mightyscape-1.2/extensions/fablabchemnitz/papercraft_unfold/d3/model/tools.py

100 lines
2.8 KiB
Python

import os
from importlib import import_module
from . import formats
from .formats import *
from .basemodel import ModelParser, Exporter
from types import ModuleType
supported_formats = []
class ModelType:
"""Represents a type of coding of 3D object, and the module enabling
parsing and exporting
"""
def __init__(self, typename, inner_module):
"""Creates a ModelType
:param typename: the name of the 3D format
:param inner_module: the module that will parse and export the format
"""
self.typename = typename
self.inner_module = inner_module
def test_type(self, file):
"""Tests if a file has the correct type
:param file: path to the file to test
"""
return getattr(self.inner_module, 'is_' + self.typename)(file)
def create_parser(self, *args, **kwargs):
"""Creates a parser of the current type
"""
return getattr(self.inner_module, self.typename.upper() + 'Parser')(*args, **kwargs)
def create_exporter(self, *args, **kwargs):
"""Creates an exporter of the current type
"""
return getattr(self.inner_module, self.typename.upper() + 'Exporter')(*args, **kwargs)
def find_type(filename, supported_formats):
"""Find the correct type from a filename
:param filename: path to the file
:param supported_formats: list of formats that we have modules for
"""
for type in supported_formats:
if type.test_type(filename):
return type
for name in formats.__dict__:
if isinstance(formats.__dict__[name], ModuleType) and name != 'glob':
type = ModelType(name, formats.__dict__[name])
supported_formats.append(type)
def load_model(path, up_conversion = None):
"""Loads a model from a path
:param path: path to the file to load
:param up_conversion: conversion of up vectors
"""
parser = None
type = find_type(path, supported_formats)
if type is None:
raise Exception("File format not supported \"" + str(type) + "\"")
parser = type.create_parser(up_conversion)
parser.parse_file(path)
return parser
def export_model(model, path):
"""Exports a model to a path
:param model: model to export
:param path: path to save the model
"""
exporter = None
type = find_type(path, supported_formats)
if type is None:
raise Exception('File format is not supported')
exporter = type.create_exporter(model)
return exporter
def convert(input, output, up_conversion = None):
"""Converts a model
:param input: path of the input model
:param output: path to the output
:param up_conversion: convert the up vector
"""
model = load_model(input, up_conversion)
exporter = export_model(model, output)
return str(exporter)