/**** 
* Plugins
****/ 
var tween = LK.import("@upit/tween.v1");
var storage = LK.import("@upit/storage.v1");

/**** 
* Classes
****/ 
var CeilingTileRenderer = Container.expand(function () {
	var self = Container.call(this);
	self.tiles = [];
	// Generate ceiling tiles in safe positions (away from corners and walls)
	self.generateTiles = function () {
		for (var x = 2; x < worldGrid.width - 2; x++) {
			for (var y = 2; y < worldGrid.height - 2; y++) {
				// Only place tiles in open areas (not near walls or corners)
				if (!worldGrid.hasWallAt(x * worldGrid.cellSize, y * worldGrid.cellSize) && !self.isNearCorner(x, y) && self.isSafePosition(x, y)) {
					var tile = {
						worldX: x * worldGrid.cellSize + worldGrid.cellSize / 2,
						worldY: y * worldGrid.cellSize + worldGrid.cellSize / 2,
						sprite: null
					};
					self.tiles.push(tile);
				}
			}
		}
	};
	// Check if position is near a corner
	self.isNearCorner = function (gridX, gridY) {
		// Check 3x3 area around position for wall density
		var wallCount = 0;
		for (var dx = -1; dx <= 1; dx++) {
			for (var dy = -1; dy <= 1; dy++) {
				var checkX = gridX + dx;
				var checkY = gridY + dy;
				if (checkX >= 0 && checkX < worldGrid.width && checkY >= 0 && checkY < worldGrid.height) {
					if (worldGrid.walls[checkX][checkY]) {
						wallCount++;
					}
				}
			}
		}
		return wallCount >= 3; // Near corner if 3+ walls nearby
	};
	// Check if position is safe (center of open areas)
	self.isSafePosition = function (gridX, gridY) {
		// Ensure there's open space in all 4 cardinal directions
		var directions = [{
			x: 0,
			y: -1
		}, {
			x: 1,
			y: 0
		}, {
			x: 0,
			y: 1
		}, {
			x: -1,
			y: 0
		}];
		for (var i = 0; i < directions.length; i++) {
			var checkX = gridX + directions[i].x;
			var checkY = gridY + directions[i].y;
			if (checkX >= 0 && checkX < worldGrid.width && checkY >= 0 && checkY < worldGrid.height) {
				if (worldGrid.walls[checkX][checkY]) {
					return false;
				}
			}
		}
		return true;
	};
	self.render = function (player) {
		// Clear existing sprites
		for (var i = 0; i < self.tiles.length; i++) {
			if (self.tiles[i].sprite) {
				self.tiles[i].sprite.visible = false;
			}
		}
		var visibleTiles = [];
		// Calculate which tiles are visible and their screen positions
		for (var i = 0; i < self.tiles.length; i++) {
			var tile = self.tiles[i];
			var dx = tile.worldX - player.x;
			var dy = tile.worldY - player.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			// Only render tiles within reasonable distance
			if (distance < 800) {
				// Calculate angle relative to player's view direction
				var tileAngle = Math.atan2(dy, dx);
				var angleDiff = tileAngle - player.angle;
				// Normalize angle difference
				while (angleDiff > Math.PI) angleDiff -= 2 * Math.PI;
				while (angleDiff < -Math.PI) angleDiff += 2 * Math.PI;
				// Check if tile is within field of view
				var fov = Math.PI / 3;
				if (Math.abs(angleDiff) < fov / 2) {
					// Calculate screen X position
					var screenX = 1024 + angleDiff / (fov / 2) * 1024;
					if (screenX >= 0 && screenX <= 2048) {
						// Apply pitch offset to ceiling tiles
						var pitchOffset = player.pitch * 400;
						visibleTiles.push({
							tile: tile,
							distance: distance,
							screenX: screenX,
							screenY: 400 - 200 * (1000 / (distance + 100)) + pitchOffset // Project to ceiling with pitch
						});
					}
				}
			}
		}
		// Sort by distance (farthest first)
		visibleTiles.sort(function (a, b) {
			return b.distance - a.distance;
		});
		// Render visible tiles
		for (var i = 0; i < visibleTiles.length; i++) {
			var visibleTile = visibleTiles[i];
			var tile = visibleTile.tile;
			if (!tile.sprite) {
				tile.sprite = self.addChild(LK.getAsset('ceilingTile', {
					anchorX: 0.5,
					anchorY: 0.5
				}));
			}
			tile.sprite.x = visibleTile.screenX;
			tile.sprite.y = visibleTile.screenY;
			tile.sprite.visible = true;
			// Scale based on distance
			var scale = Math.max(0.1, 20 / (visibleTile.distance + 20));
			tile.sprite.scaleX = scale;
			tile.sprite.scaleY = scale;
		}
	};
	return self;
});
var Player = Container.expand(function () {
	var self = Container.call(this);
	self.x = 1024;
	self.y = 1366;
	self.angle = 0;
	self.pitch = 0; // Vertical look angle (up/down)
	self.speed = 3;
	self.rotSpeed = 0.1;
	// Smooth interpolation properties
	self.targetX = 1024;
	self.targetY = 1366;
	self.targetAngle = 0;
	self.targetPitch = 0;
	self.smoothingFactor = 0.15;
	// Player visual for debugging (will be hidden in first person)
	var playerGraphics = self.attachAsset('player', {
		anchorX: 0.5,
		anchorY: 0.5
	});
	playerGraphics.visible = false; // Hide for first person view
