Add frankenscript
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bphys/baked_physics_to_pc2.py
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422
bphys/baked_physics_to_pc2.py
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#!/usr/bin/env python
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"""
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A frankenscript that converts baked softbody physics data to a pc2 file
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"""
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# ##### BEGIN GPL LICENSE BLOCK #####
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# ##### END GPL LICENSE BLOCK #####
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# SOURCE: https://blenderartists.org/t/point-cache-doctor-script/593708
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import os, struct, sys, argparse
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from sys import argv, flags
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from os import path
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_byteorder = 'little'
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_byteorder_fmt = '<'
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def dict_merge(d, other):
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"""Utility function for creating a modified dict"""
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c = d.copy()
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c.update(other)
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return c
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def print_progress_bar(msg, percent, size):
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sys.stdout.write('{0}\r[{1}] {2}%'.format(msg, ('#'*int(percent/100.0*size)).ljust(size), percent))
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sys.stdout.flush()
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def cache_files(directory, index=0):
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"""Cache frame files in a directory"""
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for filename in os.listdir(directory):
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try:
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base, ext = path.splitext(filename)
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parts = base.split('_')
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if len(parts) in (2, 3):
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cframe = int(parts[1])
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cindex = int(parts[2]) if len(parts) >= 3 else 0
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if cindex == index:
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yield cframe, filename
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except:
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pass
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def cache_file_list(directory, index=0):
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"""Cache frame files in a directory, sorted by frame"""
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return sorted(cache_files(directory, index), key=lambda item: item[0])
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def pack_string(v, size):
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return struct.pack('%ds' % size, v.encode(encoding='UTF-8'))
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def unpack_string(b, size):
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return struct.unpack('%ds' % size, b)[0].decode(encoding='UTF-8')
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def pack_uint(v):
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return struct.pack('I', v)
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def unpack_uint(b):
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return struct.unpack('I', b)[0]
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def pack_float(v):
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return struct.pack('f', v)
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def unpack_float(b):
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return struct.unpack('f', b)[0]
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def pack_vector(v):
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return struct.pack('fff', v[0], v[1], v[2])
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def unpack_vector(b):
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return struct.unpack('fff', b)
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def pack_quaternion(v):
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return struct.pack('ffff', v[0], v[1], v[2], v[3])
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def unpack_quaternion(b):
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return struct.unpack('ffff', b)
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def pack_color(v):
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return struct.pack('ffff', v[0], v[1], v[2], v[3])
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def unpack_color(b):
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return struct.unpack('ffff', b)
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class ParticleTimes():
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__slots__ = ('birthtime', 'lifetime', 'dietime')
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def __init__(self, birthtime, lifetime, dietime):
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self.birthtime = birthtime
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self.lifetime = lifetime
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self.dietime = dietime
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def pack_particle_times(v):
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return struct.pack('fff', v.birthtime, v.lifetime, v.dietime)
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def unpack_particle_times(b):
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birthtime, lifetime, dietime = struct.unpack('fff')
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return ParticleTimes(birthtime, lifetime, dietime)
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class BoidData():
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__slots__ = ('health', 'acceleration', 'state_id', 'mode')
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def __init__(self, health, acceleration, state_id, mode):
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self.health = health
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self.acceleration = acceleration
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self.state_id = state_id
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self.mode = mode
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def pack_boid(v):
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return struct.pack('ffffhh', v.health, v.acceleration[0], v.acceleration[1], v.acceleration[2], v.state_id, v.mode)
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def unpack_boid(b):
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health, acc0, acc1, acc2, state_id, mode = struct.unpack('ffffhh')
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return BoidData(health, (acc0, acc1, acc2), state_id, mode)
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class TypeDesc():
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"""Data type descriptor"""
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def __init__(self, index, name, size, pack, unpack):
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self.index = index
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self.name = name
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self.size = size
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self.pack = pack
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self.unpack = unpack
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def __str__(self):
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return self.name
