/**** 
* 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 && worldGrid.walls[checkX] && 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 && worldGrid.walls[checkX] && 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);
	// Column-based rendering for continuous walls
	self.wallColumns = [];
	self.numColumns = 256; // Reduced for better performance
	self.zBuffer = []; // Z-buffer for depth testing
	// Initialize wall columns
	self.initColumns = function () {
		for (var i = 0; i < self.numColumns; i++) {
			var wallCol = self.addChild(LK.getAsset('wall', {
				anchorX: 0.5,
				anchorY: 0.5
			}));
			wallCol.x = i * (2048 / self.numColumns); // Evenly distribute across screen width
			wallCol.y = 1366; // Screen center
			wallCol.visible = false;
			self.wallColumns.push(wallCol);
			self.zBuffer.push(1000); // Initialize z-buffer
		}
	};
	// Render walls using column-based raycasting for continuous appearance
	self.render = function (player) {
		// Initialize columns if not done
		if (self.wallColumns.length === 0) {
			self.initColumns();
		}
		var fov = Math.PI / 3; // 60 degrees field of view
		var halfFov = fov / 2;
		var screenCenter = 1366; // Y center of screen
		var pitchOffset = player.pitch * 400; // Apply pitch for vertical look
		// Define fixed texture center point that walls should "look at"
		var textureCenterX = worldGrid.cellSize * 10; // Center of the world grid
		var textureCenterY = worldGrid.cellSize * 10;
		// Reset z-buffer for this frame
		for (var k = 0; k < self.numColumns; k++) {
			self.zBuffer[k] = 1000;
		}
		// Cast rays for each column to create continuous walls
		for (var i = 0; i < self.numColumns; i++) {
			var rayAngle = player.angle - halfFov + i / self.numColumns * fov;
			var rayData = self.castRayForWall(player.x, player.y, rayAngle);
			if (rayData.hit) {
				var distance = rayData.distance;
				// Apply fish-eye correction for straight walls
				var correctedDistance = distance * Math.cos(rayAngle - player.angle);
				// Calculate square wall height based on distance
				var baseWallSize = worldGrid.cellSize; // Use grid cell size for square proportions
				var wallHeight = Math.max(50, baseWallSize * (600 / (correctedDistance + 100)));
				// Position wall column
				var wallCol = self.wallColumns[i];
				wallCol.height = wallHeight;
				wallCol.width = 2048 / self.numColumns + 2; // Slight overlap to prevent gaps
				wallCol.y = screenCenter + pitchOffset; // Apply pitch offset
				wallCol.visible = true;
				// Calculate texture coordinates based on distance from fixed center point
				var hitX = rayData.hitX;
				var hitY = rayData.hitY;
				var distanceFromCenter = Math.sqrt(Math.pow(hitX - textureCenterX, 2) + Math.pow(hitY - textureCenterY, 2));
				// Calculate angle from hit point to texture center
				var angleToCenter = Math.atan2(textureCenterY - hitY, textureCenterX - hitX);
				// Use this angle to determine texture offset/rotation
				var textureRotation = angleToCenter + Math.PI / 2; // Add 90 degrees for proper orientation
				wallCol.rotation = textureRotation;
				// Apply texture scaling based on distance from center for perspective effect
				var textureScale = Math.max(0.5, 1.0 - distanceFromCenter / (worldGrid.cellSize * 15));
				wallCol.scaleX = textureScale;
				// Apply distance-based shading for depth
				var shadingFactor = Math.max(0.3, 1.0 - correctedDistance / 800);
				var tintValue = Math.floor(shadingFactor * 255);
				wallCol.tint = tintValue << 16 | tintValue << 8 | tintValue;
				wallCol.alpha = Math.max(0.6, shadingFactor);
				// Store distance in z-buffer
				self.zBuffer[i] = correctedDistance;
			} else {
				// No wall hit - hide column
				self.wallColumns[i].visible = false;
			}
		}
	};
	// Optimized raycasting specifically for wall rendering
	self.castRayForWall = function (startX, startY, angle) {
		var rayX = startX;
		var rayY = startY;
		var deltaX = Math.cos(angle) * 4; // Larger steps for performance
		var deltaY = Math.sin(angle) * 4;
