Map Editor Tool

Overview

The Map Editor is a visual tool for designing buildings and placing objects in your Babylon.js game world. It uses a grid-based system where each cell represents 1 unit in the 3D world.

Location:

tools/map-editor.html

Access: Open directly in web browser - no server needed!

Getting Started

1. Open the Map Editor

Simply open

tools/map-editor.html

in your web browser:

# From your project root
open tools/map-editor.html
# or
firefox tools/map-editor.html
# or copy the full path and open in browser
/home/gianfiorenzo/Documents/Vs\ Code/babylon_fp/tools/map-editor.html

2. Using the Tools

Available Tools:

• 🧱 Wall - Create solid walls for buildings (2 units wide × 1 unit deep × 3 units tall)
• ⬜ Floor - Create floor tiles (thin, walkable)
• 🚪 Door - Create doorways (2 units wide × 1 unit deep × 2.2 units tall, interactive in-game)
• 🪟 Window - Create windows (2 units wide × 1 unit deep × 1.5 units tall)
• 👤 NPC Spawn - Mark NPC spawn points
• 🎮 Player Spawn - Mark player spawn points
• ❌ Erase - Remove tiles

How to Use:

1. Click a tool button to select it (it will highlight green)
2. Click on the grid to place tiles
3. Use the Rotation dropdown or press 'R' to rotate (0°, 90°, 180°, 270°)
4. Click on existing tiles with the Erase tool to remove them
5. Hover over the grid to see coordinates

3. Grid System

• Grid Size: 100x100 by default (adjustable)
• Cell Size: 1 unit per cell
• World Size: 100x100 units total
• Origin: Center of the grid is world position (0, 0, 0)

Coordinate Conversion:

• Grid (50, 50) = World (0, 0) (center)
• Grid (0, 0) = World (-50, -50) (top-left corner)
• Grid (100, 100) = World (50, 50) (bottom-right corner)

4. Visual Features

Cursor Preview 👁️

• Semi-transparent preview of the tile you're about to place
• Shows exactly what the tile will look like before clicking
• Preview follows your mouse cursor in real-time
• Changes instantly when you switch tools or rotation

Orientation Indicators 🧭

All rotatable items show a bright green line on their "front" edge:

Walls, Doors, Windows:

• 0° (Horizontal): Green line on bottom edge (facing south)
• 90° (Vertical): Green line on left edge (facing west)
• 180°: Green line on top edge (facing north)
• 270°: Green line on right edge (facing east)

NPC & Player Spawns:

• Default orientation facing south (down) with green line on bottom

Already-placed tiles show a darker green line (more subtle) to indicate their orientation.

Erase Tool Visual ❌

• Shows a red X under cursor when erase tool is selected
• Clear visual indication of what will be deleted

5. Building Types

Walls

• Default height: 3 units
• Blocks player movement
• Used for building exteriors and interiors
• Rotatable: 0°, 90°, 180°, 270°

Floors

• Thin tiles (0.1 units high)
• Create interior floors or platforms
• Collision enabled
• Walkable

Doors

• Height: 2.2 units
• Width: 1.0 units (can occupy 2 grid units with rotation)
• Can be made interactive with the DoorSystem
• Initially blocks movement in-game
• Rotatable for proper wall orientation

Windows

• Placed higher on walls (1.5 units from top)
• Semi-transparent
• Blocks movement (glass)
• Rotatable for proper wall orientation

Spawn Points

• Player Spawn: Where the player starts (only one per map)
• NPC Spawn: Where NPCs are placed (link to NPC id in JSON)
• Include

  npcId

  in the JSON to link to specific NPC data

Advanced Features

Drag Painting 🎨

• Left-click and drag to paint multiple tiles quickly
• Works with: Wall, Floor, Window, and Erase tools
• Perfect for creating large areas without clicking repeatedly
• Release mouse button to stop painting

NPC Schedule Editor 📅

• Automatically opens when you select/place an NPC
• Edit waypoint times, positions, and npc type
• Add, edit, or remove waypoints
• Time validation ensures consistent schedules
• Export/import preserves all schedule data

Map Import/Export

Exporting Your Map

Once you've designed your map:

1. Copy JSON: Copies the map data to your clipboard
2. Download JSON: Downloads as a

   .json

   file
3. Save the file to

   /public/data/maps/your_map_name.json

Importing Maps

1. Click Import JSON button
2. Select a

   .json

   file from your computer
3. Map and all schedule data are restored
4. Existing data is replaced

Rotation & Building Walls

Wall Placement

Horizontal Wall (0° or 180°)

Place walls at grid positions with X-spacing of 2:

Grid: (0,0) → (2,0) → (4,0) → (6,0)
World: x=-50, x=-48, x=-46, x=-44

Vertical Wall (90° or 270°)

Place walls at grid positions with Y-spacing of 2:

