taurus 0.1.1

A WIP roguelike game being developed in Rust.
Documentation 
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
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151

//! User interface module.

use crate::console::Color;
use crate::constants;
use crate::coord::Coord;
use crate::database::Database;
use crate::defs::big_to_usize;
use crate::dungeon::Dungeon;
use crate::game_data::GameData;
use crate::util::rectangle::Rectangle;
use crate::{GameResult, CONSOLE, GAMEDATA};
use std::cell::Cell;
use std::str::FromStr;

pub fn calc_game_view() -> Rectangle {
    let game_data = GAMEDATA.read().unwrap();

    let settings = game_data.ui_settings;
    let game_width = settings.game_width;
    let game_height = settings.game_height;

    let player = game_data.player().coord();

    let width_radius = (game_width / 2) as i32;
    let height_radius = (game_height / 2) as i32;

    let view_left = player.x - width_radius;
    let view_top = player.y - height_radius;
    let view_right = player.x + width_radius;
    let view_bottom = player.y + height_radius;

    Rectangle::new(view_left, view_top, view_right, view_bottom)
}

#[derive(Copy, Clone, Debug)]
pub struct UiSettings {
    pub game_width: usize,
    pub game_height: usize,
}

impl UiSettings {
    pub fn new(data: &Database) -> GameResult<UiSettings> {
        // Load all data from the database.

        let game_width = big_to_usize(data.get_int("game_width")?)?;
        let game_height = big_to_usize(data.get_int("game_height")?)?;

        // Create the struct.

        Ok(UiSettings {
            game_width,
            game_height,
        })
    }
}

/// Trait for any object that can be drawn.
pub trait Draw {
    fn draw_c(&self) -> char;
    fn draw_color(&self) -> Color;
}

pub fn draw_all(dungeon: &Dungeon) {
    CONSOLE.lock().unwrap().clear();

    draw_game(dungeon);

    CONSOLE.lock().unwrap().flush();
}

pub fn draw_game(dungeon: &Dungeon) {
    let mut console = CONSOLE.lock().unwrap();

    let view = calc_game_view();

    let dungeon_width = dungeon.width() as i32;
    let dungeon_height = dungeon.height() as i32;

    for x in 0.max(view.left)..dungeon_width.min(view.right + 1) {
        for y in 0.max(view.top)..dungeon_height.min(view.bottom + 1) {
            debug_assert!(x >= 0);
            debug_assert!(y >= 0);

            let coord = Coord::new(x, y);
            let tile = &dungeon[coord];

            let draw_x = x - view.left;
            let draw_y = y - view.top;

            let mut draw_c;
            let mut draw_color;

            if !dungeon.visible(coord) {
                // Tile not currently visible.

                match tile.last_seen.get() {
                    Some((c, color)) => {
                        draw_c = c;

                        // Darken the last seen tile color.
                        let factor: f32 = 0.5;
                        draw_color = Color {
                            r: (f32::from(color.r) * factor) as u8,
                            g: (f32::from(color.g) * factor) as u8,
                            b: (f32::from(color.b) * factor) as u8,
                        };
                    }
                    None => continue,
                }
            } else {
                // Tile currently visible.

                // Common case is that we draw a tile, so initialize with tile's values.
                draw_c = tile.info.draw_c();
                draw_color = tile.info.draw_color();
                let mut foreground_drawn = false;

                // Draw actor.
                if let Some(ref actor) = tile.actor {
                    if actor.visible() {
                        draw_c = actor.draw_c();
                        draw_color = actor.draw_color();
                        foreground_drawn = true;
                    }
                }

                // Draw item stash.
                if let Some(ref stash) = tile.item_stash {
                    if !foreground_drawn {
                        draw_c = stash.draw_c();
                        draw_color = stash.draw_color();
                        foreground_drawn = true;
                    }
                }

                // Draw object.
                if let Some(ref object) = tile.object {
                    let object = object.inner.lock().unwrap();
                    if !foreground_drawn && object.visible() {
                        draw_c = object.draw_c();
                        draw_color = object.draw_color();
                    }
                }

                tile.last_seen.set(Some((draw_c, draw_color)));
            }

            console.draw_char(draw_x, draw_y, draw_c, draw_color);
        }
    }
}