		var distance = 0;
		var maxDistance = 800;
		var stepSize = 4;
		// Raycast until wall hit or max distance
		while (distance < maxDistance) {
			rayX += deltaX;
			rayY += deltaY;
			distance += stepSize;
			// Check for wall collision
			if (worldGrid.hasWallAt(rayX, rayY)) {
				// Fine-tune hit point for better alignment
				var gridX = Math.floor(rayX / worldGrid.cellSize);
				var gridY = Math.floor(rayY / worldGrid.cellSize);
				var alignedHitX = gridX * worldGrid.cellSize + worldGrid.cellSize / 2;
				var alignedHitY = gridY * worldGrid.cellSize + worldGrid.cellSize / 2;
				return {
					hit: true,
					distance: distance,
					hitX: alignedHitX,
					hitY: alignedHitY
				};
			}
		}
		return {
			hit: false,
			distance: maxDistance,
			hitX: rayX,
			hitY: rayY
		};
	};
	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() {
		// Initialize walls array first
		this.walls = [];
		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) - optimized
	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);
		// Quick bounds check first
		if (gridX < 1 || gridX >= this.width - 1 || gridY < 1 || gridY >= this.height - 1) {
			return true; // Near or outside bounds = collision
		}
		// Optimized collision check - only check center and edges that matter for movement
		var checkPoints = [
		// Center point
		{
			x: worldX,
			y: worldY
		},
		// Movement-relevant edges
		{
			x: worldX - radius,
			y: worldY
		},
		// Left edge
		{
			x: worldX + radius,
			y: worldY
		},
		// Right edge  
		{
			x: worldX,
			y: worldY - radius
		},
		// Top edge
		{
			x: worldX,
			y: worldY + radius
		} // Bottom edge
		];
		for (var i = 0; i < checkPoints.length; i++) {
			var point = checkPoints[i];
			var pointGridX = Math.floor(point.x / this.cellSize);
			var pointGridY = Math.floor(point.y / this.cellSize);
			// Quick bounds check
			if (pointGridX < 0 || pointGridX >= this.width || pointGridY < 0 || pointGridY >= this.height) {
				return true;
			}
			// Check wall collision with early exit
			if (this.walls[pointGridX][pointGridY]) {
				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);
// 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
@@ -509,8 +509,11 @@
 		var fov = Math.PI / 3; // 60 degrees field of view
 		var halfFov = fov / 2;
 		var screenCenter = 1366; // Y center of screen
 		var pitchOffset = player.pitch * 400; // Apply pitch for vertical look
+		// Define fixed texture center point that walls should "look at"
+		var textureCenterX = worldGrid.cellSize * 10; // Center of the world grid
+		var textureCenterY = worldGrid.cellSize * 10;
 		// Reset z-buffer for this frame
 		for (var k = 0; k < self.numColumns; k++) {
 			self.zBuffer[k] = 1000;
 		}
@@ -530,8 +533,20 @@
 				wallCol.height = wallHeight;
 				wallCol.width = 2048 / self.numColumns + 2; // Slight overlap to prevent gaps
 				wallCol.y = screenCenter + pitchOffset; // Apply pitch offset
 				wallCol.visible = true;
+				// Calculate texture coordinates based on distance from fixed center point
+				var hitX = rayData.hitX;
+				var hitY = rayData.hitY;
+				var distanceFromCenter = Math.sqrt(Math.pow(hitX - textureCenterX, 2) + Math.pow(hitY - textureCenterY, 2));
+				// Calculate angle from hit point to texture center
+				var angleToCenter = Math.atan2(textureCenterY - hitY, textureCenterX - hitX);
+				// Use this angle to determine texture offset/rotation
+				var textureRotation = angleToCenter + Math.PI / 2; // Add 90 degrees for proper orientation
+				wallCol.rotation = textureRotation;
+				// Apply texture scaling based on distance from center for perspective effect
+				var textureScale = Math.max(0.5, 1.0 - distanceFromCenter / (worldGrid.cellSize * 15));
+				wallCol.scaleX = textureScale;
 				// Apply distance-based shading for depth
 				var shadingFactor = Math.max(0.3, 1.0 - correctedDistance / 800);
 				var tintValue = Math.floor(shadingFactor * 255);
 				wallCol.tint = tintValue << 16 | tintValue << 8 | tintValue;