108 lines
3.2 KiB
Python
108 lines
3.2 KiB
Python
#!/usr/bin/env python3
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from .model import ModelParser, Exporter, Vertex, Face, FaceVertex
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def is_ply(filename):
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return filename[-4:] == '.ply'
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class PLYParser(ModelParser):
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def __init__(self):
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super().__init__()
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self.counter = 0
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self.elements = []
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self.inner_parser = PLYHeaderParser(self)
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def parse_line(self, string):
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self.inner_parser.parse_line(string)
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class PLYHeaderParser:
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def __init__(self, parent):
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self.current_element = None
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self.parent = parent
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def parse_line(self, string):
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split = string.split()
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if string == 'ply':
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return
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elif split[0] == 'format':
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if split[1] != 'ascii' or split[2] != '1.0':
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print('Only ascii 1.0 format is supported', file=sys.stderr)
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sys.exit(-1)
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elif split[0] == 'element':
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self.current_element = PLYElement(split[1], int(split[2]))
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self.parent.elements.append(self.current_element)
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elif split[0] == 'property':
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self.current_element.add_property(split[2], split[1])
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elif split[0] == 'end_header':
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self.parent.inner_parser = PLYContentParser(self.parent)
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class PLYElement:
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def __init__(self, name, number):
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self.name = name
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self.number = number
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self.properties = []
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def add_property(self, name, type):
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self.properties.append((name, type))
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class PLYContentParser:
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def __init__(self, parent):
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self.parent = parent
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self.element_index = 0
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self.counter = 0
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self.current_element = self.parent.elements[0]
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def parse_line(self, string):
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split = string.split()
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if self.current_element.name == 'vertex':
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self.parent.add_vertex(Vertex().from_array(split))
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elif self.current_element.name == 'face':
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self.parent.add_face(Face(FaceVertex(int(split[1])), FaceVertex(int(split[2])), FaceVertex(int(split[3]))))
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self.counter += 1
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if self.counter == self.current_element.number:
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self.next_element()
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def next_element(self):
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self.element_index += 1
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if self.element_index < len(self.parent.elements):
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self.current_element = self.parent.elements[self.element_index]
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class PLYExporter(Exporter):
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def __init__(self, model):
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super().__init__(model)
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def __str__(self):
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# Header
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string = "ply\nformat ascii 1.0\ncomment Automatically gnerated by model-converter\n"
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# Types : vertices
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string += "element vertex " + str(len(self.model.vertices)) +"\n"
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string += "property float32 x\nproperty float32 y\nproperty float32 z\n"
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# Types : faces
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string += "element face " + str(len(self.model.faces)) + "\n"
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string += "property list uint8 int32 vertex_indices\n"
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# End header
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string += "end_header\n"
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# Content of the model
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for vertex in self.model.vertices:
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string += str(vertex.x) + " " + str(vertex.y) + " " + str(vertex.z) + "\n"
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for face in self.model.faces:
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string += "3 " + str(face.a.vertex) + " " + str(face.b.vertex) + " " + str(face.c.vertex) + "\n"
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return string
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