com.googlecode.blaisemath.style.Markers Maven / Gradle / Ivy
/*
* Markers.java
* Created Jan 8, 2011
*/
package com.googlecode.blaisemath.style;
/*
* #%L
* BlaiseGraphics
* --
* Copyright (C) 2014 - 2017 Elisha Peterson
* --
* 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.
* #L%
*/
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import java.awt.Shape;
import java.awt.geom.AffineTransform;
import java.awt.geom.Arc2D;
import java.awt.geom.Area;
import java.awt.geom.Ellipse2D;
import java.awt.geom.GeneralPath;
import java.awt.geom.Point2D;
import java.awt.geom.Rectangle2D;
import java.util.Collections;
import java.util.List;
import java.util.ServiceLoader;
/**
* Provides several custom shapes that can be used to draw points.
*
* @author Elisha Peterson
*/
public final class Markers {
/** Caches markers loaded from resources file. */
private static final List MARKER_CACHE = Lists.newArrayList();
/** Singleton for empty path. */
private static final GeneralPath EMPTY_PATH = new GeneralPath();
//
public static final NoShape NONE = new NoShape();
public static final CircleShape CIRCLE = new CircleShape();
public static final SquareShape SQUARE = new SquareShape();
public static final DiamondShape DIAMOND = new DiamondShape();
public static final TriangleShape TRIANGLE = new TriangleShape();
public static final StarShape STAR = new StarShape();
public static final Star7Shape STAR7 = new Star7Shape();
public static final Star11Shape STAR11 = new Star11Shape();
public static final PlusShape PLUS = new PlusShape();
public static final CrossShape CROSS = new CrossShape();
public static final CrosshairsShape CROSSHAIRS = new CrosshairsShape();
public static final HappyFaceShape HAPPYFACE = new HappyFaceShape();
public static final HouseShape HOUSE = new HouseShape();
public static final SimpleArrowShape ARROW = new SimpleArrowShape();
public static final TrianglePointerShape TRIANGLE_ARROW = new TrianglePointerShape();
public static final TriangleFlagShape ARROWHEAD = new TriangleFlagShape();
public static final TeardropShape TEARDROP = new TeardropShape();
public static final CarShape CAR = new CarShape();
//
/**
* Utility class
*/
private Markers() {
}
/**
* Retrieve list of available shapes.
* @return list of marker constants
*/
public static List getAvailableMarkers() {
if (MARKER_CACHE.isEmpty()) {
ServiceLoader loader = ServiceLoader.load(Marker.class);
Iterables.addAll(MARKER_CACHE, loader);
}
return Collections.unmodifiableList(MARKER_CACHE);
}
/**
* Blank shape, draws nothing
*/
public static class NoShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
return EMPTY_PATH;
}
}
/**
* Circle centered at point
*/
public static class CircleShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
return new Ellipse2D.Double(p.getX() - radius, p.getY() - radius, 2 * radius, 2 * radius);
}
}
/**
* Square
*/
public static class SquareShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
return new Rectangle2D.Double(
p.getX() - radius / Math.sqrt(2),
p.getY() - radius / Math.sqrt(2),
2 * radius / Math.sqrt(2),
2 * radius / Math.sqrt(2));
}
}
/**
* Diamond
*/
public static class DiamondShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
double x = p.getX(), y = p.getY();
GeneralPath gp = new GeneralPath();
gp.moveTo((float) x, (float) (y - radius));
gp.lineTo((float) (x - radius), (float) y);
gp.lineTo((float) x, (float) (y + radius));
gp.lineTo((float) (x + radius), (float) y);
gp.closePath();
return gp;
}
}
/**
* Triangle, with peak pointed up
*/
public static class TriangleShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
double x = p.getX(), y = p.getY();
GeneralPath gp2 = new GeneralPath();
gp2.moveTo((float) x, (float) (y - radius));
gp2.lineTo((float) (x + radius * Math.cos(Math.PI * 1.16667)),
(float) (y - radius * Math.sin(Math.PI * 1.16667)));
