framework/cg/pipeline/freecad_to_asset.py

# -*- coding: utf-8 -*-
'''
DESCRIPTION.
Convert and setup FreeCAD solid objects to 3d assets mesh files.
Support Blender compiled as a Python Module only!
'''
__version__ = '0.5'

import logging
import os
import sys
sys.path.append('../')
from freecad.utils.export_freecad_scene import freecad_to_json

from blender.import_cad.build_blender_scene import json_to_blend
from blender.import_cad.restruct_hierarchy_by_lcs import restruct_hierarchy
from blender.import_cad.import_coordinate_point import lcs_json_importer
from blender.utils.remove_collections import remove_collections
from blender.utils.cleanup_orphan_data import cleanup_orphan_data
from blender.utils.sdf_mesh_selector import sdf_mesh_selector
from blender.remesh.highpoly_setup import setup_meshes
from blender.remesh.lowpoly_setup import parts_to_shells

from export.dae import export_dae
from export.collision import export_col_stl
import bpy
import mathutils

logger = logging.getLogger(__name__)
logging.basicConfig(level=logging.INFO)

'''
IMPORT COLLECTIONS NAMIG CONVENTION:
Import Parts - collection for mesh objects
Import LCS - collection for location points
Import Hierarchy - collection for hierarchy locators

LCS POINT'S SUFFIXES CONVENTION:
'_in' - inlet suffix
'_out' - outlet suffix
'_root' - root suffix

CG ASSETS SUFFIXES CONVENTION:
'_hp' - hightpoly asset (reference baking source)
'_lp' - lowpoly asset   (prepared for game engines)
'_render' - root suffix (prepared for render engines)
'''


# COLLECTIONS NAMIG CONVENTION
parts_col_name = 'Import Parts'
lcs_col_name = 'Import LCS'
hierarchy_col_name = 'Import Hierarchy'
lowpoly_col_name = 'Lowpoly Parts'
# LCS POINT'S SUFFIXES CONVENTION
inlet = '_in'
outlet = '_out'
root = '_root'
# CG ASSETS SUFFIXES CONVENTION
hightpoly = '_hp'
lowpoly = '_lp'
render = '_render'


def freecad_asset_pipeline(fcstd_path,
                           tesselation_method,
                           linear_deflection,
                           angular_deflection,
                           fem_size,
                           mesh_export_path=None,
                           json_path=None,
                           blend_path=None,
                           sdf_path=None):
    ''' Setup FreeCAD scene to CG asset '''

    # prepare blend file
    remove_collections()
    cleanup_orphan_data()

    ## convert FreeCAD scene to Blender scene
    # TODO
    objs_for_render = json_to_blend(freecad_to_json(**kwargs))

    # restructuring hierarchy by lcs points
    lcs_objects = restruct_hierarchy()

    # import lcs
    if not bpy.data.collections.get(lcs_col_name):
        if not bpy.data.collections[lcs_col_name].objects:
            if json_path is None:
                json_path = os.path.dirname(fcstd_path)
            for f in os.listdir(os.path.dirname(fcstd_path)):
                if f.endswith('.json'):
                    json_file = os.path.join(json_path, f)
                    lcs_json_importer(json_file)

    # sdf setup WIP
    if sdf_path is not None:
        sdf_mesh_selector(sdf_path)

    # save blender scene
    if blend_path is not None:
        if not os.path.isdir(os.path.dirname(blend_path)):
            os.makedirs(os.path.dirname(blend_path))
        bpy.ops.wm.save_as_mainfile(filepath=blend_path)

    # retopo
    setup_meshes(objs_for_render, sharpness=True, shading=True)

    part_names = [p.name.split(inlet)[0] for p in lcs_objects if p.name.endswith(inlet)]
    parts_to_shells(part_names)

    # save blender scene
    if blend_path is not None:
        if not os.path.isdir(os.path.dirname(blend_path)):
            os.makedirs(os.path.dirname(blend_path))
        bpy.ops.wm.save_as_mainfile(filepath=blend_path)

    # export all objects
    if mesh_export_path is not None:
        obs = bpy.context.selected_objects
        for ob in obs:
            ob.matrix_world = mathutils.Matrix()
        for ob in obs:
            ob.select_set(state=True)
        export_dae(mesh_export_path)
        export_col_stl(mesh_export_path)


if __name__ == '__main__':
    import argparse

    parser = argparse.ArgumentParser(
        description='Convert and setup FreeCAD solid objects to 3d assets mesh files.')
    parser.add_argument(
        '--fcstd_path', type=str, help='Path to source FreeCAD scene', required=True)
    parser.add_argument(
        '--tesselation_method', type=str, help='Select tesselation method: Standard or FEM.', default='Standard', required=False)
    parser.add_argument(
        '--linear_deflection', type=float, help='Max linear distance error', default=0.1, required=False)
    parser.add_argument(
        '--angular_deflection', type=float, help='Max angular distance error', default=20.0, required=False)
    parser.add_argument(
        '--fem_size', type=float, help='For FEM method only! Finite element size in mm', default=1.0, required=False)
    parser.add_argument(
        '--mesh_export_path', type=str, help='Path for export meshes', required=False)
    parser.add_argument(
        '--json_path', type=str, help='Path to DIR with coordinate points jsons', required=False)
    parser.add_argument(
        '--blend_path', type=str, help='Path for export blend assembly file', required=False)
    parser.add_argument(
        '--sdf_path', type=str, help='Path to source SDF assembly file', required=False)
    args = parser.parse_args()

    freecad_asset_pipeline(args.fcstd_path,
                           args.tesselation_method,
                           args.linear_deflection,
                           args.angular_deflection,
                           args.fem_size,
                           args.mesh_export_path,
                           args.json_path,
                           args.blend_path,
                           args.sdf_path)

    logger.info('Assets setup completed!')