xevion/Pac-Man
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feat: speed modulation to implement precise speed decrease despite integers

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Xevion
2023-09-10 02:06:40 -05:00
parent b987599f10
commit 6ce3a5ce79
3 changed files with 49 additions and 16 deletions
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38
src/pacman.rs
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@@ -3,7 +3,10 @@ use sdl2::{
video::Window,
};
use crate::{animation::AnimatedTexture, direction::Direction, entity::Entity, constants::CELL_SIZE};
use crate::{
animation::AnimatedTexture, constants::CELL_SIZE, direction::Direction, entity::Entity,
modulation::SpeedModulator,
};
pub struct Pacman<'a> {
// Absolute position on the board (precise)
@@ -11,6 +14,7 @@ pub struct Pacman<'a> {
pub direction: Direction,
pub next_direction: Option<Direction>,
speed: u32,
modulation: SpeedModulator,
sprite: AnimatedTexture<'a>,
}
@@ -21,6 +25,7 @@ impl Pacman<'_> {
direction: Direction::Right,
next_direction: None,
speed: 2,
modulation: SpeedModulator::new(0.9333),
sprite: AnimatedTexture::new(atlas, 4, 3, 32, 32, Some((-4, -4))),
}
}
@@ -53,27 +58,28 @@ impl Entity for Pacman<'_> {
fn tick(&mut self) {
let can_change = self.internal_position() == (0, 0);
println!("{:?} ({:?})", self.internal_position(), can_change);
if can_change {
if let Some(direction) = self.next_direction {
self.direction = direction;
self.next_direction = None;
}
}
let speed = self.speed as i32;
match self.direction {
Direction::Right => {
self.position.0 += speed;
}
Direction::Left => {
self.position.0 -= speed;
}
Direction::Up => {
self.position.1 -= speed;
}
Direction::Down => {
self.position.1 += speed;
if self.modulation.next() {
let speed = self.speed as i32;
match self.direction {
Direction::Right => {
self.position.0 += speed;
}
Direction::Left => {
self.position.0 -= speed;
}
Direction::Up => {
self.position.1 -= speed;
}
Direction::Down => {
self.position.1 += speed;
}
}
}
}