tiny_rpg/
render.rs

1use sdl2::pixels::Color;
2use sdl2::rect::Rect;
3use sdl2::render::Canvas;
4use sdl2::video::Window;
5
6use crate::entity;
7use crate::math::{self, TwoDimensional};
8
9pub fn render_objects(
10    tile_size: u32,
11    screen_size: math::Dimension,
12    canvas: &mut Canvas<Window>,
13    player: &entity::Entity,
14    objects: &Vec<entity::Entity>,
15) {
16    canvas.set_draw_color(Color::RGB(0, 0, 0));
17    canvas.clear();
18
19    render_player(tile_size, screen_size, canvas, player);
20    for object in objects.iter() {
21        render_entity(
22            tile_size,
23            screen_size,
24            canvas,
25            object,
26            player.get_rectangle(),
27        );
28    }
29
30    canvas.present();
31}
32
33pub fn render_player(
34    tile_size: u32,
35    screen_size: math::Dimension,
36    canvas: &mut Canvas<Window>,
37    entity: &entity::Entity,
38) {
39    let entity_rectangle = Rect::new(
40        (screen_size.get_width() / 2 - 1) as i32,
41        (screen_size.get_height() / 2 - 1) as i32,
42        entity.get_rectangle().width() * tile_size,
43        entity.get_rectangle().height() * tile_size,
44    );
45    let (red, green, blue) = entity.get_skin().get_rgb_colors().unwrap();
46
47    canvas.set_draw_color(Color::RGB(red, green, blue));
48    canvas.fill_rect(entity_rectangle);
49}
50
51pub fn render_entity(
52    tile_size: u32,
53    screen_size: math::Dimension,
54    canvas: &mut Canvas<Window>,
55    entity: &entity::Entity,
56    player_rect: math::Rectangle,
57) {
58    let (x, y) = entity.get_position().get_coordinates();
59    let (width, height) = entity.get_size().get_coordinates();
60    let entity_rectangle = Rect::new(
61        (x - player_rect.x()) * tile_size as i32 + (screen_size.get_width() / 2 - 1) as i32,
62        (y - player_rect.y()) * tile_size as i32 + (screen_size.get_height() / 2 - 1) as i32,
63        width * tile_size,
64        height * tile_size,
65    );
66    let (red, green, blue) = entity.get_skin().get_rgb_colors().unwrap();
67
68    canvas.set_draw_color(Color::RGB(red, green, blue));
69    canvas.fill_rect(entity_rectangle);
70}
tiny_rpg/render.rs

tiny_rpg/
render.rs
