mgcskincontroller.cpp

3D Game Engine Design Source Code非常棒

// Magic Software, Inc.
// http://www.magic-software.com
// Copyright (c) 2000, All Rights Reserved
//
// Source code from Magic Software is supplied under the terms of a license
// agreement and may not be copied or disclosed except in accordance with the
// terms of that agreement.  The various license agreements may be found at
// the Magic Software web site.  This file is subject to the license
//
// RESTRICTED USE SOURCE CODE
// http://www.magic-software.com/License/restricted.pdf

#include "MgcSkinController.h"
#include "MgcGeometry.h"
#include "MgcNode.h"

MgcImplementRTTI(MgcSkinController,MgcController);
MgcImplementStream(MgcSkinController);

//----------------------------------------------------------------------------
MgcSkinController::MgcSkinController (MgcGeometry* pkObject)
{
    MgcController::SetObject(pkObject);

    m_uiBoneQuantity = 0;
    m_apkBone = 0;
    m_auiSkinVertexQuantity = 0;
    m_aakSkinVertex = 0;
}
//----------------------------------------------------------------------------
MgcSkinController::~MgcSkinController ()
{
    delete[] m_apkBone;
    delete[] m_auiSkinVertexQuantity;

    for (unsigned int uiB = 0; uiB < m_uiBoneQuantity; uiB++)
        delete[] m_aakSkinVertex[uiB];

    delete[] m_aakSkinVertex;
}
//----------------------------------------------------------------------------
bool MgcSkinController::Update (MgcReal fAppTime)
{
    // The skin vertices are calculated in the bone world coordinate system.
    // The bone world coordinates already includes the world transform of the
    // common parent, so the world transforms for the skin mesh should be
    // the identity.
    MgcGeometry* pkGeom = (MgcGeometry*) m_pkObject;
    pkGeom->SetWorldTransformToIdentity();

    if ( !Active() )
        return true;

    // set all vertices to the zero vector
    MgcVector3* akVertex = pkGeom->Vertices();
    memset(akVertex,0,pkGeom->GetVertexQuantity()*sizeof(MgcVector3));


    // update dependent vertices for each bone
    for (unsigned int uiB = 0; uiB < m_uiBoneQuantity; uiB++)
    {
        MgcNode* pkBone = m_apkBone[uiB];
        MgcMatrix3 kSRot = pkBone->WorldScale()*pkBone->WorldRotate();
        unsigned int uiVMax = m_auiSkinVertexQuantity[uiB];
        SkinVertex* pkSV = m_aakSkinVertex[uiB];
        for (unsigned int uiV = 0; uiV < uiVMax; uiV++, pkSV++)
        {
            MgcVector3 kVTrn = kSRot*pkSV->m_kOffset +
                pkBone->WorldTranslate();
            akVertex[pkSV->m_uiIndex] += pkSV->m_fWeight*kVTrn;
        }
    }

    // update vertex normals if the skin has them
    if ( pkGeom->Normals() )
        pkGeom->UpdateModelNormals();

    pkGeom->UpdateModelBound();

    // controller computes world transform
    return true;
}
//----------------------------------------------------------------------------

//----------------------------------------------------------------------------
// streaming
//----------------------------------------------------------------------------
MgcObject* MgcSkinController::Factory (MgcStream& rkStream)
{
    MgcSkinController* pkObject = new MgcSkinController;
    MgcStream::Link* pkLink = new MgcStream::Link(pkObject);
    pkObject->Load(rkStream,pkLink);
    return pkObject;
}
//----------------------------------------------------------------------------
void MgcSkinController::Load (MgcStream& rkStream, MgcStream::Link* pkLink)
{
    MgcController::Load(rkStream,pkLink);

    MgcStreamRead(rkStream,m_uiBoneQuantity);

    m_apkBone = new MgcNode*[m_uiBoneQuantity];
    MgcStreamRead(rkStream,m_apkBone,m_uiBoneQuantity);
    unsigned int uiB;
    for (uiB = 0; uiB < m_uiBoneQuantity; uiB++)
        pkLink->Add(m_apkBone[uiB]);

    m_auiSkinVertexQuantity = new unsigned int[m_uiBoneQuantity];
    MgcStreamRead(rkStream,m_auiSkinVertexQuantity,m_uiBoneQuantity);

    m_aakSkinVertex = new SkinVertex*[m_uiBoneQuantity];
    for (uiB = 0; uiB < m_uiBoneQuantity; uiB++)
    {
        unsigned int uiVMax = m_auiSkinVertexQuantity[uiB];
        m_aakSkinVertex[uiB] = new SkinVertex[uiVMax];
        SkinVertex* pkSV = m_aakSkinVertex[uiB];
        for (unsigned int uiV = 0; uiV < uiVMax; uiV++, pkSV++)
            MgcStreamRead(rkStream,*pkSV);
    }
}
//----------------------------------------------------------------------------
void MgcSkinController::Link (MgcStream& rkStream, MgcStream::Link* pkLink)
{
    MgcController::Link(rkStream,pkLink);

    for (unsigned int uiB = 0; uiB < m_uiBoneQuantity; uiB++)
    {
        MgcObject* pkLinkID = pkLink->GetLinkID();
        m_apkBone[uiB] = (MgcNode*)rkStream.GetFromMap(pkLinkID);
    }
}
//----------------------------------------------------------------------------
bool MgcSkinController::Register (MgcStream& rkStream)
{
    if ( !MgcController::Register(rkStream) )
        return false;

    for (unsigned int uiB = 0; uiB < m_uiBoneQuantity; uiB++)
        m_apkBone[uiB]->Register(rkStream);

    return true;
}
//----------------------------------------------------------------------------
void MgcSkinController::Save (MgcStream& rkStream)
{
    MgcController::Save(rkStream);

    MgcStreamWrite(rkStream,m_uiBoneQuantity);
    MgcStreamWrite(rkStream,m_apkBone,m_uiBoneQuantity);
    MgcStreamWrite(rkStream,m_auiSkinVertexQuantity,m_uiBoneQuantity);

    for (unsigned int uiB = 0; uiB < m_uiBoneQuantity; uiB++)
    {
        unsigned int uiVMax = m_auiSkinVertexQuantity[uiB];
        SkinVertex* pkSV = m_aakSkinVertex[uiB];
        for (unsigned int uiV = 0; uiV < uiVMax; uiV++, pkSV++)
            MgcStreamWrite(rkStream,*pkSV);
    }
}
//----------------------------------------------------------------------------