examples/org.eclipse.swt.opengl.examples/src/org/eclipse/swt/opengl/examples/GradientTab.java - platform/eclipse.platform.swt - Git at Google

 /*******************************************************************************
  * Copyright (c) 2000, 2003 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.opengl.examples;


 import org.eclipse.opengl.*;
 import org.eclipse.swt.*;
 import org.eclipse.swt.layout.*;
 import org.eclipse.swt.widgets.*;

 class GradientTab extends OpenGLTab {
 	private float xPos = 0.0f, yPos = 0.0f, zPos = -7.0f;
 	private float xRot = 180.0f, yRot = 180.0f, zRot = 180.0f;
 	private int currentSelection = 1;
 	private final static float[] BEZIER_COLORS = {
 		0.0f, 1.0f, 0.0f, 0.0f, 0.3f, 0.6f, 0.1f, 0.0f,
 		0.8f, 0.2f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f,
 		0.0f, 0.0f, 1.0f, 0.0f, 0.8f, 0.8f, 0.8f, 0.0f
 	};
 	private final static float[] BEZIER_POINTS = {
 		-1.5f, -1.5f, 4.0f, -0.5f, -1.5f, 2.0f, 0.5f, -1.5f,
 		-1.0f, 1.5f, -1.5f, 2.0f, -1.5f, -0.5f, 1.0f, -0.5f,
 		-0.5f, 3.0f, 0.5f, -0.5f, 0.0f, 1.5f, -0.5f, -1.0f,
 		-1.5f, 0.5f, 4.0f, -0.5f, 0.5f, 0.0f, 0.5f, 0.5f,
 		3.0f, 1.5f, 0.5f, 4.0f, -1.5f, 1.5f, -2.0f, -0.5f,
 		1.5f, -2.0f, 0.5f, 1.5f, 0.0f, 1.5f, 1.5f, -1.0f,
 	};
 	private final static String[] OBJECT_NAMES = { "Bezier", "Square" };

 	/**
 	 * @see OpenGLTab#createControls(Composite)
 	 */
 	void createControls(Composite composite) {
 		Group movementGroup = new Group(composite, SWT.NONE);
 		movementGroup.setText("Translation");
 		movementGroup.setLayout(new GridLayout(2, false));

 		new Label(movementGroup, SWT.NONE).setText("X:");
 		final Slider xMove = new Slider(movementGroup, SWT.NONE);
 		xMove.setIncrement(1);
 		xMove.setMaximum(12);
 		xMove.setMinimum(0);
 		xMove.setThumb(2);
 		xMove.setPageIncrement(2);
 		xMove.setSelection(5);
 		xMove.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event e) {
 				xPos = xMove.getSelection() - 5;
 			}
 		});

 		new Label(movementGroup, SWT.NONE).setText("Y:");
 		final Slider yMove = new Slider(movementGroup, SWT.NONE);
 		yMove.setIncrement(1);
 		yMove.setMaximum(12);
 		yMove.setMinimum(0);
 		yMove.setThumb(2);
 		yMove.setPageIncrement(2);
 		yMove.setSelection(5);
 		yMove.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event e) {
 				yPos = yMove.getSelection() - 5;
 			}
 		});

 		new Label(movementGroup, SWT.NONE).setText("Z:");
 		final Slider zMove = new Slider(movementGroup, SWT.NONE);
 		zMove.setIncrement(1);
 		zMove.setMaximum(12);
 		zMove.setMinimum(0);
 		zMove.setThumb(2);
 		zMove.setPageIncrement(2);
 		zMove.setSelection(5);
 		zMove.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event e) {
 				zPos = zMove.getSelection() - 12;
 			}
 		});

