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.cc, moving its contents into the new stepdown.cc and strings.cc.
(The latter also got many donations from libutil.h.)
Down with stuff! Up the new flesh!
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There were two functions: one used no cache and ignored clouds, another one
has a cache and accepts different LOS models.
I added a new cached model: LOS_SOLID (using opc_solid). All but one uses
of opc_fullyopaque (two-argument cell_see_cell()) were bugs to me, so they
were moved to a different model.
This makes Refrigeration not work through glass walls anymore (it still
works though clouds).
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"File:" is shown in your editor's status bar.
"Written by:" was used only for the first person who changed a file. We got
git for that now, and pre-DCSS history is so woefully inaccurate it doesn't
really matter.
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Also extract unwind_var template to unwind.h. The latter is now
included from AppHdr.h, though it needn't really be.
This means it's now possible to use coord_def in libutil.h.
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Also add a few previously indirect includes.
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There's a conflict between you.see_cell_no_trans and
los.find_ray with default argument opc_solid. As a quick fix,
make los.find_ray use opc_no_trans, but this doesn't increase
the general usefulness of los.find_ray...
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Disabling the LOS lua bindings while ray.h changes.
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New: colour.cc, coord.cc, coordit.cc, random.cc, rng.cc.
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cluautil.cc should eventually contain all of the functions
for passing objects from and to lua, at least the shared
ones.
Also cut down on clua.cc include list.
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To avoid name clashes, rename dlua libs from *_lib to *_dlib.
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Move lua library headers to separate l_libs.h, fixing another
compilation error...
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During precomputation, we store the minimal cellrays by target
and sort them according to niceness.
find_ray now simply picks the first non-blocked ray to a
target, which means looping through the 10 or so minimal
cellrays with that target -- this should be a lot more
efficient. (An extended findray test went from 150s to 40s
(debug) and 40s to 26s (profile)).
The interface to find_ray has changed: cycle_dir=-1,0,1 was
changed to cyle=false/true since we never cycle in the other
direction anyway. find_shortest was removed: all rays to a
target had the same length all along, but now we also return
the straightest one automatically.
The change also eliminates the duplicate corner-cutting code
between ray_def::advance and find_ray as imbalance calculation
now relies on ray_def::advance.
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There is now a separate fallback_ray() that needs to be called
explicitly. I've manually converted uses of find_ray with
allow_fallback == true.
find_ray with allow_fallback set always returned true, yet there
were a number of places that used the return value, in particular
in directn.cc. I'll check these later.
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This was caused by an incorrectly inverted test.
Also update the find_ray binding so the findray test would have
found the bug.
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Now only targets cells that are not blocked by transparent walls
etc. find_ray can't currently check for real visibility.
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Extra file to keep luadgn.cc from growing even larger.
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