export particles using the realflow format

[coclea]

I want to export particles or points using the realflow format.

My code is almost working, I am probably just missing a character that makes the file readable, as the realflow plug in reads the file but just display the last particle.

I am using version 9 of the realflow bin format.

Does anyone have an idea what could be missing?

 

Please find the code below:

 

    version = 9

    node = hou.pwd()

    geo = node.geometry()

    fileIn = open( fileName, 'wb')

    fileIn.write( struct.pack('H', 0xBADA))

    fileIn.write( struct.pack('H', 0xFA))

    name = "exportParticles"

    name = name.replace( "\n", "")

    print( len(name))

    fileIn.write( struct.pack( '250s', name.ljust( 250 , '\0')))

    fileIn.write( struct.pack('h', version))

    fileIn.write( struct.pack('f', 1.0))        #scale scene

    fileIn.write( struct.pack('l', 5))          #fluid type

    fileIn.write( struct.pack('f', (frame*getFramesPerSecond())))        #ellapsed time

    fileIn.write( struct.pack('l', frame))          #frameNumber

    fileIn.write( struct.pack('l', getFramesPerSecond()))          #frames per second)

 

    points = geo.points()

    fileIn.write( struct.pack( 'l', len(points)))

    fileIn.write( struct.pack( 'f', 1.0))        #radius

    fileIn.write( struct.pack( '3f', 1., 1., 1.)) #pressure    

    fileIn.write( struct.pack( '3f', 1., 1., 1.)) #speed

    fileIn.write( struct.pack( '3f', 1., 1., 1.))         #temperature

    fileIn.write( struct.pack( '3f', 1., 1., 1.))         #emitter position

    fileIn.write( struct.pack( '3f', 1., 1., 1.))         #emitter rotation

    fileIn.write( struct.pack( '3f', 1., 1., 1.))         #emitter scale    

    for p in points:

        fileIn.write( struct.pack('f', p.position()[2]))

        fileIn.write( struct.pack('f', p.position()[1]))

        fileIn.write( struct.pack('f', p.position()[0]))       

        

        #velocity

        fileIn.write( struct.pack('3f', 0., 0., 0.))  

        #force

        fileIn.write( struct.pack('3f', 0., 0., 0.)) 

        #vorticity

        fileIn.write( struct.pack('3f', 0., 0., 0.)) 

        #normal

        fileIn.write( struct.pack('3f', 0., 0., 0.)) 

        #neighbours

        fileIn.write( struct.pack('l', 0)) 

        #uvs

        fileIn.write( struct.pack('3f', 0., 0., 0.)) 

        #info

        fileIn.write( struct.pack('h', 0))

        #age

        fileIn.write( struct.pack('f', 10.)) 

        #isolated

        fileIn.write( struct.pack('f', 0.)) 

        #viscosity

        fileIn.write( struct.pack('f', 0.)) 

        #density

        fileIn.write( struct.pack('f', 0.)) 

        #pres

        fileIn.write( struct.pack('f', 0.)) 

        #mass

        fileIn.write( struct.pack('f', 1.)) 

        #temperature

        fileIn.write( struct.pack('f', 1.)) 

        #id

        fileIn.write( struct.pack('l', 0)) 

 

#additionnal datas

    fileIn.write( struct.pack('l', 0)) 

# additionnal datas RF4

    fileIn.write( struct.pack('?', False)) 

    fileIn.close()

[coclea]

I just found my bug: I put a zero for the particleId that's why it was not working