sge 1.0.2

Simple game engine
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

use std::f32::consts::FRAC_PI_2;

use sge::prelude::*;

fn main() -> anyhow::Result<()> {
    init("Particles")?;

    let mut ps = ParticleSystem::new();
    let batch = ParticleBatch::builder()
        .shape(Rect::new_square(Vec2::ZERO, 20.0, Color::YELLOW_500))
        .size_randomness(5.0)
        .color_randomness(Color::new(0.3, 0.1, 0.1))
        .direction(-FRAC_PI_2)
        .direction_randomness(0.5)
        .speed(40.0)
        .speed_randomness(3.0)
        .rotation_speed_randomness(0.2)
        .end_color(Color::RED_700)
        .acceleration(vec2(0.0, 1.0))
        .acceleration_randomness(vec2(0.0, 0.2))
        .lifetime(2.0)
        .quantity(100)
        .build();

    loop {
        draw_multiline_text(
            format!(
                "Press space\n{} particles\n{:.2} FPS",
                ps.num_particles(),
                avg_fps()
            ),
            Vec2::ZERO,
            1.0,
        );

        if once_per_n_seconds(0.1) {
            ps.spawn_batch(&batch, last_cursor_pos());
        }

        ps.update();
        ps.draw();

        if should_quit() {
            break;
        }

        next_frame();
    }

    Ok(())
}