Seperating mapcompile into files.

tools/mapcompile/layerParser.py

@@ -0,0 +1,144 @@
+import sys
+from constants import TILE_WIDTH_HEIGHT, CHUNK_WIDTH, CHUNK_HEIGHT
+import math
+
+def parseLayers(data):
+  parsed = {}
+
+  # Extract layers
+  parsed['layers'] = data['layers']
+
+  # Object layer
+  for layer in parsed['layers']:
+    if layer.get('type') == 'objectgroup':
+      parsed['objectLayer'] = layer
+      break
+
+  if parsed['objectLayer'] is None:
+    print(f"Error: Data does not contain an object layer.")
+    sys.exit(1)
+
+  if 'objects' not in parsed['objectLayer'] or not isinstance(parsed['objectLayer']['objects'], list):
+    print(f"Error: Object layer does not contain 'objects' key or it is not a list.")
+    sys.exit(1)
+
+  # Tile Layers
+  parsed['tileLayers'] = []
+  for layer in parsed['layers']:
+    if layer.get('type') == 'tilelayer':
+      parsed['tileLayers'].append(layer)
+
+  if len(parsed['tileLayers']) == 0:
+    print(f"Error: Data does not contain any tile layers.")
+    sys.exit(1)
+
+  # First layer
+  parsed['firstLayer'] = parsed['tileLayers'][0]
+  if 'width' not in parsed['firstLayer'] or 'height' not in parsed['firstLayer']:
+    print(f"Error: First layer does not contain 'width' or 'height' key.")
+    sys.exit(1)
+
+  if 'chunks' not in parsed['firstLayer'] or not isinstance(parsed['firstLayer']['chunks'], list):
+    print(f"Error: First layer does not contain 'chunks' key.")
+    sys.exit(1)
+
+  if len(parsed['firstLayer']['chunks']) == 0:
+    print(f"Error: First layer does not contain any chunks.")
+    sys.exit(1)
+
+  parsed['firstLayerFirstChunk'] = parsed['firstLayer']['chunks'][0]
+
+  # Now determine the input map bounds.
+  isMinXFound = False
+  isMaxXFound = False
+  isMinYFound = False
+  isMaxYFound = False
+  parsed['inputMapLowestX'] = 0
+  parsed['inputMapHighestX'] = 0
+  parsed['inputMapLowestY'] = 0
+  parsed['inputMapHighestY'] = 0
+  parsed['inputLayerWidthInTiles'] = parsed['firstLayerFirstChunk']['width']
+  parsed['inputLayerHeightInTiles'] = parsed['firstLayerFirstChunk']['height']
+
+  for chunk in parsed['firstLayer']['chunks']:
+    if 'x' not in chunk or 'y' not in chunk:
+      print(f"Error: Chunk in first layer does not contain 'x' or 'y' key.")
+      sys.exit(1)
+
+    # Check chunk is not empty
+    if 'data' not in chunk or not isinstance(chunk['data'], list):
+      print(f"Error: Chunk in first layer does not contain 'data' key or it is not a list.")
+      sys.exit(1)
+
+    if len(chunk['data']) != parsed['inputLayerWidthInTiles'] * parsed['inputLayerHeightInTiles']:
+      print(f"Error: Chunk in first layer does not contain the expected number of tiles.")
+      sys.exit(1)
+
+    chunkEmpty = True
+    for tile in chunk['data']:
+      if tile == 0:
+        continue
+      chunkEmpty = False
+      break
+
+    if chunkEmpty:
+      print(f"Warning: Chunk at ({chunk['x']}, {chunk['y']}) is empty, skipping.")
+      continue
+      
+    chunkX = chunk['x']
+    chunkY = chunk['y']
+
+    if parsed['inputMapLowestX'] > chunkX or not isMinXFound:
+      parsed['inputMapLowestX'] = chunkX
+      isMinXFound = True
+    if parsed['inputMapHighestX'] < chunkX or not isMaxXFound:
+      parsed['inputMapHighestX'] = chunkX
+      isMaxXFound = True
+
+    if parsed['inputMapLowestY'] > chunkY or not isMinYFound:
+      parsed['inputMapLowestY'] = chunkY
+      isMinYFound = True
+    if parsed['inputMapHighestY'] < chunkY or not isMaxYFound:
+      parsed['inputMapHighestY'] = chunkY
+      isMaxYFound = True
+
+  parsed['inputMapHighestX'] += parsed['inputLayerWidthInTiles']
+  parsed['inputMapHighestY'] += parsed['inputLayerHeightInTiles']
+
+  # We now offset all chunks by the lowest X/Y values to make them start at (0, 0).
+  for layerIndex, layer in enumerate(parsed['tileLayers']):
+    for chunkIndex, chunk in enumerate(layer['chunks']):
+      chunk['x'] -= parsed['inputMapLowestX']
+      chunk['y'] -= parsed['inputMapLowestY']
+      layer['chunks'][chunkIndex] = chunk
+
+    parsed['layers'][layerIndex] = layer
+
+  # Same for object layers
+  for obIndex, ob in enumerate(parsed['objectLayer']['objects']):
+    if 'x' not in ob or 'y' not in ob:
+      print(f"Error: Object in object layer does not contain 'x' or 'y' key.")
+      sys.exit(1)
+    
+    ob['x'] -= parsed['inputMapLowestX'] * TILE_WIDTH_HEIGHT
+    ob['y'] -= parsed['inputMapLowestY'] * TILE_WIDTH_HEIGHT
+
+    # Objects are bottom aligned in tiled, so we need to adjust the Y coordinate.
+    ob['y'] -= TILE_WIDTH_HEIGHT
+
+    # Round off the coordinates
+    ob['x'] = round(ob['x'])
+    ob['y'] = round(ob['y'])
+
+    parsed['objectLayer']['objects'][obIndex] = ob
+
+  parsed['mapWidthInTiles'] = parsed['inputMapHighestX'] - parsed['inputMapLowestX']
+  parsed['mapHeightInTiles'] = parsed['inputMapHighestY'] - parsed['inputMapLowestY']
+  parsed['mapWidthInRealChunks'] =  math.ceil(float(parsed['mapWidthInTiles']) / float(CHUNK_WIDTH))
+  parsed['mapHeightInRealChunks'] = math.ceil(float(parsed['mapHeightInTiles']) / float(CHUNK_HEIGHT))
+
+  if parsed['inputLayerWidthInTiles'] < CHUNK_WIDTH or parsed['inputLayerHeightInTiles'] < CHUNK_HEIGHT:
+    print(f"Error: Input layer size is smaller than chunk size.")
+    sys.exit(1)
+
+  return parsed