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Markus Armbruster ea5c8a6598 power: Saner power for items, ships, planes and land units
Items, ships, planes and land units all contribute to the power
factor, which determines position on the power chart.

Items are worth

    amount * item value * (0.5 + nation tech level / 1000.0)

The item values aren't quite right: producing stuff can *hurt* your
position on the power chart.  Food, uw and rads are worth nothng.

Reduce the value of oil, and give rads the same value as oil.  Tweak
value of iron and oil products so that production's power change is
roughly zero around p.e. 0.9 (tech 110), except for construction
materials, where it's zero at p.e. 0.5 (tech 0).  Construction
materials become less valuable, shells, guns and petrol become more
valuable.  Increase value of bars to roughly match the other changes.
It may still be too low.  Halve the value of civilians, and give the
other half to uw.  Results:

            old     new     change
    civ      100     50   / 2
    mil      100    100
    shell     80    125   * 1.5625
    gun      400    950   * 2.375
    pet        2      7   * 3.5
    iron      10     10
    dust     200    200
    bar     1000   2500   * 2.5
    food       0      0
    oil      100     50   / 2
    lcm      100     20   / 5
    hcm      200     40   / 5
    uw         0     50   new
    rad        0     50   new

Ships, planes and land units are worth

    base value * effic/100.0 * (0.5 + unit tech level / 1000.0)

For ships and land units, the base value is

    lcm/5.0 + hcm/5.0

Build cost is ignored, but lcms are valued twice as much "loose" ones
(before this commit).  Therefore, building stuff can change your
position on the power chart in both directions, depending on the type
of build.

For planes, the base value is

    20 * (0.5 + nation tech level / 1000.0)

Build cost and materials are ignored, and tech is squared.  This
is plainly absurd.

Unify to

    (power value of money and materials to build) * effic/100.0

This formula is chosen so that building stuff doesn't change your
power factor.  Bonus: it doesn't assume anything about possible build
materials.

For ships and land units, factoring in build cost overcompensates the
discounted value of construction materials more often than not.

Noteworthy changes for the stock game:

    ship type          old     new    change
    ss   slave ship     20     5.8    * 0.29    largest decrease
    cs   cargo ship     20     7.8    * 0.39
    ts   trade ship     60    25.5    * 0.42
    frg  frigate        12     7.8    * 0.65
    bb   battleship     24    21.8    * 0.91
    cal  light carrier  22    30.4    * 1.38
    can  nuc carrier    30    84.6    * 2.82    largest increase

    land unit type     old     new    change
    hat  hvy artillery  12     9.6    * 0.8     largest decrease
    linf light infantry  2.4   3.32   * 1.38
    cav  cavalry         3     5.4    * 1.8
    inf  infantry        3     5.4    * 1.8
    lar  lt armor        3     6.4    * 2.13
    com  commando        3    15.4    * 5.13
    eng  engineer        3    30.4    * 10.13
    meng mech engineer   3    45.4    * 15.13   largest increase

For planes, the power value change depends on the type.  Below a
certain nation tech level, planes of this type become more valuable,
above less.

For the stock game, planes costing at most $1000 become less valuable
at any nation tech level that can build them, and planes costing at
least $1800 become more valuable at any practical tech level,
i.e. under 400.  Noteworthy planes:

    plane type                 new
    sam  Sea Sparrow           2.1              least valuable
    f2   P-51 Mustang          4.34
    lb   TBD-1 Devastator      5.92
    jf1  F-4 Phantom          10.6
    tr   C-56 Lodestar        10.78
    jt   C-141 Starlifter     15.86
    jhb  B-52 Strato-Fortress 33.54
    ss   KH-7 spysat          41.2              most valuable

The old value is a flat 12 at nation tech level 100, 15 at tech level
250, and 18 at tech level 400.

