Mercurial > projects > dwt2
view org.eclipse.draw2d/src/org/eclipse/draw2d/geometry/Transform.d @ 16:dbfb303e8fb0
first complete successful compile (win-only)
author | Frank Benoit <benoit@tionex.de> |
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date | Wed, 18 Mar 2009 08:56:47 +0100 |
parents | bc29606a740c |
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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 * Port to the D programming language: * Frank Benoit <benoit@tionex.de> *******************************************************************************/ module org.eclipse.draw2d.geometry.Transform; import java.lang.all; import org.eclipse.draw2d.geometry.Point; /** * Provides support for transformations of scaling, translation and rotation. */ public class Transform { private double scaleX = 1.0, scaleY = 1.0, dx, dy, cos = 1.0, sin; /** * Sets the value for the amount of scaling to be done along both axes. * * @param scale Scale factor * @since 2.0 */ public void setScale(double scale) { scaleX = scaleY = scale; } /** * Sets the value for the amount of scaling to be done along X and Y axes * individually. * * @param x Amount of scaling on X axis * @param y Amount of scaling on Y axis * @since 2.0 */ public void setScale(double x, double y) { scaleX = x; scaleY = y; } /** * Sets the rotation angle. * * @param angle Angle of rotation * @since 2.0 */ public void setRotation(double angle) { cos = Math.cos(angle); sin = Math.sin(angle); } /** * Sets the translation amounts for both axes. * * @param x Amount of shift on X axis * @param y Amount of shift on Y axis * @since 2.0 */ public void setTranslation(double x, double y) { dx = x; dy = y; } /** * Returns a new transformed Point of the input Point based on the transformation * values set. * * @param p Point being transformed * @return The transformed Point * @since 2.0 */ public Point getTransformed(Point p) { double x = p.x; double y = p.y; double temp; x *= scaleX; y *= scaleY; temp = x * cos - y * sin; y = x * sin + y * cos; x = temp; return new Point(cast(double)Math.round(x + dx), cast(double)Math.round(y + dy)); } }