vertex_arrays/
vertex-arrays.rs

1use sfml::{
2    graphics::{
3        vertex_array_bounds, Color, PrimitiveType, RectangleShape, RenderStates, RenderTarget,
4        RenderWindow, Shape, Vertex,
5    },
6    window::{Event, Style},
7    SfResult,
8};
9
10fn main() -> SfResult<()> {
11    let mut window = RenderWindow::new(
12        (800, 600),
13        "Vertex array example",
14        Style::CLOSE,
15        &Default::default(),
16    )?;
17    window.set_vertical_sync_enabled(true);
18
19    let mut vertex_array = [
20        Vertex::with_pos_color((20.0, 30.0).into(), Color::GREEN),
21        Vertex::with_pos_color((30.0, 30.0).into(), Color::GREEN),
22        Vertex::with_pos_color((40.0, 40.0).into(), Color::GREEN),
23        Vertex::with_pos_color((50.0, 50.0).into(), Color::GREEN),
24        Vertex::with_pos_color((60.0, 60.0).into(), Color::GREEN),
25        Vertex::with_pos_color((50.0, 80.0).into(), Color::GREEN),
26    ];
27
28    println!("\nIterate over the vertices of a vertex array");
29    for v in &vertex_array {
30        println!("Vertex Color: {:?} | Position: {:?}", v.color, v.position)
31    }
32
33    println!("\nMutable access to a vertex");
34    println!(
35        "Before Vertex Color: {:?} | Position: {:?}",
36        vertex_array[1].color, vertex_array[1].position
37    );
38    vertex_array[1].position.x = 100.0;
39    println!(
40        "After Vertex Color: {:?} | Position: {:?}",
41        vertex_array[1].color, vertex_array[1].position
42    );
43
44    println!("\nImmutable access to a vertex");
45    println!(
46        "Vertex Color: {:?} | Position: {:?}",
47        vertex_array[1].color, vertex_array[1].position
48    );
49
50    let vertex = &mut vertex_array[1];
51    println!(
52        "Before Vertex Color: {:?} | Position: {:?}",
53        vertex.color, vertex.position
54    );
55    vertex.position.x = 100.0;
56    println!(
57        "After Vertex Color: {:?} | Position: {:?}",
58        vertex.color, vertex.position
59    );
60
61    // Or:
62    vertex_array[1] = Vertex::with_pos((20., 40.).into());
63    println!("[2] After Vertex Position: {:?}", vertex_array[1].position);
64    println!(
65        "Vertex Color: {:?} | Position: {:?}",
66        vertex_array[1].color, vertex_array[1].position
67    );
68    let bounds = vertex_array_bounds(&vertex_array);
69    let mut bound_rect = RectangleShape::from_rect(bounds);
70    bound_rect.set_fill_color(Color::TRANSPARENT);
71    bound_rect.set_outline_thickness(1.0);
72    bound_rect.set_outline_color(Color::YELLOW);
73
74    'mainloop: loop {
75        while let Some(e) = window.poll_event() {
76            if e == Event::Closed {
77                break 'mainloop;
78            }
79        }
80        let rs = RenderStates::default();
81        // Clear the window
82        window.clear(Color::BLACK);
83        window.draw_primitives(&vertex_array, PrimitiveType::LINE_STRIP, &rs);
84        window.draw(&bound_rect);
85        // Display things on screen
86        window.display()
87    }
88    Ok(())
89}
vertex_arrays/vertex-arrays.rs

vertex_arrays/
vertex-arrays.rs