	self.moveForward = function () {
		var newX = self.targetX + Math.cos(self.targetAngle) * self.speed;
		var newY = self.targetY + Math.sin(self.targetAngle) * self.speed;
		// Constrain Y coordinate to not go below 0
		if (newY < 0) {
			newY = 0;
		}
		// Check collision with world grid using improved collision detection
		if (!worldGrid.checkCollision(newX, newY)) {
			self.targetX = newX;
			self.targetY = newY;
		}
	};
	self.moveBackward = function () {
		var newX = self.targetX - Math.cos(self.targetAngle) * self.speed;
		var newY = self.targetY - Math.sin(self.targetAngle) * self.speed;
		// Constrain Y coordinate to not go below 0
		if (newY < 0) {
			newY = 0;
		}
		// Check collision with world grid using improved collision detection
		if (!worldGrid.checkCollision(newX, newY)) {
			self.targetX = newX;
			self.targetY = newY;
		}
	};
	self.turnLeft = function () {
		self.targetAngle -= self.rotSpeed;
	};
	self.turnRight = function () {
		self.targetAngle += self.rotSpeed;
	};
	self.lookUp = function () {
		self.targetPitch = Math.max(-Math.PI / 3, self.targetPitch - self.rotSpeed); // Limit to -60 degrees
	};
	self.lookDown = function () {
		self.targetPitch = Math.min(Math.PI / 3, self.targetPitch + self.rotSpeed); // Limit to +60 degrees
	};
	self.updateSmooth = function () {
		// Smooth interpolation for position
		self.x += (self.targetX - self.x) * self.smoothingFactor;
		self.y += (self.targetY - self.y) * self.smoothingFactor;
		// Smooth interpolation for rotation with angle wrapping
		var angleDiff = self.targetAngle - self.angle;
		// Handle angle wrapping (ensure shortest rotation path)
		if (angleDiff > Math.PI) angleDiff -= 2 * Math.PI;
		if (angleDiff < -Math.PI) angleDiff += 2 * Math.PI;
		self.angle += angleDiff * self.smoothingFactor;
		// Smooth interpolation for pitch
		var pitchDiff = self.targetPitch - self.pitch;
		self.pitch += pitchDiff * self.smoothingFactor;
	};
	return self;
});
var Renderer3D = Container.expand(function () {
	var self = Container.call(this);
	self.wallColumns = [];
	self.floorColumns = [];
	self.ceilingColumns = [];
	self.zBuffer = []; // Track depth for each column
	// Create pseudo-3D rendering columns
	for (var i = 0; i < 512; i++) {
		var wallCol = self.addChild(LK.getAsset('wall', {
			anchorX: 0.5,
			anchorY: 1.0
		}));
		wallCol.x = i * 4;
		wallCol.y = 1366;
		self.wallColumns.push(wallCol);
		var floorCol = self.addChild(LK.getAsset('piso', {
			anchorX: 0.5,
			anchorY: 0.5
		}));
		floorCol.x = i * 4;
		floorCol.y = 1366;
		self.floorColumns.push(floorCol);
		var ceilCol = self.addChild(LK.getAsset('ceilingStrip', {
			anchorX: 0.5,
			anchorY: 0.5
		}));
		ceilCol.x = i * 4;
		ceilCol.y = 700;
		self.ceilingColumns.push(ceilCol);
	}
	self.render = function (player) {
		var fov = Math.PI / 3; // 60 degrees field of view
		var halfFov = fov / 2;
		var screenHeight = 2732;
		var screenCenter = screenHeight / 2; // Center line at Y = 1366
		// Calculate pitch offset for vertical look
		var pitchOffset = player.pitch * 400; // Scale pitch to screen movement
		// Store column data for depth sorting
		var columnData = [];
		for (var i = 0; i < 512; i++) {
			var rayAngle = player.angle - halfFov + i / 512 * fov;
			var rayData = self.castRayWithCoords(player.x, player.y, rayAngle);
			var distance = rayData.distance;
			var hitX = rayData.hitX;
			var hitY = rayData.hitY;
			// Store column data with distance for sorting
			columnData.push({
				index: i,
				distance: distance,
				hitX: hitX,
				hitY: hitY,
				rayAngle: rayAngle
			});
		}
		// Sort columns by distance (farthest first for proper depth)
		columnData.sort(function (a, b) {
			return b.distance - a.distance;
		});
		// Initialize z-buffer for this frame
		for (var k = 0; k < 512; k++) {
			self.zBuffer[k] = 1000; // Start with maximum distance
		}
		// First pass: Update z-buffer with closest distances
		for (var j = 0; j < columnData.length; j++) {
			var data = columnData[j];
			var i = data.index;
			var distance = data.distance;
			// Only update z-buffer if this is closer
			if (distance < self.zBuffer[i]) {
				self.zBuffer[i] = distance;
			}
		}
		// Second pass: Render only if at closest distance
		for (var j = 0; j < columnData.length; j++) {
			var data = columnData[j];
			var i = data.index;
			var distance = data.distance;
			var hitX = data.hitX;
			var hitY = data.hitY;
			// Only render if this column is at the closest distance
			if (Math.abs(distance - self.zBuffer[i]) < 1) {
				// Calculate wall height to maintain square aspect ratio
				var baseWallSize = 400; // Base size for square walls
				var wallHeight = Math.max(100, baseWallSize * (1000 / (distance + 100)));
