First Commit

1 files changed, 55 insertions, 0 deletions

diff --git a/Random/mandelbrot.c b/Random/mandelbrot.c
new file mode 100644
index 0000000..9f8a796
--- /dev/null
+++ b/Random/mandelbrot.c
@@ -0,0 +1,55 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <complex.h>
+#include <math.h>
+#define ite 500
+
+double map(double x, double p1, double p2, double c1, double c2);
+double mandel(double y, double x);
+
+int main(){
+    const int dimx = 800, dimy = 800;
+    int i, j;
+    FILE *fp = fopen("out.ppm", "wb");
+
+    fprintf(fp, "P6\n%d %d\n255\n", dimx, dimy);
+    int c;
+    unsigned char color[3];
+    unsigned char temp;
+    for(j=-dimy/2; j<dimy/2; ++j){
+        for(i=-dimx/2; i<dimx/2; ++i){
+            temp = (int)mandel(map(j, -dimx/2, dimx/2, -2, 2), map(i, -dimx/2, dimx/2, -2, 2));
+            color[0] = temp;
+            color[1] = temp;
+            color[2] = temp;
+            fwrite(color, 3, 1, fp);        
+        }
+    }
+
+    fclose(fp);
+    return 0;
+}
+
+double mandel(double y, double x){
+    int i;
+    double  ca = x, 
+            cb = y;
+    double zx, zy, tzx, tzy;
+    zx = x;
+    zy = y;
+    for(i=0; i<ite; ++i){
+        tzx = zx;
+        tzy = zy;
+        zx  = tzx*tzx - tzy*tzy + ca;
+        zy  = 2*tzx*tzy + cb;
+        if(zx*zx + zy*zy > 4)
+            break; 
+    }
+
+    return map(i, ite, 0, 0, 255);
+}
+
+
+double map(double x, double p1, double p2, double c1, double c2){
+    return 1.0*(x-p1)*(c2-c1)/(p2-p1) + c1;
+}
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