 		Group rotationGroup = new Group(composite, SWT.NONE);
 		rotationGroup.setText("Rotation");
 		rotationGroup.setLayout(new GridLayout(2, false));

 		new Label(rotationGroup, SWT.NONE).setText("X:");
 		final Slider xRotation = new Slider(rotationGroup, SWT.NONE);
 		xRotation.setIncrement(10);
 		xRotation.setMaximum(362);
 		xRotation.setMinimum(0);
 		xRotation.setThumb(2);
 		xRotation.setPageIncrement(20);
 		xRotation.setSelection(180);
 		xRotation.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event e) {
 				xRot = xRotation.getSelection();
 			}
 		});

 		new Label(rotationGroup, SWT.NONE).setText("Y:");
 		final Slider yRotation = new Slider(rotationGroup, SWT.NONE);
 		yRotation.setIncrement(10);
 		yRotation.setMaximum(362);
 		yRotation.setMinimum(0);
 		yRotation.setThumb(2);
 		yRotation.setPageIncrement(20);
 		yRotation.setSelection(180);
 		yRotation.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event e) {
 				yRot = yRotation.getSelection();
 			}
 		});

 		new Label(rotationGroup, SWT.NONE).setText("Z:");
 		final Slider zRotation = new Slider(rotationGroup, SWT.NONE);
 		zRotation.setIncrement(10);
 		zRotation.setMaximum(362);
 		zRotation.setMinimum(0);
 		zRotation.setThumb(2);
 		zRotation.setPageIncrement(20);
 		zRotation.setSelection(180);
 		zRotation.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event e) {
 				zRot = zRotation.getSelection();
 			}
 		});

 		Composite objectGroup = new Composite(composite,SWT.NONE);
 		GridLayout layout = new GridLayout(2,false);
 		layout.marginHeight = 0;
 		layout.marginWidth = 0;
 		objectGroup.setLayout(layout);
 		objectGroup.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

 		new Label(objectGroup, SWT.NONE).setText("Object:");
 		final Combo objectCombo = new Combo(objectGroup, SWT.READ_ONLY);
 		GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
 		data.grabExcessHorizontalSpace = true;
 		objectCombo.setLayoutData(data);
 		objectCombo.setItems(OBJECT_NAMES);
 		objectCombo.select(0);
 		objectCombo.addListener(SWT.Selection, new Listener() {
 			public void handleEvent(Event e) {
 				currentSelection = objectCombo.getSelectionIndex() + 1;
 			}
 		});
 	}

 	/**
 	 * @see OpenGLTab#dispose()
 	 */
 	void dispose() {
 		super.dispose();
 		GL.glDeleteLists(1, 2);
 	}

 	/**
 	 * @see OpenGLTab#getTabText()
 	 */
 	String getTabText() {
 		return "Gradients";
 	}

 	/**
 	 * @see OpenGLTab#init()
 	 */
 	void init() {
 		GL.glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
 		GL.glHint(GL.GL_LINE_SMOOTH_HINT, GL.GL_NICEST);
 		GL.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);
 		GL.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_FILL);
 		GL.glMap2f(GL.GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, BEZIER_POINTS);
 		GL.glMap2f(GL.GL_MAP2_COLOR_4, 0, 1, 4, 1, 0, 1, 4, 6, BEZIER_COLORS);
 		GL.glMapGrid2f(20, 0.0f, 1.0f, 20, 0.0f, 1.0f);
 		GL.glShadeModel(GL.GL_SMOOTH);
 		GL.glEnable(GL.GL_LINE_SMOOTH);
 		GL.glEnable(GL.GL_LINE_STIPPLE);
 		GL.glEnable(GL.GL_BLEND);
 		GL.glEnable(GL.GL_MAP2_COLOR_4);
 		GL.glEnable(GL.GL_MAP2_VERTEX_3);
 		GL.glEnable(GL.GL_DEPTH_TEST);

