//---------------------------------------------------------------------------// // $Id: x01.java,v 1.21 2004/06/17 12:41:02 andrewross Exp $ //---------------------------------------------------------------------------// //---------------------------------------------------------------------------// // Copyright (C) 2001 Geoffrey Furnish // Copyright (C) 2001, 2002 Alan W. Irwin // Copyright (C) 2004 Andrew Ross // // // This file is part of PLplot. // // PLplot is free software; you can redistribute it and/or modify // it under the terms of the GNU Library General Public License as published by // the Free Software Foundation; version 2 of the License. // // PLplot 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 Library General Public License for more details. // // You should have received a copy of the GNU Library General Public License // along with PLplot; if not, write to the Free Software // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA //---------------------------------------------------------------------------// //---------------------------------------------------------------------------// // Implementation of PLplot example 1 in Java. //---------------------------------------------------------------------------// package plplot.examples; import plplot.core.*; import java.lang.Math; class x01 { double xscale, yscale, xoff, yoff; PLStreamc plsdummy = new PLStreamc(); plplotjavac pls = new plplotjavac(); public static void main( String[] args ) { x01 x = new x01( args ); } public x01( String[] args ) { // plplot initialization // Divide page into 2x2 plots unless user overrides. pls.plssub(2, 2); // Parse and process command line arguments. // plMergeOpts(options, "x01c options", notes); pls.plParseOpts( args, pls.PL_PARSE_FULL|pls.PL_PARSE_NOPROGRAM ); // Print out version number. StringBuffer version = new StringBuffer(80); // plgver no longer works for unexplained reasons. pls.plgver(version); System.out.println("PLplot library version: " + version); // Initialize PLplot. pls.plinit(); // Select the multi-stroke font. pls.plfontld( 1 ); // Set up the data // Original case xscale = 6.; yscale = 1.; xoff = 0.; yoff = 0.; // Do a plot plot1(0); // Set up the data xscale = 1.; yscale = 0.0014; yoff = 0.0185; // Do a plot int digmax = 5; pls.plsyax(digmax, 0); plot1(1); plot2(); plot3(); // Let's get some user input // if (locate_mode) { // for (;;) { // if (! plGetCursor(&gin)) break; // if (gin.keysym == PLK_Escape) break; // pltext(); // if (gin.keysym < 0xFF && isprint(gin.keysym)) // printf("wx = %f, wy = %f, dx = %f, dy = %f, c = '%c'\n", // gin.wX, gin.wY, gin.dX, gin.dY, gin.keysym); // else // printf("wx = %f, wy = %f, dx = %f, dy = %f, c = 0x%02x\n", // gin.wX, gin.wY, gin.dX, gin.dY, gin.keysym); // plgra(); // } // } // Don't forget to call plend() to finish off! pls.plend(); } void plot1( int do_test ) { int i; double xmin, xmax, ymin, ymax; double x[] = new double[60]; double y[] = new double[60]; double xs[] = new double[6]; double ys[] = new double[6]; for( i=0; i < 60; i++ ) { x[i] = xoff + xscale * (i + 1) / 60.0; y[i] = yoff + yscale * Math.pow(x[i], 2.); } xmin = x[0]; xmax = x[59]; ymin = y[0]; ymax = y[59]; for( i=0; i < 6; i++ ) { xs[i] = x[i * 10 + 3]; ys[i] = y[i * 10 + 3]; } // Set up the viewport and window using PLENV. The range in X is 0.0 to // 6.0, and the range in Y is 0.0 to 30.0. The axes are scaled separately // (just = 0), and we just draw a labelled box (axis = 0). pls.plcol0(1); pls.plenv( xmin, xmax, ymin, ymax, 0, 0 ); pls.plcol0(2); pls.pllab( "(x)", "(y)", "#frPLplot Example 1 - y=x#u2" ); // Plot the data points. pls.plcol0(4); pls.plpoin( xs, ys, 9 ); // Draw the line through the data. pls.plcol0(3); pls.plline(x, y); } void plot2() { int i; double x[] = new double[100]; double y[] = new double[100]; // Set up the viewport and window using PLENV. The range in X is -2.0 to // 10.0, and the range in Y is -0.4 to 2.0. The axes are scaled // separately (just = 0), and we draw a box with axes (axis = 1). pls.plcol0(1); pls.plenv(-2.0, 10.0, -0.4, 1.2, 0, 1); pls.plcol0(2); pls.pllab("(x)", "sin(x)/x", "#frPLplot Example 1 - Sinc Function"); // Fill up the arrays. for (i = 0; i < 100; i++) { x[i] = (i - 19.0) / 6.0; y[i] = 1.0; if (x[i] != 0.0) y[i] = Math.sin(x[i]) / x[i]; } // Draw the line. pls.plcol0(3); pls.plwid(2); pls.plline(x, y); pls.plwid(1); } void plot3() { int i; int space0[] = {}; int mark0[] = {}; int space1[] = {1500}; int mark1[] = {1500}; double x[] = new double[101]; double y[] = new double[101]; // For the final graph we wish to override the default tick intervals, // and so do not use plenv(). pls.pladv(0); // Use standard viewport, and define X range from 0 to 360 degrees, Y // range from -1.2 to 1.2. pls.plvsta(); pls.plwind( 0.0, 360.0, -1.2, 1.2 ); // Draw a box with ticks spaced 60 degrees apart in X, and 0.2 in Y. pls.plcol0(1); pls.plbox("bcnst", 60.0, 2, "bcnstv", 0.2, 2); // Superimpose a dashed line grid, with 1.5 mm marks and spaces. // plstyl expects a pointer! pls.plstyl(mark1, space1); pls.plcol0(2); pls.plbox("g", 30.0, 0, "g", 0.2, 0); pls.plstyl(mark0, space0); pls.plcol0(3); pls.pllab( "Angle (degrees)", "sine", "#frPLplot Example 1 - Sine function" ); for (i = 0; i < 101; i++) { x[i] = 3.6 * i; y[i] = Math.sin(x[i] * Math.PI / 180.0); } pls.plcol0(4); pls.plline(x, y); } } //---------------------------------------------------------------------------// // End of x01.java //---------------------------------------------------------------------------//