FCDocument/FCDSkinController.h

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/*
    Copyright (C) 2005-2006 Feeling Software Inc.
    MIT License: http://www.opensource.org/licenses/mit-license.php
*/
/*
    Based on the FS Import classes:
    Copyright (C) 2005-2006 Feeling Software Inc
    Copyright (C) 2005-2006 Autodesk Media Entertainment
    MIT License: http://www.opensource.org/licenses/mit-license.php
*/

#ifndef _FCD_SKIN_CONTROLLER_H_
#define _FCD_SKIN_CONTROLLER_H_

#include "FCDocument/FCDObject.h"

class FCDocument;
class FCDController;
class FCDGeometry;
class FCDSceneNode;

struct FCDJointWeightPair
{
    FCDJointWeightPair() { jointIndex = 0; weight = 0.0f; }

    FCDJointWeightPair(uint32 _jointIndex, float _weight) { jointIndex = _jointIndex; weight = _weight; }

    uint32 jointIndex; 
    float weight; 
};

struct FCDJointMatrixPair
{
    FMMatrix44 invertedBindPose; 
    FCDSceneNode* joint; 
};

typedef vector<FCDJointMatrixPair> FCDJointList;

typedef vector<FCDJointWeightPair> FCDJointWeightPairList;

typedef vector<FCDJointWeightPairList> FCDWeightedMatches;

class FCOLLADA_EXPORT FCDSkinController : public FCDObject
{
private:
    DeclareObjectType;
    FCDController* parent;

    bool ownsTarget;
    FCDEntity* target;
    FMMatrix44 bindShapeTransform;

    StringList jointIds;
    FCDJointList joints;
    FCDWeightedMatches weightedMatches;

public:
    FCDSkinController(FCDocument* document, FCDController* parent);

    virtual ~FCDSkinController();
    
    FCDEntity* GetTarget() { return target; }
    const FCDEntity* GetTarget() const { return target; } 
    void SetTarget(FCDEntity* _target);

    const FMMatrix44& GetBindShapeTransform() const { return bindShapeTransform; }

    void SetBindShapeTransform(const FMMatrix44& bindPose) { bindShapeTransform = bindPose; }

    FCDJointList& GetJoints() { return joints; }
    const FCDJointList& GetJoints() const { return joints; } 
    size_t GetJointCount() const { return joints.size(); }

    FCDJointMatrixPair* GetJoint(size_t index) { FUAssert(index < GetJointCount(), return NULL); return &joints.at(index); }
    const FCDJointMatrixPair* GetJoint(size_t index) const { FUAssert(index < GetJointCount(), return NULL); return &joints.at(index); } 
    FCDJointMatrixPair* FindJoint(FCDSceneNode* joint);
    const FCDJointMatrixPair* FindJoint(const FCDSceneNode* joint) const; 
    void AddJoint(FCDSceneNode* joint, const FMMatrix44& bindPose);

    void RemoveJoint(FCDSceneNode* joint);

    FCDWeightedMatches& GetWeightedMatches() { return weightedMatches; }
    const FCDWeightedMatches& GetWeightedMatches() const { return weightedMatches; } 
    FCDWeightedMatches& GetVertexInfluences() { return weightedMatches; }
    const FCDWeightedMatches& GetVertexInfluences() const { return weightedMatches; } 
    size_t GetVertexInfluenceCount() const { return weightedMatches.size(); }

    FCDJointWeightPairList* GetInfluences(size_t index) { FUAssert(index < GetVertexInfluenceCount(), return NULL); return &weightedMatches.at(index); }
    const FCDJointWeightPairList* GetInfluences(size_t index) const { FUAssert(index < GetVertexInfluenceCount(), return NULL); return &weightedMatches.at(index); } 
    void ReduceInfluences(uint32 maxInfluenceCount, float minimumWeight=0.0f);

    FUStatus LoadFromXML(xmlNode* skinNode);

    xmlNode* WriteToXML(xmlNode* parentNode) const;

    FUStatus Link();
};

#endif // _FCD_SKIN_CONTROLLER_H_

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