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Temporarily undo photon reflection fix (causes inaccuracies).

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jacksonmj 2011-01-15 15:36:42 +00:00
parent 42d7b56602
commit c7213127e5
1 changed files with 23 additions and 24 deletions
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47
src/powder.c
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@ -261,31 +261,30 @@ int try_move(int i, int x, int y, int nx, int ny)
static unsigned direction_to_map(float dx, float dy, int t)
{
// TODO:
// adding extra directions causes some inaccuracies
// not adding them causes problems with some diagonal surfaces
// solution may involve more intelligent setting of initial i0 value in find_next_boundary?
// Adding extra directions causes some inaccuracies.
// Not adding them causes problems with some diagonal surfaces (photons absorbed instead of reflected).
// For now, don't add them.
// Solution may involve more intelligent setting of initial i0 value in find_next_boundary?
// or rewriting normal/boundary finding code
if (t & REFRACT) {
// extra directions cause noticeable inaccuracy for refraction (potentially breaking existing saves), so don't add them here
return (dx >= 0) |
(((dx + dy) >= 0) << 1) | /* 567 */
((dy >= 0) << 2) | /* 4+0 */
(((dy - dx) >= 0) << 3) | /* 321 */
((dx <= 0) << 4) |
(((dx + dy) <= 0) << 5) |
((dy <= 0) << 6) |
(((dy - dx) <= 0) << 7);
} else {
// TODO: reflection still not perfect. See TODO note above.
return (dx >= -0.001) |
(((dx + dy) >= -0.001) << 1) | /* 567 */
((dy >= -0.001) << 2) | /* 4+0 */
(((dy - dx) >= -0.001) << 3) | /* 321 */
((dx <= 0.001) << 4) |
(((dx + dy) <= 0.001) << 5) |
((dy <= 0.001) << 6) |
(((dy - dx) <= 0.001) << 7);
}
return (dx >= 0) |
(((dx + dy) >= 0) << 1) | /* 567 */
((dy >= 0) << 2) | /* 4+0 */
(((dy - dx) >= 0) << 3) | /* 321 */
((dx <= 0) << 4) |
(((dx + dy) <= 0) << 5) |
((dy <= 0) << 6) |
(((dy - dx) <= 0) << 7);
/*
return (dx >= -0.001) |
(((dx + dy) >= -0.001) << 1) | // 567
((dy >= -0.001) << 2) | // 4+0
(((dy - dx) >= -0.001) << 3) | // 321
((dx <= 0.001) << 4) |
(((dx + dy) <= 0.001) << 5) |
((dy <= 0.001) << 6) |
(((dy - dx) <= 0.001) << 7);
}*/
}
static int is_blocking(int t, int x, int y)