src/activities/house.rs

@@ -3,7 +3,7 @@ use comfy::*;
 #[derive(Debug, Default)]
 pub struct HouseState {
 	grid: Grid,
-	player: Player
+	player: Player,
 }
 
 #[derive(Debug)]
@@ -12,9 +12,12 @@ struct Grid {
 	connections: Vec<(usize, usize)>,
 }
 
-#[derive(Debug, Default)]
+#[derive(Debug)]
 struct Player {
-	position: Vec2
+	position: Vec2,
+	speed: f32,
+	connection: usize,
+	next_connections: Vec<usize>,
 }
 
 impl Default for Grid {
@@ -43,34 +46,50 @@ impl Grid {
 
 	fn sanitize(&mut self) {
 		let mut len = self.nodes.len();
-		let connections = self.connections.iter().filter(|(conn_i1, conn_i2)| {
-			if conn_i1 >= &mut len || conn_i2 >= &mut len{
-				error!("Connection in grid not possible {:?}", (conn_i1, conn_i2));
-				false
-			} else {
-				true
-			}
-		}).map(|(conn_i1, conn_i2)| (*conn_i1, *conn_i2)).collect();
+		let connections = self
+			.connections
+			.iter()
+			.filter(|(conn_i1, conn_i2)| {
+				if conn_i1 >= &mut len || conn_i2 >= &mut len {
+					error!("Connection in grid not possible {:?}", (conn_i1, conn_i2));
+					false
+				} else {
+					true
+				}
+			})
+			.map(|(conn_i1, conn_i2)| (*conn_i1, *conn_i2))
+			.collect();
 
 		self.connections = connections;
 	}
 }
 
+impl Default for Player {
+	fn default() -> Self {
+		Self {
+			position: Default::default(),
+			speed: 10.0,
+			connection: 0,
+			next_connections: vec![1, 2, 3],
+		}
+	}
+}
+
 pub fn draw(state: &crate::State, _engine: &comfy::EngineContext) {
 	//Draw Grid
-	for pos in &state.house.grid.nodes {
-		draw_circle(*pos, 0.25, BLUE, 0);
+	for node in &state.house.grid.nodes {
+		draw_circle(*node, 0.25, BLUE, 0);
 	}
 	for (conn_i1, conn_i2) in &state.house.grid.connections {
-		let p1 = state.house.grid.nodes.get(*conn_i1);
-		let p2 = state.house.grid.nodes.get(*conn_i2);
+		let node_1 = state.house.grid.nodes.get(*conn_i1);
+		let node_2 = state.house.grid.nodes.get(*conn_i2);
 
-		if p1.is_none() || p2.is_none() {
+		if node_1.is_none() || node_2.is_none() {
 			error!("Connection in grid not available {:?}", (conn_i1, conn_i2));
 			continue;
 		}
 
-		draw_line(*p1.unwrap(), *p2.unwrap(), 0.1, BLUE, 0);
+		draw_line(*node_1.unwrap(), *node_2.unwrap(), 0.1, BLUE, 0);
 	}
 
 	//Draw Player
@@ -78,20 +97,225 @@ pub fn draw(state: &crate::State, _engine: &comfy::EngineContext) {
 }
 
 pub fn update(state: &mut crate::State, _engine: &mut comfy::EngineContext) {
-	if is_key_down(KeyCode::Up) {
-		error!("KEY UPPPPPPPPP");
-		state.house.player.position += vec2(0.0, 1.0) * delta();
+	let player = &mut state.house.player;
+	let grid = &state.house.grid;
+
+	let (conn_i1, conn_i2) = grid.connections.get(player.connection).unwrap();
+	let node_1 = grid.nodes.get(*conn_i1).unwrap();
+	let node_2 = grid.nodes.get(*conn_i2).unwrap();
+
+	let range = 0.25;
+	let (
+		allow_up_movement,
+		allow_down_movement,
+		allow_left_movement,
+		allow_right_movement,
+	) = if in_node_range(&player.position, node_1, range)
+		|| in_node_range(&player.position, node_2, range)
+	{
+		(true, true, true, true)
+	} else {
+		let (
+			mut allow_up_movement,
+			mut allow_down_movement,
+			mut allow_left_movement,
+			mut allow_right_movement,
+		) = get_allowed_movement(&player.position, node_1, node_2);
+
+		for conn in &player.next_connections {
+			let (next_conn_i1, next_conn_i2) = grid.connections.get(*conn).unwrap();
+			let next_node_1 = grid.nodes.get(*next_conn_i1).unwrap();
+			let next_node_2 = grid.nodes.get(*next_conn_i2).unwrap();
+
+			let (
+				next_allow_up_movement,
+				next_allow_down_movement,
+				next_allow_left_movement,
+				next_allow_right_movement,
+			) = get_allowed_movement(&player.position, next_node_1, next_node_2);
+
+			(
+				allow_up_movement,
+				allow_down_movement,
+				allow_left_movement,
+				allow_right_movement,
+			) = (
+				allow_up_movement || next_allow_up_movement,
+				allow_down_movement || next_allow_down_movement,
+				allow_left_movement || next_allow_left_movement,
+				allow_right_movement || next_allow_right_movement,
+			);
+		}
+		(
+			allow_up_movement,
+			allow_down_movement,
+			allow_left_movement,
+			allow_right_movement,
+		)
+	};
+
+	if allow_up_movement && is_key_down(KeyCode::Up) {
+		player.position += vec2(0.0, player.speed) * delta();
 	}
 
