DMX model

This article contains speculation that needs to be confirmed.

For sanity's sake, the data structure is expressed in pseudo-C++.

• Todo: Are names case sensitive?

class DmeModelRoot
{
	// model and skeleton should point to the same object
	DmeModel*	model;
	DmeModel*	skeleton;
	
	DmeCombinationOperator*	combinationOperator; // flex animations only
};

class DmeCombinationOperator // flex controller global settings
{
	DmeCombinationInputControl	controls[];
	Vector		controlValues[];		// rest position...but why a 3D vector?
	Vector		controlValuesLagged[];	// unknown
	bool		usesLaggedValues;
	DmeMesh*	dominators[];			// unknown
	DmeMesh*	targets[];				// mesh with the shapes on
};

class DmeCombinationInputControl // a flex controller
{
	CUtlString	rawControlNames[];	// which controls are being wrapped
	bool		stereo;				// equivalent to QC 'split'?
	bool		eyelid;				// flags as an eyelid used by AI for blinking
	float		wrinkleScales[];	// wrinklemap stuff; one value for each named control.
};

class DmeModel
{
	DmeTransform*		transform;		// global model transform? DAG not supported here?
	DmeAttachment*		shape;
	bool				visible;
	DmeModel			children[];
	DmeJoint			jointList[];
	DmeTransformList	baseStates[];	// bone positions; only ever seen with one value	
	CUtlString			upAxis;			// uppercase character
};

// A "DAG" is a generic Maya container, appearing here in order to transform objects.
// It can take the place of a DmeMesh, DmeJoint or DmeAttachment at any time.
class DmeDag
{
	DmeTransform*	transform;
	bool			visible;
	void			children[]; // never seen used
	
	// One of the following:
	CUtlString		name // of a DmeJoint
	DmeMesh*		shape;
	DmeAttachment*	shape;
};

class DmeJoint // a bone
{
	DmeTransform*	transform;
	void*			shape; // only seen empty
	bool			visible;
	DmeJoint		children[];
	bool			lockInfluenceWeights;
};

class DmeTransformList
{
	DmeTransform	transforms[];
};
	
class DmeTransform // name is of a defined model if there are children, otherwise blank
{
	Vector		position;
	Quaternion	orientation;
};

class DmeAttachment // an attachment
{
	bool		visible;
	bool		IsRigid; // does not animate with associated bone
	bool		isWorldAligned; // transform in world co-ords
};

class DmeMesh
{
	bool				visible;

	void*				bindState;		// only seen empty
	DmeVertexData*		currentState;	// pointer to default baseState		
	DmeVertexData		baseStates[];	// only ever seen with one value	
	DmeVertexData		deltaStates[];	// unknown
	
	DmeFaceSet			faceSets[];

	Vector2D			deltaStateWeights[];		// unknown
	Vector2D			deltaStateWeightsLagged[];	// unknown
};

class DmeVertexData // mesh data
{
	CUtlString	vertexFormat[];		// positions, normals, textureCoordinates, [jointWeights, jointIndices]
	int			jointCount;			// total number of bones this mesh is weighted to
	bool		flipVCoordinates;	// left-handed to right-handed?

	// In the next three cases, the "Indicies" array contains one entry for each vertex.
	// the indice value defines which value from the 'real' array the vertex takes. In this
	// way, vertices can share data. This is a useful optimisation since each poly has its
	// own three verts, even if they overlap other verts.
	
	Vector		positions[];
	int			positionsIndicies[];

	Vector		normals[];
	int			normalsIndicies[];

	Vector2D	textureCoordinates[];
	int			textureCoordinatesIndicies[];
	
	// Weightmapping; optional. The size of both arrays is equal to ( sizeof(positions) * jointCount );
	// it is not possible for two verts in the same place to be weighted differently.
	float		jointWeights[];		// weight
	int			jointIndicies[];	// index in DmeModel::jointList
};

class DmeFaceSet // defines faces, including their material
{
	DmeMaterial*	material; // the material these faces are drawn with
	int				faces[]; // the vertices that make up each face, delimited by -1. Supports quads.
};

class DmeMaterial // a material
{
	CUtlString	mtlName; // relative to \game\materials\, no extension
};