gp2.lineTo((float) (x + radius * Math.cos(Math.PI * 1.83333)),
(float) (y - radius * Math.sin(Math.PI * 1.83333)));
gp2.closePath();
return gp2;
}
}
/**
* 5-Pointed Star
*/
public static class StarShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
double x = p.getX(), y = p.getY();
GeneralPath gp5 = new GeneralPath();
gp5.moveTo((float) x, (float) (y - radius));
for (int i = 0; i < 5; i++) {
double theta = Math.PI / 2 + 2 * Math.PI * i / 5;
gp5.lineTo((float) (x + radius * Math.cos(theta)),
(float) (y - radius * Math.sin(theta)));
theta += Math.PI / 5;
gp5.lineTo((float) (x + radius / Math.sqrt(8) * Math.cos(theta)),
(float) (y - radius / Math.sqrt(8) * Math.sin(theta)));
}
gp5.closePath();
return gp5;
}
}
/**
* 7-Pointed Star
*/
public static class Star7Shape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
double x = p.getX(), y = p.getY();
GeneralPath gp6 = new GeneralPath();
gp6.moveTo((float) x, (float) (y - radius));
for (int i = 0; i < 7; i++) {
double theta = Math.PI / 2 + 2 * Math.PI * i / 7;
gp6.lineTo((float) (x + radius * Math.cos(theta)),
(float) (y - radius * Math.sin(theta)));
theta += Math.PI / 7;
gp6.lineTo((float) (x + radius / 2 * Math.cos(theta)),
(float) (y - radius / 2 * Math.sin(theta)));
}
gp6.closePath();
return gp6;
}
}
/**
* 11-Pointed Star
*/
public static class Star11Shape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
double x = p.getX(), y = p.getY();
GeneralPath gp7 = new GeneralPath();
gp7.moveTo((float) x, (float) (y - radius));
for (int i = 0; i < 11; i++) {
double theta = Math.PI / 2 + 2 * Math.PI * i / 11;
gp7.lineTo((float) (x + radius * Math.cos(theta)),
(float) (y - radius * Math.sin(theta)));
theta += Math.PI / 11;
gp7.lineTo((float) (x + radius / 1.5 * Math.cos(theta)),
(float) (y - radius / 1.5 * Math.sin(theta)));
}
gp7.closePath();
return gp7;
}
}
/**
* A "+" shape
*/
public static class PlusShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
double x = p.getX(), y = p.getY();
GeneralPath gp3 = new GeneralPath();
gp3.moveTo((float) x, (float) (y - radius));
gp3.lineTo((float) x, (float) (y + radius));
gp3.moveTo((float) (x - radius), (float) y);
gp3.lineTo((float) (x + radius), (float) y);
return gp3;
}
}
/**
* A "x" shape
*/
public static class CrossShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
double x = p.getX(), y = p.getY();
GeneralPath gp4 = new GeneralPath();
double r2 = 0.7 * radius;
gp4.moveTo((float) (x - r2), (float) (y - r2));
gp4.lineTo((float) (x + r2), (float) (y + r2));
gp4.moveTo((float) (x - r2), (float) (y + r2));
gp4.lineTo((float) (x + r2), (float) (y - r2));
return gp4;
}
}
/**
* Cross-hairs (path only, no fill)
*/
public static class CrosshairsShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
double x = p.getX(), y = p.getY();
GeneralPath gp3 = new GeneralPath();
gp3.moveTo((float) x, (float) (y - radius));
gp3.lineTo((float) x, (float) (y + radius));
gp3.moveTo((float) (x - radius), (float) y);
gp3.lineTo((float) (x + radius), (float) y);
gp3.append(new Ellipse2D.Double(x - .6 * radius, y - .6 * radius, 1.2 * radius, 1.2 * radius), false);
return gp3;
}
}
/**
* Happy face shape
*/
public static class HappyFaceShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
double x = p.getX(), y = p.getY();
Area a = new Area(new Ellipse2D.Double(x - radius, y - radius, 2 * radius, 2 * radius));
a.subtract(new Area(new Ellipse2D.Double(x - radius / 3 - radius / 6, y - radius / 2, radius / 3, radius / 3)));
a.subtract(new Area(new Ellipse2D.Double(x + radius / 3 - radius / 6, y - radius / 2, radius / 3, radius / 3)));
a.subtract(new Area(new Arc2D.Double(x - radius / 2, y - radius / 2, radius, radius, 200, 140, Arc2D.CHORD)));
return a;
}
}
/**
* House shape
*/
public static class HouseShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
double x = p.getX(), y = p.getY();
GeneralPath gp13 = new GeneralPath();
gp13.moveTo(-.9f, -.9f);
