1 package geo
2
3 type Orientation int
4
5 const (
6 TopLeft Orientation = iota
7 TopRight
8 BottomLeft
9 BottomRight
10
11 Top
12 Right
13 Bottom
14 Left
15
16 NONE
17 )
18
19 func (o Orientation) ToString() string {
20 switch o {
21 case TopLeft:
22 return "TopLeft"
23 case TopRight:
24 return "TopRight"
25 case BottomLeft:
26 return "BottomLeft"
27 case BottomRight:
28 return "BottomRight"
29
30 case Top:
31 return "Top"
32 case Right:
33 return "Right"
34 case Bottom:
35 return "Bottom"
36 case Left:
37 return "Left"
38 default:
39 return ""
40 }
41 }
42
43 func (o1 Orientation) SameSide(o2 Orientation) bool {
44 sides := [][]Orientation{
45 {TopLeft, Top, TopRight},
46 {BottomLeft, Bottom, BottomRight},
47 {Left, TopLeft, BottomLeft},
48 {Right, TopRight, BottomRight},
49 }
50 for _, sameSides := range sides {
51 isO1 := false
52 for _, side := range sameSides {
53 if side == o1 {
54 isO1 = true
55 break
56 }
57 }
58 if isO1 {
59 for _, side := range sameSides {
60 if side == o2 {
61 return true
62 }
63 }
64 }
65 }
66 return false
67 }
68
69 func (o Orientation) IsDiagonal() bool {
70 return o == TopLeft || o == TopRight || o == BottomLeft || o == BottomRight
71 }
72
73 func (o Orientation) IsHorizontal() bool {
74 return o == Left || o == Right
75 }
76
77 func (o Orientation) IsVertical() bool {
78 return o == Top || o == Bottom
79 }
80
81 func (o Orientation) GetOpposite() Orientation {
82 switch o {
83 case TopLeft:
84 return BottomRight
85 case TopRight:
86 return BottomLeft
87 case BottomLeft:
88 return TopRight
89 case BottomRight:
90 return TopLeft
91
92 case Top:
93 return Bottom
94 case Bottom:
95 return Top
96 case Right:
97 return Left
98 case Left:
99 return Right
100
101 default:
102 return o
103 }
104 }
105
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