141 lines
5.5 KiB
Python
141 lines
5.5 KiB
Python
"""
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This module attempts to parse the ``model.inc.c`` files and extract the
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3D models within as standard Wavefront OBJ files.
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Example:
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Specify the path to the ``.inc.c`` file and a directory where to save
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the extracted ``.obj`` files.
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$ python c2obj.py ./actors/mario/model.inc.c ./actors/mario/obj/
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This is a work in progress and it currently has some serious limitations:
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* It only extracts geometry information, so no textures or any other info
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* It makes assumptions about the layout of the code in the C source
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* It hasn't been properly tested.
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"""
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def parse(filename, output_directory):
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from os import path, mkdir
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if not path.isdir(output_directory):
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try:
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mkdir(output_directory)
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except OSError:
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print(f'Could not use output directory {output_directory}.')
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vtx_def = 'static const Vtx '
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vtx_data = {}
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reading_vtx = False
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current_vtx_name = ''
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current_vtx_data = []
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current_vtx_vertices = 0
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gfx_def = 'const Gfx '
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reading_gfx = False
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current_gfx_vertices = 0
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current_gfx_faces = 0
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insert_vert_call = 'gsSPVertex('
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insert_1tri_call = 'gsSP1Triangle('
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insert_2tri_call = 'gsSP2Triangles('
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gfx_count = 0
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end_of_block = '};'
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with open(filename, 'r') as f:
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for line in f:
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line = line.strip()
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if line.startswith(vtx_def):
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vtx_name = line.split(' ')[3][:-2]
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current_vtx_name = vtx_name
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current_vtx_data = []
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reading_vtx = True
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continue
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if line.startswith(gfx_def):
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from datetime import datetime
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current_gfx_name = line.split(' ')[2][:-2]
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current_gfx_file = open(path.join(output_directory, current_gfx_name + '.obj'), 'w')
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current_gfx_file.write("# Armando Arredondo's SM64 Wavefront OBJ Geometry Converter\n")
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current_gfx_file.write('# File Created: {}\n\n'.format(datetime.now()))
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reading_gfx = True
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continue
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if line == end_of_block:
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if reading_vtx:
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vtx_data[current_vtx_name] = current_vtx_data
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reading_vtx = False
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elif reading_gfx:
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current_gfx_file.write(f'# {current_gfx_faces} faces\n\n')
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current_gfx_file.close()
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current_gfx_vertices = 0
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reading_gfx = False
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gfx_count += 1
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continue
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if reading_vtx:
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line = line.replace('{', '[').replace('}', ']')
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tri = eval(line[:-1])[0]
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current_vtx_data.append(tri)
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continue
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if reading_gfx:
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if line.startswith(insert_vert_call):
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args = line[len(insert_vert_call):].split(',')
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current_vtx_name = args[0]
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if current_gfx_vertices > 0:
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current_gfx_file.write(f'# {current_gfx_faces} faces\n\n')
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current_gfx_faces = 0
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current_vtx_vertices = len(vtx_data[current_vtx_name])
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current_gfx_vertices += current_vtx_vertices
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current_gfx_file.write(f'#\n# object {current_vtx_name}\n#\n\n')
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current_vtx_data = vtx_data[current_vtx_name]
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for tri in current_vtx_data:
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v = tri[0]
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current_gfx_file.write('v {:.3f} {:.3f} {:.3f}\n'.format(*v))
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current_gfx_file.write(f'# {current_vtx_vertices} vertices\n\n')
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for tri in current_vtx_data:
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n = [_decode_normal(u) for u in tri[3][:3]]
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current_gfx_file.write('vn {:.3f} {:.3f} {:.3f}\n'.format(*n))
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current_gfx_file.write(f'# {current_vtx_vertices} vertex normals\n\n')
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current_gfx_file.write(f'g {current_vtx_name}\n\n')
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elif line.startswith(insert_2tri_call):
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args = line[len(insert_2tri_call):].split(',')
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correction = current_gfx_vertices - current_vtx_vertices + 1
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indexes = [eval(args[i]) + correction for i in [0, 1, 2, 4, 5, 6]]
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current_gfx_file.write('f {0}//{0} {1}//{1} {2}//{2}\n'.format(*indexes[:3]))
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current_gfx_file.write('f {0}//{0} {1}//{1} {2}//{2}\n'.format(*indexes[3:]))
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current_gfx_faces += 2
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elif line.startswith(insert_1tri_call):
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args = line[len(insert_1tri_call):].split(',')
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correction = current_gfx_vertices - current_vtx_vertices + 1
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indexes = [eval(args[i]) + correction for i in [0, 1, 2]]
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current_gfx_file.write('f {0}//{0} {1}//{1} {2}//{2}\n'.format(*indexes))
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current_gfx_faces += 1
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continue
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print(f'{gfx_count} models extracted.')
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def _decode_normal(x):
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y = x if x <= 127 else x - 255
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return y / 127
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if __name__ == "__main__":
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import argparse
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parser = argparse.ArgumentParser()
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parser.add_argument('filename', help = 'filename of the .inc.c source file')
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parser.add_argument('output_directory', help = 'directory where to put the extracted .obj files')
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args = parser.parse_args()
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parse(args.filename, args.output_directory) |