 		// create display lists
 		GL.glNewList(1, GL.GL_COMPILE);
 		GL.glEvalMesh2(GL.GL_FILL, 0, 20, 0, 20);
 		GL.glEndList();
 		GL.glNewList(2, GL.GL_COMPILE);
 		GL.glBegin(GL.GL_TRIANGLE_FAN);
 		GL.glColor3f(0.0f, 1.0f, 0.0f);
 		GL.glVertex3f(0.0f, 0.0f, 0.0f);
 		GL.glColor3f(1.0f, 0.0f, 0.0f);
 		GL.glVertex3f(0.0f, 2.0f, 0.0f);
 		GL.glColor3f(0.0f, 1.0f, 0.0f);
 		GL.glVertex3f(-2.0f, 2.0f, 0.0f);
 		GL.glColor3f(0.0f, 0.0f, 1.0f);
 		GL.glVertex3f(-2.0f, 0.0f, 0.0f);
 		GL.glColor3f(0.0f, 1.0f, 0.0f);
 		GL.glVertex3f(-2.0f, -2.0f, 0.0f);
 		GL.glColor3f(1.0f, 0.0f, 0.0f);
 		GL.glVertex3f(0.0f, -2.0f, 0.0f);
 		GL.glColor3f(0.0f, 1.0f, 0.0f);
 		GL.glVertex3f(2.0f, -2.0f, 0.0f);
 		GL.glColor3f(0.0f, 0.0f, 1.0f);
 		GL.glVertex3f(2.0f, 0.0f, 0.0f);
 		GL.glColor3f(0.0f, 1.0f, 0.0f);
 		GL.glVertex3f(2.0f, 2.0f, 0.0f);
 		GL.glColor3f(1.0f, 0.0f, 0.0f);
 		GL.glVertex3f(0.0f, 2.0f, 0.0f);
 		GL.glEnd();
 		GL.glEndList();
 	}

 	/**
 	 * @see OpenGLTab#renderScene()
 	 */
 	void renderScene() {
 		GL.glClear(GL.GL_COLOR_BUFFER_BIT);
 		GL.glLoadIdentity();
 		GL.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT);
 		GL.glTranslatef(xPos, yPos, zPos);
 		GL.glRotatef(xRot, 1.0f, 0.0f, 0.0f);
 		GL.glRotatef(yRot, 0.0f, 1.0f, 0.0f);
 		GL.glRotatef(zRot, 0.0f, 0.0f, 1.0f);
 		GL.glColor3f(1.0f, 0.0f, 0.0f);
 		GL.glCallList(currentSelection);
 	}
 }
	/*******************************************************************************
	* Copyright (c) 2000, 2003 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.opengl.examples;


	import org.eclipse.opengl.*;
	import org.eclipse.swt.*;
	import org.eclipse.swt.layout.*;
	import org.eclipse.swt.widgets.*;

	class GradientTab extends OpenGLTab {
	private float xPos = 0.0f, yPos = 0.0f, zPos = -7.0f;
	private float xRot = 180.0f, yRot = 180.0f, zRot = 180.0f;
	private int currentSelection = 1;
	private final static float[] BEZIER_COLORS = {
	0.0f, 1.0f, 0.0f, 0.0f, 0.3f, 0.6f, 0.1f, 0.0f,
	0.8f, 0.2f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 0.0f,
	0.0f, 0.0f, 1.0f, 0.0f, 0.8f, 0.8f, 0.8f, 0.0f
	};
	private final static float[] BEZIER_POINTS = {
	-1.5f, -1.5f, 4.0f, -0.5f, -1.5f, 2.0f, 0.5f, -1.5f,
	-1.0f, 1.5f, -1.5f, 2.0f, -1.5f, -0.5f, 1.0f, -0.5f,
	-0.5f, 3.0f, 0.5f, -0.5f, 0.0f, 1.5f, -0.5f, -1.0f,
	-1.5f, 0.5f, 4.0f, -0.5f, 0.5f, 0.0f, 0.5f, 0.5f,
	3.0f, 1.5f, 0.5f, 4.0f, -1.5f, 1.5f, -2.0f, -0.5f,
	1.5f, -2.0f, 0.5f, 1.5f, 0.0f, 1.5f, 1.5f, -1.0f,
	};
	private final static String[] OBJECT_NAMES = { "Bezier", "Square" };

