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The SteelSeries is a javabeans component library that contains gauges. You will find linear and radial gauges. In addition you will also find digital displays, indicators from cars and some instruments from airplanes and sailboats.
/*
* Copyright (c) 2012, Gerrit Grunwald
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* Redistributions of source code must retain the above copyright notice, this
* list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
* The names of its contributors may not be used to endorse or promote
* products derived from this software without specific prior written
* permission.
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
package eu.hansolo.steelseries.tools;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.PathIterator;
import java.awt.geom.Point2D;
import java.util.ArrayList;
/**
* @author Gerrit Grunwald
*/
public enum Scaler {
INSTANCE;
/**
* Returns a double that represents the area of the given point array of a polygon
* @param POLYGON
* @param N
* @return a double that represents the area of the given point array of a polygon
*/
private double calcSignedPolygonArea(final Point2D[] POLYGON) {
final int N = POLYGON.length;
int i;
int j;
double area = 0;
for (i = 0; i < N; i++) {
j = (i + 1) % N;
area += POLYGON[i].getX() * POLYGON[j].getY();
area -= POLYGON[i].getY() * POLYGON[j].getX();
}
area /= 2.0;
return (area);
//return(area < 0 ? -area : area); for unsigned
}
/**
* Returns a Point2D object that represents the center of mass of the given point array which represents a
* polygon.
* @param POLYGON
* @return a Point2D object that represents the center of mass of the given point array
*/
public Point2D calcCenterOfMass(final Point2D[] POLYGON) {
final int N = POLYGON.length;
double cx = 0;
double cy = 0;
double area = calcSignedPolygonArea(POLYGON);
final Point2D CENTROID = new Point2D.Double();
int i;
int j;
double factor = 0;
for (i = 0; i < N; i++) {
j = (i + 1) % N;
factor = (POLYGON[i].getX() * POLYGON[j].getY() - POLYGON[j].getX() * POLYGON[i].getY());
cx += (POLYGON[i].getX() + POLYGON[j].getX()) * factor;
cy += (POLYGON[i].getY() + POLYGON[j].getY()) * factor;
}
area *= 6.0f;
factor = 1 / area;
cx *= factor;
cy *= factor;
CENTROID.setLocation(cx, cy);
return CENTROID;
}
/**
* Returns an array of all points of the given shape
* @param SHAPE
* @return an array of all points of the given shape
*/
public Point2D[] getPointArrayOfShape(final Shape SHAPE) {
ArrayList pointList = new ArrayList(32);
final PathIterator PATH_ITERATOR = SHAPE.getPathIterator(null);
int lastMoveToIndex = -1;
while (!PATH_ITERATOR.isDone()) {
final double[] COORDINATES = new double[6];
switch (PATH_ITERATOR.currentSegment(COORDINATES)) {
case PathIterator.SEG_MOVETO:
pointList.add(new Point2D.Double(COORDINATES[0], COORDINATES[1]));
lastMoveToIndex++;
break;
case PathIterator.SEG_LINETO:
pointList.add(new Point2D.Double(COORDINATES[0], COORDINATES[1]));
break;
case PathIterator.SEG_QUADTO:
pointList.add(new Point2D.Double(COORDINATES[0], COORDINATES[1]));
pointList.add(new Point2D.Double(COORDINATES[2], COORDINATES[3]));
break;
case PathIterator.SEG_CUBICTO:
pointList.add(new Point2D.Double(COORDINATES[0], COORDINATES[1]));
pointList.add(new Point2D.Double(COORDINATES[2], COORDINATES[3]));
pointList.add(new Point2D.Double(COORDINATES[4], COORDINATES[5]));
break;
case PathIterator.SEG_CLOSE:
if (lastMoveToIndex >= 0) {
pointList.add(pointList.get(lastMoveToIndex));
}
break;
}
PATH_ITERATOR.next();
}
final Point2D[] POINT_ARRAY = new Point2D[pointList.size()];
return POINT_ARRAY;
}
/**
* Returns a Point2D object that represents the center of mass of the given shape.
* @param SHAPE
* @return a Point2D object that represents the center of mass of the given shape
*/
public Point2D getCentroid(final Shape SHAPE) {
ArrayList pointList = new ArrayList(32);
final PathIterator PATH_ITERATOR = SHAPE.getPathIterator(null);
int lastMoveToIndex = -1;
while (!PATH_ITERATOR.isDone()) {
final double[] COORDINATES = new double[6];
switch (PATH_ITERATOR.currentSegment(COORDINATES)) {
case PathIterator.SEG_MOVETO:
pointList.add(new Point2D.Double(COORDINATES[0], COORDINATES[1]));
lastMoveToIndex++;
break;
case PathIterator.SEG_LINETO:
pointList.add(new Point2D.Double(COORDINATES[0], COORDINATES[1]));
break;
case PathIterator.SEG_QUADTO:
pointList.add(new Point2D.Double(COORDINATES[0], COORDINATES[1]));
pointList.add(new Point2D.Double(COORDINATES[2], COORDINATES[3]));
break;
case PathIterator.SEG_CUBICTO:
pointList.add(new Point2D.Double(COORDINATES[0], COORDINATES[1]));
pointList.add(new Point2D.Double(COORDINATES[2], COORDINATES[3]));
pointList.add(new Point2D.Double(COORDINATES[4], COORDINATES[5]));
break;
case PathIterator.SEG_CLOSE:
if (lastMoveToIndex >= 0) {
pointList.add(pointList.get(lastMoveToIndex));
}
break;
}
PATH_ITERATOR.next();
}
final Point2D[] POINT_ARRAY = new Point2D[pointList.size()];
pointList.toArray(POINT_ARRAY);
return (calcCenterOfMass(POINT_ARRAY));
}
/**
* Returns a Point2D object that represents the center of mass of the given point array
* @param POINT_ARRAY
* @return a Point2D object that represents the center of mass of the given point array
*/
public Point2D getCentroid(final Point2D[] POINT_ARRAY) {
return calcCenterOfMass(POINT_ARRAY);
}
/**
* Returns a scaled version of the given convex shape, calculated by the given scale factor.
* The scaling will be calculated around the centroid of the shape.
* @param SHAPE
* @param SCALE_FACTOR
* @return a scaled version of the given convex shape, calculated around the centroid by the given scale factor.
*/
public java.awt.Shape scale(final Shape SHAPE, final double SCALE_FACTOR) {
final Point2D CENTROID = getCentroid(SHAPE);
final AffineTransform TRANSFORM = AffineTransform.getTranslateInstance((1.0 - SCALE_FACTOR) * CENTROID.getX(), (1.0 - SCALE_FACTOR) * CENTROID.getY());
TRANSFORM.scale(SCALE_FACTOR, SCALE_FACTOR);
return TRANSFORM.createTransformedShape(SHAPE);
}
/**
* Returns a scaled version of the given convex shape, calculated by the given scale factor.
* The scaling will be calculated around the given point.
* @param SHAPE
* @param SCALE_FACTOR
* @param SCALE_CENTER
* @return a scaled version of the given convex shape, calculated around the given point with the given scale factor.
*/
public java.awt.Shape scale(final Shape SHAPE, final double SCALE_FACTOR, final Point2D SCALE_CENTER) {
final AffineTransform TRANSFORM = AffineTransform.getTranslateInstance((1.0 - SCALE_FACTOR) * SCALE_CENTER.getX(), (1.0 - SCALE_FACTOR) * SCALE_CENTER.getY());
TRANSFORM.scale(SCALE_FACTOR, SCALE_FACTOR);
return TRANSFORM.createTransformedShape(SHAPE);
}
}
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