KX_SoftBodyDeformer.cpp

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/*
 * ***** 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
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
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 * 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.
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 * ***** END GPL LICENSE BLOCK *****
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#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