   Ŀ
00                                                                 
01                                                                 
02                                                                 
03                                                                 
04                                                                 
05                                                                 
06                                                                 
07                                                                 
   Ĵ
08               ....                            ....              
09             ..    ..                        ..    ..            
10           ..        ..                    ..        ..          
11         ..            ..                ..            ..        
12       ..                ..            ..                ..      
13     ..                    ..        ..                    ..    
14   ..                        ..    ..                        ..  
15 ..       ceilinggrid          ....                            ..
   Ĵ
16   ..                        ..  **..                        ..  
17     ..                    ..    ****..                    ..    
18       ..                ..      ******..                ..      
19         ..            ..        ********..            ..        
20           ..        ..          **********..        ..          
21             ..    ..            ************..    ..            
22               ....              **************....              
23                                 ****************                
   Ĵ
24                                 ****************                
25                                 ****************                
26                                 ****************                
27                                 ****************                
28                                 ****************                
29                                 ****  wall  ****                
30                                 ****************                
31                                 ****************                
   Ĵ
32               ####              ****************##              
33             ##    ##            ****************  ##            
34           ##        ##          ****************    ##          
35         ##            ##        ****************      ##        
36       ##                ##      ****************        ##      
37     ##                    ##    ****************          ##    
38   ##                        ##  ****************            ##  
39 ##         floorgrid          ##****************              ##
   Ĵ
40   ##                        ##  ****************            ##  
41     ##                    ##      **************          ##    
42       ##                ##          ************        ##      
43         ##            ##              **********      ##        
44           ##        ##                  ********    ##          
45             ##    ##                      ******  ##            
46               ####                          ****##              
47                                                                 
   
    0123456789012345 6789012345678901 2345678901234567 8901234567890123
    0         1          2         3          4          5         6


The battlefield can be logically divided into rectangles 16x8 each 
(which allows to use dirty rectangles technique easily).

Floor grid size: 32x15

Cell 2D projection dimensions can be described with 3 numbers: (16, 8, 24)

Adding 16 to X and 8 to Y you get to the next grid.
Adding 24 to Y you get from a floor grid to its ceiling.

                              ....
                            ..    ..
                          ..        ..
                        ..            ..
                      ..                ..
                    ..                    ..
                  ..                        ..
                ..                            ..
              ####..                        ..
            ##    ##..                    .. 
          ##        ##..                ..   
        ##            ##..            ..
      ##                ##..        ..
    ##                    ##..    ..
  ##                        ##....              
##                            ##
  ##                        ##  
    ##                    ##    
      ##                ##      
        ##            ##        
          ##        ##          
            ##    ##
              ####

Note: this file can contain errors but it is intended to give general
      information about XCOM1(2) and UFO2000 graphics formats.
