Use of zero-sized plane causes the window size calculation to change
depending on which plane is displayed. Instead use an empty plane so
that largest of the planes is taken into account for sizing.
It now follows very simple rules:
0 - Fatal, user should know about this
1 - Error, but we are recovering
2 - Warning, wrong but okay if you don't know
3 - Info, information you might care about
4 -
5 - Debug #1 - High level debug messages
6 - Debug #2 - Low level debug messages
7 - Trace information
This opens up the true power of the TGP terrain generator, as it
is no longer constrainted by an arbitrary low map height limit,
especially for extreme terrain types.
In other words: on a 1kx1k map with "Alpinist" terrain type, the
map is now really hilly with default settings.
People can still manually limit the map height if they so wish,
and after the terrain generation the limit is stored in the
savegame as if the user set it.
Cheats still allow you to change this value.
This better reflects what it is, and hopefully removes a bit of
the confusion people are having what this setting actually does.
Additionally, update the text on the setting to better inform
users what it is doing exactly, so they can make an educated
decision on how to change it.
Next commit will introduce an "auto" value, which should be the
new default. The rename has as added benefit that everyone will
start out on the "auto" value.
This setting influence the max heightlevel, and not as the name
suggests: the height of the generated map.
How ever you slice it, it is a very weird place to add this
setting, and it is better off being only in the settings menu.
Commits following this commit also make it more useful, so users
no longer have to care about it.
This is an indication value; the game tries to get as close as it
can, but due to the complex tropic rules, that is unlikely to be
exact.
In the end, it picks a height-level to base the desert/tropic
line on. This is strictly seen not needed, as we can convert any
tile to either. But it is the simplest way to get started with
this without redoing all related functions.
Setting the snow coverage (in % of the map) makes a lot more sense
to the human, while still allowing the niche player to set (by
finding the correct %) a snow line height they like. This makes for
easier defaults, as it decoupled terrain height from amount of snow.
Maps can never be 100% snow, as we do not have sprites for coastal
tiles.
Internally, this calculates the best snow line height to approach
this coverage as close as possible.
This used to work by accident: originally the code checked if
GenerateWorld was threaded. If not, it would abort the function.
This worked for placing trees, because it was also returning false
when it was not active.
With the recent changes, that check got removed, and this crash
started to happen. So now check if we have a modal window, which
is a very solid indication we are generating the world.
Basically, modal windows had their own thread-locking for what
drawing was possible. This is a bit nonsense now we have a
game-thread. And it makes much more sense to do things like
NewGRFScan and GenerateWorld in the game-thread, and not in a
thread next to the game-thread.
This commit changes that: it removes the threads for NewGRFScan
and GenerateWorld, and just runs the code in the game-thread.
On regular intervals it allows the draw-thread to do a tick,
which gives a much smoother look and feel.
It does slow down NewGRFScan and GenerateWorld ever so slightly
as it spends more time on drawing. But the slowdown is not
measureable on my machines (with 700+ NewGRFs / 4kx4k map and
a Debug build).
Running without a game-thread means NewGRFScan and GenerateWorld
are now blocking.
For some reason I only converted one of the two modal windows we
have, and completely forgot the other.
While at it, synchronize the way those two modal windows work
in terms of "next_update".
DropDownListItem are strongly managed using std::unique_ptr to ensure leak-free handling. Appropriate use
of move-semantics make intent a lot clearer than parameter comments and allows the compiler to generate
copy-free code for most situations.
A conforming compiler with a valid <mutex>-header is expected.
Most parts of the code assume that locking a mutex will never fail unexpectedly,
which is generally true on all common platforms that don't just pretend to
be C++11. The use of condition variables in driver code is checked.
Artin Alavi