Signed-off-by: Markus Armbruster <armbru@pond.sub.org>
2017-08-06 19:59:55 +02:00
build-aux build-aux: Refresh from automake 1.13 2015-03-07 10:44:21 +01:00
doc doc/contributing: Fix git format-patch topic branch example 2015-12-13 10:46:58 +01:00
include power: Make item power value configurable 2017-08-06 19:59:45 +02:00
info power: Saner power for items, ships, planes and land units 2017-08-06 19:59:55 +02:00
m4 configure: Use -fstack-protector-strong when available 2015-12-05 13:19:38 +01:00
man man/empire: Trim unwanted space in synopsis 2015-12-13 10:46:58 +01:00
scripts Update copyright notice 2017-07-02 17:45:44 +02:00
src power: Saner power for items, ships, planes and land units 2017-08-06 19:59:55 +02:00
tests power: Saner power for items, ships, planes and land units 2017-08-06 19:59:55 +02:00
.gitignore .gitignore: Ignore sandbox 2014-01-19 08:18:38 +01:00
.travis.yml travis: Enable OS X 2015-12-05 13:19:39 +01:00
bootstrap Replace other occurences of git-FOO by git FOO 2008-12-03 07:57:14 -05:00
configure.ac Update copyright notice 2017-07-02 17:45:44 +02:00
COPYING License upgrade to GPL version 3 or later 2011-04-12 21:20:58 +02:00
CREDITS Put URIs and e-mail addresses in <angle brackets> 2013-05-26 09:48:16 +02:00
GNUmakefile.in Update copyright notice 2017-07-02 17:45:44 +02:00
INSTALL INSTALL: Refresh from automake 1.13 2015-03-08 18:23:33 +01:00
Make.mk tests/update: New; exercises the update 2017-08-06 14:04:15 +02:00
README Update copyright notice 2017-07-02 17:45:44 +02:00

Welcome to Empire 4, code-named Wolfpack.

Empire is a multi-player, client/server Internet based war game.
Copyright (C) 1986-2016, Dave Pare, Jeff Bailey, Thomas Ruschak,
Ken Stevens, Steve McClure, Markus Armbruster

This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License (in file
`COPYING'), or (at your option) any later version.

See file `CREDITS' for a list of contributors.

Directory `doc' has additional information.  File `doc/README'
describes the files there and what they talk about.

To build the server and set up a game, follow the steps below.

(1) Unpacking the source tree

    If you downloaded a tarball, unpack it.

    If you cloned a git repository, run bootstrap.  This requires
    recent versions of Autoconf and Automake to be installed.  See
    also doc/contributing.

(2) Building a server

    Prerequisites: IEEE Std 1003.1-2001 (POSIX.1-2001), GNU make, a
    curses library, Perl, and either nroff or GNU troff (`groff').

    See file `INSTALL' for detailed compilation and installation
    instructions.  Quick guide for the impatient: run configure; make;
    make install.  The last step is optional; everything runs fine
    right from the build tree.

    If configure reports "terminfo: no" in its configuration summary,
    highlighting doesn't work in the client.  Commonly caused by not
    having development libraries installed.  On Linux, try installing
    ncurses-devel.

    If make fails without doing anything, you're probably not using
    GNU make.  Some systems have it installed as `gmake'.

    Solaris supports POSIX.1-2001, but you need to set up your
    environment for that.  Try passing
        SHELL=/usr/xpg4/bin/sh PATH=/usr/xpg6/bin:/usr/xpg4/bin:$PATH
    to make.  See standards(5) for details.

(3) Creating a game

    * Create a configuration for your game.  make install installs one
      in $prefix/etc/empire/econfig ($prefix is /usr/local unless you
      chose something else with configure).  You can use pconfig to
      create another one.

    * Edit your configuration file.  See doc/econfig for more
      information.

      Unless you put your configuration file in the default location
      (where make install installs it), you have to use -e with all
      programs to make them use your configuration.

    * Run files to set up your data directory.

    * Run fairland to create a world.  For a sample world, try
      `fairland 10 30'.  This creates file ./newcap_script, which will
      be used below.  You can edit it to change country names and
      passwords.

      Check out fairland's manual page for more information.

    * Start the server.  For development, you want to run it with -d
      in a debugger, see doc/debugging.  Do not use -d for a real
      game!

    * Log in as deity POGO with password peter.  This guide assumes
      you use the included client `empire', but other clients should
      work as well.

      For help, try `info'.

      To change the deity password, use `change re <password>'.

    * Create countries with `exec newcap_script'.

    Your game is now up!

Naturally, there's more to running a real game than that, but that's
beyond the scope of this file.

Please report bugs to <wolfpack@wolfpackempire.com> or via SourceForge
<http://sourceforge.net/projects/empserver/> (registration required).

For more information or help, try rec.games.empire on Usenet, or send
e-mail to <wolfpack@wolfpackempire.com> and we'll try to answer if we
can.  Also check out our web site at <http://www.wolfpackempire.com/>.

Have fun!

Wolfpack!