/tags/ttn-post-libtool-1-4-3-upgrade/SWIG/Examples/GIFPlot/Java/full/main.java

 1// Plot a 3D function
 2import java.lang.Math;
 3
 4public class main {
 5
 6  static {
 7    try {
 8        System.loadLibrary("gifplot");
 9    } catch (UnsatisfiedLinkError e) {
10      System.err.println("Native code library failed to load. See the chapter on Dynamic Linking Problems in the SWIG Java documentation for help.\n" + e);
11      System.exit(1);
12    }
13  }
14
15  public static void main(String argv[]) {
16    
17    // Here are some plotting parameters
18    double xmin = -5.0;
19    double xmax =  5.0;
20    double ymin = -5.0;
21    double ymax =  5.0;
22    double zmin = -5.0;
23    double zmax =  5.0;
24    
25    // Grid resolution
26    int nxpoints =  60;
27    int nypoints =  60;
28    
29    SWIGTYPE_p_ColorMap cmap  = gifplot.new_ColorMap("cmap");
30    SWIGTYPE_p_FrameBuffer frame = gifplot.new_FrameBuffer(500,500);
31    gifplot.FrameBuffer_clear(frame,(short)gifplot.BLACK);
32    
33    SWIGTYPE_p_Plot3D p3    = gifplot.new_Plot3D(frame,xmin,ymin,zmin,xmax,ymax,zmax);
34    gifplot.Plot3D_lookat(p3,2*(zmax-zmin));
35    gifplot.Plot3D_autoperspective(p3,40);
36    gifplot.Plot3D_rotu(p3,60);
37    gifplot.Plot3D_rotr(p3,30);
38    gifplot.Plot3D_rotd(p3,10);
39    
40    System.out.println( "Making a nice 3D plot..." );
41    gifplot.Plot3D_clear(p3,(short)gifplot.BLACK);
42    gifplot.Plot3D_start(p3);
43    double dx = 1.0*(xmax-xmin)/nxpoints;
44    double dy = 1.0*(ymax-ymin)/nypoints;
45    double cscale = 240.0/(zmax-zmin);
46    double x = xmin;
47    for (int i = 0; i < nxpoints; i++) {
48      double y = ymin;
49      for (int j = 0; j < nypoints; j++) {
50        double z1 = func(x,y);
51        double z2 = func(x+dx,y);
52        double z3 = func(x+dx,y+dy);
53        double z4 = func(x,y+dy);
54        double c1 = cscale*(z1-zmin);
55        double c2 = cscale*(z2-zmin);
56        double c3 = cscale*(z3-zmin);
57        double c4 = cscale*(z4-zmin);
58        double c = (c1+c2+c3+c4)/4;
59        if (c < 0) c = 0;
60        if (c > 239) c = 239;
61        gifplot.Plot3D_solidquad(p3,x,y,z1,x+dx,y,z2,x+dx,y+dy,z3,x,y+dy,z4,(short)(c+16));
62        y = y + dy;
63      }
64      x = x + dx;
65    }
66
67    gifplot.FrameBuffer_writeGIF(frame,cmap,"image.gif");
68    System.out.println( "Wrote image.gif" );
69  } 
70
71  // Here is the function to plot
72  public static double func(double x, double y) {
73    return 5*java.lang.Math.cos(2*java.lang.Math.sqrt(x*x+y*y))*java.lang.Math.exp(-0.3*java.lang.Math.sqrt(x*x+y*y));
74  }
75}