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js/utils.js

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+// Utility Functions
+const Utils = {
+    // Convert screen coordinates to world tile coordinates
+    screenToWorld(sx, sy, camera) {
+        return {
+            x: Math.floor((sx + camera.x) / (CONFIG.TILE_SIZE * camera.zoom)),
+            y: Math.floor((sy + camera.y) / (CONFIG.TILE_SIZE * camera.zoom))
+        };
+    },
+    
+    // Convert world tile coordinates to screen coordinates
+    worldToScreen(wx, wy, camera) {
+        return {
+            x: wx * CONFIG.TILE_SIZE * camera.zoom - camera.x,
+            y: wy * CONFIG.TILE_SIZE * camera.zoom - camera.y
+        };
+    },
+    
+    // Draw a rounded rectangle
+    drawRoundedRect(ctx, x, y, w, h, r) {
+        ctx.beginPath();
+        ctx.moveTo(x + r, y);
+        ctx.lineTo(x + w - r, y);
+        ctx.quadraticCurveTo(x + w, y, x + w, y + r);
+        ctx.lineTo(x + w, y + h - r);
+        ctx.quadraticCurveTo(x + w, y + h, x + w - r, y + h);
+        ctx.lineTo(x + r, y + h);
+        ctx.quadraticCurveTo(x, y + h, x, y + h - r);
+        ctx.lineTo(x, y + r);
+        ctx.quadraticCurveTo(x, y, x + r, y);
+        ctx.closePath();
+    },
+    
+    // Get building size from config
+    getBuildingSize(type) {
+        return CONFIG.BUILDING_SIZES[type] || { w: 1, h: 1 };
+    },
+    
+    // Deep clone an object
+    deepClone(obj) {
+        return JSON.parse(JSON.stringify(obj));
+    },
+    
+    // Format number with commas
+    formatNumber(num) {
+        return num.toLocaleString();
+    },
+    
+    // Clamp a value between min and max
+    clamp(value, min, max) {
+        return Math.max(min, Math.min(max, value));
+    },
+    
+    // Linear interpolation
+    lerp(a, b, t) {
+        return a + (b - a) * t;
+    },
+    
+    // Check if a point is within bounds
+    inBounds(x, y) {
+        return x >= 0 && x < CONFIG.MAP_WIDTH && y >= 0 && y < CONFIG.MAP_HEIGHT;
+    }
+};