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| author | Neil Moore <neil@s-z.org> | 2014-06-15 01:45:05 -0400 |
|---|---|---|
| committer | Neil Moore <neil@s-z.org> | 2014-06-15 01:50:59 -0400 |
| commit | df1f371a6ddd6e0c5a26a34d431ba7161af991a0 (patch) | |
| tree | 6911becc16ee172864f96ebac5735b2a1c854075 /crawl-ref/source/geom2d.cc | |
| parent | 546f9a454f9155ca3d1ecff5c11fc6d7b27c91fc (diff) | |
| download | crawl-ref-df1f371a6ddd6e0c5a26a34d431ba7161af991a0.tar.gz crawl-ref-df1f371a6ddd6e0c5a26a34d431ba7161af991a0.zip | |
Round more vigorously in ray code.
Aiming cloud cone from (40,41) or (66,23) would crash because of rounding
errors. See for example:
http://dobrazupa.org/morgue/Rikonman/crash-Rikonman-20140425-000700.txt
Now consider numbers as large as 5e-5 to be zero, rather than requiring
1e-7 (for geom2d code) or 1e-5 (ray_def code). This means rays will be
snapped to the diamond grid more frequently, helping to avoid
inconsistencies among different ways of deciding what part of the cell a
ray falls on.
Someone with numerical analysis experience should really look at this
code.
Diffstat (limited to 'crawl-ref/source/geom2d.cc')
| -rw-r--r-- | crawl-ref/source/geom2d.cc | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/crawl-ref/source/geom2d.cc b/crawl-ref/source/geom2d.cc index 74a79342c5..a12e9d90a6 100644 --- a/crawl-ref/source/geom2d.cc +++ b/crawl-ref/source/geom2d.cc @@ -13,7 +13,7 @@ namespace geom static bool double_is_zero(double d) { - return abs(d) < 0.0000001; + return abs(d) < 0.00005; } // Is v parallel to the kernel of f? |