124 lines
4.0 KiB
Python
124 lines
4.0 KiB
Python
import struct
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import sys
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import os
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import json
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from args import args
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from assetcache import assetCache, assetGetCache
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from assethelpers import getAssetRelativePath
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CHUNK_WIDTH = 16
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CHUNK_HEIGHT = 16
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CHUNK_DEPTH = 32
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CHUNK_TILE_COUNT = CHUNK_WIDTH * CHUNK_HEIGHT * CHUNK_DEPTH
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TILE_SIZE = 16.0
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def createQuadForTile(model, tileIndex, x=0, y=0, z=0):
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# Only append vertices if z == 0
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if z != 0:
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return
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# Determine color for checkerboard pattern
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color = (255,255,255) if (x + y) % 2 == 0 else (0,0,0)
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# Use TILE_SIZE for positions
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px = x * TILE_SIZE
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py = y * TILE_SIZE
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pz = z * TILE_SIZE
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quad_vertices = [
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{'position': (px, py, pz), 'color': color, 'uv': (0,0)}, # 0,0
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{'position': (px + TILE_SIZE, py, pz), 'color': color, 'uv': (1,0)}, # 1,0
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{'position': (px + TILE_SIZE, py + TILE_SIZE, pz), 'color': color, 'uv': (1,1)}, # 1,1
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{'position': (px, py, pz), 'color': color, 'uv': (0,0)}, # 0,0 (repeat)
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{'position': (px + TILE_SIZE, py + TILE_SIZE, pz), 'color': color, 'uv': (1,1)}, # 1,1 (repeat)
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{'position': (px, py + TILE_SIZE, pz), 'color': color, 'uv': (0,1)} # 0,1
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]
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base = len(model['vertices'])
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quad_indices = [base, base+1, base+2, base+3, base+4, base+5]
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model['vertices'].extend(quad_vertices)
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model['indices'].extend(quad_indices)
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model['vertexCount'] = len(model['vertices'])
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model['indexCount'] = len(model['indices'])
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def processMap(asset):
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cache = assetGetCache(asset['path'])
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if cache is not None:
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return cache
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# Read input file as JSON
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with open(asset['path'], 'r') as f:
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inData = json.load(f)
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tileIndexes = inData['tiles']
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# Create output object 'map' with default tile indexes and models array
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map = {
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'tiles': [0] * CHUNK_TILE_COUNT,
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'models': []
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}
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# Create a simple 3D model object
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model = {
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'vertices': [],
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'indices': [],
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'vertexCount': 0,
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'indexCount': 0
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}
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# Append the model to map.models
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map['models'].append(model)
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for i, tile in enumerate(tileIndexes):
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# Calculate x, y, z from i
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x = i % CHUNK_WIDTH
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y = (i // CHUNK_WIDTH) % CHUNK_HEIGHT
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z = i // (CHUNK_WIDTH * CHUNK_HEIGHT)
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createQuadForTile(model, tile, x, y, z)
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# Generate binary buffer for efficient output
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buffer = bytearray()
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buffer.extend(b'DMF')# Header
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buffer.extend(len(map['tiles']).to_bytes(4, 'little')) # Number of tiles
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buffer.extend(len(map['models']).to_bytes(1, 'little')) # Number of models
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# Buffer tile data as array of uint8_t
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for tileIndex in map['tiles']:
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buffer.append(tileIndex.to_bytes(1, 'little')[0])
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# For each model
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for model in map['models']:
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# Write vertex count and index count
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buffer.extend(model['vertexCount'].to_bytes(4, 'little'))
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# buffer.extend(model['indexCount'].to_bytes(4, 'little'))
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# For each vertex
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for vertex in model['vertices']:
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# This is not tightly packed in memory.
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# R G B A U V X Y Z
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# Color is 4 bytes (RGBA)
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# Rest is floats
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r, g, b = vertex['color']
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a = 255
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buffer.extend(r.to_bytes(1, 'little'))
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buffer.extend(g.to_bytes(1, 'little'))
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buffer.extend(b.to_bytes(1, 'little'))
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buffer.extend(a.to_bytes(1, 'little'))
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u, v = vertex['uv']
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buffer.extend(bytearray(struct.pack('<f', u)))
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buffer.extend(bytearray(struct.pack('<f', v)))
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x, y, z = vertex['position']
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buffer.extend(bytearray(struct.pack('<f', x)))
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buffer.extend(bytearray(struct.pack('<f', y)))
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buffer.extend(bytearray(struct.pack('<f', z)))
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# Write out map file
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relative = getAssetRelativePath(asset['path'])
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fileNameWithoutExt = os.path.splitext(os.path.basename(asset['path']))[0]
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outputFileRelative = os.path.join(os.path.dirname(relative), f"{fileNameWithoutExt}.dmf")
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outputFilePath = os.path.join(args.output_assets, outputFileRelative)
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os.makedirs(os.path.dirname(outputFilePath), exist_ok=True)
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with open(outputFilePath, "wb") as f:
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f.write(buffer)
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outMap = {
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'files': [ outputFilePath ],
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'map': map
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}
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return assetCache(asset['path'], outMap) |