				var wallWidth = wallHeight; // Make it square
				var halfWallHeight = wallHeight / 2;
				// WALLS: Position in middle section (centered on screen) with pitch offset
				var wallTop = screenCenter - halfWallHeight + pitchOffset;
				var wallBottom = screenCenter + halfWallHeight + pitchOffset;
				self.wallColumns[i].height = wallHeight;
				self.wallColumns[i].width = wallWidth;
				self.wallColumns[i].y = wallBottom; // Anchor at bottom of wall
				self.wallColumns[i].visible = true;
				// Align wall columns to exact grid lines for straight wall appearance
				var gridX = Math.floor(hitX / worldGrid.cellSize);
				var gridY = Math.floor(hitY / worldGrid.cellSize);
				// Snap to exact grid boundaries to create straight walls
				var alignedX = gridX * worldGrid.cellSize;
				var alignedY = gridY * worldGrid.cellSize;
				// Position wall column at aligned grid position
				self.wallColumns[i].x = i * 4; // Keep screen column position
				// FLOOR: Bottom section (from wall bottom to screen bottom) with pitch offset
				var floorTop = wallBottom;
				var floorHeight = screenHeight - floorTop;
				self.floorColumns[i].y = floorTop + floorHeight / 2; // Center floor in bottom section
				self.floorColumns[i].height = Math.max(2, floorHeight);
				self.floorColumns[i].visible = true;
				// CEILING: Top section (from screen top to wall top) with pitch offset
				var ceilingHeight = wallTop;
				self.ceilingColumns[i].y = ceilingHeight / 2; // Center ceiling in top section
				self.ceilingColumns[i].height = Math.max(2, ceilingHeight);
				self.ceilingColumns[i].visible = true;
			} else {
				// Hide columns that are behind walls
				self.wallColumns[i].visible = false;
				self.floorColumns[i].visible = false;
				self.ceilingColumns[i].visible = false;
			}
		}
	};
	self.castRay = function (startX, startY, angle) {
		var rayData = self.castRayWithCoords(startX, startY, angle);
		return rayData.distance;
	};
	self.castRayWithCoords = function (startX, startY, angle) {
		var rayX = startX;
		var rayY = startY;
		var deltaX = Math.cos(angle) * 2;
		var deltaY = Math.sin(angle) * 2;
		var distance = 0;
		// Raycast using world coordinate system
		while (distance < 1000) {
			rayX += deltaX;
			rayY += deltaY;
			distance += 2;
			// Check for walls using world grid
			if (worldGrid.hasWallAt(rayX, rayY)) {
				break;
			}
		}
		// Align hit coordinates to grid boundaries for straight walls
		var gridX = Math.floor(rayX / worldGrid.cellSize);
		var gridY = Math.floor(rayY / worldGrid.cellSize);
		var alignedHitX = gridX * worldGrid.cellSize;
		var alignedHitY = gridY * worldGrid.cellSize;
		return {
			distance: distance,
			hitX: alignedHitX,
			hitY: alignedHitY
		};
	};
	return self;
});
var SensitivityConfig = Container.expand(function () {
	var self = Container.call(this);
	// Load saved sensitivity or default to 50
	self.sensitivity = storage.sensitivity || 50;
	self.isVisible = false;
	// Create background panel
	var background = self.addChild(LK.getAsset('untexturedArea', {
		anchorX: 0,
		anchorY: 0,
		width: 300,
		height: 200,
		alpha: 0.8
	}));
	background.tint = 0x222222;
	// Create title text
	var titleText = new Text2('Sensitivity', {
		size: 40,
		fill: 0xFFFFFF
	});
	titleText.anchor.set(0.5, 0);
	titleText.x = 150;
	titleText.y = 20;
	self.addChild(titleText);
	// Create sensitivity value text
	var valueText = new Text2(self.sensitivity.toString(), {
		size: 35,
		fill: 0xFFFFFF
	});
	valueText.anchor.set(0.5, 0);
	valueText.x = 150;
	valueText.y = 70;
	self.addChild(valueText);
	// Create decrease button (larger for mobile)
	var decreaseBtn = self.addChild(LK.getAsset('untexturedArea', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: 70,
		height: 60
	}));
	decreaseBtn.x = 80;
	decreaseBtn.y = 130;
	decreaseBtn.tint = 0x666666;
	var decreaseText = new Text2('-', {
		size: 40,
		fill: 0xFFFFFF
	});
	decreaseText.anchor.set(0.5, 0.5);
	decreaseText.x = 80;
	decreaseText.y = 130;
	self.addChild(decreaseText);
	// Create increase button (larger for mobile)
	var increaseBtn = self.addChild(LK.getAsset('untexturedArea', {
		anchorX: 0.5,
		anchorY: 0.5,
		width: 70,
		height: 60
	}));
	increaseBtn.x = 220;
	increaseBtn.y = 130;
	increaseBtn.tint = 0x666666;
	var increaseText = new Text2('+', {
		size: 40,
		fill: 0xFFFFFF
	});
	increaseText.anchor.set(0.5, 0.5);
	increaseText.x = 220;
	increaseText.y = 130;
	self.addChild(increaseText);
	// Update sensitivity display
	self.updateDisplay = function () {
		valueText.setText(self.sensitivity.toString());
		// Save to storage
		storage.sensitivity = self.sensitivity;
	};
	// Toggle visibility
	self.toggle = function () {
		self.isVisible = !self.isVisible;
