Extremely simple sand cellular automata written in Go
Initialize repo
Signed-off-by: Amy <amy+git@amogus.cloud>
+210
+29
go.mod
+29
go.mod
···
1
+
module github.com/amycatgirl/sand-go
2
+
3
+
go 1.25.3
4
+
5
+
require (
6
+
github.com/charmbracelet/bubbletea v1.3.10
7
+
golang.org/x/term v0.36.0
8
+
)
9
+
10
+
require (
11
+
github.com/aymanbagabas/go-osc52/v2 v2.0.1 // indirect
12
+
github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc // indirect
13
+
github.com/charmbracelet/lipgloss v1.1.0 // indirect
14
+
github.com/charmbracelet/x/ansi v0.10.1 // indirect
15
+
github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd // indirect
16
+
github.com/charmbracelet/x/term v0.2.1 // indirect
17
+
github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f // indirect
18
+
github.com/lucasb-eyer/go-colorful v1.2.0 // indirect
19
+
github.com/mattn/go-isatty v0.0.20 // indirect
20
+
github.com/mattn/go-localereader v0.0.1 // indirect
21
+
github.com/mattn/go-runewidth v0.0.16 // indirect
22
+
github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 // indirect
23
+
github.com/muesli/cancelreader v0.2.2 // indirect
24
+
github.com/muesli/termenv v0.16.0 // indirect
25
+
github.com/rivo/uniseg v0.4.7 // indirect
26
+
github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e // indirect
27
+
golang.org/x/sys v0.37.0 // indirect
28
+
golang.org/x/text v0.30.0 // indirect
29
+
)
+45
go.sum
+45
go.sum
···
1
+
github.com/aymanbagabas/go-osc52/v2 v2.0.1 h1:HwpRHbFMcZLEVr42D4p7XBqjyuxQH5SMiErDT4WkJ2k=
2
+
github.com/aymanbagabas/go-osc52/v2 v2.0.1/go.mod h1:uYgXzlJ7ZpABp8OJ+exZzJJhRNQ2ASbcXHWsFqH8hp8=
3
+
github.com/charmbracelet/bubbletea v1.3.10 h1:otUDHWMMzQSB0Pkc87rm691KZ3SWa4KUlvF9nRvCICw=
4
+
github.com/charmbracelet/bubbletea v1.3.10/go.mod h1:ORQfo0fk8U+po9VaNvnV95UPWA1BitP1E0N6xJPlHr4=
5
+
github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc h1:4pZI35227imm7yK2bGPcfpFEmuY1gc2YSTShr4iJBfs=
6
+
github.com/charmbracelet/colorprofile v0.2.3-0.20250311203215-f60798e515dc/go.mod h1:X4/0JoqgTIPSFcRA/P6INZzIuyqdFY5rm8tb41s9okk=
7
+
github.com/charmbracelet/lipgloss v1.1.0 h1:vYXsiLHVkK7fp74RkV7b2kq9+zDLoEU4MZoFqR/noCY=
8
+
github.com/charmbracelet/lipgloss v1.1.0/go.mod h1:/6Q8FR2o+kj8rz4Dq0zQc3vYf7X+B0binUUBwA0aL30=
9
+
github.com/charmbracelet/x/ansi v0.10.1 h1:rL3Koar5XvX0pHGfovN03f5cxLbCF2YvLeyz7D2jVDQ=
10
+
github.com/charmbracelet/x/ansi v0.10.1/go.mod h1:3RQDQ6lDnROptfpWuUVIUG64bD2g2BgntdxH0Ya5TeE=
11
+
github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd h1:vy0GVL4jeHEwG5YOXDmi86oYw2yuYUGqz6a8sLwg0X8=
12
+
github.com/charmbracelet/x/cellbuf v0.0.13-0.20250311204145-2c3ea96c31dd/go.mod h1:xe0nKWGd3eJgtqZRaN9RjMtK7xUYchjzPr7q6kcvCCs=
13
+
github.com/charmbracelet/x/term v0.2.1 h1:AQeHeLZ1OqSXhrAWpYUtZyX1T3zVxfpZuEQMIQaGIAQ=
14
+
github.com/charmbracelet/x/term v0.2.1/go.mod h1:oQ4enTYFV7QN4m0i9mzHrViD7TQKvNEEkHUMCmsxdUg=
15
+
github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f h1:Y/CXytFA4m6baUTXGLOoWe4PQhGxaX0KpnayAqC48p4=
16
+
github.com/erikgeiser/coninput v0.0.0-20211004153227-1c3628e74d0f/go.mod h1:vw97MGsxSvLiUE2X8qFplwetxpGLQrlU1Q9AUEIzCaM=
17
+
github.com/lucasb-eyer/go-colorful v1.2.0 h1:1nnpGOrhyZZuNyfu1QjKiUICQ74+3FNCN69Aj6K7nkY=
18
+
github.com/lucasb-eyer/go-colorful v1.2.0/go.mod h1:R4dSotOR9KMtayYi1e77YzuveK+i7ruzyGqttikkLy0=
19
+
github.com/mattn/go-isatty v0.0.20 h1:xfD0iDuEKnDkl03q4limB+vH+GxLEtL/jb4xVJSWWEY=
20
+
github.com/mattn/go-isatty v0.0.20/go.mod h1:W+V8PltTTMOvKvAeJH7IuucS94S2C6jfK/D7dTCTo3Y=
21
+
github.com/mattn/go-localereader v0.0.1 h1:ygSAOl7ZXTx4RdPYinUpg6W99U8jWvWi9Ye2JC/oIi4=
22
+
github.com/mattn/go-localereader v0.0.1/go.mod h1:8fBrzywKY7BI3czFoHkuzRoWE9C+EiG4R1k4Cjx5p88=
