Changes to FreeWRL to get crowd_hanim_multi.x3d working:

HAnimPermuter : X3DChildNode {
  MFNode  [in,out] humanoids [] [HAnimHumanoid]
  MFNode  [in,out] motions   [] [HAnimMotion, HAnimMotionData*]
  SFBool  [in,out] compute   FALSE
  MFInt32 [out]    permutations
  SFInt32 [in,out] index     -1
  SFNode  [out]    humanoid     [HAnimHumanoid]
}

Optional refactoring of HAnimMotion:
HAnimMotion : HAnimMotionPlay, HAnimMotionData
HAnimMotionDataFile : HAnimMotionData

ParticleSystem {
  # added HANIM geometryType:
  SFString []       geometryType      "QUAD"    ["LINE"|"POINT"|"QUAD"|"SPRITE"|"TRIANGLE"|"GEOMETRY"|"HANIM"|...]


MapEmitter : X3DParticleEmitterNode {
  # standard X3DParticleEmitter emitter fields
  SFVec3f [in,out] position     0 0 0
  SFFloat [in,out] speed        0
  SFFloat [in,out] variation    0.25
  # MapEmitter specific fields
  SFNode  [in,out] functionMap  NULL [X3DSingleTextureNode]
  SFVec2f []       gridSize     1 1
  MFColor []       emitterColor []
  SFFloat []       colorMatchTolerance .01
  SFBool  [in,out] classified   FALSE
}


MapPhysicsModel : X3DParticlePhysicsModelNode {
  SFNode  [in,out] functionMap   NULL [X3DSingleTextureNode]
  SFColor []       obstacleColor 0 0 0
  MFColor []       sinkColor     []
  SFColor []       pauseColor    1 0 0
  SFBool  [in,out] pauseState    FALSE
  SFFloat []       colorMatchTolerance .01
  SFVec2f []       gridSize      1 1
  SFBool  [in,out] classified    FALSE
}

Internal particle struct changes:
typedef struct {
        //no-changes:
	// store at end of current iteration, for use on next iteration
	float age;
	float lifespan; //assigned at birth
	float size[2];  //assigned at birth
	float position[3];
	float velocity[3];
	float origin[3]; //zero normally. For boundedphysics, updated on each reflection to be last reflection point.
	float speed;
	float mass;
	float surfaceArea;

typedef struct {

	//added for HANIM particles, but could be used for other particles:
	float direction[3]; //normalized last non-zero velocity vector

	//added for mapemitter method
	int sink; //assigned after birth in MapPhysics, for MapPhysics, MapEmitter
	int maplocation[2]; //last popmap location in MapPhysics
	int paused; //HANIM 0= use first motion 1= use second motion
	double transitionStart[2];
	double transitionTime[2];
	double _startTime[2];
	int lastMotionsEnabled[2];

	//added for mapemitter + HAnimPermuter method (could be generalized to more emitters?)
	int permutationIndex;
} particle;

Refactoring of particle loop for regular geometry vs HANIM:
HANIM:
- doesn't behave like Shape node, ignores materials on ParticleSystem
- delegates appearance, shader setup, to humanoid rendering