		self.visible = self.isVisible;
	};
	// Handle decrease button with visual feedback
	decreaseBtn.down = function (x, y, obj) {
		decreaseBtn.tint = 0x888888; // Lighten on press
		if (self.sensitivity > 0) {
			self.sensitivity = Math.max(0, self.sensitivity - 5);
			self.updateDisplay();
		}
	};
	decreaseBtn.up = function (x, y, obj) {
		decreaseBtn.tint = 0x666666; // Reset color on release
	};
	// Handle increase button with visual feedback
	increaseBtn.down = function (x, y, obj) {
		increaseBtn.tint = 0x888888; // Lighten on press
		if (self.sensitivity < 100) {
			self.sensitivity = Math.min(100, self.sensitivity + 5);
			self.updateDisplay();
		}
	};
	increaseBtn.up = function (x, y, obj) {
		increaseBtn.tint = 0x666666; // Reset color on release
	};
	// Add background click handler to prevent game interactions
	background.down = function (x, y, obj) {
		// Prevent event from bubbling to game
		return true;
	};
	background.up = function (x, y, obj) {
		// Prevent event from bubbling to game
		return true;
	};
	background.move = function (x, y, obj) {
		// Prevent event from bubbling to game
		return true;
	};
	// Initially hidden
	self.visible = false;
	return self;
});
var WallRenderer = Container.expand(function () {
	var self = Container.call(this);
	self.wallSegments = [];
	// Generate wall segments based on world grid with limited quantity
	self.generateWalls = function () {
		// Clear existing walls
		for (var i = 0; i < self.wallSegments.length; i++) {
			if (self.wallSegments[i].sprite) {
				self.wallSegments[i].sprite.destroy();
			}
		}
		self.wallSegments = [];
		var processed = [];
		// Initialize processed grid
		for (var x = 0; x < worldGrid.width; x++) {
			processed[x] = [];
			for (var y = 0; y < worldGrid.height; y++) {
				processed[x][y] = false;
			}
		}
		// Find continuous wall segments with limit of 1 per line
		for (var x = 0; x < worldGrid.width; x++) {
			var horizontalWallsInRow = 0; // Limit horizontal walls per row
			for (var y = 0; y < worldGrid.height; y++) {
				if (worldGrid.walls[x][y] && !processed[x][y] && horizontalWallsInRow < 1) {
					// Try to create horizontal segment first
					var segmentEndX = x;
					while (segmentEndX < worldGrid.width && worldGrid.walls[segmentEndX][y] && !processed[segmentEndX][y]) {
						segmentEndX++;
					}
					// Create horizontal segment if it spans more than one cell
					if (segmentEndX - x > 1 && horizontalWallsInRow < 1) {
						var segmentCenterX = (x + segmentEndX - 1) / 2;
						var wallSegment = {
							startX: x,
							endX: segmentEndX - 1,
							startY: y,
							endY: y,
							worldX: segmentCenterX * worldGrid.cellSize + worldGrid.cellSize / 2,
							worldY: y * worldGrid.cellSize + worldGrid.cellSize / 2,
							centerX: segmentCenterX * worldGrid.cellSize + worldGrid.cellSize / 2,
							centerY: y * worldGrid.cellSize + worldGrid.cellSize / 2,
							width: (segmentEndX - x) * worldGrid.cellSize,
							height: worldGrid.cellSize,
							sprite: null,
							lastVisible: false
						};
						self.wallSegments.push(wallSegment);
						horizontalWallsInRow++;
						// Mark cells as processed
						for (var markX = x; markX < segmentEndX; markX++) {
							processed[markX][y] = true;
						}
					} else {
						// Try to create vertical segment
						var segmentEndY = y;
						while (segmentEndY < worldGrid.height && worldGrid.walls[x][segmentEndY] && !processed[x][segmentEndY]) {
							segmentEndY++;
						}
						// Create vertical segment if it spans more than one cell
						if (segmentEndY - y > 1 && horizontalWallsInRow < 1) {
							var segmentCenterY = (y + segmentEndY - 1) / 2;
							var wallSegment = {
								startX: x,
								endX: x,
								startY: y,
								endY: segmentEndY - 1,
								worldX: x * worldGrid.cellSize + worldGrid.cellSize / 2,
								worldY: segmentCenterY * worldGrid.cellSize + worldGrid.cellSize / 2,
								centerX: x * worldGrid.cellSize + worldGrid.cellSize / 2,
								centerY: segmentCenterY * worldGrid.cellSize + worldGrid.cellSize / 2,
								width: worldGrid.cellSize,
								height: (segmentEndY - y) * worldGrid.cellSize,
								sprite: null,
								lastVisible: false
							};
							self.wallSegments.push(wallSegment);
							horizontalWallsInRow++;
							// Mark cells as processed
							for (var markY = y; markY < segmentEndY; markY++) {
								processed[x][markY] = true;
							}
						} else if (horizontalWallsInRow < 1) {
							// Single cell wall
							var wallSegment = {
								startX: x,
								endX: x,
								startY: y,
								endY: y,
								worldX: x * worldGrid.cellSize + worldGrid.cellSize / 2,
								worldY: y * worldGrid.cellSize + worldGrid.cellSize / 2,
