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build out oct[] and octitions[]

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nick black 2024-12-28 09:19:07 -05:00 committed by nick black
parent 1d0976b0cf
commit f435270222
1 changed files with 27 additions and 1 deletions
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src/lib/blit.c
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@ -1010,11 +1010,37 @@ octant_blit(ncplane* nc, int linesize, const void* data, int leny, int lenx,
// octants, and their indices correspond to sex[].
static const char* oct[128] = {
octtrans[255],
// one set
octtrans[254],
octtrans[253],
octtrans[251],
octrrans[247],
octtrans[239],
octtrans[223],
octtrans[191],
octtrans[127],
// two set (7 + 6 + 5 + 4 + 3 + 2 + 1)
octtrans[252], octtrans[250], octtrans[246], octtrans[238], octtrans[222], octtrans[190], octtrans[126], // 1+2
octtrans[249], octtrans[245], octtrans[237], octtrans[221], octtrans[189], octtrans[125], // 2+3
octtrans[243], octtrans[235], octtrans[219], octtrans[187], octtrans[123], // 3+4
octtrans[231], octtrans[215], octtrans[183], octtrans[119], // 4+5
octtrans[207], octtrans[175], octtrans[111], // 5+6
octtrans[159], octtrans[95], // 6+7
octtrans[63], // 7+8
// FIXME three set
// FIXME four set
};
static const unsigned octitions[] = {
0, // 1 way to arrange 0
1, 2, 4, 8, 16, 32, 64, 128, // 8 ways to arrange 1
// 28 ways for 2 FIXME
// 28 ways for 2
3, 5, 9, 17, 33, 65, 129,
6, 10, 18, 34, 66, 130,
12, 20, 36, 68, 132,
24, 40, 72, 136,
48, 80, 144,
96, 160,
192
// 56 ways for 3 FIXME
// 70 ways for 4, but there are inverses among them FIXME
};