/tags/Root-branch-php-utl/SWIG/Examples/GIFPlot/Java/shadow/main.java
Java | 76 lines | 61 code | 11 blank | 4 comment | 4 complexity | ee3e94b98307a155e96e2e194a758881 MD5 | raw file
Possible License(s): LGPL-2.1, Cube, GPL-3.0, 0BSD, GPL-2.0
- // Plot a 3D function
- import java.lang.Math;
- public class main {
- static {
- try {
- System.loadLibrary("gifplot");
- } catch (UnsatisfiedLinkError e) {
- 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);
- System.exit(1);
- }
- }
- public static void main(String argv[]) {
-
- // Here are some plotting parameters
- double xmin = -5.0;
- double xmax = 5.0;
- double ymin = -5.0;
- double ymax = 5.0;
- double zmin = -5.0;
- double zmax = 5.0;
-
- // Grid resolution
- int nxpoints = 60;
- int nypoints = 60;
-
- ColorMap cmap = new ColorMap("cmap");
- FrameBuffer frame = new FrameBuffer(500,500);
- frame.clear((short)gifplot.BLACK);
-
- Plot3D p3 = new Plot3D(frame,xmin,ymin,zmin,xmax,ymax,zmax);
- p3.lookat(2*(zmax-zmin));
- p3.autoperspective(40);
- p3.rotu(60);
- p3.rotr(30);
- p3.rotd(10);
-
- System.out.println( "Making a nice 3D plot..." );
- p3.clear((short)gifplot.BLACK);
- p3.start();
- double dx = 1.0*(xmax-xmin)/nxpoints;
- double dy = 1.0*(ymax-ymin)/nypoints;
- double cscale = 240.0/(zmax-zmin);
- double x = xmin;
- for (int i = 0; i < nxpoints; i++) {
- double y = ymin;
- for (int j = 0; j < nypoints; j++) {
- double z1 = func(x,y);
- double z2 = func(x+dx,y);
- double z3 = func(x+dx,y+dy);
- double z4 = func(x,y+dy);
- double c1 = cscale*(z1-zmin);
- double c2 = cscale*(z2-zmin);
- double c3 = cscale*(z3-zmin);
- double c4 = cscale*(z4-zmin);
- double c = (c1+c2+c3+c4)/4;
- if (c < 0) c = 0;
- if (c > 239) c = 239;
- p3.solidquad(x,y,z1,x+dx,y,z2,x+dx,y+dy,z3,x,y+dy,z4,(short)(c+16));
- y = y + dy;
- }
- x = x + dx;
- }
- frame.writeGIF(cmap,"image.gif");
- System.out.println( "Wrote image.gif" );
- }
- // Here is the function to plot
- public static double func(double x, double y) {
- 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));
- }
- }