								centerX: x * worldGrid.cellSize + worldGrid.cellSize / 2,
								centerY: y * worldGrid.cellSize + worldGrid.cellSize / 2,
								width: worldGrid.cellSize,
								height: worldGrid.cellSize,
								sprite: null,
								lastVisible: false
							};
							self.wallSegments.push(wallSegment);
							horizontalWallsInRow++;
							processed[x][y] = true;
						}
					}
				}
			}
		}
	};
	// Render walls in 3D perspective with fixed center points
	self.render = function (player) {
		var fov = Math.PI / 3; // 60 degrees field of view
		var maxDistance = 1000;
		// Sort walls by distance for proper depth rendering
		var visibleWalls = [];
		for (var i = 0; i < self.wallSegments.length; i++) {
			var wall = self.wallSegments[i];
			var dx = wall.centerX - player.x;
			var dy = wall.centerY - player.y;
			var distance = Math.sqrt(dx * dx + dy * dy);
			// Only process walls within reasonable distance
			if (distance < maxDistance) {
				// Calculate angle relative to player's view direction using fixed center point
				var wallAngle = Math.atan2(dy, dx);
				var angleDiff = wallAngle - player.angle;
				// Normalize angle difference
				while (angleDiff > Math.PI) angleDiff -= 2 * Math.PI;
				while (angleDiff < -Math.PI) angleDiff += 2 * Math.PI;
				// Check if wall is within field of view (with some margin)
				if (Math.abs(angleDiff) < fov / 2 + 0.5) {
					visibleWalls.push({
						wall: wall,
						distance: distance,
						angleDiff: angleDiff
					});
				}
			}
			// Hide walls that are too far or out of view
			if (wall.sprite && (distance >= maxDistance || Math.abs(angleDiff) >= fov / 2 + 0.5)) {
				wall.sprite.visible = false;
				wall.lastVisible = false;
			}
		}
		// Sort visible walls by distance (farthest first)
		visibleWalls.sort(function (a, b) {
			return b.distance - a.distance;
		});
		// Limit to maximum 1 visible wall at once
		var maxVisibleWalls = Math.min(1, visibleWalls.length);
		// Render visible walls
		for (var i = 0; i < maxVisibleWalls; i++) {
			var visibleWall = visibleWalls[i];
			var wall = visibleWall.wall;
			var distance = visibleWall.distance;
			var angleDiff = visibleWall.angleDiff;
			// Create sprite if it doesn't exist
			if (!wall.sprite) {
				wall.sprite = self.addChild(LK.getAsset('wall', {
					anchorX: 0.5,
					anchorY: 0.5
				}));
			}
			// Calculate screen position
			var screenX = 1024 + angleDiff / (fov / 2) * 1024;
			var screenY = 1366; // Center height
			// Calculate size based on distance
			var baseSize = 200;
			var sizeScale = Math.max(0.1, 400 / (distance + 100));
			var wallWidth = Math.max(20, wall.width * sizeScale);
			var wallHeight = Math.max(20, wall.height * sizeScale);
			// Position and scale the wall sprite
			wall.sprite.x = screenX;
			wall.sprite.y = screenY;
			wall.sprite.width = wallWidth;
			wall.sprite.height = wallHeight;
			wall.sprite.visible = true;
			wall.lastVisible = true;
			// Add depth-based transparency
			var alpha = Math.max(0.3, 1.0 - distance / maxDistance);
			wall.sprite.alpha = alpha;
		}
		// Hide walls beyond the limit
		for (var i = maxVisibleWalls; i < visibleWalls.length; i++) {
			var hiddenWall = visibleWalls[i].wall;
			if (hiddenWall.sprite) {
				hiddenWall.sprite.visible = false;
				hiddenWall.lastVisible = false;
			}
		}
	};
	return self;
});

/**** 
* Initialize Game
****/ 
// Create player
var game = new LK.Game({
	backgroundColor: 0x000000
});

/**** 
* Game Code
****/ 
// World coordinate system - grid-based layout
var worldGrid = {
	cellSize: 200,
	width: 20,
	// 20x20 grid
	height: 20,
	walls: [],
	// Will store wall positions
	// Initialize world grid with walls
	initializeGrid: function initializeGrid() {
		for (var x = 0; x < this.width; x++) {
			this.walls[x] = [];
			for (var y = 0; y < this.height; y++) {
				// Create backrooms-style layout
				var isWall = false;
				// Outer boundaries are always walls
				if (x === 0 || x === this.width - 1 || y === 0 || y === this.height - 1) {
					isWall = true;
				}
				// Create maze-like structure typical of backrooms
				else if (x % 3 === 0 && y % 3 === 0 || x % 4 === 0 && y % 2 === 0 || y % 4 === 0 && x % 2 === 0) {
					isWall = true;
				}
				this.walls[x][y] = isWall;
			}
		}
	},
	// Check if a world position has a wall
	hasWallAt: function hasWallAt(worldX, worldY) {
		var gridX = Math.floor(worldX / this.cellSize);
		var gridY = Math.floor(worldY / this.cellSize);
		if (gridX < 0 || gridX >= this.width || gridY < 0 || gridY >= this.height) {
			return true; // Outside bounds = wall
		}
		return this.walls[gridX][gridY];
	},
	// Check collision with wall boundaries (with player radius)
