#![no_std] #![no_main] extern crate alloc; use agb::{ display::{ example_logo, tiled::{RegularBackgroundSize, TileFormat}, window::WinIn, HEIGHT, WIDTH, }, fixnum::{Num, Rect, Vector2D}, interrupt::VBlank, }; use alloc::{boxed::Box, vec}; type FNum = Num; #[agb::entry] fn entry(mut gba: agb::Gba) -> ! { main(gba) } fn main(mut gba: agb::Gba) -> ! { let (gfx, mut vram) = gba.display.video.tiled0(); let mut map = gfx.background( agb::display::Priority::P0, RegularBackgroundSize::Background32x32, TileFormat::FourBpp, ); let mut window = gba.display.window.get(); window .win_in(WinIn::Win0) .set_background_enable(map.background(), true) .set_position(&Rect::new((10, 10).into(), (64, 64).into())) .enable(); let dmas = gba.dma.dma(); example_logo::display_logo(&mut map, &mut vram); let mut pos: Vector2D = (10, 10).into(); let mut velocity: Vector2D = Vector2D::new(1.into(), 1.into()); let vblank = VBlank::get(); let circle: Box<[_]> = (1..64i32) .map(|i| { let y = 32 - i; let x = (32 * 32 - y * y).isqrt(); let x1 = 32 - x; let x2 = 32 + x; ((x1 as u16) << 8) | (x2 as u16) }) .collect(); let mut circle_poses = vec![0; 160]; loop { pos += velocity; if pos.x.floor() > WIDTH - 64 || pos.x.floor() < 0 { velocity.x *= -1; } if pos.y.floor() > HEIGHT - 64 || pos.y.floor() < 0 { velocity.y *= -1; } let x_pos = pos.x.floor().max(0) as u16; let y_pos = pos.y.floor().max(0); let x_adjustment = (x_pos << 8) | x_pos; for (i, value) in circle_poses.iter_mut().enumerate() { let i = i as i32; if i <= y_pos || i >= y_pos + 64 { *value = 0; continue; } *value = circle[(i - y_pos) as usize - 1] + x_adjustment; } window .win_in(WinIn::Win0) .set_position(&Rect::new(pos.floor(), (64, 65).into())); window.commit(); let dma_controllable = window.win_in(WinIn::Win0).horizontal_position_dma(); let _transfer = unsafe { dmas.dma0.hblank_transfer(&dma_controllable, &circle_poses) }; vblank.wait_for_vblank(); } }

Example: dma_effect_circular_window