Decoded: OpenTTD (2003) v1.8 (2018)
Source file: geometry_type.hpp
Line-by-line code walkthrough by MaiZure

geometry_type.hpp defines various geometric types

Original code:
https://github.com/MaiZure/OpenTTD-1.8/blob/master/src/core/geometry_type.hpp





1     COMMENT (*)
2     BLANK (-)
3     *
4     *
5     *
6     *
7     *
8     *
9     -
10    *
11    -
12    Header guard
13    Header guard
14    -
15    Check this this is an Amiga because...
16    *
17    Assign Point to be the Amiga builtin
18    End check for Amiga
19    -
20    Check if this is an Apple because...
21    *
22    Assign Rect to the Apple built in Rect
23    Assign Point to the Apple built in Point
24    End check for Apple
25    -
26    -
27    *
28    BLOCK START - Point, a structure with two members
29    Declares an integer member for the x dimension
30    Declares an integer member for the y dimension
31    BLOCK END - Point
32    -
33    *
34    BLOCK START - Dimension, a relative structure with two members
35    Declares a positive integer member for width
36    Declares a positive integer member for height
37    BLOCK END - Dimension
38    -
39    *
40    BLOCK START - Rect, an absolute specification of a rectangle
41    Declares the left line position member
42    Declares the top line position member
43    Declares the right line position member
44    Declares the bottom line position member
45    BLOCK END - Rect
46    -
47    *
48    *
49    *
50    *
51    BLOCK START - PointDimension, a hybrid point/size structure
52    Declares the top left x position member
53    Declares the top left y position member
54    Declares a member for width
55    Declares a member for height
56    BLOCK END - PointDimension
57    -
58    *
59    BLOCK START - Pair, two values with some specified relation
60    Declares member value a
61    Declares member value b
62    BLOCK END - Pair
63    -
64    Header guard endG