	checkCollision: function checkCollision(worldX, worldY, radius) {
		radius = radius || 20; // Default player radius
		var gridX = Math.floor(worldX / this.cellSize);
		var gridY = Math.floor(worldY / this.cellSize);
		// Check the four corners of the player's bounding box
		var corners = [{
			x: worldX - radius,
			y: worldY - radius
		}, {
			x: worldX + radius,
			y: worldY - radius
		}, {
			x: worldX - radius,
			y: worldY + radius
		}, {
			x: worldX + radius,
			y: worldY + radius
		}];
		for (var i = 0; i < corners.length; i++) {
			var corner = corners[i];
			var cornerGridX = Math.floor(corner.x / this.cellSize);
			var cornerGridY = Math.floor(corner.y / this.cellSize);
			// Check bounds
			if (cornerGridX < 0 || cornerGridX >= this.width || cornerGridY < 0 || cornerGridY >= this.height) {
				return true;
			}
			// Check wall collision
			if (this.walls[cornerGridX][cornerGridY]) {
				return true;
			}
		}
		return false;
	},
	// Convert screen coordinates to world coordinates
	screenToWorld: function screenToWorld(screenX, screenY) {
		return {
			x: screenX,
			y: screenY
		};
	},
	// Convert world coordinates to screen coordinates
	worldToScreen: function worldToScreen(worldX, worldY) {
		return {
			x: worldX,
			y: worldY
		};
	}
};
// Initialize the world grid
worldGrid.initializeGrid();
// Add wall line completion system
worldGrid.completeWallLines = function () {
	// Trace horizontal lines and complete them
	for (var y = 0; y < this.height; y++) {
		var wallStart = -1;
		var wallEnd = -1;
		// Find wall segments in this row
		for (var x = 0; x < this.width; x++) {
			if (this.walls[x][y]) {
				if (wallStart === -1) {
					wallStart = x; // Start of wall segment
				}
				wallEnd = x; // Update end of wall segment
			} else {
				// If we found a wall segment, complete the line between start and end
				if (wallStart !== -1 && wallEnd !== -1 && wallEnd > wallStart) {
					for (var fillX = wallStart; fillX <= wallEnd; fillX++) {
						this.walls[fillX][y] = true; // Fill the gap
					}
				}
				wallStart = -1; // Reset for next segment
				wallEnd = -1;
			}
		}
		// Complete any remaining segment at end of row
		if (wallStart !== -1 && wallEnd !== -1 && wallEnd > wallStart) {
			for (var fillX = wallStart; fillX <= wallEnd; fillX++) {
				this.walls[fillX][y] = true;
			}
		}
	}
	// Trace vertical lines and complete them
	for (var x = 0; x < this.width; x++) {
		var wallStart = -1;
		var wallEnd = -1;
		// Find wall segments in this column
		for (var y = 0; y < this.height; y++) {
			if (this.walls[x][y]) {
				if (wallStart === -1) {
					wallStart = y; // Start of wall segment
				}
				wallEnd = y; // Update end of wall segment
			} else {
				// If we found a wall segment, complete the line between start and end
				if (wallStart !== -1 && wallEnd !== -1 && wallEnd > wallStart) {
					for (var fillY = wallStart; fillY <= wallEnd; fillY++) {
						this.walls[x][fillY] = true; // Fill the gap
					}
				}
				wallStart = -1; // Reset for next segment
				wallEnd = -1;
			}
		}
		// Complete any remaining segment at end of column
		if (wallStart !== -1 && wallEnd !== -1 && wallEnd > wallStart) {
			for (var fillY = wallStart; fillY <= wallEnd; fillY++) {
				this.walls[x][fillY] = true;
			}
		}
	}
};
// Apply wall line completion after initial generation
worldGrid.completeWallLines();
// Create wall renderer
var wallRenderer = new WallRenderer();
game.addChild(wallRenderer);
wallRenderer.generateWalls();
// Create ceiling tile renderer
var ceilingTileRenderer = new CeilingTileRenderer();
game.addChild(ceilingTileRenderer);
ceilingTileRenderer.generateTiles();
// Create player
var player = new Player();
// Position player at a valid starting location in the world grid
player.x = worldGrid.cellSize * 1.5; // Start in cell (1,1)
player.y = worldGrid.cellSize * 1.5;
game.addChild(player);
// Create 3D renderer
var renderer3D = new Renderer3D();
game.addChild(renderer3D);
// Create coordinate display text
var coordXText = new Text2('X: 0', {
	size: 60,
	fill: 0xFFFFFF
});
coordXText.anchor.set(0, 0);
coordXText.x = 120; // Avoid top-left 100x100 area
coordXText.y = 120;
LK.gui.addChild(coordXText);
var coordZText = new Text2('Z: 0', {
	size: 60,
	fill: 0xFFFFFF
});
coordZText.anchor.set(0, 0);
coordZText.x = 120; // Avoid top-left 100x100 area
coordZText.y = 200;
LK.gui.addChild(coordZText);
// Create settings button in top-right corner (larger for mobile)
var settingsButton = LK.getAsset('untexturedArea', {
	anchorX: 1,
	anchorY: 0,
	width: 120,
	height: 120
});
settingsButton.tint = 0x444444;
settingsButton.alpha = 0.7;
LK.gui.topRight.addChild(settingsButton);
var settingsText = new Text2('⚙', {
