alex/beta-minecraft-rust

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129

use crate::nbt::Compound;
use crate::world::Material;

pub const SIZE: usize = 128;
pub const PALETTE: [u32; 14] = [
    0, 8368696, 16247203, 10987431, 16711680, 10526975, 10987431, 31744, 16777215, 10791096,
    12020271, 7368816, 4210943, 6837042,
];

#[derive(Clone, Debug)]
pub struct Map {
    pub center: [i32; 2],
    pub dimension: i8,
    pub scale: u8,
    pub colors: Box<[u8; SIZE * SIZE]>,
    pub icons: Vec<[i8; 3]>,
}

impl Map {
    pub fn new(center: [i32; 2], dimension: i8) -> Self {
        Self {
            center,
            dimension,
            scale: 3,
            colors: Box::new([0; SIZE * SIZE]),
            icons: Vec::new(),
        }
    }
    pub fn read(nbt: &Compound) -> Self {
        let mut map = Self::new(
            [nbt.int("xCenter"), nbt.int("zCenter")],
            nbt.byte("dimension"),
        );
        map.scale = nbt.byte("scale").clamp(0, 4) as u8;
        let width = i32::from(nbt.short("width"));
        let height = i32::from(nbt.short("height"));
        let bytes = nbt.byte_array("colors");
        if width > 0 && height > 0 {
            for y in ((height - 128) / 2).max(0)..height.min((height + 128) / 2) {
                for x in ((width - 128) / 2).max(0)..width.min((width + 128) / 2) {
                    let tx = x + (128 - width) / 2;
                    let ty = y + (128 - height) / 2;
                    if (0..128).contains(&tx)
                        && (0..128).contains(&ty)
                        && let Some(&color) = bytes.get((x + y * width) as usize)
                    {
                        map.colors[(tx + ty * 128) as usize] = color;
                    }
                }
            }
        }
        map
    }
    pub fn write(&self, nbt: &mut Compound) {
        nbt.set_int("xCenter", self.center[0]);
        nbt.set_int("zCenter", self.center[1]);
        nbt.set_byte("dimension", self.dimension);
        nbt.set_byte("scale", self.scale as i8);
        nbt.set_short("width", 128);
        nbt.set_short("height", 128);
        nbt.set_byte_array("colors", self.colors.to_vec());
    }
    pub fn receive(&mut self, data: &[u8]) -> bool {
        match data {
            [0, x, y, colors @ ..]
                if !colors.is_empty() && *x < 128 && usize::from(*y) + colors.len() <= 128 =>
            {
                for (offset, &color) in colors.iter().enumerate() {
                    self.colors[usize::from(*x) + (usize::from(*y) + offset) * 128] = color;
                }
                true
            }
            [1, icons @ ..] if icons.len().is_multiple_of(3) => {
                self.icons = icons
                    .as_chunks::<3>()
                    .0
                    .iter()
                    .map(|p| [p[0] as i8, p[1] as i8, p[2] as i8])
                    .collect();
                true
            }
            _ => false,
        }
    }
    pub fn rgba(&self) -> Vec<u8> {
        self.colors
            .iter()
            .enumerate()
            .flat_map(|(index, &color)| {
                let Some(&rgb) = PALETTE
                    .get(usize::from(color / 4))
                    .filter(|_| color / 4 != 0)
                else {
                    return [0, 0, 0, ((index + index / 128) & 1) as u8 * 8 + 16];
                };
                let shade = match color & 3 {
                    0 => 180,
                    2 => 255,
                    _ => 220,
                };
                [
                    ((rgb >> 16 & 255) * shade / 255) as u8,
                    ((rgb >> 8 & 255) * shade / 255) as u8,
                    ((rgb & 255) * shade / 255) as u8,
                    255,
                ]
            })
            .collect()
    }
}

pub fn material_color(material: Material) -> u8 {
    match material {
        Material::Grass => 1,
        Material::Sand => 2,
        Material::Cloth | Material::Sponge | Material::Web => 3,
        Material::Lava | Material::Tnt => 4,
        Material::Ice => 5,
        Material::Iron => 6,
        Material::Leaves | Material::Plants | Material::Cactus | Material::Pumpkin => 7,
        Material::Snow | Material::BuiltSnow => 8,
        Material::Clay => 9,
        Material::Ground => 10,
        Material::Rock | Material::Piston => 11,
        Material::Water => 12,
        Material::Wood => 13,
        _ => 0,
    }
}