23
+
github.com/mattn/go-runewidth v0.0.16 h1:E5ScNMtiwvlvB5paMFdw9p4kSQzbXFikJ5SQO6TULQc=
24
+
github.com/mattn/go-runewidth v0.0.16/go.mod h1:Jdepj2loyihRzMpdS35Xk/zdY8IAYHsh153qUoGf23w=
25
+
github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6 h1:ZK8zHtRHOkbHy6Mmr5D264iyp3TiX5OmNcI5cIARiQI=
26
+
github.com/muesli/ansi v0.0.0-20230316100256-276c6243b2f6/go.mod h1:CJlz5H+gyd6CUWT45Oy4q24RdLyn7Md9Vj2/ldJBSIo=
27
+
github.com/muesli/cancelreader v0.2.2 h1:3I4Kt4BQjOR54NavqnDogx/MIoWBFa0StPA8ELUXHmA=
28
+
github.com/muesli/cancelreader v0.2.2/go.mod h1:3XuTXfFS2VjM+HTLZY9Ak0l6eUKfijIfMUZ4EgX0QYo=
29
+
github.com/muesli/termenv v0.16.0 h1:S5AlUN9dENB57rsbnkPyfdGuWIlkmzJjbFf0Tf5FWUc=
30
+
github.com/muesli/termenv v0.16.0/go.mod h1:ZRfOIKPFDYQoDFF4Olj7/QJbW60Ol/kL1pU3VfY/Cnk=
31
+
github.com/rivo/uniseg v0.2.0/go.mod h1:J6wj4VEh+S6ZtnVlnTBMWIodfgj8LQOQFoIToxlJtxc=
32
+
github.com/rivo/uniseg v0.4.7 h1:WUdvkW8uEhrYfLC4ZzdpI2ztxP1I582+49Oc5Mq64VQ=
33
+
github.com/rivo/uniseg v0.4.7/go.mod h1:FN3SvrM+Zdj16jyLfmOkMNblXMcoc8DfTHruCPUcx88=
34
+
github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e h1:JVG44RsyaB9T2KIHavMF/ppJZNG9ZpyihvCd0w101no=
35
+
github.com/xo/terminfo v0.0.0-20220910002029-abceb7e1c41e/go.mod h1:RbqR21r5mrJuqunuUZ/Dhy/avygyECGrLceyNeo4LiM=
36
+
golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561 h1:MDc5xs78ZrZr3HMQugiXOAkSZtfTpbJLDr/lwfgO53E=
37
+
golang.org/x/exp v0.0.0-20220909182711-5c715a9e8561/go.mod h1:cyybsKvd6eL0RnXn6p/Grxp8F5bW7iYuBgsNCOHpMYE=
38
+
golang.org/x/sys v0.0.0-20210809222454-d867a43fc93e/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
39
+
golang.org/x/sys v0.6.0/go.mod h1:oPkhp1MJrh7nUepCBck5+mAzfO9JrbApNNgaTdGDITg=
40
+
golang.org/x/sys v0.37.0 h1:fdNQudmxPjkdUTPnLn5mdQv7Zwvbvpaxqs831goi9kQ=
41
+
golang.org/x/sys v0.37.0/go.mod h1:OgkHotnGiDImocRcuBABYBEXf8A9a87e/uXjp9XT3ks=
42
+
golang.org/x/term v0.36.0 h1:zMPR+aF8gfksFprF/Nc/rd1wRS1EI6nDBGyWAvDzx2Q=
43
+
golang.org/x/term v0.36.0/go.mod h1:Qu394IJq6V6dCBRgwqshf3mPF85AqzYEzofzRdZkWss=
44
+
golang.org/x/text v0.30.0 h1:yznKA/E9zq54KzlzBEAWn1NXSQ8DIp/NYMy88xJjl4k=
45
+
golang.org/x/text v0.30.0/go.mod h1:yDdHFIX9t+tORqspjENWgzaCVXgk0yYnYuSZ8UzzBVM=
+136
main.go
+136
main.go
···
1
+
package main
2
+
3
+
import (
4
+
"fmt"
5
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"math/rand/v2"
6
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"os"
7
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"time"
8
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9
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tea "github.com/charmbracelet/bubbletea"
10
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"golang.org/x/term"
11
+
)
12
+
13
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type state struct {
14
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board [][]CellType
15
+
rows int
16
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cols int
17
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}
18
+
19
+
type tickMsg time.Time
20
+
21
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type CellType int
22
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23
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const (
24
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CellAir CellType = iota
25
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CellSolid
26
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)
27
+
28
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func NewState(rows int, cols int) state {
29
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matrix := make([][]CellType, rows)
30
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31
