diff options
| -rw-r--r-- | libavfilter/vsrc_mandelbrot.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/libavfilter/vsrc_mandelbrot.c b/libavfilter/vsrc_mandelbrot.c index 8f3a0d26ab..402ac51ac8 100644 --- a/libavfilter/vsrc_mandelbrot.c +++ b/libavfilter/vsrc_mandelbrot.c @@ -44,6 +44,7 @@ enum Inner{ BLACK, PERIOD, CONVTIME, + MINCOL, }; typedef struct Point { @@ -96,6 +97,7 @@ static const AVOption mandelbrot_options[] = { {"black", "set black mode", 0, AV_OPT_TYPE_CONST, {.dbl=BLACK}, INT_MIN, INT_MAX, 0, "inner" }, {"period", "set period mode", 0, AV_OPT_TYPE_CONST, {.dbl=PERIOD}, INT_MIN, INT_MAX, 0, "inner" }, {"convergence", "show time until convergence", 0, AV_OPT_TYPE_CONST, {.dbl=CONVTIME}, INT_MIN, INT_MAX, 0, "inner" }, + {"mincol", "color based on point closest to the origin of the cycle", 0, AV_OPT_TYPE_CONST, {.dbl=MINCOL}, INT_MIN, INT_MAX, 0, "inner" }, {NULL}, }; @@ -266,6 +268,17 @@ static void draw_mandelbrot(AVFilterContext *ctx, uint32_t *color, int linesize, } }else if(mb->inner==CONVTIME){ c= (i*255/mb->maxiter)*0x010101; + } else if(mb->inner==MINCOL){ + int j; + double closest=9999; + int closest_index=0; + for(j=i-1; j; j--) + if(SQR(mb->zyklus[j][0]) + SQR(mb->zyklus[j][1]) < closest){ + closest= SQR(mb->zyklus[j][0]) + SQR(mb->zyklus[j][1]); + closest_index= j; + } + closest = sqrt(closest); + c= lrintf((mb->zyklus[closest_index][0]/closest+1)*127) + lrintf((mb->zyklus[closest_index][1]/closest+1)*127)*256; } } c |= 0xFF000000; |