Grid: (0,0) → (0,2) → (0,4) → (0,6)
World: z=-50, z=-48, z=-46, z=-44

Creating Corners

Horizontal wall at (0,0) rotation=0°
Vertical wall at (0,0) rotation=90°
Creates an L-shaped corner

How Rotation Works

• 0°: Horizontal (default) - 2 units wide along X-axis, 1 unit deep along Z-axis
• 90°: Vertical - 1 unit wide along X-axis, 2 units deep along Z-axis
• 180°: Horizontal (flipped)
• 270°: Vertical (flipped)

Loading Maps in Game

To load your map in the game:

1. Save your JSON file to

   /public/data/maps/

2. In

   src/Game.ts

   , uncomment and modify the map loading line:

// In the init() method
await this.mapBuilder.loadMapFromFile('/data/maps/your_map_name.json');

Tips for Organization

Version Control

• Save maps as JSON files in

  /public/data/maps/

• Commit maps to git for team collaboration
• Use descriptive filenames

Map Organization

Create separate maps for different areas:

• town_center.json

  - Main plaza

• residential_01.json

  - House group 1

• bakery.json

  - Bakery building

• police_station.json

  - Police station

Naming Conventions

{area}_{building_type}_{variant}.json

Examples:
- downtown_shop_general.json
- downtown_shop_bakery.json
- residential_house_01.json
- plaza_fountain.json

Map Metadata

Include metadata in your maps:

{
  "metadata": {
    "gridSize": 100,
    "cellSize": 1,
    "worldSize": 100,
    "version": "1.0.0",
    "description": "Town bakery - single story building",
    "author": "Your Name",
    "created": "2025-10-15"
  },
  "tiles": [...],
  "spawns": [...],
  "schedules": [...]
}

JSON Structure

Complete Map Format

{
  "metadata": {
    "gridSize": 100,
    "cellSize": 1,
    "description": "Bakery"
  },
  "tiles": [
    {
      "gridX": 10,
      "gridY": 15,
      "type": "wall",
      "rotation": 0
    }
  ],
  "spawns": [
    {
      "gridX": 20,
      "gridY": 25,
      "type": "npcSpawn",
      "npcId": "baker"
    }
  ],
  "schedules": [
    {
      "npcId": "baker",
      "waypoints": [
        {"time": "06:00", "gridX": 20, "gridY": 25},
        {"time": "09:00", "gridX": 15, "gridY": 20}
      ]
    }
  ]
}

Advanced Usage

Multi-Story Buildings

To create multi-story buildings:

1. Create multiple floor plans as separate map files
2. Load them with different Y offsets in code
3. Or modify positions before building in code

Complex Structures

For complex buildings:

1. Start with the outer walls
2. Add interior walls to create rooms
3. Place floors
4. Add doors and windows
5. Mark spawn points for NPCs

Performance Tips

• Keep maps under 500 tiles for best performance
• Use floor tiles sparingly (they add geometry)
• Group related structures in separate map files
• Reuse maps with position offsets for similar buildings

Example Workflow

1. Sketch: Draw your building layout on paper
2. Design: Open map editor and create the structure
3. Place NPCs: Click NPC Spawn, edit schedule in modal
4. Export: Download JSON file
5. Save: Move to

   /public/data/maps/

6. Test: Load in game and walk through
7. Iterate: Adjust and refine
8. Commit: Save to version control

Troubleshooting

Map doesn't load in game:

• Check browser console for errors
• Verify JSON syntax is valid
• Ensure file path in Game.ts is correct
• Check the file exists in

  /public/data/maps/

Walls overlap or look wrong:

• Remember spacing: horizontal walls use X-spacing of 2, vertical use Y-spacing of 2
• Check grid coordinates vs world coordinates
• Verify rotation settings (green line should face outward)

Player gets stuck:

• Add doors where needed
• Check for overlapping collision geometry
• Verify spawn points are in valid, open locations

Schedule editor not showing:

• Make sure you've selected an NPC spawn point
• Click on the NPC spawn to select it
• The editor should appear automatically

Keyboard Shortcuts

• R

  - Rotate selected tool by 90°

• E

  - Select Erase tool

• D

  - Select Floor tool

• W

  - Select Wall tool

Development Commands

List all maps

ls -1 /home/gianfiorenzo/Documents/Vs\ Code/babylon_fp/public/data/maps/*.json

Validate map JSON

cd /home/gianfiorenzo/Documents/Vs\ Code/babylon_fp
for f in public/data/maps/*.json; do
  echo "Checking $f..."
  node -e "JSON.parse(require('fs').readFileSync('$f'))" && echo "✓ Valid"
done

Count buildings in a map

cd /home/gianfiorenzo/Documents/Vs\ Code/babylon_fp
cat public/data/maps/example.json | grep -c '"type"'

Future Enhancements

Planned features:

• Undo/Redo functionality
• Copy/Paste regions
• Prefab buildings (templates)
• Height adjustments
• Texture selection
• 3D preview panel
• Multi-map management
• Collision layer visualization