Function main

draw/examples/bounce.rs:58–91

Bouncing ball example

()

/// Bouncing ball example
///
pub fn main() {
    // 'with_2d_graphics' is used to support operating systems that can't run event loops anywhere other than the main thread
    with_2d_graphics(|| {
        // Create a window with a canvas to draw on
        let canvas = create_drawing_window("Bouncing balls");

        // Generate some random balls
        let mut balls = (0..256).into_iter().map(|_| Ball::random()).collect::<Vec<_>>();

        // Animate them
        loop {
            // Update the balls for this frame
            for ball in balls.iter_mut() {
                ball.update();
            }

            // Render the frame
            canvas.draw(|gc| {
                gc.clear_canvas(Color::Rgba(0.6, 0.7, 0.8, 1.0));
                gc.canvas_height(1000.0);
                gc.center_region(0.0, 0.0, 1000.0, 1000.0);

                for ball in balls.iter() {
                    gc.circle(ball.x as f32, ball.y as f32, ball.radius as f32);
                    gc.fill_color(ball.col);
                    gc.fill();
                }
            });

            // Wait for the next frame
            thread::sleep(Duration::from_nanos(1_000_000_000 / 60));
        }
    });
}