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267 lines
10 KiB
267 lines
10 KiB
// htmlPlotter.java
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// ---------------------------
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// (C) by Michael Peter Christen; mc@anomic.de
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// first published on http://www.anomic.de
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// Frankfurt, Germany, 2004
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// last major change: 16.09.2004
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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//
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// Using this software in any meaning (reading, learning, copying, compiling,
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// running) means that you agree that the Author(s) is (are) not responsible
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// for cost, loss of data or any harm that may be caused directly or indirectly
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// by usage of this softare or this documentation. The usage of this software
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// is on your own risk. The installation and usage (starting/running) of this
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// software may allow other people or application to access your computer and
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// any attached devices and is highly dependent on the configuration of the
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// software which must be done by the user of the software; the author(s) is
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// (are) also not responsible for proper configuration and usage of the
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// software, even if provoked by documentation provided together with
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// the software.
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//
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// Any changes to this file according to the GPL as documented in the file
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// gpl.txt aside this file in the shipment you received can be done to the
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// lines that follows this copyright notice here, but changes must not be
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// done inside the copyright notive above. A re-distribution must contain
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// the intact and unchanged copyright notice.
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// Contributions and changes to the program code must be marked as such.
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package de.anomic.tools;
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import java.io.File;
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import java.io.IOException;
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import de.anomic.server.serverFileUtils;
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public class htmlPlotter {
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private byte[][][] grid;
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int width, height;
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byte[] defaultCol;
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public htmlPlotter(int width, int height, String defaultCol) {
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this.width = width;
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this.height = height;
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this.defaultCol = parseCol(defaultCol);
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grid = new byte[width][height][3];
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for (int x = 0; x < width; x++)
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for (int y = 0; y < height; y++) grid[x][y] = null;
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}
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private byte[] parseCol(String col) {
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byte[] c = new byte[3];
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c[0] = (byte) Integer.parseInt(col.substring(0,2), 16);
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c[1] = (byte) Integer.parseInt(col.substring(2,4), 16);
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c[2] = (byte) Integer.parseInt(col.substring(4,6), 16);
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return c;
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}
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private String genCol(byte[] c) {
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if (c == null) c = defaultCol;
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return hex2(c[0]) + hex2(c[1]) + hex2(c[2]);
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}
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private String hex2(byte b) {
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String h = Integer.toHexString(((int) b) & 0xff);
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if (h.length() == 1) return "0" + h; else return h;
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}
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public void plot(int x, int y, String col) {
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plot(x, y, parseCol(col));
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}
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public void plot(int x, int y, byte[] c) {
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if ((x < 0) || (x >= width)) return;
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if ((y < 0) || (y >= height)) return;
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grid[x][y] = c;
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}
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private boolean equalCol(byte[] a, byte[] b) {
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if ((a == null) && (b == null)) return true;
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if ((a == null) || (b == null)) return false;
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return ((a[0] == b[0]) && (a[1] == b[1]) && (a[2] == b[2]));
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}
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public String toHTML() {
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String s = "<table border=\"0\" cellspacing=\"0\" cellpadding=\"0\" width=\"" + width +"\">\n\r";
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byte[] col;
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int x, i, l;
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for (int y = height - 1; y >= 0; y--) {
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s += "<tr height=\"1\">";
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x = 0;
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while (x < width) {
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i = x + 1;
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col = grid[x][y];
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while ((i < width) && (equalCol(grid[i][y], col))) i++;
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l = i - x;
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x = i;
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if (l == 1)
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s += "<td width=\"1\" bgcolor=\"#" + genCol(col) + "\"></td>";
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else
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s += "<td width=\"1\" bgcolor=\"#" + genCol(col) + "\" rowspan=\"" + l + "\"></td>";
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}
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s += "</tr>\n\r";
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}
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s += "</table>\n\r";
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return s;
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}
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public void draw(int Ax, int Ay, int Bx, int By, String col) {
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// Bresenham's line drawing algorithm
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byte[] Color = parseCol(col);
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int dX = Math.abs(Bx-Ax);
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int dY = Math.abs(By-Ay);
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int Xincr, Yincr;
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if (Ax > Bx) Xincr=-1; else Xincr=1;
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if (Ay > By) Yincr=-1; else Yincr=1;
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if (dX >= dY) {
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int dPr = dY<<1;
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int dPru = dPr - (dX<<1);
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int P = dPr - dX;
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for (; dX>=0; dX--) {
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plot(Ax, Ay, Color);
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if (P > 0) {
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Ax+=Xincr;
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Ay+=Yincr;
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P+=dPru;
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} else {
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Ax+=Xincr;
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P+=dPr;
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}
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}
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} else {
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int dPr = dX<<1;
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int dPru = dPr - (dY<<1);
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int P = dPr - dY;
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for (; dY>=0; dY--) {
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plot(Ax, Ay, Color);
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if (P > 0) {
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Ax+=Xincr;
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Ay+=Yincr;
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P+=dPru;
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} else {
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Ay+=Yincr;
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P+=dPr;
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}
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}
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}
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}
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public static void main(String[] args) {
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htmlPlotter plotter = new htmlPlotter(200, 100, "FFFFFF");
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plotter.plot(0,0,"000000"); plotter.plot(33,50,"000000"); plotter.plot(36,50,"000000");
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//plotter.draw(10,10,170,88,"AAAAAA");
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try {
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serverFileUtils.write(("<html><body>" + plotter.toHTML() + "</body></html>").getBytes(), new File("D:\\bin\\test.html"));
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} catch (IOException e) {
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e.printStackTrace();
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}
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System.out.println(plotter.toHTML());
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}
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}
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/*
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/============================================================================
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// b r e s l i n e . c
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//
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// VERSION 1: draws only from one end and calculates both x and y.
