new pattern (mircol_1) in mkfimg

funcs/misc-plots.c

@@ -86,6 +86,24 @@ for (y=1; y<fimg->height; y++) {
 return 0;
 }
 /* --------------------------------------------------------------------- */
+int fimg_mircol_1(FloatImg *dst, float mval)
+{
+int		x, y;
+float		fx, fy, rgb[3];
+
+for (y=0; y<dst->height; y++) {
+	fy = (float)y / (float)dst->height;
+	for (x=0; x<dst->width; x++) {
+		fx = (float)x / (float)dst->width;
+		rgb[0] = mval * fx;
+		rgb[1] = mval * ((fx+fy)/2.0);
+		rgb[2] = mval * fy;
+		fimg_put_rgb(dst, x, y, rgb);
+		}
+	}
+return -1;
+}
+/* --------------------------------------------------------------------- */
 int fimg_multirandom(FloatImg *fimg, long nbpass)
 {
 int	foo, x, y;