KX_SoftBodyDeformer.cpp

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/*
 * $Id: KX_SoftBodyDeformer.cpp 36523 2011-05-06 20:18:42Z blendix $
 *
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#if defined(WIN32) && !defined(FREE_WINDOWS)
#pragma warning (disable : 4786)
#endif //WIN32

#include "MT_assert.h"

#include "KX_ConvertPhysicsObject.h"
#include "KX_SoftBodyDeformer.h"
#include "RAS_MeshObject.h"
#include "CTR_Map.h"
#include "CTR_HashedPtr.h"

#ifdef USE_BULLET

#include "CcdPhysicsEnvironment.h"
#include "CcdPhysicsController.h"
#include "BulletSoftBody/btSoftBody.h"

#include "KX_BulletPhysicsController.h"
#include "btBulletDynamicsCommon.h"

void KX_SoftBodyDeformer::Relink(CTR_Map<class CTR_HashedPtr, void*>*map)
{
        void **h_obj = (*map)[m_gameobj];

        if (h_obj) {
                m_gameobj = (BL_DeformableGameObject*)(*h_obj);
                m_pMeshObject = m_gameobj->GetMesh(0);
        } else {
                m_gameobj = NULL;
                m_pMeshObject = NULL;
        }
}

bool KX_SoftBodyDeformer::Apply(class RAS_IPolyMaterial *polymat)
{
        KX_BulletPhysicsController* ctrl = (KX_BulletPhysicsController*) m_gameobj->GetPhysicsController();
        if (!ctrl)
                return false;

        btSoftBody* softBody= ctrl->GetSoftBody();
        if (!softBody)
                return false;

        //printf("apply\n");
        RAS_MeshSlot::iterator it;
        RAS_MeshMaterial *mmat;
        RAS_MeshSlot *slot;
        size_t i;

        // update the vertex in m_transverts
        Update();

        // The vertex cache can only be updated for this deformer:
        // Duplicated objects with more than one ploymaterial (=multiple mesh slot per object)
        // share the same mesh (=the same cache). As the rendering is done per polymaterial
        // cycling through the objects, the entire mesh cache cannot be updated in one shot.
        mmat = m_pMeshObject->GetMeshMaterial(polymat);
        if(!mmat->m_slots[(void*)m_gameobj])
                return true;

        slot = *mmat->m_slots[(void*)m_gameobj];

        // for each array
        for(slot->begin(it); !slot->end(it); slot->next(it)) 
        {
                btSoftBody::tNodeArray&   nodes(softBody->m_nodes);

                int index = 0;
                for(i=it.startvertex; i<it.endvertex; i++,index++) {
                        RAS_TexVert& v = it.vertex[i];
                        btAssert(v.getSoftBodyIndex() >= 0);

                        MT_Point3 pt (
                                nodes[v.getSoftBodyIndex()].m_x.getX(),
                                nodes[v.getSoftBodyIndex()].m_x.getY(),
                                nodes[v.getSoftBodyIndex()].m_x.getZ());
                        v.SetXYZ(pt);

                        MT_Vector3 normal (
                                nodes[v.getSoftBodyIndex()].m_n.getX(),
                                nodes[v.getSoftBodyIndex()].m_n.getY(),
                                nodes[v.getSoftBodyIndex()].m_n.getZ());
                        v.SetNormal(normal);

                }
        }
        return true;
}

#endif