FloatImg/funcs/misc-plots.c

/*
	testing some random funcs.

*/

#include  <stdio.h>
#include  <stdlib.h>
#include  <math.h>

#include  "../floatimg.h"

/* --------------------------------------------------------------------- */

int fimg_draw_something(FloatImg *fimg)
{
int	x, y;
float 	fx, fy;

#define K (3.14159*13.456)
#define M 100.0

for (x=0; x<fimg->width; x++) {
	fimg_plot_rgb(fimg, x, 0,
		(float)x,
		(float)x + 5.678,
		(float)x * 1.33333);
	}

for (y=1; y<fimg->height; y++) {
	fy = (float)y / (float)fimg->height;
	for (x=0; x<fimg->width; x++) {
		fx = (float)x / (float)fimg->width;
		fimg_plot_rgb(fimg, x, y,
			M*(cos(fx*K)+1.2),
			M*(sin(fy*K)+1.4),
			M*(cos(fx*fy)+1.6));
		}
	}
return 0;
}
/* --------------------------------------------------------------------- */
int fimg_multirandom(FloatImg *fimg)
{
int	foo, x, y;

#define RI ( (rand()/7) + (rand()/9) )
#define RD ( (drand48()/7) + (drand48()/7) )

for (foo=0; foo<100000000; foo++)
	{
	x = RI % fimg->width;
	y = RI % fimg->height;
	fimg_add_rgb(fimg, x, y, RD, RD, RD);
	}
return 0;
}
/* --------------------------------------------------------------------- */