first shoot

funcs/misc-plots.c

@@ -0,0 +1,57 @@
+/*
+	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*(cos(fy*K)+1.2),
+			M*(cos(fx*fy)+1.2));
+		}
+	}
+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;
+}
+/* --------------------------------------------------------------------- */