wgpu-shapes 0.2.1

simple shape renderer for wgpu
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

use std::f32::consts::PI;
use std::iter::once;

use wgpu::{CommandEncoder, RenderPipeline, TextureView};
use wgpu_noboiler::app::{AppCreator, AppData};
use winit::dpi::PhysicalSize;
use winit::event::{ElementState, MouseButton, WindowEvent};

use wgpu_shapes::shape::shapes::BasicShape;
use wgpu_shapes::shape_renderer::ShapeRenderer;

struct State {
    shape_renderer: Option<ShapeRenderer>,
    dragging: bool,
    last_drag_pos: (f32, f32),
}

fn main() {
    AppCreator::new(State {
        shape_renderer: None,
        dragging: false,
        last_drag_pos: (0.0, 0.0),
    })
    .render(render)
    .init(init)
    .resize(resize)
    .window_event(event)
    .run();
}

fn render(
    data: &AppData,
    state: &mut State,
    mut encoder: CommandEncoder,
    texture_view: TextureView,
) {
    let shape_renderer = state.shape_renderer.as_mut().unwrap();

    shape_renderer.clear();

    shape_renderer
        .oval()
        .scale(500.0, 500.0)
        .color(0.0, 0.0, 0.0)
        .layer(0);

    shape_renderer
        .rect()
        .scale(400.0, 400.0)
        .color(1.0, 0.0, 0.0)
        .layer(1);

    shape_renderer
        .oval()
        .scale(300.0, 300.0)
        .color(0.0, 1.0, 0.0)
        .layer(4);

    shape_renderer
        .rect()
        .scale(200.0, 200.0)
        .color(0.0, 0.0, 1.0)
        .layer(30);

    shape_renderer
        .oval()
        .scale(100.0, 100.0)
        .color(1.0, 0.0, 1.0)
        .layer(100);

    shape_renderer
        .image(0)
        .scale(200.0, 200.0)
        .layer(105)
        .rotation(PI / 4.0);

    shape_renderer
        .image(1)
        .pos(300.0, 0.0)
        .scale(200.0, 200.0)
        .layer(105);

    shape_renderer
        .image(0)
        .rotation(-PI / 2.0)
        .pos(-300.0, 0.0)
        .scale(200.0, 200.0)
        .layer(110);

    shape_renderer.render(&mut encoder, &texture_view, &data.device);

    data.queue.submit(once(encoder.finish()));
}

fn init(data: &AppData, state: &mut State, _: &mut Vec<RenderPipeline>) {
    state.shape_renderer = Some(ShapeRenderer::new(&data.device, &data.config));
    state
        .shape_renderer
        .as_mut()
        .unwrap()
        .add_textures_from_bytes(
            &vec![include_bytes!("img.png"), include_bytes!("img2.png")],
            &data.device,
            &data.queue,
        );
}

fn resize(data: &AppData, state: &mut State, size: &PhysicalSize<u32>) {
    state
        .shape_renderer
        .as_mut()
        .unwrap()
        .set_frame_size((size.width as f32, size.height as f32))
        .resize(&data.device, &data.config);
}

fn event(_app_data: &AppData, app_state: &mut State, window_event: &WindowEvent) {
    match window_event {
        WindowEvent::CursorMoved { position, .. } => {
            if app_state.dragging {
                let renderer = app_state.shape_renderer.as_mut().unwrap();

                let mut offset = renderer.frame_offset();

                if app_state.last_drag_pos != (-1.0, -1.0) {
                    offset.0 -= app_state.last_drag_pos.0 - position.x as f32;
                    offset.1 += app_state.last_drag_pos.1 - position.y as f32;
                }

                renderer.set_frame_offset(offset);
                app_state.last_drag_pos = (position.x as f32, position.y as f32);
            }
        }
        WindowEvent::MouseInput { state, button, .. } => {
            if button != &MouseButton::Left {
                return;
            }
            app_state.dragging = state == &ElementState::Pressed;
            app_state.last_drag_pos = (-1.0, -1.0);
        }
        _ => {}
    }
}