Merged some nasty programs from softz.harvie.cz

[mirrors/Programs.git] / java / mandelbrot / mandelbrot / mandelbrot.java

diff --git a/java/mandelbrot/mandelbrot/mandelbrot.java b/java/mandelbrot/mandelbrot/mandelbrot.java
new file mode 100755 (executable)
index 0000000..9068562
--- /dev/null
+++ b/java/mandelbrot/mandelbrot/mandelbrot.java
@@ -0,0 +1,126 @@
+/*
+ * Mandelbrot set ASCII visualisation
+ * http://en.wikipedia.org/wiki/Mandelbrot_set
+ * http://www.root.cz/clanky/barvy-pro-shell/
+ * Copylefted by: Harvie 2oo9
+
+
+                                     aa
+                                     aa
+                                     aa
+                                     aa
+                                  aaaccaaa
+                                 aaai  iaaa
+                            aabaab        baabaa
+                             aab            baa
+                            aad              daa
+                             aab            baa
+                            aaaaad        daaaaa
+                         aaacccl            lcccaaa
+                     dbaaab                      baaabd
+                    aab                              baa
+                    aab                              baa
+                aaaaah                                haaaaa
+          ba aaaak   c                                c   kaaaa ab
+            aabc                                            cbaa
+              aacabab                                babacaa
+                    aae         ZEN OF CODING        eaa
+                     aaa                            aaa
+                      ae  n          cc          n  ea
+                      aaa  ab aa afa    afa aa ba  aaa
+
+ */
+
+package mandelbrot;
+import java.math.*;
+
+public class mandelbrot {
+       public String[] chars = " .`-_\':,;^=+/\\\"|)\\<>)iv%xclrs{*}I?!][1taeo7zjLunT#JCwfy325Fp6mqSghVd4EgXPGZbYkOA&8U$@KHDBWNMR0Q".split("");
+       public int max_iteration = 140;
+       public float zoom = 65;
+
+       public double x_from = -2;
+       public double x_to = 2;
+       public double y_from = -2.1;
+       public double y_to = 2.1;
+
+       public boolean color = false;
+       public boolean background = false;
+
+
+       public mandelbrot() {
+               max_iteration = 140;
+       zoom = 65;
+
+               x_from = -2;
+               x_to = 2;
+               y_from = -2.1;
+               y_to = 2.1;
+
+               color = false;
+               background = false;
+       }
+
+       public int get_pixel_value(double x0, double y0) {
+       double x = 0;
+       double y = 0;
+
+       int iteration = 0;
+
+       while( x*x + y*y <= (2*2)  && iteration < max_iteration ) {
+       double xtemp = x*x - y*y + x0;
+       y = 2*x*y + y0;
+       x = xtemp;
+       iteration++;
+       }
+
+       if( iteration >= max_iteration ) {
+                       return 0;
+               }       else {
+                       return iteration;
+               }
+
+       }
+
+       public String get_pixel_character(double x, double y) {
+               float i =  ((float)get_pixel_value(x, y)/(float)max_iteration) * (chars.length-1);
+               chars[0]=" ";
+               return chars[Math.round(i)];
+       }
+
+       public String get_pixel_xterm_color(double x, double y) {
+               int i = Math.round( ((float)get_pixel_value(x, y)/max_iteration)*14 );
+               return "\033["+((int)(i%2))+";"+(30+(int)(i/2))+"m";
+       }
+
+       public String get_pixel_xterm_background(double x, double y) {
+               int i = 40+Math.round( ((float)get_pixel_value(x, y)/max_iteration)*7 );
+               return "\033["+i+"m";
+       }
+
+       public static void cls() {
+               System.out.print("\033[2J");
+       }
+
+       public static void top() {
+               System.out.print("\033[0;0H");
+       }
+
+       public void stat() {
+               System.out.print("ASCII Mandelbrot Set Visualisation (Harvie 2oo9) - Iterations: "+max_iteration+", zoom: "+zoom+"     \n");
+       }
+
+       public void render() {
+               //if(color || background) max_iteration = 14;
+
+               double x, y;
+               for(x=x_from; x<=x_to; x+=5/zoom) { for(y=y_from; y<=y_to; y+=2/zoom) {
+                       if(color) System.out.print(get_pixel_xterm_color(x, y));
+                       if(background) System.out.print(get_pixel_xterm_background(x, y));
+
+                       System.out.print(get_pixel_character(x, y));
+                       //System.out.print(get_pixel_color(x, y)+" ");
+               } System.out.println("\033[0m"); }
+       }
+
+}