mandelbrot: only check periodicity once for each period instead of twice.

Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
13 years ago · 1d06608732
parent 2fee131b9e
commit 1d06608732
1 changed files with 1 additions and 1 deletions
--- a/libavfilter/vsrc_mandelbrot.c
+++ b/libavfilter/vsrc_mandelbrot.c
@ -194,7 +194,7 @@ static void draw_mandelbrot(AVFilterContext *ctx, uint32_t *color, int linesize,
                zi= 2*zr*zi + ci;
                zr=       t + cr;
                if(use_zyklus){
-                    if(i && mb->zyklus[i>>1][0]==zr && mb->zyklus[i>>1][1]==zi)
+                    if((i&1) && mb->zyklus[i>>1][0]==zr && mb->zyklus[i>>1][1]==zi)
                        break;
                    mb->zyklus[i][0]= zr;
                    mb->zyklus[i][1]= zi;