sand!!

petri/Cargo.toml

@@ -6,3 +6,4 @@ edition = "2021"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
+rand = "0.8.5"

petri/src/lib.rs

@@ -1,14 +1,202 @@
-pub fn add(left: usize, right: usize) -> usize {
-	left + right
+use rand::prelude::*;
+
+pub const CHUNK_SIZE: usize = 32;
+
+#[derive(Debug, Default, PartialEq, Clone)]
+pub struct Cell(u8, u8, u8);
+
+#[derive(Debug)]
+pub struct Pos2(i8, i8);
+
+#[derive(Debug)]
+pub struct Dish {
+	pub chunk: Chunk,
+	pub rules: Vec<Rule>,
 }
 
-#[cfg(test)]
-mod tests {
-	use super::*;
+#[derive(Debug)]
+pub struct Chunk {
+	pub contents: Box<[[Cell; CHUNK_SIZE]; CHUNK_SIZE]>,
+}
 
-	#[test]
-	fn it_works() {
-		let result = add(2, 2);
-		assert_eq!(result, 4);
+#[derive(Debug)]
+pub struct Rule {
+	pub from: RulePattern,
+	pub to: RulePattern,
+	// probability
+	// flip
+	// rotate
+}
+
+impl Chunk {
+	fn new() -> Self {
+		Self {
+			contents: vec![[Cell::EMPTY; CHUNK_SIZE]; CHUNK_SIZE]
+				.into_boxed_slice()
+				.try_into()
+				.unwrap(),
+		}
+	}
+
+	fn fill_random(mut self) -> Self {
+		for col in self.contents.iter_mut() {
+			for cell in col.iter_mut() {
+				if random::<u8>() % 4 == 0 {
+					*cell = Cell::WHITE;
+				}
+			}
+		}
+		self
+	}
+
+	fn get_cell(&self, x: usize, y: usize) -> Cell {
+		self.contents[x][y].clone()
+	}
+
+	fn set_cell(&mut self, x: usize, y: usize, cell: Cell) {
+		self.contents[x][y] = cell
+	}
+}
+
+impl Dish {
+	pub fn new() -> Self {
+		Self {
+			chunk: Chunk::new().fill_random(),
+			rules: vec![
+				Rule {
+					from: RulePattern {
+						width: 1,
+						height: 2,
+						contents: vec![Some(Cell::WHITE), Some(Cell::EMPTY)],
+					},
+					to: RulePattern {
+						width: 1,
+						height: 2,
+						contents: vec![Some(Cell::EMPTY), Some(Cell::WHITE)],
+					},
+				},
+				Rule {
+					from: RulePattern {
+						width: 2,
+						height: 2,
+						contents: vec![
+							Some(Cell::WHITE),
+							Some(Cell::EMPTY),
+							Some(Cell::WHITE),
+							Some(Cell::EMPTY),
+						],
+					},
+					to: RulePattern {
+						width: 2,
+						height: 2,
+						contents: vec![
+							Some(Cell::EMPTY),
+							Some(Cell::EMPTY),
+							Some(Cell::WHITE),
+							Some(Cell::WHITE),
+						],
+					},
+				},
+				Rule {
+					from: RulePattern {
+						width: 2,
+						height: 2,
+						contents: vec![
+							Some(Cell::EMPTY),
+							Some(Cell::WHITE),
+							Some(Cell::EMPTY),
+							Some(Cell::WHITE),
+						],
+					},
+					to: RulePattern {
+						width: 2,
+						height: 2,
+						contents: vec![
+							Some(Cell::EMPTY),
+							Some(Cell::EMPTY),
+							Some(Cell::WHITE),
+							Some(Cell::WHITE),
+						],
+					},
+				},
+			],
+		}
+	}
+
+	pub fn fire_blindly(&mut self) {
+		assert!(!self.rules.is_empty());
+		let x = random::<usize>() % CHUNK_SIZE;
+		let y = random::<usize>() % CHUNK_SIZE;
+		let rule = random::<usize>() % self.rules.len();
+		// let rule = &self.rules[rule];
+
+		self.fire_rule(rule, x, y);
+	}
+
+	fn fire_rule(&mut self, rule_index: usize, x: usize, y: usize) {
+		let rule = &self.rules[rule_index];
+		let width = rule.to.width;
+		let height = rule.to.height;
+		// check is match
+		for dx in 0..width {
+			for dy in 0..height {
+				let x = x + dx;
+				let y = y + dy;
+				if let Some(rule_cell) = rule.from.get(dx, dy) {
+					if self.get_cell(x, y) != Some(rule_cell) {
+						return;
+					}
+				}
+			}
+		}
+		for dx in 0..width {
+			for dy in 0..height {
+				let x = x + dx;
+				let y = y + dy;
+				if let Some(rule_cell) = &self.rules[rule_index].to.get(dx, dy) {
+					self.set_cell(x, y, rule_cell.clone());
+				}
+			}
+		}
+	}
+
+	//todo isize
+	pub fn get_cell(&self, x: usize, y: usize) -> Option<Cell> {
+		if x >= CHUNK_SIZE || y >= CHUNK_SIZE {
+			None
+		} else {
+			Some(self.chunk.get_cell(x, y))
+		}
+	}
+
+	//todo isize
+	pub fn set_cell(&mut self, x: usize, y: usize, cell: Cell) {
+		if x >= CHUNK_SIZE || y >= CHUNK_SIZE {
+			return;
+		}
+		self.chunk.set_cell(x, y, cell)
+	}
+}
+
+impl Cell {
+	pub const EMPTY: Self = Self(0, 0, 0);
+	pub const WHITE: Self = Self(255, 255, 255);
+}
+
+#[derive(Debug)]
+pub struct RulePattern {
+	width: usize,
+	height: usize,
+	contents: Vec<Option<Cell>>,
+}
+
+impl RulePattern {
+	fn get(&self, x: usize, y: usize) -> Option<Cell> {
+		if x >= self.width || y >= self.height {
+			None
+		} else {
+			// dbg!(x, y);
+			self.contents[x + self.width * y].clone()
+		}
 	}
 }