jasonsperske · March 1, 2023 03:06 · adamsumm · Mar 18, 2016 · sleibrock · Feb 26, 2018
diff --git a/MIT-LICENSE b/MIT-LICENSE
 MIT License

 Copyright (c) 2018 Jason Sperske

 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
 in the Software without restriction, including without limitation the rights
 to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 copies of the Software, and to permit persons to whom the Software is
 furnished to do so, subject to the following conditions:

 The above copyright notice and this permission notice shall be included in all
 copies or substantial portions of the Software.

 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 SOFTWARE.
diff --git a/WADParser.py b/WADParser.py
 #!/usr/bin/env python3

 import struct
 import re

 class Wad(object):
    """Encapsulates the data found inside a WAD file"""

    def __init__(self, wadFile):
        """Each WAD files contains definitions for global attributes as well as map level attributes"""
        self.levels = []
        self.wad_format = 'DOOM' #Assume DOOM format unless 'BEHAVIOR' 
        with open(wadFile, "rb") as f:
            header_size = 12
            self.wad_type = f.read(4)[0]
            self.num_lumps = struct.unpack("<I", f.read(4))[0]
            data = f.read(struct.unpack("<I", f.read(4))[0] - header_size)

            current_level = Level(None) #The first few records of a WAD are not associated with a level

            lump = f.read(16) #Each offset is is part of a packet 16 bytes
            while len(lump) == 16:
                filepos = struct.unpack("<I", lump[0:4])[0] - header_size
                size = struct.unpack("<I", lump[4:8])[0]
                name = lump[8:16].decode('UTF-8').rstrip('\0')
                print(name)
                if(re.match('E\dM\d|MAP\d\d', name)):
                    #Level nodes are named things like E1M1 or MAP01
                    if(current_level.is_valid()):
                        self.levels.append(current_level)
                    
                    current_level = Level(name)
                elif name == 'BEHAVIOR':
                    #This node only appears in Hexen formated WADs
                    self.wad_format = 'HEXEN'
                else:
                    current_level.lumps[name] = data[filepos:filepos+size]

                lump = f.read(16)
            if(current_level.is_valid()):
                self.levels.append(current_level)

        for level in self.levels:
            level.load(self.wad_format)

 class Level(object):
    """Represents a level inside a WAD which is a collection of lumps"""
    def __init__(self, name):
        self.name = name
        self.lumps = dict()
        self.vertices = []
        self.lower_left = None
        self.upper_right = None
        self.shift = None
        self.lines = []

    def is_valid(self):
        return self.name is not None and 'VERTEXES' in self.lumps and 'LINEDEFS' in self.lumps

    def normalize(self, point, padding=5):
        return (self.shift[0]+point[0]+padding,self.shift[1]+point[1]+padding)

    def load(self, wad_format):
        for vertex in packets_of_size(4, self.lumps['VERTEXES']):
            x,y = struct.unpack('<hh', vertex[0:4])
            self.vertices.append((x,y))

        self.lower_left = (min((v[0] for v in self.vertices)), min((v[1] for v in self.vertices)))
        self.upper_right = (max((v[0] for v in self.vertices)), max((v[1] for v in self.vertices)))

        self.shift = (0-self.lower_left[0],0-self.lower_left[1])
        
        packet_size = 16 if wad_format is 'HEXEN' else 14
        for data in packets_of_size(packet_size, self.lumps['LINEDEFS']):
            self.lines.append(Line(data))

    def save_svg(self):
        """ Scale the drawing to fit inside a 1024x1024 canvas (iPhones don't like really large SVGs even if they have the same detail) """
        import svgwrite
        view_box_size = self.normalize(self.upper_right, 10)
        if view_box_size[0] > view_box_size[1]:
            canvas_size = (1024, int(1024*(float(view_box_size[1])/view_box_size[0])))
        else:
            canvas_size = (int(1024*(float(view_box_size[0])/view_box_size[1])), 1024)

        dwg = svgwrite.Drawing(self.name+'.svg', profile='tiny', size=canvas_size , viewBox=('0 0 %d %d' % view_box_size))
        for line in self.lines:
            a = self.normalize(self.vertices[line.a])
            b = self.normalize(self.vertices[line.b])
            if line.is_one_sided():
                dwg.add(dwg.line(a, b, stroke='#333', stroke_width=10))
            else:
                dwg.add(dwg.line(a, b, stroke='#999', stroke_width=3))

        dwg.save()

 class Line(object):
    """Represents a Linedef inside a WAD"""
    def __init__(self,data):
        self.a, self.b = struct.unpack('<hh', data[0:4])
        self.left_side, self.right_side = struct.unpack('<hh', data[-4:])

    def is_one_sided(self):
        return self.left_side == -1 or self.right_side == -1

 def packets_of_size(n, data):
    size = len(data)
    index = 0
    while index < size:
        yield data[index : index+n]
        index = index + n
    return

 if __name__ == "__main__":
    import sys

    if len(sys.argv) > 1:
        wad = Wad(sys.argv[1])
        for level in wad.levels:
            level.save_svg()
    else:
        print('You need to pass a WAD file as the only argument')
	MIT License

	Copyright (c) 2018 Jason Sperske

	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal
	in the Software without restriction, including without limitation the rights
	to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	copies of the Software, and to permit persons to whom the Software is
	furnished to do so, subject to the following conditions:

	The above copyright notice and this permission notice shall be included in all
	copies or substantial portions of the Software.

	THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	SOFTWARE.
	#!/usr/bin/env python3

	import struct
	import re

	class Wad(object):
	"""Encapsulates the data found inside a WAD file"""

	def __init__(self, wadFile):
	"""Each WAD files contains definitions for global attributes as well as map level attributes"""
	self.levels = []
	self.wad_format = 'DOOM' #Assume DOOM format unless 'BEHAVIOR'
	with open(wadFile, "rb") as f:
	header_size = 12
	self.wad_type = f.read(4)[0]
	self.num_lumps = struct.unpack("<I", f.read(4))[0]
	data = f.read(struct.unpack("<I", f.read(4))[0] - header_size)

	current_level = Level(None) #The first few records of a WAD are not associated with a level

	lump = f.read(16) #Each offset is is part of a packet 16 bytes
	while len(lump) == 16:
	filepos = struct.unpack("<I", lump[0:4])[0] - header_size
	size = struct.unpack("<I", lump[4:8])[0]
	name = lump[8:16].decode('UTF-8').rstrip('\0')
	print(name)
	if(re.match('E\dM\d\|MAP\d\d', name)):
	#Level nodes are named things like E1M1 or MAP01
	if(current_level.is_valid()):
	self.levels.append(current_level)

	current_level = Level(name)
	elif name == 'BEHAVIOR':
	#This node only appears in Hexen formated WADs
	self.wad_format = 'HEXEN'
	else:
	current_level.lumps[name] = data[filepos:filepos+size]

	lump = f.read(16)
	if(current_level.is_valid()):
	self.levels.append(current_level)

	for level in self.levels:
	level.load(self.wad_format)

	class Level(object):
	"""Represents a level inside a WAD which is a collection of lumps"""
	def __init__(self, name):
	self.name = name
	self.lumps = dict()
	self.vertices = []
	self.lower_left = None
	self.upper_right = None
	self.shift = None
	self.lines = []

	def is_valid(self):
	return self.name is not None and 'VERTEXES' in self.lumps and 'LINEDEFS' in self.lumps

	def normalize(self, point, padding=5):
	return (self.shift[0]+point[0]+padding,self.shift[1]+point[1]+padding)

	def load(self, wad_format):
	for vertex in packets_of_size(4, self.lumps['VERTEXES']):
	x,y = struct.unpack('<hh', vertex[0:4])
	self.vertices.append((x,y))

	self.lower_left = (min((v[0] for v in self.vertices)), min((v[1] for v in self.vertices)))
	self.upper_right = (max((v[0] for v in self.vertices)), max((v[1] for v in self.vertices)))

	self.shift = (0-self.lower_left[0],0-self.lower_left[1])

	packet_size = 16 if wad_format is 'HEXEN' else 14
	for data in packets_of_size(packet_size, self.lumps['LINEDEFS']):
	self.lines.append(Line(data))

	def save_svg(self):
	""" Scale the drawing to fit inside a 1024x1024 canvas (iPhones don't like really large SVGs even if they have the same detail) """
	import svgwrite
	view_box_size = self.normalize(self.upper_right, 10)
	if view_box_size[0] > view_box_size[1]:
	canvas_size = (1024, int(1024*(float(view_box_size[1])/view_box_size[0])))
	else:
	canvas_size = (int(1024*(float(view_box_size[0])/view_box_size[1])), 1024)

	dwg = svgwrite.Drawing(self.name+'.svg', profile='tiny', size=canvas_size , viewBox=('0 0 %d %d' % view_box_size))
	for line in self.lines:
	a = self.normalize(self.vertices[line.a])
	b = self.normalize(self.vertices[line.b])
	if line.is_one_sided():
	dwg.add(dwg.line(a, b, stroke='#333', stroke_width=10))
	else:
	dwg.add(dwg.line(a, b, stroke='#999', stroke_width=3))

	dwg.save()

	class Line(object):
	"""Represents a Linedef inside a WAD"""
	def __init__(self,data):
	self.a, self.b = struct.unpack('<hh', data[0:4])
	self.left_side, self.right_side = struct.unpack('<hh', data[-4:])

	def is_one_sided(self):
	return self.left_side == -1 or self.right_side == -1

	def packets_of_size(n, data):
	size = len(data)
	index = 0
	while index < size:
	yield data[index : index+n]
	index = index + n
	return

	if __name__ == "__main__":
	import sys

	if len(sys.argv) > 1:
	wad = Wad(sys.argv[1])
	for level in wad.levels:
	level.save_svg()
	else:
	print('You need to pass a WAD file as the only argument')