92 lines
3 KiB
Rust
92 lines
3 KiB
Rust
use std::f64::consts::PI;
|
|
use instant::Instant;
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
use rayon::prelude::*;
|
|
use swbuf::GraphicsContext;
|
|
use winit::event::{Event, WindowEvent};
|
|
use winit::event_loop::{ControlFlow, EventLoop};
|
|
use winit::window::WindowBuilder;
|
|
|
|
fn main() {
|
|
let event_loop = EventLoop::new();
|
|
let window = WindowBuilder::new().build(&event_loop).unwrap();
|
|
|
|
#[cfg(target_arch = "wasm32")]
|
|
{
|
|
use winit::platform::web::WindowExtWebSys;
|
|
|
|
web_sys::window()
|
|
.unwrap()
|
|
.document()
|
|
.unwrap()
|
|
.body()
|
|
.unwrap()
|
|
.append_child(&window.canvas())
|
|
.unwrap();
|
|
}
|
|
|
|
let mut graphics_context = unsafe { GraphicsContext::new(&window, &window) }.unwrap();
|
|
|
|
let mut old_size = (0, 0);
|
|
let mut frames = pre_render_frames(0, 0);
|
|
|
|
let start = Instant::now();
|
|
event_loop.run(move |event, _, control_flow| {
|
|
*control_flow = ControlFlow::Poll;
|
|
|
|
match event {
|
|
Event::RedrawRequested(window_id) if window_id == window.id() => {
|
|
let elapsed = start.elapsed().as_secs_f64() % 1.0;
|
|
let (width, height) = {
|
|
let size = window.inner_size();
|
|
(size.width, size.height)
|
|
};
|
|
|
|
if (width, height) != old_size{
|
|
old_size = (width, height);
|
|
frames = pre_render_frames(width as usize, height as usize);
|
|
};
|
|
|
|
let buffer = &frames[((elapsed*60.0).round() as usize).clamp(0, 59)];
|
|
graphics_context.set_buffer(buffer.as_slice(), width as u16, height as u16);
|
|
}
|
|
Event::MainEventsCleared => {
|
|
window.request_redraw();
|
|
}
|
|
Event::WindowEvent {
|
|
event: WindowEvent::CloseRequested,
|
|
window_id,
|
|
} if window_id == window.id() => {
|
|
*control_flow = ControlFlow::Exit;
|
|
}
|
|
_ => {}
|
|
}
|
|
});
|
|
}
|
|
|
|
fn pre_render_frames(width: usize, height: usize) -> Vec<Vec<u32>>{
|
|
let render = |frame_id|{
|
|
let elapsed = ((frame_id as f64)/(60.0))*2.0*PI;
|
|
let buffer = (0..((width * height) as usize))
|
|
.map(|index| {
|
|
let y = ((index / (width as usize)) as f64)/(height as f64);
|
|
let x = ((index % (width as usize)) as f64)/(width as f64);
|
|
let red = ((((y + elapsed).sin()*0.5+0.5)*255.0).round() as u32).clamp(0, 255);
|
|
let green = ((((x + elapsed).sin()*0.5+0.5)*255.0).round() as u32).clamp(0, 255);
|
|
let blue = ((((y - elapsed).cos()*0.5+0.5)*255.0).round() as u32).clamp(0, 255);
|
|
|
|
let color = blue | (green << 8) | (red << 16);
|
|
|
|
color
|
|
})
|
|
.collect::<Vec<_>>();
|
|
|
|
buffer
|
|
};
|
|
|
|
#[cfg(target_arch = "wasm32")]
|
|
return (0..60).map(render).collect();
|
|
|
|
#[cfg(not(target_arch = "wasm32"))]
|
|
(0..60).into_par_iter().map(render).collect()
|
|
}
|