WorldCupSokerban file

# WorldCupSokerban
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**23apr17, v3.1.8**

* Includes precompiled solvers for both platforms [osx,linux].
* Puzzle files are now sorted alphabetically for intuitive navigation.
* An autosolver is now embedded within this application so that pressing the "=" key at any time initiates an attempt to solve the present state of the current puzzle. See extended description below.


**15apr17, v3.1.7**

* Now saves complete game state on exit. Thus, your progress through the levels of each puzzle file is preserved.
* Better equilibration of sounds.
* Precompiled solvers for both platforms are contained in soksolvers.tar.gz

See complete revision history at end of file.


## WorldCupSokerban
This is a soccer-themed, 3D sokoban puzzle game that includes 2 autosolvers. It uses sokoban puzzle data in a common format.

It has undo (u) and restart (r) functions. Comes with many puzzle files, each typically having dozens of "levels". The next (n) and previous (p) keys move between levels. The (Lshft) and (Rshft) keys move between the different puzzle files (there are currently 60). The (z) key creates a setpoint (reZero) so that subsequent restarts restore that setpoint.

To move the "pusher" use the arrow keys. The objective is to kick all the red and blue balls into the goal nets. Notice that these strange soccer balls roll in two perpendicular directions only!

The mouse can be used to control the game viewpoint. The mouse wheel adjusts the eye distance; a left button drag changes view angle; a right button click restores the default view settings. MacBooks can simulate these actions, as noted below.

Works on Macs running OS-X and PCs running GNU/Linux.


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## Features:
* laptop friendly;
* user definable puzzles;
* many predefined puzzles ranging from easy to nearly impossible;
* both GNU/linux and OSX binaries;
* full source code;
* supports high DPI mode on OS-X Retina displays;
* uses SFML for the sounds, SDL2 for input & window management;
* fully OpenGL 3.3 core profile Ada code;
* includes 2 autosolvers;

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## Embedded Autosolver Function
An autosolver (ibox) is now embedded within this application so that pressing the equal-key ("=") at any time initiates an attempt to solve the present state of the current puzzle within a limited amount of time. If successful then you will see an onscreen prompt to continue to press the equal-key to single-step toward the solution. Otherwise you will see no such prompt.

Thus, you can give yourself a headstart toward a correct solution by limited use of this feature. Once you think you can solve it yourself, stop using the equal-key and proceed manually. This really helps when you cannot see what your next move should be.

Embedded autosolver failure might imply the present state of the puzzle is impossible to solve, or simply that the autosolver failed due to time constraint, or insufficient capability.

## External Autosolvers
Remember that there are still two external autosolvers without time constraints. Subject to several limitations, typing: "solver-name puzzle-file-name.sok maxlevels level-number" will attempt to solve a particular puzzle for you, where solver-name is either "puller" or "ibox". There are many large or sparse [lishout] puzzles these solvers cannot handle, but they are pretty good at sovling the small dense ones. Use the script ccc.sh to compile either solver for your operating system (assuming the presence of an Ada compiler).




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## what is special about this project?
Uses the Ada programming language and fully modern OpenGL methods with textures, shaders and uniforms. Achieves version 3.3 core profile contexts, and compiles and runs on both GNU/Linux and Mac OS-X systems. This project serves as a testbed for learning the complexities of modern OpenGL and GLSL.

Focusing on portability and freedom, no coding effort or compromise has been made to accomodate proprietary operating systems. It relies on a thin SDL2 binding from Dan Vazquez, a thin OpenGL binding, a PNG reader by Stephen Sanguine, and SFML-Audio (because of its elegant audio interface).



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## Build Requirements:
* a recent GNAT Ada compiler;
* OpenGL 3.3 (or better) and a graphics card that supports it.
* Xcode g++ compiler, if using OS-X


## Build instructions:

ccc.sh is the build script for the two autosolvers "puller" and "ibox". Just type "ccc.sh puller" or "ccc.sh ibox" to compile on any platform, assuming the presence of a GNAT Ada compiler.

Two [pre-compiled] game executables are provided, one for gnu/linux and one for OS-X. The OSX executable is intended to have minimal runtime requirements: sokerban_osx. The linux binary sokerban_gnu, is intended to run in the presence of the directory "libLocal", which contains some dynamically loaded libraries that can be, but need not be present on a target system:
SDL2, SFML, FLAC, ogg, vorbis, & openal.

Two build scripts are described; and due to a recent script change, a linux build machine need not have a C++ compiler installed. Only GNAT is required.


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MacOSX:

: build script for generating a portable executable that will run on most recent OS-X platforms whether or not they have non-standard libraries such as GLEW, SDL2, SFML installed. I used this to build the executable that I deliver, named sokerban_osx. This script references delivered static library files for nonstandard libs.

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GNU/Linux:

: utilizes the relocatable libraries that I deliver in this bundle under ./libs/. I use this to build the gnu/linux executable that I deliver named sokerban_gnu, which should run in the presence of ./libs.

If the delivered linux binary does not run...

* Manually install GNAT GPL from libre.adacore.com/download/.
* Rerun the compile script lcmpd.sh.


### Fixable Link Problems during linux build:

On a linux build machine, you might have fixable link errors, depending on its configuration. If you are missing "libz", you can simply copy "libz.so" from /usr/gnat/lib/gps/ into /usr/local/lib/. If "libGL" cannot be found, this literally means "libGL.so" was absent. But you might have "libGL.so.1" present. In this case, simply create a softlink by changing to the libGL directory, then type the line:

sudo ln -s libGL.so.1 libGL.so (and enter the admin password)

whence the linker should now be able to find what it wants. But if there is more than one file libGL.so present on your system, make sure you use the best one; i.e. the one that uses accelerated graphics.



