BL_ModifierDeformer.cpp

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/*
 * $Id: BL_ModifierDeformer.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 "MEM_guardedalloc.h"
#include "BL_ModifierDeformer.h"
#include "CTR_Map.h"
#include "STR_HashedString.h"
#include "RAS_IPolygonMaterial.h"
#include "RAS_MeshObject.h"
#include "PHY_IGraphicController.h"

//#include "BL_ArmatureController.h"
#include "DNA_armature_types.h"
#include "DNA_action_types.h"
#include "DNA_key_types.h"
#include "DNA_mesh_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_ipo_types.h"
#include "DNA_curve_types.h"
#include "DNA_modifier_types.h"
#include "DNA_scene_types.h"
#include "BLI_utildefines.h"
#include "BKE_armature.h"
#include "BKE_action.h"
#include "BKE_key.h"
#include "BKE_ipo.h"
#include "MT_Point3.h"

extern "C"{
        #include "BKE_customdata.h"
        #include "BKE_DerivedMesh.h"
        #include "BKE_lattice.h"
        #include "BKE_modifier.h"
}
 

#include "BLI_blenlib.h"
#include "BLI_math.h"

#define __NLA_DEFNORMALS
//#undef __NLA_DEFNORMALS


BL_ModifierDeformer::~BL_ModifierDeformer()
{
        if (m_dm) {
                // deformedOnly is used as a user counter
                if (--m_dm->deformedOnly == 0) {
                        m_dm->needsFree = 1;
                        m_dm->release(m_dm);
                }
        }
};

RAS_Deformer *BL_ModifierDeformer::GetReplica()
{
        BL_ModifierDeformer *result;

        result = new BL_ModifierDeformer(*this);
        result->ProcessReplica();
        return result;
}

void BL_ModifierDeformer::ProcessReplica()
{
        /* Note! - This is not inherited from PyObjectPlus */
        BL_ShapeDeformer::ProcessReplica();
        if (m_dm)
                // by default try to reuse mesh, deformedOnly is used as a user count
                m_dm->deformedOnly++;
        // this will force an update and if the mesh cannot be reused, a new one will be created
        m_lastModifierUpdate = -1;
}

bool BL_ModifierDeformer::HasCompatibleDeformer(Object *ob)
{
        if (!ob->modifiers.first)
                return false;
        // soft body cannot use mesh modifiers
        if ((ob->gameflag & OB_SOFT_BODY) != 0)
                return false;
        ModifierData* md;
        for (md = (ModifierData*)ob->modifiers.first; md; md = (ModifierData*)md->next) {
                if (modifier_dependsOnTime(md))
                        continue;
                if (!(md->mode & eModifierMode_Realtime))
                        continue;
                /* armature modifier are handled by SkinDeformer, not ModifierDeformer */
                if (md->type == eModifierType_Armature )
                        continue;
                return true;
        }
        return false;
}

bool BL_ModifierDeformer::HasArmatureDeformer(Object *ob)
{
        if (!ob->modifiers.first)
                return false;

        ModifierData* md = (ModifierData*)ob->modifiers.first;
        if(md->type == eModifierType_Armature )
                return true;

        return false;
}

// return a deformed mesh that supports mapping (with a valid CD_ORIGINDEX layer)
struct DerivedMesh* BL_ModifierDeformer::GetPhysicsMesh()
{
        // we need to compute the deformed mesh taking into account the current
        // shape and skin deformers, we cannot just call mesh_create_derived_physics()
        // because that would use the m_transvers already deformed previously by BL_ModifierDeformer::Update(),
        // so restart from scratch by forcing a full update the shape/skin deformers 
        // (will do nothing if there is no such deformer)
        BL_ShapeDeformer::ForceUpdate();
        BL_ShapeDeformer::Update();
        // now apply the modifiers but without those that don't support mapping
        Object* blendobj = m_gameobj->GetBlendObject();
        /* hack: the modifiers require that the mesh is attached to the object
           It may not be the case here because of replace mesh actuator */
        Mesh *oldmesh = (Mesh*)blendobj->data;
        blendobj->data = m_bmesh;
        DerivedMesh *dm = mesh_create_derived_physics(m_scene, blendobj, m_transverts, CD_MASK_MESH);
        /* restore object data */
        blendobj->data = oldmesh;
        /* m_transverts is correct here (takes into account deform only modifiers) */
        /* the derived mesh returned by this function must be released by the caller !!! */
        return dm;
}

bool BL_ModifierDeformer::Update(void)
{
        bool bShapeUpdate = BL_ShapeDeformer::Update();

        if (bShapeUpdate || m_lastModifierUpdate != m_gameobj->GetLastFrame()) {
                // static derived mesh are not updated
                if (m_dm == NULL || m_bDynamic) {
                        /* execute the modifiers */
                        Object* blendobj = m_gameobj->GetBlendObject();
                        /* hack: the modifiers require that the mesh is attached to the object
                           It may not be the case here because of replace mesh actuator */
                        Mesh *oldmesh = (Mesh*)blendobj->data;
                        blendobj->data = m_bmesh;
                        /* execute the modifiers */             
                        DerivedMesh *dm = mesh_create_derived_no_virtual(m_scene, blendobj, m_transverts, CD_MASK_MESH);
                        /* restore object data */
                        blendobj->data = oldmesh;
                        /* free the current derived mesh and replace, (dm should never be NULL) */
                        if (m_dm != NULL) {
                                // HACK! use deformedOnly as a user counter
                                if (--m_dm->deformedOnly == 0) {
                                        m_dm->needsFree = 1;
                                        m_dm->release(m_dm);
                                }
                        }
                        m_dm = dm;
                        // get rid of temporary data
                        m_dm->needsFree = 0;
                        m_dm->release(m_dm);
                        // HACK! use deformedOnly as a user counter
                        m_dm->deformedOnly = 1;
                        /* update the graphic controller */
                        PHY_IGraphicController *ctrl = m_gameobj->GetGraphicController();
                        if (ctrl) {
                                float min_r[3], max_r[3];
                                INIT_MINMAX(min_r, max_r);
                                m_dm->getMinMax(m_dm, min_r, max_r);
                                ctrl->setLocalAabb(min_r, max_r);
                        }
                }
                m_lastModifierUpdate=m_gameobj->GetLastFrame();
                bShapeUpdate = true;
        }
        return bShapeUpdate;
}

bool BL_ModifierDeformer::Apply(RAS_IPolyMaterial *mat)
{
        if (!Update())
                return false;

        // drawing is based on derived mesh, must set it in the mesh slots
        int nmat = m_pMeshObject->NumMaterials();
        for (int imat=0; imat<nmat; imat++) {
                RAS_MeshMaterial *mmat = m_pMeshObject->GetMeshMaterial(imat);
                RAS_MeshSlot **slot = mmat->m_slots[(void*)m_gameobj];
                if(!slot || !*slot)
                        continue;
                (*slot)->m_pDerivedMesh = m_dm;
        }
        return true;
}