	size: 60,
	fill: 0xFFFFFF
});
settingsText.anchor.set(0.5, 0.5);
settingsText.x = -60;
settingsText.y = 60;
LK.gui.topRight.addChild(settingsText);
// Create sensitivity configuration panel
var sensitivityConfig = new SensitivityConfig();
sensitivityConfig.x = 2048 - 320;
sensitivityConfig.y = 100;
LK.gui.addChild(sensitivityConfig);
// Movement flags
var moveForward = false;
var moveBackward = false;
var turnLeft = false;
var turnRight = false;
var lookUp = false;
var lookDown = false;
// Touch controls for movement
var touchStartX = 0;
var touchStartY = 0;
var touchActive = false;
// Settings button click handler
settingsButton.down = function (x, y, obj) {
	sensitivityConfig.toggle();
};
game.down = function (x, y, obj) {
	touchStartX = x;
	touchStartY = y;
	touchActive = true;
	// Forward movement on touch
	moveForward = true;
};
game.up = function (x, y, obj) {
	touchActive = false;
	moveForward = false;
	moveBackward = false;
	turnLeft = false;
	turnRight = false;
	lookUp = false;
	lookDown = false;
};
game.move = function (x, y, obj) {
	if (!touchActive) return;
	var deltaX = x - touchStartX;
	var deltaY = y - touchStartY;
	// Horizontal movement for turning
	if (Math.abs(deltaX) > 50) {
		if (deltaX > 0) {
			turnRight = true;
			turnLeft = false;
		} else {
			turnLeft = true;
			turnRight = false;
		}
	} else {
		turnLeft = false;
		turnRight = false;
	}
	// Vertical movement - split between forward/backward and look up/down
	if (Math.abs(deltaY) > 50) {
		// If touch is in upper part of screen, use for looking up/down
		if (y < 1366) {
			// Upper half of screen for vertical look
			if (deltaY < 0) {
				lookUp = true;
				lookDown = false;
			} else {
				lookDown = true;
				lookUp = false;
			}
			moveForward = false;
			moveBackward = false;
		} else {
			// Lower half of screen for movement
			if (deltaY < 0) {
				moveForward = true;
				moveBackward = false;
			} else {
				moveBackward = true;
				moveForward = false;
			}
			lookUp = false;
			lookDown = false;
		}
	} else {
		lookUp = false;
		lookDown = false;
	}
};
game.update = function () {
	// Update player rotation speed based on sensitivity (0-100 maps to 0.05-0.2)
	var sensitivityValue = sensitivityConfig.sensitivity;
	player.rotSpeed = 0.05 + sensitivityValue / 100 * 0.15;
	// Handle movement
	if (moveForward) {
		player.moveForward();
	}
	if (moveBackward) {
		player.moveBackward();
	}
	if (turnLeft) {
		player.turnLeft();
	}
	if (turnRight) {
		player.turnRight();
	}
	if (lookUp) {
		player.lookUp();
	}
	if (lookDown) {
		player.lookDown();
	}
	// Apply smooth interpolation
	player.updateSmooth();
	// Render the pseudo-3D view
	renderer3D.render(player);
	// Render walls
	wallRenderer.render(player);
	// Render ceiling tiles
	ceilingTileRenderer.render(player);
	// Update coordinate display
	var gridX = Math.floor(player.x / worldGrid.cellSize);
	var gridZ = Math.floor(player.y / worldGrid.cellSize);
	coordXText.setText('X: ' + gridX);
	coordZText.setText('Z: ' + gridZ);
};

===================================================================
--- original.js
+++ change.js
@@ -97,13 +97,15 @@
 				if (Math.abs(angleDiff) < fov / 2) {
 					// Calculate screen X position
 					var screenX = 1024 + angleDiff / (fov / 2) * 1024;
 					if (screenX >= 0 && screenX <= 2048) {
+						// Apply pitch offset to ceiling tiles
+						var pitchOffset = player.pitch * 400;
 						visibleTiles.push({
 							tile: tile,
 							distance: distance,
 							screenX: screenX,
-							screenY: 400 - 200 * (1000 / (distance + 100)) // Project to ceiling
+							screenY: 400 - 200 * (1000 / (distance + 100)) + pitchOffset // Project to ceiling with pitch
 						});
 					}
 				}
 			}
@@ -137,14 +139,16 @@
 	var self = Container.call(this);
 	self.x = 1024;
 	self.y = 1366;
 	self.angle = 0;
+	self.pitch = 0; // Vertical look angle (up/down)
 	self.speed = 3;
 	self.rotSpeed = 0.1;
 	// Smooth interpolation properties
 	self.targetX = 1024;
 	self.targetY = 1366;
 	self.targetAngle = 0;
+	self.targetPitch = 0;
 	self.smoothingFactor = 0.15;
 	// Player visual for debugging (will be hidden in first person)
 	var playerGraphics = self.attachAsset('player', {
 		anchorX: 0.5,
@@ -182,8 +186,14 @@
 	};
 	self.turnRight = function () {
 		self.targetAngle += self.rotSpeed;
 	};
+	self.lookUp = function () {
+		self.targetPitch = Math.max(-Math.PI / 3, self.targetPitch - self.rotSpeed); // Limit to -60 degrees
+	};
+	self.lookDown = function () {
+		self.targetPitch = Math.min(Math.PI / 3, self.targetPitch + self.rotSpeed); // Limit to +60 degrees
+	};
 	self.updateSmooth = function () {
 		// Smooth interpolation for position
 		self.x += (self.targetX - self.x) * self.smoothingFactor;