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## Running:

Requires OS-X or GNU/linux with a graphics card that supports OpenGL version 3.3;

Unzip the archive and you will see a new directory appear, that you may rename.

Users should then cd to the install-directory, then, at the command line, type the executable name to start the game.

Linux users can also double click the icon for sokerban_gnu in file manager.

Mac users note that this game may be initiated in two ways. First, by opening a terminal, navigating to the install-directory, and typing sokerban_osx on the command line. Second by navigating to the installation directory in Finder and clicking the "sokerban.app" icon named "Sokerban". Note also that a 2-finger-swipe simulates the mouse wheel on a MacBook; and a 2-finger click simulates the right button click to restore view settings, while a 1-finger click and drag simulates the left button drag on a mouse.

The install-directory should contain subdirectories named "data", "libs", and "games".


The GNU/linux executable must have access to ./libs unless your system already has the libraries it contains. Then, at the command line type:

sokerban_gnu ( or sokerban_osx )

Remember, the WASD or arrow keys control movements and the keyboard controls for view are:
* (c) closer
* (f) further
* (0) defaults
* (/) tilt up
* (\\) tilt down
* (=) try to autosolve


================================================================

I anticipate some problems with the newly attached autosolver so please report them and any questions or comments to fastrgv@gmail.com

================================================================


---------------------------------
## legal mumbo jumbo:

W.C.Sokerban itself is covered by the GNU GPL v3 as indicated in the sources:

Copyright (C) 2015 <fastrgv@gmail.com>

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, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.

You may read the full text of the GNU General Public License
at <http://www.gnu.org/licenses/>.


---------------------------------
## Media Files:

### General Note
The particular choice of sound and image files delivered are not essential to the function of the game and are easily replaced. This software is primarily intended as a tutorial example of modern OpenGL methods. The only requirements are that sounds be in WAV format and images be in PNG format.

### SoundFiles
Andres Cantor sound downloaded from YouTube and trimmed with FFMPEG. Kick sound is from freesound.org so is covered by the Creative Commons Noncommercial License; see
Creativecommons.org

### ImageFiles
...for textures were freely [no copyright indications] available on google images. Files for text-textures were created using gimp and are also covered by the GNU GPL v3 license. The pusher man is modified from a skin by Anders Widell, so thanks to Anders for that. An alternate pusher is also available that was obtained from OpenGameArt.org and created by felixschuett with a CC0 license.


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## Best Download Site for all my games:
Github.com

Tags: sokoban, puzzle, soccer, football


## Older Revision History:


**7apr17, v3.1.6**

* Improved error checking in shader package;
* Removed OpenGL-deprecated functions that could cause aborts;
* Revised directory structure, simplified codes;


**3jan17, v3.1.5**

* Updated to use new SFML libs.
* Corrected a duplicate window glitch.
* Refined compiler scripts.


**30dec16, v3.1.4**

* Increased max # soccer balls to handle all puzzles.
* Now using generalized SFML-audio interface code: snd4ada.cpp.
* Added WASD keys for movement.
* Improved build system to be compatible with more linux distros.
* Improved OpenGL coding to also support Intel Skylake embedded graphics.


**16aug2016, v3.1.3**

* Improved code design of snd4ada.cpp.
* Next(n) and Prev(p) keys now move between the different puzzle levels while in single file test mode, just as in the normal mode.
* Now includes two, somewhat more refined, sokoban solvers written in Ada: 1) puller; 2) ibox. These replace the CPP solver previously included. Use the script "ccc.sh" to compile either in any O.S.


**12apr2016, v3.1.2**

* Important library update for Gnu/Linux users on 27% of distros that do not provide FLAC, ogg, vorbis libraries. Missing softlinks caused run failure. That is now fixed.


**20feb2016, v3.1.1**

* Added Mac binary bundle that acts like a typical Mac App. This app is delivered in the installation directory, but could be moved elsewhere, such as your personal Applications directory [and initiated with a click]. Note that there are some soft [symbolic] links in the bundle that are resolved automatically when copied with the command "cp -r sokerban.app destination-directory".
* Generalized utex package.


**12jan2016, v3.1**

* Further improved man texture.
* Fixed error causing excessive field width.
* Moved puzzle centroid to center field.
* Closer key (c) now zooms directly toward center field.
* Refined key delay.
* Fixed single-file-mode, which was not working.
* Now puzzle names are read dynamically from the ./games/ directory, rather than being hardcoded.


**09jan2016, v3.0**

* Elliminated edge artifact on man texture.
* Added keyboard controls for view
* (c) closer
* (f) further
* (d) defaults
* (/) tilt up
* (\\) tilt down


**09jan2016, v2.9**

* Pusher man now has a bit of an upward tilt.
* Mouse now controls game viewpoint. The mouse wheel adjusts the eye distance; a left button drag changes view angle; a right button click restores the default view settings. Now you can get much closer to the action!

**29nov2015, v2.8**

* Improved PNG loader procedure now handles both RGBA and RGB image files for textures.
* Discovered a non-repeatable problem of disappearing soccer-balls. Clearing the variable namespace seems to have fixed it.
* Revised goal sound logic.


**15nov2015, v2.7**

* Transcribed from C++, this app is now written completely in the Ada language.
* Revised pusher (thanks to Anders Widell).