	/**
	* @see OpenGLTab#createControls(Composite)
	*/
	void createControls(Composite composite) {
	Group movementGroup = new Group(composite, SWT.NONE);
	movementGroup.setText("Translation");
	movementGroup.setLayout(new GridLayout(2, false));

	new Label(movementGroup, SWT.NONE).setText("X:");
	final Slider xMove = new Slider(movementGroup, SWT.NONE);
	xMove.setIncrement(1);
	xMove.setMaximum(12);
	xMove.setMinimum(0);
	xMove.setThumb(2);
	xMove.setPageIncrement(2);
	xMove.setSelection(5);
	xMove.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event e) {
	xPos = xMove.getSelection() - 5;
	}
	});

	new Label(movementGroup, SWT.NONE).setText("Y:");
	final Slider yMove = new Slider(movementGroup, SWT.NONE);
	yMove.setIncrement(1);
	yMove.setMaximum(12);
	yMove.setMinimum(0);
	yMove.setThumb(2);
	yMove.setPageIncrement(2);
	yMove.setSelection(5);
	yMove.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event e) {
	yPos = yMove.getSelection() - 5;
	}
	});

	new Label(movementGroup, SWT.NONE).setText("Z:");
	final Slider zMove = new Slider(movementGroup, SWT.NONE);
	zMove.setIncrement(1);
	zMove.setMaximum(12);
	zMove.setMinimum(0);
	zMove.setThumb(2);
	zMove.setPageIncrement(2);
	zMove.setSelection(5);
	zMove.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event e) {
	zPos = zMove.getSelection() - 12;
	}
	});

	Group rotationGroup = new Group(composite, SWT.NONE);
	rotationGroup.setText("Rotation");
	rotationGroup.setLayout(new GridLayout(2, false));

	new Label(rotationGroup, SWT.NONE).setText("X:");
	final Slider xRotation = new Slider(rotationGroup, SWT.NONE);
	xRotation.setIncrement(10);
	xRotation.setMaximum(362);
	xRotation.setMinimum(0);
	xRotation.setThumb(2);
	xRotation.setPageIncrement(20);
	xRotation.setSelection(180);
	xRotation.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event e) {
	xRot = xRotation.getSelection();
	}
	});

	new Label(rotationGroup, SWT.NONE).setText("Y:");
	final Slider yRotation = new Slider(rotationGroup, SWT.NONE);
	yRotation.setIncrement(10);
	yRotation.setMaximum(362);
	yRotation.setMinimum(0);
	yRotation.setThumb(2);
	yRotation.setPageIncrement(20);
	yRotation.setSelection(180);
	yRotation.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event e) {
	yRot = yRotation.getSelection();
	}
	});

	new Label(rotationGroup, SWT.NONE).setText("Z:");
	final Slider zRotation = new Slider(rotationGroup, SWT.NONE);
	zRotation.setIncrement(10);
	zRotation.setMaximum(362);
	zRotation.setMinimum(0);
	zRotation.setThumb(2);
	zRotation.setPageIncrement(20);
	zRotation.setSelection(180);
	zRotation.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event e) {
	zRot = zRotation.getSelection();
	}
	});

	Composite objectGroup = new Composite(composite,SWT.NONE);
	GridLayout layout = new GridLayout(2,false);
	layout.marginHeight = 0;
	layout.marginWidth = 0;
	objectGroup.setLayout(layout);
	objectGroup.setLayoutData(new GridData(GridData.HORIZONTAL_ALIGN_FILL));

	new Label(objectGroup, SWT.NONE).setText("Object:");
	final Combo objectCombo = new Combo(objectGroup, SWT.READ_ONLY);
	GridData data = new GridData(GridData.HORIZONTAL_ALIGN_FILL);
	data.grabExcessHorizontalSpace = true;
	objectCombo.setLayoutData(data);
	objectCombo.setItems(OBJECT_NAMES);
	objectCombo.select(0);
	objectCombo.addListener(SWT.Selection, new Listener() {
	public void handleEvent(Event e) {
	currentSelection = objectCombo.getSelectionIndex() + 1;
	}
	});
	}

	/**
	* @see OpenGLTab#dispose()
	*/
	void dispose() {
	super.dispose();
	GL.glDeleteLists(1, 2);
	}

