diff options
| author | Michael Niedermayer <michaelni@gmx.at> | 2011-11-13 19:28:24 +0100 |
|---|---|---|
| committer | Michael Niedermayer <michaelni@gmx.at> | 2011-11-13 19:28:24 +0100 |
| commit | 08dadd331f171800424c862acc1ed86180d41a4c (patch) | |
| tree | b5547a83be5e3434ec16d49532a42179098ffb23 /libavfilter | |
| parent | e8499ab171055c7ddc16f0032517aeb686639f9a (diff) | |
mandelbrot: allow visualizing the period of converged points.
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
Diffstat (limited to 'libavfilter')
| -rw-r--r-- | libavfilter/vsrc_mandelbrot.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/libavfilter/vsrc_mandelbrot.c b/libavfilter/vsrc_mandelbrot.c index 59a0345806..cab372db5e 100644 --- a/libavfilter/vsrc_mandelbrot.c +++ b/libavfilter/vsrc_mandelbrot.c @@ -39,6 +39,7 @@ enum Outer{ enum Inner{ BLACK, + PERIOD, }; typedef struct Point { @@ -185,7 +186,7 @@ static void draw_mandelbrot(AVFilterContext *ctx, uint32_t *color, int linesize, if(color[x + y*linesize] & 0xFF000000) continue; - use_zyklus= (x==0 || color[x-1 + y*linesize] == 0xFF000000); + use_zyklus= (x==0 || mb->inner!=BLACK ||color[x-1 + y*linesize] == 0xFF000000); for(i=0; i<mb->maxiter; i++){ double t; @@ -213,6 +214,16 @@ static void draw_mandelbrot(AVFilterContext *ctx, uint32_t *color, int linesize, mb->zyklus[i][1]= zi; } } + if(!c && mb->inner==PERIOD){ + int j; + for(j=i-1; j; j--) + if(SQR(mb->zyklus[j][0]-zr) + SQR(mb->zyklus[j][1]-zi) < 0.0000000000000001) + break; + if(j){ + c= i-j; + c= ((c<<5)&0xE0) + ((c<<16)&0xE000) + ((c<<27)&0xE00000); + } + } c |= 0xFF000000; color[x + y*linesize]= c; if(next_cidx < mb->cache_allocated){ |