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Diffstat (limited to 'src/demos')
-rw-r--r-- | src/demos/swt/Snippet209.java | 141 |
1 files changed, 141 insertions, 0 deletions
diff --git a/src/demos/swt/Snippet209.java b/src/demos/swt/Snippet209.java new file mode 100644 index 0000000..d4238e2 --- /dev/null +++ b/src/demos/swt/Snippet209.java @@ -0,0 +1,141 @@ +/******************************************************************************* +/** + * 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(); + } +} |