我从 RealFlow 4 导出了一个 .bin 文件，现在需要能够在 Python 中读取它，以创建一个导入器。这些文件如何工作？
请您参考如下方法:
给你:
import struct
class Particle:
"""A single particle. Attributes added in BinFile."""
pass
class BinFile:
"""Parse and store the contents of a RealFlow .bin file."""
def __init__(self, fname):
self.bindata = open(fname, "rb").read()
self.off = 0
self.verify = self.peel("=i")[0]
assert self.verify == 0xfabada
self.name = self.string(250)
(self.version, self.scale, self.fluid_type, self.simtime, self.frame_number,
self.fps, self.num_particles, self.radius) = self.peel("=hfifiiif")
self.pressure = self.peel("=fff")
self.speed = self.peel("=fff")
self.temperature = self.peel("=fff")
if self.version >= 7:
self.emitter_position = self.peel("=fff")
self.emitter_rotation = self.peel("=fff")
self.emitter_scale = self.peel("=fff")
self.particles = [self.peel_particle() for i in range(self.num_particles)]
def peel_particle(self):
"""Read one particle from the file."""
p = Particle()
p.position = self.peel("=fff")
p.velocity = self.peel("=fff")
p.force = self.peel("=fff")
if self.version >= 9:
p.vorticity = self.peel("=fff")
if self.version >= 3:
p.normal = self.peel("=fff")
if self.version >= 4:
p.neighbors = self.peel("=i")[0]
if self.version >= 5:
p.texture = self.peel("=fff")
p.infobits = self.peel("=h")[0]
(p.age, p.isolation_time, p.viscosity, p.density, p.pressure, p.mass,
p.temperature, p.id) = self.peel("=fffffffi")
print p.id, p.neighbors, p.position
return p
def peel(self, fmt):
"""Read some struct data from `self.bindata`."""
data = struct.unpack_from(fmt, self.bindata, self.off)
self.off += struct.calcsize(fmt)
return data
def string(self, length):
s = self.bindata[self.off:self.off+length].split("\0")[0]
self.off += length
return s
b = BinFile("Circle0100001.bin")
print "Name:", b.name
print "Particles:", b.num_particles
print "Position of first particle", b.particles[0].position
在您的示例数据上运行时，它会打印:
Name: Circle01
Particles: 1066
Position of first particle (-1.7062506675720215, 4.9283280372619629, -6.4365010261535645)