gp13.lineTo(.9f, -.9f);
gp13.lineTo(.9f, .4f);
gp13.lineTo(1f, .4f);
gp13.lineTo(.75f, .625f);
gp13.lineTo(.75f, 1f);
gp13.lineTo(.5f, 1f);
gp13.lineTo(.5f, .75f);
gp13.lineTo(0f, 1f);
gp13.lineTo(-1f, .4f);
gp13.lineTo(-.9f, .4f);
gp13.lineTo(-.9f, -.9f);
gp13.closePath();
gp13.transform(new AffineTransform(radius, 0, 0, -radius, x, y));
return gp13;
}
}
/**
* Simple arrow (path only)
*/
public static class SimpleArrowShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
double x = p.getX(), y = p.getY();
GeneralPath gp = new GeneralPath();
gp.moveTo((float) (x + radius * Math.cos(Math.PI * 0.667)),
(float) (y - radius * Math.sin(Math.PI * 0.6667)));
gp.lineTo((float) x, (float) y);
gp.moveTo((float) x, (float) y);
gp.lineTo((float) (x + radius * Math.cos(Math.PI * 0.667)),
(float) (y + radius * Math.sin(Math.PI * 0.6667)));
return AffineTransform.getRotateInstance(angle, x, y).createTransformedShape(gp);
}
}
/**
* Triangle shape (pointed to the side)
*/
public static class TrianglePointerShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
double x = p.getX(), y = p.getY();
GeneralPath gp9 = new GeneralPath();
gp9.moveTo((float) (x + radius), (float) y);
gp9.lineTo((float) (x + radius * Math.cos(Math.PI * 0.6667)),
(float) (y - radius * Math.sin(Math.PI * 0.6667)));
gp9.lineTo((float) (x + radius * Math.cos(Math.PI * 1.3333)),
(float) (y - radius * Math.sin(Math.PI * 1.3333)));
gp9.closePath();
return AffineTransform.getRotateInstance(angle, x, y).createTransformedShape(gp9);
}
}
/**
* Triangle shape (flag)
*/
public static class TriangleFlagShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
double x = p.getX(), y = p.getY();
GeneralPath gp10 = new GeneralPath();
gp10.moveTo((float) (x + radius), (float) y);
gp10.lineTo((float) (x - radius), (float) (y + radius));
gp10.lineTo((float) (x - .5 * radius), (float) y);
gp10.lineTo((float) (x - radius), (float) (y - radius));
gp10.closePath();
return AffineTransform.getRotateInstance(angle, x, y).createTransformedShape(gp10);
}
}
/**
* Teardrop shape
*/
public static class TeardropShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
double x = p.getX(), y = p.getY();
GeneralPath gp11 = new GeneralPath();
gp11.moveTo(-.25f, -.5f);
gp11.curveTo(-1f, -.5f, -1f, .5f, -.25f, .5f);
gp11.curveTo(.5f, .5f, .5f, 0, 1f, 0);
gp11.curveTo(.5f, 0, .5f, -.5f, -.2f, -.5f);
gp11.closePath();
gp11.transform(new AffineTransform(radius, 0, 0, radius, x, y));
return AffineTransform.getRotateInstance(angle, x, y).createTransformedShape(gp11);
}
}
/**
* Car shape
*/
public static class CarShape implements Marker {
@Override
public Shape create(Point2D p, double angle, float radius) {
double x = p.getX(), y = p.getY();
GeneralPath gp12 = new GeneralPath();
gp12.moveTo(1f, 0);
gp12.lineTo(.67f, 0);
// top
gp12.append(new Arc2D.Double(-.33f, -.5f, 1f, 1f, 0, 180, Arc2D.OPEN), true);
// hood
gp12.append(new Arc2D.Double(-.83f, 0f, 1f, .67f, 90, 90, Arc2D.OPEN), true);
// bumper
gp12.append(new Arc2D.Double(-1f, .33f, .33f, .33f, 90, 90, Arc2D.OPEN), true);
gp12.lineTo(-.7f, .5f);
// wheel well
gp12.append(new Arc2D.Double(-.7f, .3f, .4f, .4f, 180, -180, Arc2D.OPEN), true);
gp12.lineTo(.3f, .5f);
// wheel well
gp12.append(new Arc2D.Double(.3f, .3f, .4f, .4f, 180, -180, Arc2D.OPEN), true);
gp12.lineTo(1f, .5f);
gp12.closePath();
Area a = new Area(gp12);
// windows
a.subtract(new Area(new Arc2D.Double(-.2f, -.4f, .7f, .6f, 90, 90, Arc2D.PIE)));
a.subtract(new Area(new Arc2D.Double(-.05f, -.4f, .6f, .6f, 0, 90, Arc2D.PIE)));
// wheels
a.add(new Area(new Ellipse2D.Double(-.67f, .33f, .33f, .33f)));
a.add(new Area(new Ellipse2D.Double(.33f, .33f, .33f, .33f)));
a.transform(new AffineTransform(-radius, 0, 0, radius, x, y));
return AffineTransform.getRotateInstance(angle, x, y).createTransformedShape(a);
}
}
}
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