/*
* Copyright 2009 Hao Nguyen
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy of
* the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations under
* the License.
*/
package gwt.g2d.client.math;
import gwt.g2d.shared.math.Vector2;
/**
* Represents a 2D arc.
*
* @author hao1300@gmail.com
*/
public class Arc extends Circle {
private static final long serialVersionUID = -6185219656129001237L;
private double startAngle, endAngle;
private boolean anticlockwise;
/**
* Creates an anticlockwise arc.
*
* @param centerX
* @param centerY
* @param radius
* @param startAngle
* @param endAngle
*/
public Arc(double centerX, double centerY, double radius, double startAngle,
double endAngle) {
this(new Vector2(centerX, centerY), radius, startAngle, endAngle);
}
/**
* Creates an anticlockwise arc.
*
* @param center
* @param radius
* @param startAngle
* @param endAngle
*/
public Arc(Vector2 center, double radius, double startAngle, double endAngle) {
this(center, radius, startAngle, endAngle, true);
}
public Arc(Vector2 center, double radius, double startAngle, double endAngle,
boolean anticlockwise) {
super(center, radius);
this.startAngle = startAngle;
this.endAngle = endAngle;
this.anticlockwise = anticlockwise;
}
public Arc(Arc arc) {
this(arc.getCenter(), arc.getRadius(), arc.getStartAngle(), arc.getEndAngle(),
arc.isAnticlockwise());
}
/**
* Gets the starting angle of the arc.
*/
public final double getStartAngle() {
return startAngle;
}
/**
* Sets the starting angle of the arc.
*/
public final void setStartAngle(double startAngle) {
this.startAngle = startAngle;
}
/**
* Gets the ending angle of the arc.
*/
public final double getEndAngle() {
return endAngle;
}
/**
* Sets the ending angle of the arc.
*/
public final void setEndAngle(double endAngle) {
this.endAngle = endAngle;
}
/**
* Gets whether the start angle to the end angle should be considered as
* anticlockwise direction.
*/
public final boolean isAnticlockwise() {
return anticlockwise;
}
/**
* Sets whether the start angle to the end angle should be considered as
* anticlockwise direction.
*/
public final void setAnticlockwise(boolean anticlockwise) {
this.anticlockwise = anticlockwise;
}
/**
* Offset both the start angle and the end angle by the given amount.
*/
public final void offsetAngle(double angle) {
this.startAngle += angle;
this.endAngle += angle;
}
}