Merge pull request 'feat: Setup SDL - 0002' (#3) from 0002 into master
Reviewed-on: #3
This commit is contained in:
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[package]
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name = "metagraphs_poc"
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version = "0.1.0"
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edition = "2018"
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# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
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[dependencies]
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sdl2 = "0.35.1"
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extern crate sdl2;
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mod render;
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use render::render;
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use sdl2::event::Event;
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use sdl2::keyboard::Keycode;
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use sdl2::pixels::PixelFormatEnum;
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use sdl2::surface::Surface;
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fn main() {
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let sdl_context = sdl2::init().unwrap();
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let video_subsystem = sdl_context.video().unwrap();
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let window = video_subsystem
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.window("metagraphs proof of concept", 800, 800)
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.position_centered()
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.opengl()
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.build()
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.unwrap();
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let mut canvas = window.into_canvas().build().unwrap();
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let texture_creator = canvas.texture_creator();
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let mut event_pump = sdl_context.event_pump().unwrap();
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let mut data = Box::new([255u8; 1_920_000]);
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let mut frame_count: u32 = 0;
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'running: loop {
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for event in event_pump.poll_iter() {
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match event {
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Event::Quit { .. }
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| Event::KeyDown {
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keycode: Some(Keycode::Escape),
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..
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} => break 'running,
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_ => {}
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}
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}
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render(&mut *data, frame_count);
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let surface =
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Surface::from_data(&mut *data, 800, 800, 2400, PixelFormatEnum::RGB24).unwrap();
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let texture = texture_creator
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.create_texture_from_surface(surface)
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.unwrap();
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canvas.copy(&texture, None, None).unwrap();
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canvas.present();
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frame_count += 1;
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}
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}
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use std::f64;
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use sdl2::pixels::Color;
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fn put_pixel(data: &mut [u8], x: usize, y: usize, color: Color) {
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data[y * 3 * 800 + x * 3] = color.r;
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data[y * 3 * 800 + x * 3 + 1] = color.g;
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data[y * 3 * 800 + x * 3 + 2] = color.b;
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}
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pub fn render(data: &mut [u8], frame_count: u32) {
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let time = frame_count as f64 / 60. * 6.28;
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let ct = f64::cos(time);
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let st = f64::sin(time);
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for x in 0..800 {
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for y in 0..800 {
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let cx: f64 = f64::cos(st * 1.0 + (x as f64 - 400.) / 39.123 * ct) + 1.;
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let cy: f64 = f64::cos(ct * 1.1 + (y as f64 - 400.) / 40.123 * st) + 1.;
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let sx: f64 = f64::sin(ct * 1.2 + (x as f64 - 400.) / 41.123 * ct) + 1.;
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let sy: f64 = f64::sin(st * 1.3 + (y as f64 - 400.) / 42.123 * st) + 1.;
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put_pixel(
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&mut *data,
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x,
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y,
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Color {
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r: (cx * 128.) as u8,
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g: (cy * sx * 64.) as u8,
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b: (sy * 128.) as u8,
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a: 0,
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},
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);
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}
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}
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}
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