BL_ModifierDeformer.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
 * 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.
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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 "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;
}