 		self.y += (self.targetY - self.y) * self.smoothingFactor;
@@ -192,8 +202,11 @@
 		// Handle angle wrapping (ensure shortest rotation path)
 		if (angleDiff > Math.PI) angleDiff -= 2 * Math.PI;
 		if (angleDiff < -Math.PI) angleDiff += 2 * Math.PI;
 		self.angle += angleDiff * self.smoothingFactor;
+		// Smooth interpolation for pitch
+		var pitchDiff = self.targetPitch - self.pitch;
+		self.pitch += pitchDiff * self.smoothingFactor;
 	};
 	return self;
 });
 var Renderer3D = Container.expand(function () {
@@ -230,8 +243,10 @@
 		var fov = Math.PI / 3; // 60 degrees field of view
 		var halfFov = fov / 2;
 		var screenHeight = 2732;
 		var screenCenter = screenHeight / 2; // Center line at Y = 1366
+		// Calculate pitch offset for vertical look
+		var pitchOffset = player.pitch * 400; // Scale pitch to screen movement
 		// Store column data for depth sorting
 		var columnData = [];
 		for (var i = 0; i < 512; i++) {
 			var rayAngle = player.angle - halfFov + i / 512 * fov;
@@ -279,11 +294,11 @@
 				var baseWallSize = 400; // Base size for square walls
 				var wallHeight = Math.max(100, baseWallSize * (1000 / (distance + 100)));
 				var wallWidth = wallHeight; // Make it square
 				var halfWallHeight = wallHeight / 2;
-				// WALLS: Position in middle section (centered on screen)
-				var wallTop = screenCenter - halfWallHeight;
-				var wallBottom = screenCenter + halfWallHeight;
+				// WALLS: Position in middle section (centered on screen) with pitch offset
+				var wallTop = screenCenter - halfWallHeight + pitchOffset;
+				var wallBottom = screenCenter + halfWallHeight + pitchOffset;
 				self.wallColumns[i].height = wallHeight;
 				self.wallColumns[i].width = wallWidth;
 				self.wallColumns[i].y = wallBottom; // Anchor at bottom of wall
 				self.wallColumns[i].visible = true;
@@ -294,15 +309,15 @@
 				var alignedX = gridX * worldGrid.cellSize;
 				var alignedY = gridY * worldGrid.cellSize;
 				// Position wall column at aligned grid position
 				self.wallColumns[i].x = i * 4; // Keep screen column position
-				// FLOOR: Bottom section (from wall bottom to screen bottom)
+				// FLOOR: Bottom section (from wall bottom to screen bottom) with pitch offset
 				var floorTop = wallBottom;
 				var floorHeight = screenHeight - floorTop;
 				self.floorColumns[i].y = floorTop + floorHeight / 2; // Center floor in bottom section
 				self.floorColumns[i].height = Math.max(2, floorHeight);
 				self.floorColumns[i].visible = true;
-				// CEILING: Top section (from screen top to wall top)
+				// CEILING: Top section (from screen top to wall top) with pitch offset
 				var ceilingHeight = wallTop;
 				self.ceilingColumns[i].y = ceilingHeight / 2; // Center ceiling in top section
 				self.ceilingColumns[i].height = Math.max(2, ceilingHeight);
 				self.ceilingColumns[i].visible = true;
@@ -878,8 +893,10 @@
 var moveForward = false;
 var moveBackward = false;
 var turnLeft = false;
 var turnRight = false;
+var lookUp = false;
+var lookDown = false;
 // Touch controls for movement
 var touchStartX = 0;
 var touchStartY = 0;
 var touchActive = false;
@@ -899,8 +916,10 @@
 	moveForward = false;
 	moveBackward = false;
 	turnLeft = false;
 	turnRight = false;
+	lookUp = false;
+	lookDown = false;
 };
 game.move = function (x, y, obj) {
 	if (!touchActive) return;
 	var deltaX = x - touchStartX;
@@ -917,17 +936,37 @@
 	} else {
 		turnLeft = false;
 		turnRight = false;
 	}
-	// Vertical movement for forward/backward
+	// Vertical movement - split between forward/backward and look up/down
 	if (Math.abs(deltaY) > 50) {
-		if (deltaY < 0) {
-			moveForward = true;
+		// If touch is in upper part of screen, use for looking up/down
+		if (y < 1366) {
+			// Upper half of screen for vertical look
+			if (deltaY < 0) {
+				lookUp = true;
+				lookDown = false;
+			} else {
+				lookDown = true;
+				lookUp = false;
+			}
+			moveForward = false;
 			moveBackward = false;
 		} else {
-			moveBackward = true;
-			moveForward = false;
+			// Lower half of screen for movement
+			if (deltaY < 0) {
+				moveForward = true;
+				moveBackward = false;
+			} else {
+				moveBackward = true;
+				moveForward = false;
+			}
+			lookUp = false;
+			lookDown = false;
 		}
+	} else {
+		lookUp = false;
+		lookDown = false;
 	}
 };
 game.update = function () {
 	// Update player rotation speed based on sensitivity (0-100 maps to 0.05-0.2)
@@ -945,8 +984,14 @@
 	}
 	if (turnRight) {
 		player.turnRight();
 	}
+	if (lookUp) {
+		player.lookUp();
+	}
+	if (lookDown) {
+		player.lookDown();
+	}
 	// Apply smooth interpolation
 	player.updateSmooth();
 	// Render the pseudo-3D view
 	renderer3D.render(player);