KeosAnimatedMeshKF.cpp

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/*
 * This source file is part of KEOS (Free 3D Engine)
 * For the latest info, see http://www.keosengine.org/
 * E-mails : thierry.vouriot@keosengine.org, yeri@keosengine.org
 *
 * This program is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option) any later
 * version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
 * Place - Suite 330, Boston, MA 02111-1307, USA, or go to
 * http://www.gnu.org/copyleft/lesser.txt.
 *
 */

#include "KeosAnimatedMeshKF.h"
#include "KeosException.h"
#include "KeosRoot.h"
#include "KeosRenderSystem.h"
#include "KeosUtil.h"

namespace Keos
{
#define Renderer CRoot::Instance().GetRenderSystem()


  //=======================================================================
  // CAnimatedMeshKF implementation
  //=======================================================================

  //-----------------------------------------------------------------------
  CAnimatedMeshKF::CAnimatedMeshKF(std::vector<CMeshGeom::TVertex> Frames)
  {
    m_Frames = Frames;

    m_nCurrFrame = 0;
    m_nNextFrame = 0;
    m_fInterp = 0.0f;
    m_fPercent = 0.0f;

    m_nCurrentAnimation = 0;
  }

  //-----------------------------------------------------------------------
  CAnimatedMeshKF::~CAnimatedMeshKF()
  {}

  //-----------------------------------------------------------------------
  void CAnimatedMeshKF::SetAnimation(uint nAnimIndex)
  {
    Assert(nAnimIndex < GetNumberOfAnimations());

    m_nCurrentAnimation = nAnimIndex;

    CAnimationInfoKF AnimationInfo = m_AnimationVector[m_nCurrentAnimation];

    if ( m_nCurrFrame < AnimationInfo.Begin )
      m_nCurrFrame = AnimationInfo.Begin;

    if ( m_nCurrFrame > AnimationInfo.End )
      m_nCurrFrame = AnimationInfo.Begin;

    m_nNextFrame = m_nCurrFrame + 1;

    if ( m_nNextFrame >= AnimationInfo.End )
      m_nNextFrame = AnimationInfo.Begin;
  }

  //-----------------------------------------------------------------------
  void CAnimatedMeshKF::LinearInterpolation()
  {
    CMeshGeom* pMeshGeom = GetMeshGeom(0);
    int nOffsetFrame1 = m_nCurrFrame * pMeshGeom->m_VertexBuffer.GetCount();
    int nOffsetFrame2 = m_nNextFrame * pMeshGeom->m_VertexBuffer.GetCount();

    CMeshGeom::TVertex* Vertices = pMeshGeom->m_VertexBuffer.Lock(0, 0, LOCK_WRITEONLY);
    for (uint i = 0; i < pMeshGeom->m_VertexBuffer.GetCount(); i++)
    {
      // Linear interpolation
      Vertices[i].Position = m_Frames[nOffsetFrame1 + i].Position + m_fInterp *
                             (m_Frames[nOffsetFrame2 + i].Position - m_Frames[nOffsetFrame1 + i].Position);
    }
    pMeshGeom->m_VertexBuffer.Unlock();

    m_fInterp += m_fPercent;
  }

  //-----------------------------------------------------------------------
  void CAnimatedMeshKF::Animate( float fPercent )
  {
    CAnimationInfoKF AnimationInfo = m_AnimationVector[m_nCurrentAnimation];

    if ( m_nCurrFrame > AnimationInfo.End )
      m_nCurrFrame = AnimationInfo.Begin;

    m_fPercent = fPercent;
    if ( m_fInterp >= 1.0 )
    {
      m_fInterp = 0.0f;
      m_nCurrFrame++;
      if ( m_nCurrFrame >= AnimationInfo.End )
        m_nCurrFrame = AnimationInfo.Begin;

      m_nNextFrame = m_nCurrFrame + 1;

      if ( m_nNextFrame >= AnimationInfo.End )
        m_nNextFrame = AnimationInfo.Begin;
    }

    LinearInterpolation();
    Render();
  }

  //-----------------------------------------------------------------------
  void CAnimatedMeshKF::AddAnimation(const CAnimationInfoKF& AnimationInfo)
  {
    m_AnimationVector.push_back(AnimationInfo);
  }


} // namespace Keos

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