Here you can find the source of drawThickLine(Graphics g, int x1, int y1, int x2, int y2, int thickness)
| Parameter | Description |
|---|---|
| g | Graphics context to paint on |
| x1 | x coordinates of the line start point |
| y1 | y coordinates of the line start point |
| x2 | x coordinates of the line end point |
| y2 | y coordinates of the line end point |
| thickness | The thickness of the line |
public static void drawThickLine(Graphics g, int x1, int y1, int x2, int y2, int thickness)
//package com.java2s; /**************************************************************************************** * Copyright (c) 2009 Armin Widegreen <armin.widegreen@gmail.com> * * Dirk Reske <email@dirkreske.de> * * * * This program is free software; you can redistribute it and/or modify it under * * the terms of the GNU General Public License as published by the Free Software * * Foundation, either version 3 of the License, or (at your option) any later * * version. * * * * This program is distributed in the hope that it will be useful, but WITHOUT ANY * * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A * * PARTICULAR PURPOSE. See the GNU General Public License for more details. * * * * You should have received a copy of the GNU General Public License along with * * this program. If not, see <http://www.gnu.org/licenses/>. * ****************************************************************************************/ import java.awt.Graphics; public class Main { /**/* w w w . j a v a 2 s.com*/ * Draws a line with a specified thickness * * @param g * Graphics context to paint on * @param x1 * x coordinates of the line start point * @param y1 * y coordinates of the line start point * @param x2 * x coordinates of the line end point * @param y2 * y coordinates of the line end point * @param thickness * The thickness of the line */ public static void drawThickLine(Graphics g, int x1, int y1, int x2, int y2, int thickness) { if (thickness == 1) { g.drawLine(x1, y1, x2, y2); } else { // The thick line is in fact a filled polygon int dX = x2 - x1; int dY = y2 - y1; // line length double lineLength = Math.sqrt(dX * dX + dY * dY); double scale = (double) (thickness) / (2 * lineLength); // The x,y increments from an endpoint needed to create a // rectangle... double ddx = -scale * (double) dY; double ddy = scale * (double) dX; ddx += (ddx > 0) ? 0.5 : -0.5; ddy += (ddy > 0) ? 0.5 : -0.5; int dx = (int) ddx; int dy = (int) ddy; // Now we can compute the corner points... int[] xPoints = new int[4]; int[] yPoints = new int[4]; xPoints[0] = x1 + dx; yPoints[0] = y1 + dy; xPoints[1] = x1 - dx; yPoints[1] = y1 - dy; xPoints[2] = x2 - dx; yPoints[2] = y2 - dy; xPoints[3] = x2 + dx; yPoints[3] = y2 + dy; g.fillPolygon(xPoints, yPoints, 4); } } }