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def __repr__(self):
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return "TypeDesc(name=%r, size=%d)" % (self.name, self.size)
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_data_types_softbody = (
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TypeDesc(1, 'LOCATION', 12, pack_vector, unpack_vector),
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TypeDesc(2, 'VELOCITY', 12, pack_vector, unpack_vector),
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)
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_data_types_particles = (
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TypeDesc(0, 'INDEX', 4, pack_uint, unpack_uint),
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TypeDesc(1, 'LOCATION', 12, pack_vector, unpack_vector),
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TypeDesc(2, 'VELOCITY', 12, pack_vector, unpack_vector),
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TypeDesc(3, 'ROTATION', 16, pack_quaternion, unpack_quaternion),
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TypeDesc(4, 'AVELOCITY', 12, pack_vector, unpack_vector),
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TypeDesc(5, 'SIZE', 4, pack_float, unpack_float),
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TypeDesc(6, 'TIMES', 12, pack_particle_times, unpack_particle_times),
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TypeDesc(7, 'BOIDS', 20, pack_boid, unpack_boid),
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)
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_data_types_cloth = (
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TypeDesc(1, 'LOCATION', 12, pack_vector, unpack_vector),
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TypeDesc(2, 'VELOCITY', 12, pack_vector, unpack_vector),
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TypeDesc(4, 'XCONST', 12, pack_vector, unpack_vector),
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)
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_data_types_smoke = (
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TypeDesc(1, 'SMOKE_LOW', 12, pack_vector, unpack_vector),
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TypeDesc(2, 'SMOKE_HIGH', 12, pack_vector, unpack_vector),
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)
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_data_types_dynamicpaint = (
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TypeDesc(3, 'DYNAMICPAINT', 16, pack_color, unpack_color),
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)
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_data_types_rigidbody = (
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TypeDesc(1, 'LOCATION', 12, pack_vector, unpack_vector),
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TypeDesc(3, 'ROTATION', 16, pack_quaternion, unpack_quaternion),
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)
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_type_map = {
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0 : ('SOFTBODY', _data_types_softbody),
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1 : ('PARTICLES', _data_types_particles),
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2 : ('CLOTH', _data_types_cloth),
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3 : ('SMOKE_DOMAIN', _data_types_smoke),
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4 : ('SMOKE_HIGHRES', _data_types_smoke),
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5 : ('DYNAMICPAINT', _data_types_dynamicpaint),
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6 : ('RIGIDBODY', _data_types_rigidbody),
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}
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_flag_map = {
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0x00010000 : 'compress',
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0x00020000 : 'extra_data',
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}
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class CacheFrame():
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def __init__(self, filename):
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self.filename = filename
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self.totpoint = 0
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self.data_types = tuple()
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self.data = tuple()
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def get_data_type(self, name):
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for dt in self.data_types:
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if dt.name == name:
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return dt
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return None
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def get_data(self, name):
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for dt, data in zip(self.data_types, self.data):
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if dt.name == name:
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return data
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return None
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def set_data(self, name, values):
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self.data = tuple(data if dt.name != name else values for dt, data in zip(self.data_types, self.data))
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def read(self, directory, read_data):
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cachetype = ""
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data_types = {}
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f = open(path.join(directory, self.filename), "rb")
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try:
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cachetype, data_types = self.read_header(f)
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if read_data:
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self.read_points(f)
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else:
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self.data = None
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finally:
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f.close()
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return cachetype, data_types
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def read_header(self, f):
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bphysics = unpack_string(f.read(8), 8)
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if bphysics != 'BPHYSICS':
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raise Exception("Not a valid BPHYSICS cache file")
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typeflag = unpack_uint(f.read(4))
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cachetype, data_types = _type_map[typeflag & 0x0000FFFF]
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self.cachetype = cachetype
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for bits, flag in _flag_map.items():
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setattr(self, flag, bool(typeflag & bits))
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self.totpoint = unpack_uint(f.read(4))
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data_types_flag = unpack_uint(f.read(4))
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# frame has filtered data types list in case not all data types are stored
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self.data_types = tuple(filter(lambda dt: ((1<<dt.index) & data_types_flag) != 0, data_types))
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return cachetype, data_types
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def read_points(self, f):
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data = tuple([None] * self.totpoint for dt in self.data_types)
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if self.compress:
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raise Exception("Compressed caches are not supported yet, sorry ...")
