File size: 1,554 Bytes
9913017 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 | // colortest.cpp
// create a test image showing the color encoding
static char usage[] = "usage: %s range outimage [size]\n";
# include <stdio.h>
# include <math.h>
#include "imageLib.h"
#include "colorcode.h"
int main(int argc, char **argv)
{
int verbose = 1;
if (argc < 3) {
fprintf(stderr, usage, argv[0]);
exit(1);
}
int optind = 1;
float truerange = atof(argv[optind++]);
char *outname = argv[optind++];
int size = optind < argc ? atoi(argv[optind++]) : 151;
float range = 1.04 * truerange; // make picture a bit bigger to show out-of-range coding
try {
CShape sh(size, size, 3);
CByteImage out(sh);
int s2 = size/2;
for (int y = 0; y < size; y++) {
for (int x = 0; x < size; x++) {
float fx = (float)x / (float)s2 * range - range;
float fy = (float)y / (float)s2 * range - range;
if (x == s2 || y == s2) // make black coordinate axes
continue;
uchar *pix = &out.Pixel(x, y, 0);
//fx = rintf(fx);
//fy = rintf(fy);
computeColor(fx/truerange, fy/truerange, pix);
}
}
int ir = (int)truerange;
int ticksize = size < 120 ? 1 : 2;
for (int k = -ir; k <= ir; k++) {
int ik = (int)(k / range * s2) + s2;
for (int t = -ticksize; t <= ticksize; t++) {
uchar *pix;
pix = &out.Pixel(ik, s2 + t, 0); pix[0] = pix[1] = pix[2] = 0;
pix = &out.Pixel(s2 + t, ik, 0); pix[0] = pix[1] = pix[2] = 0;
}
}
WriteImageVerb(out, outname, verbose);
}
catch (CError &err) {
fprintf(stderr, err.message);
fprintf(stderr, "\n");
exit(1);
}
return 0;
}
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