autothumb_material_bg.py

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#
#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License
#  as published by the Free Software Foundation; either version 2
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#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#  GNU General Public License for more details.
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#  along with this program; if not, write to the Free Software Foundation,
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from blenderkit import utils, append_link, bg_blender, upload_bg, download

import sys, json, math, os
import bpy
from pathlib import Path


BLENDERKIT_EXPORT_DATA = sys.argv[-1]


def render_thumbnails():
    bpy.ops.render.render(write_still=True, animation=False)


def unhide_collection(cname):
    collection = bpy.context.scene.collection.children[cname]
    collection.hide_viewport = False
    collection.hide_render = False
    collection.hide_select = False


if __name__ == "__main__":
    try:
        bg_blender.progress('preparing thumbnail scene')
        user_preferences = bpy.context.preferences.addons['blenderkit'].preferences

        with open(BLENDERKIT_EXPORT_DATA, 'r',encoding='utf-8') as s:
            data = json.load(s)
            # append_material(file_name, matname = None, link = False, fake_user = True)
        if data.get('do_download'):
            #need to save the file, so that asset doesn't get downloaded into addon directory
            temp_blend_path = os.path.join(data['tempdir'], 'temp.blend')
            bpy.ops.wm.save_as_mainfile(filepath=temp_blend_path)

            asset_data = data['asset_data']
            has_url = download.get_download_url(asset_data, download.get_scene_id(), user_preferences.api_key, tcom=None,
                                                resolution='blend')
            if not has_url:
                bg_blender.progress("couldn't download asset for thumnbail re-rendering")
                exit()
            # download first, or rather make sure if it's already downloaded
            bg_blender.progress('downloading asset')
            fpath = download.download_asset_file(asset_data)
            data['filepath'] = fpath

        mat = append_link.append_material(file_name=data['filepath'], matname=data["asset_name"], link=True,
                                          fake_user=False)


        s = bpy.context.scene

        colmapdict = {
            'BALL': 'Ball',
            'BALL_COMPLEX': 'Ball complex',
            'FLUID': 'Fluid',
            'CLOTH': 'Cloth',
            'HAIR': 'Hair'
        }
        unhide_collection(colmapdict[data["thumbnail_type"]])
        if data['thumbnail_background']:
            unhide_collection('Background')
            bpy.data.materials["bg checker colorable"].node_tree.nodes['input_level'].outputs['Value'].default_value \
                = data['thumbnail_background_lightness']
        tscale = data["thumbnail_scale"]
        scaler = bpy.context.view_layer.objects['scaler']
        scaler.scale = (tscale, tscale, tscale)
        utils.activate(scaler)
        bpy.ops.object.transform_apply(location=False, rotation=False, scale=True)

        bpy.context.view_layer.update()

        for ob in bpy.context.visible_objects:
            if ob.name[:15] == 'MaterialPreview':
                utils.activate(ob)
                bpy.ops.object.transform_apply(location=False, rotation=False, scale=True)

                ob.material_slots[0].material = mat
                ob.data.use_auto_texspace = False
                ob.data.texspace_size.x = 1 #/ tscale
                ob.data.texspace_size.y = 1 #/ tscale
                ob.data.texspace_size.z = 1 #/ tscale
                if data["adaptive_subdivision"] == True:
                    ob.cycles.use_adaptive_subdivision = True

                else:
                    ob.cycles.use_adaptive_subdivision = False
                ts = data['texture_size_meters']
                if data["thumbnail_type"] in ['BALL', 'BALL_COMPLEX', 'CLOTH']:
                   utils.automap(ob.name, tex_size = ts / tscale, just_scale = True, bg_exception=True)
        bpy.context.view_layer.update()

        s.cycles.volume_step_size = tscale * .1

        if user_preferences.thumbnail_use_gpu:
            bpy.context.scene.cycles.device = 'GPU'

        s.cycles.samples = data['thumbnail_samples']
        bpy.context.view_layer.cycles.use_denoising = data['thumbnail_denoising']

        # import blender's HDR here
        hdr_path = Path('datafiles/studiolights/world/interior.exr')
        bpath = Path(bpy.utils.resource_path('LOCAL'))
        ipath = bpath / hdr_path
        ipath = str(ipath)

        # this  stuff is for mac and possibly linux. For blender // means relative path.
        # for Mac, // means start of absolute path
        if ipath.startswith('//'):
            ipath = ipath[1:]

        img = bpy.data.images['interior.exr']
        img.filepath = ipath
        img.reload()

        bpy.context.scene.render.resolution_x = int(data['thumbnail_resolution'])
        bpy.context.scene.render.resolution_y = int(data['thumbnail_resolution'])

        bpy.context.scene.render.filepath = data['thumbnail_path']
        bg_blender.progress('rendering thumbnail')
        # bpy.ops.wm.save_as_mainfile(filepath='C:/tmp/test.blend')
        # fal
        render_thumbnails()
        if data.get('upload_after_render') and data.get('asset_data'):
            bg_blender.progress('uploading thumbnail')
            preferences = bpy.context.preferences.addons['blenderkit'].preferences

            file = {
                "type": "thumbnail",
                "index": 0,
                "file_path": data['thumbnail_path'] + '.png'
            }
            upload_data = {
                "name": data['asset_data']['name'],
                "token": preferences.api_key,
                "id": data['asset_data']['id']
            }
            upload_bg.upload_file(upload_data, file)
        bg_blender.progress('background autothumbnailer finished successfully')


    except Exception as e:
        print(e)
        import traceback

        traceback.print_exc()

        sys.exit(1)