1 files changed, 76 insertions, 0 deletions
diff --git a/Examples/GIFPlot/Java/shadow/runme.java b/Examples/GIFPlot/Java/shadow/runme.java
new file mode 100644
index 0000000..91db038
--- /dev/null
+++ b/Examples/GIFPlot/Java/shadow/runme.java
@@ -0,0 +1,76 @@
+// Plot a 3D function
+
+import java.lang.Math;
+
+public class runme {
+
+  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));
+  }
+}