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git://projects.qi-hardware.com/ben-scans.git
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ecf993e0f2
- solidify/Makefile, solidify/histo.h, solidify/histo.c: generate a Z histogram and find the median height - solidify/face.c (read_face): set z_ref to the median, not the average - solidify/face.c (read_face): uncompress .bz2 files on the fly - solidify/face.c (read_face): don't close standard input (for style)
40 lines
641 B
C
40 lines
641 B
C
#include "util.h"
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#include "array.h"
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#include "histo.h"
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struct histo *make_histo(struct array *a)
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{
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int i;
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struct histo *h;
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h = alloc_type(struct histo);
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h->n = a->max_z-a->min_z+1;
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h->b = alloc_size(h->n*sizeof(int));
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for (i = 0; i != h->n; i++)
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h->b[i] = 0;
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for (i = 0; i != (a->max_x-a->min_x+1)*(a->max_y-a->min_y+1); i++)
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if (a->data[i] != UNDEF)
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h->b[a->data[i]-a->min_z]++;
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return h;
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}
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void free_histo(struct histo *h)
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{
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free(h);
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}
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int median(const struct histo *h)
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{
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int tot = 0, sum = 0;
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int i;
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for (i = 0; i != h->n; i++)
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tot += h->b[i];
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for (i = 0; sum < tot/2; i++)
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sum += h->b[i];
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return i-1;
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}
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