[x3d-public] X3dToPython.xslt This appears to be a common problem: handling MFNode fields

[Brutzman, Donald (Don) (CIV)]

John: inspecting your helpful fragments, it looks like



*	Error is thrown on second WindPhysicsModel in array
*	The parent node ParticleSystem contains it in a field called physics
*	The physics field does not have enclosing square brackets and so is not 
treated as an MFNode array



Looking at specification (and checking tooltips) confirms that the physics 
field is an MFNode array:



*	X3D4 Architecture, Annex 40 Particle Systems, 40.4.5 ParticleSystem
* 
https://www.web3d.org/specifications/X3Dv4Draft/ISO-IEC19775-1v4-DIS/Part01/components/particleSystems.html#ParticleSystem



*	X3D Tooltips, ParticleSystem node, physics field
*	https://www.web3d.org/x3d/content/X3dTooltips.html#ParticleSystem.physics



I scanned through X3DUOM (which lists 175 MFNode fields) and found a number 
other missing MFNode fields as well:

*	attrib, pickTarget, shaders, parts, programs, outputs, rootNode, data, 
layers
*	ComposedTexture3D field texture (MultiTexture texture also MFNode, others 
SFNode)
*	ParticleSystem field color, colorRamp
*	RigidBody field geometry



Changes all applied in X3dToPython.xslt as part of variable isInMFNodeList, 
now checked in.



Hopefully that clears several of your tests.  Thanks for this report.



all the best, Don

-- 

Don Brutzman  Naval Postgraduate School, Code USW/Br        brutzman at nps.edu

Watkins 270,  MOVES Institute, Monterey CA 93943-5000 USA    +1.831.656.2149

X3D graphics, virtual worlds, Navy robotics https:// faculty.nps.edu/brutzman



From: John Carlson <yottzumm at gmail.com>
Sent: Friday, June 24, 2022 1:06 PM
To: Brutzman, Donald (Don) (CIV) <brutzman at nps.edu>; X3D Graphics public 
mailing list <x3d-public at web3d.org>; holger.seelig at gmail.com
Subject: X3dToPython.xslt This appears to be a common problem. Attaching 
source and generated python zip

Fire.py
  File 
"C:\Users\john\X3DJSONLD\src\main\python\net\x3djsonld\Library\Tests\Components\ParticleSystems\Fire.py", 
line 82
    WindPhysicsModel(direction=(1,-1,0),speed=0.15,gustiness=7)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
SyntaxError: invalid syntax. Perhaps you forgot a comma?



Here's a piece of the source code that appears in Fire.py:



    ParticleSystem(DEF='Fire2',geometryType='SPRITE',particleLifetime=2,lifetimeVariation=0.5,particleSize=(1,1),colorKey=[0],texCoordKey=[0,0.015625,0.03125,0.046875,0.0625,0.078125,0.09375,0.109375,0.125,0.140625,0.15625,0.171875,0.1875,0.203125,0.21875,0.234375,0.25,0.265625,0.28125,0.296875,0.3125,0.328125,0.34375,0.359375,0.375,0.390625,0.40625,0.421875,0.4375,0.453125,0.46875,0.484375,0.5,0.515625,0.53125,0.546875,0.5625,0.578125,0.59375,0.609375,0.625,0.640625,0.65625,0.671875,0.6875,0.703125,0.71875,0.734375,0.75,0.765625,0.78125,0.796875,0.8125,0.828125,0.84375,0.859375,0.875,0.890625,0.90625,0.921875,0.9375,0.953125,0.96875,0.984375,1],
      emitter=PointEmitter(direction=(0,0,0),speed=0.2,variation=0,mass=0.1,surfaceArea=0.1),
      physics=WindPhysicsModel(direction=(0,1,0),speed=0.5,gustiness=1.9),
      WindPhysicsModel(direction=(1,-1,0),speed=0.15,gustiness=7)
      color=ColorRGBA(color=[(1,1,1,0.1)]),



Here's the XML:



    <ParticleSystem DEF='Fire2'
        geometryType='SPRITE'
        particleLifetime='2'
        lifetimeVariation='0.5'
        particleSize='1 1'
        colorKey='0'
        texCoordKey='0, 0.015625, 0.03125, 0.046875, 0.0625, 0.078125, 
0.09375, 0.109375, 0.125, 0.140625, 0.15625, 0.171875, 0.1875, 0.203125, 
0.21875, 0.234375, 0.25, 0.265625, 0.28125, 0.296875, 0.3125, 0.328125, 
0.34375, 0.359375, 0.375, 0.390625, 0.40625, 0.421875, 0.4375, 0.453125, 
0.46875, 0.484375, 0.5, 0.515625, 0.53125, 0.546875, 0.5625, 0.578125, 
0.59375, 0.609375, 0.625, 0.640625, 0.65625, 0.671875, 0.6875, 0.703125, 
0.71875, 0.734375, 0.75, 0.765625, 0.78125, 0.796875, 0.8125, 0.828125, 
0.84375, 0.859375, 0.875, 0.890625, 0.90625, 0.921875, 0.9375, 0.953125, 
0.96875, 0.984375, 1'>
      <PointEmitter
          direction='0 0 0'
          speed='0.2'
          variation='0'
          mass='0.1'
          surfaceArea='0.1'/>
      <WindPhysicsModel
          direction='0 1 0'
          speed='0.5'
          gustiness='1.9'/>
      <WindPhysicsModel
          direction='1 -1 0'
          speed='0.15'
          gustiness='7'/>
      <ColorRGBA containerField='colorRamp'
          color='1 1 1 0.1'/>

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