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return data
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def interleaved():
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for k in range(self.totpoint):
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yield k, tuple(dt.unpack(f.read(dt.size)) if dt else None for dt in self.data_types)
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for k, data_point in interleaved():
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for data_list, value in zip(data, data_point):
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data_list[k] = value
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self.data = data
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def write(self, directory):
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f = open(path.join(directory, self.filename), "wb")
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try:
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self.write_header(f)
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self.write_points(f)
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finally:
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f.close()
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def write_header(self, f):
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f.write(pack_string('BPHYSICS', 8))
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typeflag = 0
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for index, (name, _) in _type_map.items():
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if name == self.cachetype:
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typeflag = typeflag | index
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break
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for bits, flag in _flag_map.items():
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if getattr(self, flag):
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typeflag = typeflag | bits
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f.write(pack_uint(typeflag))
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f.write(pack_uint(self.totpoint))
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data_types_flag = 0
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for dt in self.data_types:
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data_types_flag = data_types_flag | (1<<dt.index)
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f.write(pack_uint(data_types_flag))
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def write_points(self, f):
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if self.compress:
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raise Exception("Compressed caches are not supported yet, sorry ...")
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return data
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for k in range(self.totpoint):
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for data, dt in zip(self.data, self.data_types):
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f.write(dt.pack(data[k]))
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class PointCache():
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def __init__(self, directory, index=0):
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self.files = cache_file_list(directory, index)
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if not self.files:
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raise Exception("No point cache files for index %d in directory %s" % (index, directory))
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self.start_frame, info_filename = self.files[0]
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self.end_frame, _ = self.files[-1]
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info_frame = CacheFrame(info_filename)
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cachetype, data_types = info_frame.read(directory, read_data=False)
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self.cachetype = cachetype
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self.data_types = data_types
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for flag in _flag_map.values():
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setattr(self, flag, getattr(info_frame, flag))
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self.totpoint = info_frame.totpoint
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def get_data_type(self, name):
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for dt in self.data_types:
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if dt.name == name:
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return dt
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return None
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def cache_copy(idir, odir, index):
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cache = PointCache(idir, index)
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for cfra, filename in cache.files:
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frame = CacheFrame(filename)
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frame.read(idir, read_data=True)
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frame.write(odir)
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#SOURCE: https://github.com/joshhale/blender-addons/blob/master/io_export_pc2.py
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# ##### BEGIN GPL LICENSE BLOCK #####
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# ##### END GPL LICENSE BLOCK #####
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from os import remove
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import time
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import math
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import struct
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def get_sampled_frames(start, end, sampling):
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return [math.modf(start + x * sampling) for x in range(int((end - start) / sampling) + 1)]
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def export_pc2(point_cache: PointCache, cache_frames: list[CacheFrame], filepath, scale):
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start = point_cache.start_frame
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vertCount = len(cache_frames[0].data[0])
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headerFormat='<12siiffi'
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headerStr = struct.pack(headerFormat, b'POINTCACHE2\0', 1, vertCount, start, 1, vertCount)
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with open(filepath, "wb") as fo:
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fo.write(headerStr)
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for frame in cache_frames:
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locations = frame.data[0]
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for vert in locations:
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vert = tuple(c * (1/s) for c, s in zip(vert, scale))
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fo.write(struct.pack("<fff", *vert))
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def main(folder="blendcache_library", out_file="baked.pc2", scale=None):
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if scale is None:
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scale = (float(input("enter scale_x ")), float(input("enter scale_y ")), float(input("enter scale_z ")))
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pc = PointCache(folder)
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cache_frames = []
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for frame_num, file in pc.files:
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frame = CacheFrame(file)
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descriptor = frame.read(folder, True)
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assert descriptor[0] == "SOFTBODY" and descriptor[1][0].name == "LOCATION", "Unexpected format!"
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locations = frame.data[0]
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# print(f"Got {len(locations)} locations! at frame {frame_num}")
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cache_frames.append(frame)
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export_pc2(pc, cache_frames, out_file, scale)
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if __name__ == "__main__" and not flags.interactive:
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main()
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Add table
Reference in a new issue