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//
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// Programmer: Kenny Hoff
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// Date: 10/25/95
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// Purpose: To implement the Bresenham's line drawing algorithm for all
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// slopes and line directions (using minimal routines).
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//============================================================================
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#include <stdlib.h>
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// EXTERNALLY DEFINED FRAMEBUFFER AND FRAMEBUFFER DIMENSIONS (WIDTH))
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extern unsigned char far* FrameBuffer;
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extern int WIDTH;
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#define SetPixel(x,y,c) FrameBuffer[y*WIDTH+x]=c;
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//============================================================================
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// Fills the intermediate points along a line between the two given endpoints
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// using Bresenham's line drawing algorithm. NOTE: this routine does no clipping
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// so the coordinate values must be within the FrameBuffer bounds.
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// NOTE: USE (Ax,Ay) as the starting point (values that are incremented)
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//============================================================================
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void BresLine(int Ax, int Ay, int Bx, int By, unsigned char Color)
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{
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//------------------------------------------------------------------------
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// INITIALIZE THE COMPONENTS OF THE ALGORITHM THAT ARE NOT AFFECTED BY THE
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// SLOPE OR DIRECTION OF THE LINE
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//------------------------------------------------------------------------
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int dX = abs(Bx-Ax); // store the change in X and Y of the line endpoints
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int dY = abs(By-Ay);
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//------------------------------------------------------------------------
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// DETERMINE "DIRECTIONS" TO INCREMENT X AND Y (REGARDLESS OF DECISION)
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//------------------------------------------------------------------------
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int Xincr, Yincr;
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if (Ax > Bx) { Xincr=-1; } else { Xincr=1; } // which direction in X?
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if (Ay > By) { Yincr=-1; } else { Yincr=1; } // which direction in Y?
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//------------------------------------------------------------------------
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// DETERMINE INDEPENDENT VARIABLE (ONE THAT ALWAYS INCREMENTS BY 1 (OR -1) )
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// AND INITIATE APPROPRIATE LINE DRAWING ROUTINE (BASED ON FIRST OCTANT
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// ALWAYS). THE X AND Y'S MAY BE FLIPPED IF Y IS THE INDEPENDENT VARIABLE.
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//------------------------------------------------------------------------
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if (dX >= dY) // if X is the independent variable
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{
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int dPr = dY<<1; // amount to increment decision if right is chosen (always)
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int dPru = dPr - (d><<1); // amount to increment decision if up is chosen
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int P = dPr - dX; // decision variable start value
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for (; dX>=0; dX--) // process each point in the line one at a time (just use dX)
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{
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SetPixel(Ax, Ay, Color); // plot the pixel
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if (P > 0) // is the pixel going right AND up?
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{
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Ax+=Xincr; // increment independent variable
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Ay+=Yincr; // increment dependent variable
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P+=dPru; // increment decision (for up)
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}
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else // is the pixel just going right?
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{
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Ax+=Xincr; // increment independent variable
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P+=dPr; // increment decision (for right)
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}
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}
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}
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else // if Y is the independent variable
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{
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int dPr = dX<<1; // amount to increment decision if right is chosen (always)
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int dPru = dPr - (d><<1); // amount to increment decision if up is chosen
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int P = dPr - dY; // decision variable start value
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for (; dY>=0; dY--) // process each point in the line one at a time (just use dY)
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{
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SetPixel(Ax, Ay, Color); // plot the pixel
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if (P > 0) // is the pixel going up AND right?
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{
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Ax+=Xincr; // increment dependent variable
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Ay+=Yincr; // increment independent variable
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P+=dPru; // increment decision (for up)
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}
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else // is the pixel just going up?
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{
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Ay+=Yincr; // increment independent variable
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P+=dPr; // increment decision (for right)
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}
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}
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}
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}
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*/ |