/***********************************************
*	Mandzoom3.c
*
*  Generates a RAW format file of an image 
*  of Mandelbrot set (grayscale)
*
*  C source file by Alberto Strumia
*
************************************************/


#include<stdio.h>

/* definition of constants */

#define Radius 10
#define Cx 0.1620
#define Cy -1.035
#define Side 0.025
#define M 700
#define Num 1024
/* Alternative values Cx 0.1747, 0.1747 Cy -1.072,-1.072 Side 0.0015, 0.00015 Num 1024 */

/* main program */
main()
{

	int p, q, n, w;
	double x, y, xx, yy, Incx, Incy;

	FILE *fp;
	fp = fopen("Mand.raw","w");
		
	
	for (p = 1; p <= M; p++)
	{
		Incy = Cy - Side + 2*Side/M*p;
		
			printf("%i %%\n", p*100/M);

		
		for (q = 1; q <= M; q++)
		{
			Incx = Cx - Side + 2*Side/M*q;
			
		x = 0;
		y = 0;
		w = 200;

			
			for ( n = 1; n <= Num; ++n)
			{
				xx = x*x - y*y - Incx;
				yy = 2*x*y - Incy;
				
				x = xx;
				y = yy;
				
				if ( x*x + y*y > Radius )
					{
						w = n;
						n = Num;
					}
			}
		fprintf(fp, "%c", w/4 );

		}
	}
	
	fclose(fp);
}

/* end of main program */