	/**
	* @see OpenGLTab#getTabText()
	*/
	String getTabText() {
	return "Gradients";
	}

	/**
	* @see OpenGLTab#init()
	*/
	void init() {
	GL.glClearColor(1.0f, 1.0f, 1.0f, 1.0f);
	GL.glHint(GL.GL_LINE_SMOOTH_HINT, GL.GL_NICEST);
	GL.glBlendFunc(GL.GL_SRC_ALPHA, GL.GL_ONE_MINUS_SRC_ALPHA);
	GL.glPolygonMode(GL.GL_FRONT_AND_BACK, GL.GL_FILL);
	GL.glMap2f(GL.GL_MAP2_VERTEX_3, 0, 1, 3, 4, 0, 1, 12, 4, BEZIER_POINTS);
	GL.glMap2f(GL.GL_MAP2_COLOR_4, 0, 1, 4, 1, 0, 1, 4, 6, BEZIER_COLORS);
	GL.glMapGrid2f(20, 0.0f, 1.0f, 20, 0.0f, 1.0f);
	GL.glShadeModel(GL.GL_SMOOTH);
	GL.glEnable(GL.GL_LINE_SMOOTH);
	GL.glEnable(GL.GL_LINE_STIPPLE);
	GL.glEnable(GL.GL_BLEND);
	GL.glEnable(GL.GL_MAP2_COLOR_4);
	GL.glEnable(GL.GL_MAP2_VERTEX_3);
	GL.glEnable(GL.GL_DEPTH_TEST);

	// create display lists
	GL.glNewList(1, GL.GL_COMPILE);
	GL.glEvalMesh2(GL.GL_FILL, 0, 20, 0, 20);
	GL.glEndList();
	GL.glNewList(2, GL.GL_COMPILE);
	GL.glBegin(GL.GL_TRIANGLE_FAN);
	GL.glColor3f(0.0f, 1.0f, 0.0f);
	GL.glVertex3f(0.0f, 0.0f, 0.0f);
	GL.glColor3f(1.0f, 0.0f, 0.0f);
	GL.glVertex3f(0.0f, 2.0f, 0.0f);
	GL.glColor3f(0.0f, 1.0f, 0.0f);
	GL.glVertex3f(-2.0f, 2.0f, 0.0f);
	GL.glColor3f(0.0f, 0.0f, 1.0f);
	GL.glVertex3f(-2.0f, 0.0f, 0.0f);
	GL.glColor3f(0.0f, 1.0f, 0.0f);
	GL.glVertex3f(-2.0f, -2.0f, 0.0f);
	GL.glColor3f(1.0f, 0.0f, 0.0f);
	GL.glVertex3f(0.0f, -2.0f, 0.0f);
	GL.glColor3f(0.0f, 1.0f, 0.0f);
	GL.glVertex3f(2.0f, -2.0f, 0.0f);
	GL.glColor3f(0.0f, 0.0f, 1.0f);
	GL.glVertex3f(2.0f, 0.0f, 0.0f);
	GL.glColor3f(0.0f, 1.0f, 0.0f);
	GL.glVertex3f(2.0f, 2.0f, 0.0f);
	GL.glColor3f(1.0f, 0.0f, 0.0f);
	GL.glVertex3f(0.0f, 2.0f, 0.0f);
	GL.glEnd();
	GL.glEndList();
	}

	/**
	* @see OpenGLTab#renderScene()
	*/
	void renderScene() {
	GL.glClear(GL.GL_COLOR_BUFFER_BIT);
	GL.glLoadIdentity();
	GL.glClear(GL.GL_COLOR_BUFFER_BIT \| GL.GL_DEPTH_BUFFER_BIT);
	GL.glTranslatef(xPos, yPos, zPos);
	GL.glRotatef(xRot, 1.0f, 0.0f, 0.0f);
	GL.glRotatef(yRot, 0.0f, 1.0f, 0.0f);
	GL.glRotatef(zRot, 0.0f, 0.0f, 1.0f);
	GL.glColor3f(1.0f, 0.0f, 0.0f);
	GL.glCallList(currentSelection);
	}
	}