-	if is_key_down(KeyCode::Down) {
-		state.house.player.position += vec2(0.0, -1.0) * delta();
+	if allow_down_movement && is_key_down(KeyCode::Down) {
+		player.position += vec2(0.0, -player.speed) * delta();
 	}
 
-	if is_key_down(KeyCode::Right) {
-		state.house.player.position += vec2(1.0, 0.0) * delta();
+	if allow_right_movement && is_key_down(KeyCode::Right) {
+		player.position += vec2(player.speed, 0.0) * delta();
 	}
 
-	if is_key_down(KeyCode::Left) {
-		state.house.player.position += vec2(-1.0, 0.0) * delta();
+	if allow_left_movement && is_key_down(KeyCode::Left) {
+		player.position += vec2(-player.speed, 0.0) * delta();
+	}
+
+	if !on_connection(&player.position, node_1, node_2) {
+
+		let mut changed = false;
+		for conn in &player.next_connections {
+			let (next_conn_i1, next_conn_i2) = grid.connections.get(*conn).unwrap();
+			let next_node_1 = grid.nodes.get(*next_conn_i1).unwrap();
+			let next_node_2 = grid.nodes.get(*next_conn_i2).unwrap();
+
+			if on_connection(&player.position, next_node_1, next_node_2) {
+				changed = true;
+
+				player.connection = *conn;
+				//Update next connections
+				let mut next_connections = Vec::new();
+				for (i, (poss_conn_i1, poss_conn_i2)) in
+					grid.connections.iter().enumerate()
+				{
+					if (next_conn_i1, next_conn_i2) != (poss_conn_i1, poss_conn_i2) {
+						if next_conn_i1 == poss_conn_i1
+							|| next_conn_i1 == poss_conn_i2
+							|| next_conn_i2 == poss_conn_i1
+							|| next_conn_i2 == poss_conn_i2
+						{
+							next_connections.push(i);
+						}
+					}
+				}
+				player.next_connections = next_connections;
+
+				break;
+			}
+		}
+
+		if !changed {
+			//Get closest node to snap to
+			let mut nodes = HashSet::new();
+			nodes.insert(conn_i1);
+			nodes.insert(conn_i2);
+			for conn in &player.next_connections {
+				let (next_conn_i1, next_conn_i2) = grid.connections.get(*conn).unwrap();
+
+				nodes.insert(next_conn_i1);
+				nodes.insert(next_conn_i2);
+			}
+
+			let mut closest_sqared_range = f32::MAX;
+			let mut closest_node = node_1;
+			for node_index in nodes {
+				let current_node = grid.nodes.get(*node_index).unwrap();
+				let current_squard_range = get_squared_node_range(&player.position, current_node);
+				if closest_sqared_range > current_squard_range {
+					closest_sqared_range = current_squard_range;
+					closest_node = current_node;
+				}
+			}
+
+			player.position = *closest_node;
+		}
 	}
 }
+
+//(UP, DOWN, LEFT, RIGHT)
+fn get_allowed_movement(
+	player_position: &Vec2,
+	node_1: &Vec2,
+	node_2: &Vec2,
+) -> (bool, bool, bool, bool) {
+	let allow_left_movement = {
+		if node_1.x <= node_2.x {
+			node_1.x < player_position.x
+				&& player_position.x <= node_2.x
+				&& player_position.y == node_1.y
+		} else {
+			node_2.x < player_position.x
+				&& player_position.x <= node_1.x
+				&& player_position.y == node_1.y
+		}
+	};
+
+	let allow_right_movement = {
+		if node_1.x <= node_2.x {
+			node_1.x <= player_position.x
+				&& player_position.x < node_2.x
+				&& player_position.y == node_1.y
+		} else {
+			node_2.x <= player_position.x
+				&& player_position.x < node_1.x
+				&& player_position.y == node_1.y
+		}
+	};
+
+	let allow_up_movement = {
+		if node_1.y <= node_2.y {
+			node_1.y <= player_position.y
+				&& player_position.y < node_2.y
+				&& player_position.x == node_1.x
+		} else {
+			node_2.y <= player_position.y
+				&& player_position.y < node_1.y
+				&& player_position.x == node_1.x
+		}
+	};
+
+	let allow_down_movement = {
+		if node_1.y <= node_2.y {
+			node_1.y < player_position.y
+				&& player_position.y <= node_2.y
+				&& player_position.x == node_1.x
+		} else {
+			node_2.y < player_position.y
+				&& player_position.y <= node_1.y
+				&& player_position.x == node_1.x
+		}
+	};
+
+	(
+		allow_up_movement,
+		allow_down_movement,
+		allow_left_movement,
+		allow_right_movement,
+	)
+}
+
+fn on_connection(player_position: &Vec2, node_1: &Vec2, node_2: &Vec2) -> bool {
+	let on_x = if node_1.x <= node_2.x {
+		node_1.x <= player_position.x && player_position.x <= node_2.x
+	} else {
+		node_2.x <= player_position.x && player_position.x <= node_1.x
+	};
+
+	let on_y = if node_1.y <= node_2.y {
+		node_1.y <= player_position.y && player_position.y <= node_2.y
+	} else {
+		node_2.y <= player_position.y && player_position.y <= node_1.y
+	};
+
+	on_x && on_y
+}
+
+fn in_node_range(player_position: &Vec2, node: &Vec2, range: f32) -> bool {
+	node.x - range <= player_position.x
+		&& player_position.x <= node.x + range
+		&& node.y - range <= player_position.y
+		&& player_position.y <= node.y + range
+}
+
+fn get_squared_node_range(player_position: &Vec2, node: &Vec2) -> f32 {
+	(player_position.x - node.x).abs() + (player_position.y - node.y).abs()
+}