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for y := range matrix {
32
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matrix[y] = make([]CellType, cols)
33
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}
34
+
35
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for y := range matrix {
36
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for x := range matrix {
37
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if rand.IntN(2) == 0 {
38
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matrix[y][x] = CellAir
39
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} else {
40
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matrix[y][x] = CellSolid
41
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}
42
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}
43
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}
44
+
45
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return state{
46
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board: matrix,
47
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rows: rows,
48
+
cols: cols,
49
+
}
50
+
}
51
+
52
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func (s state) Init() tea.Cmd {
53
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return tea.Batch(
54
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tick(),
55
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tea.EnterAltScreen,
56
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)
57
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}
58
+
59
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func tick() tea.Cmd {
60
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return tea.Tick(35*time.Millisecond, func(t time.Time) tea.Msg {
61
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return tickMsg(t)
62
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})
63
+
}
64
+
65
+
func (s *state) updateBoard() {
66
+
for y := range s.board {
67
+
for x := range s.board[y] {
68
+
if s.board[y][x] == CellSolid {
69
+
if s.inBoard(x, y+1) && s.board[y+1][x] == CellAir {
70
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s.board[y][x] = CellAir
71
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s.board[y+1][x] = CellSolid
72
+
} else if s.inBoard(x+1, y+1) && s.board[y+1][x+1] == CellAir {
73
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s.board[y+1][x+1] = 1
74
+
s.board[y][x] = 0
75
+
}
76
+
}
77
+
}
78
+
}
79
+
}
80
+
81
+
func (s state) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
82
+
switch msg := msg.(type) {
83
+
case tea.KeyMsg:
84
+
switch msg.String() {
85
+
case "ctrl+c", "q":
86
+
return s, tea.Quit
87
+
}
88
+
case tickMsg:
89
+
s.updateBoard()
90
+
return s, tick()
91
+
}
92
+
93
+
return s, nil
94
+
}
95
+
96
+
func (s state) inBoard(x int, y int) bool {
97
+
if (x >= 0 && x < s.cols) && (y >= 0 && y < s.rows) {
98
+
return true
99
+
}
100
+
101
+
return false
102
+
}
103
+
104
+
func (s state) View() string {
105
+
board := ""
106
+
for y := range s.board {
107
+
row := ""
108
+
109
+
for x := range s.board[y] {
110
+
if s.board[y][x] == CellAir {
111
+
row += "\x1b[0;30m█"
112
+
} else {
113
+
row += "\x1b[0;32m█"
114
+
}
115
+
}
116
+
117
+
row += "\n"
118
+
board += row
119
+
}
120
+
121
+
return board
122
+
}
123
+
124
+
func main() {
125
+
cols, rows, err := term.GetSize(int(os.Stdin.Fd()))
126
+
if err != nil {
127
+
panic(fmt.Errorf("Error whilst getting terminal size: %w", err))
128
+
}
129
+
130
+
p := tea.NewProgram(NewState(rows, cols))
131
+
132
+
if _, err := p.Run(); err != nil {
133
+
fmt.Printf("Error while running sim: %v", err)
134
+
os.Exit(1)
135
+
}
136
+
}