0f); GL.glVertex3f(1.0f, 1.0f, 0.0f); GL.glVertex3f(1.0f, -1.0f, 0.0f); GL.glVertex3f(-1.0f, -1.0f, 0.0f); GL.glEnd();
} static void resize(GLCanvas canvas) {
canvas.setCurrent(); Rectangle rect = canvas.getClientArea(); int width = rect.width; int height = Math.max(rect.height, 1); GL.glViewport(0, 0, width, height); GL.glMatrixMode(GL.GL_PROJECTION); GL.glLoadIdentity(); float aspect = (float) width / (float) height; GLU.gluPerspective(45.0f, aspect, 0.5f, 400.0f); GL.glMatrixMode(GL.GL_MODELVIEW); GL.glLoadIdentity();
} }
</source>
draw a rotating torus using the JOGL OpenGL binding
<source lang="java">
/*******************************************************************************
* 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(); }
}
</source>
draw a rotating torus using the LWJGL OpenGL binding
<source lang="java">
/*******************************************************************************
* 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 LWJGL 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 org.lwjgl.opengl.GL11; import org.lwjgl.opengl.GLContext; import org.lwjgl.opengl.glu.GLU; import org.lwjgl.LWJGLException; public class Snippet195 {
static void drawTorus(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); GL11.glBegin(GL11.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; GL11.glNormal3f(cosTheta1 * cosPhi, -sinTheta1 * cosPhi, sinPhi); GL11.glVertex3f(cosTheta1 * dist, -sinTheta1 * dist, r * sinPhi); GL11.glNormal3f(cosTheta * cosPhi, -sinTheta * cosPhi, sinPhi); GL11.glVertex3f(cosTheta * dist, -sinTheta * dist, r * sinPhi); } GL11.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(); try { GLContext.useContext(canvas); } catch(LWJGLException e) { e.printStackTrace(); } 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(); try { GLContext.useContext(canvas); } catch(LWJGLException e) { e.printStackTrace(); } GL11.glViewport(0, 0, bounds.width, bounds.height); GL11.glMatrixMode(GL11.GL_PROJECTION); GL11.glLoadIdentity(); GLU.gluPerspective(45.0f, fAspect, 0.5f, 400.0f); GL11.glMatrixMode(GL11.GL_MODELVIEW); GL11.glLoadIdentity(); } }); GL11.glClearColor(1.0f, 1.0f, 1.0f, 1.0f); GL11.glColor3f(1.0f, 0.0f, 0.0f); GL11.glHint(GL11.GL_PERSPECTIVE_CORRECTION_HINT, GL11.GL_NICEST); GL11.glClearDepth(1.0); GL11.glLineWidth(2); GL11.glEnable(GL11.GL_DEPTH_TEST); shell.setText("SWT/LWJGL Example"); shell.setSize(640, 480); shell.open(); display.asyncExec(new Runnable() { int rot = 0; public void run() { if (!canvas.isDisposed()) { canvas.setCurrent(); try { GLContext.useContext(canvas); } catch(LWJGLException e) { e.printStackTrace(); } GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT); GL11.glClearColor(.3f, .5f, .8f, 1.0f); GL11.glLoadIdentity(); GL11.glTranslatef(0.0f, 0.0f, -10.0f); float frot = rot; GL11.glRotatef(0.15f * rot, 2.0f * frot, 10.0f * frot, 1.0f); GL11.glRotatef(0.3f * rot, 3.0f * frot, 1.0f * frot, 1.0f); rot++; GL11.glPolygonMode(GL11.GL_FRONT_AND_BACK, GL11.GL_LINE); GL11.glColor3f(0.9f, 0.9f, 0.9f); drawTorus(1, 1.9f + ((float) Math.sin((0.004f * frot))), 15, 15); canvas.swapBuffers(); display.asyncExec(this); } } }); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } display.dispose(); }
}
</source>