object_lattice.c

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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.
 *
 * Contributor(s): Blender Foundation
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include <stdlib.h>
#include <string.h>
#include <math.h>

#include "MEM_guardedalloc.h"

#include "BLI_listbase.h"
#include "BLI_math.h"
#include "BLI_utildefines.h"

#include "DNA_curve_types.h"
#include "DNA_key_types.h"
#include "DNA_lattice_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"

#include "RNA_access.h"

#include "BKE_context.h"
#include "BKE_depsgraph.h"
#include "BKE_key.h"
#include "BKE_lattice.h"
#include "BKE_mesh.h"

#include "ED_lattice.h"
#include "ED_object.h"
#include "ED_screen.h"
#include "ED_view3d.h"
#include "ED_util.h"

#include "WM_api.h"
#include "WM_types.h"

#include "object_intern.h"

/********************** Load/Make/Free ********************/

void free_editLatt(Object *ob)
{
    Lattice *lt= ob->data;
    
    if(lt->editlatt) {
        Lattice *editlt= lt->editlatt->latt;

        if(editlt->def)
            MEM_freeN(editlt->def);
        if(editlt->dvert)
            free_dverts(editlt->dvert, editlt->pntsu*editlt->pntsv*editlt->pntsw);

        MEM_freeN(editlt);
        MEM_freeN(lt->editlatt);

        lt->editlatt= NULL;
    }
}

void make_editLatt(Object *obedit)
{
    Lattice *lt= obedit->data;
    KeyBlock *actkey;

    free_editLatt(obedit);

    actkey= ob_get_keyblock(obedit);
    if(actkey)
        key_to_latt(actkey, lt);

    lt->editlatt= MEM_callocN(sizeof(EditLatt), "editlatt");
    lt->editlatt->latt= MEM_dupallocN(lt);
    lt->editlatt->latt->def= MEM_dupallocN(lt->def);

    if(lt->dvert) {
        int tot= lt->pntsu*lt->pntsv*lt->pntsw;
        lt->editlatt->latt->dvert = MEM_mallocN (sizeof (MDeformVert)*tot, "Lattice MDeformVert");
        copy_dverts(lt->editlatt->latt->dvert, lt->dvert, tot);
    }

    if(lt->key) lt->editlatt->shapenr= obedit->shapenr;
}

void load_editLatt(Object *obedit)
{
    Lattice *lt, *editlt;
    KeyBlock *actkey;
    BPoint *bp;
    float *fp;
    int tot;

    lt= obedit->data;
    editlt= lt->editlatt->latt;

    if(lt->editlatt->shapenr) {
        actkey= BLI_findlink(&lt->key->block, lt->editlatt->shapenr-1);

        /* active key: vertices */
        tot= editlt->pntsu*editlt->pntsv*editlt->pntsw;
        
        if(actkey->data) MEM_freeN(actkey->data);
        
        fp=actkey->data= MEM_callocN(lt->key->elemsize*tot, "actkey->data");
        actkey->totelem= tot;

        bp= editlt->def;
        while(tot--) {
            copy_v3_v3(fp, bp->vec);
            fp+= 3;
            bp++;
        }
    }
    else {
        MEM_freeN(lt->def);

        lt->def= MEM_dupallocN(editlt->def);

        lt->flag= editlt->flag;

        lt->pntsu= editlt->pntsu;
        lt->pntsv= editlt->pntsv;
        lt->pntsw= editlt->pntsw;
        
        lt->typeu= editlt->typeu;
        lt->typev= editlt->typev;
        lt->typew= editlt->typew;
    }

    if(lt->dvert) {
        free_dverts(lt->dvert, lt->pntsu*lt->pntsv*lt->pntsw);
        lt->dvert= NULL;
    }

    if(editlt->dvert) {
        tot= lt->pntsu*lt->pntsv*lt->pntsw;

        lt->dvert = MEM_mallocN (sizeof (MDeformVert)*tot, "Lattice MDeformVert");
        copy_dverts(lt->dvert, editlt->dvert, tot);
    }
}

/************************** Operators *************************/

void ED_setflagsLatt(Object *obedit, int flag)
{
    Lattice *lt= obedit->data;
    BPoint *bp;
    int a;
    
    bp= lt->editlatt->latt->def;
    
    a= lt->editlatt->latt->pntsu*lt->editlatt->latt->pntsv*lt->editlatt->latt->pntsw;
    
    while(a--) {
        if(bp->hide==0) {
            bp->f1= flag;
        }
        bp++;
    }
}

static int lattice_select_all_exec(bContext *C, wmOperator *op)
{
    Object *obedit= CTX_data_edit_object(C);
    Lattice *lt= obedit->data;
    BPoint *bp;
    int a;
    int action = RNA_enum_get(op->ptr, "action");

    if (action == SEL_TOGGLE) {
        action = SEL_SELECT;

        bp= lt->editlatt->latt->def;
        a= lt->editlatt->latt->pntsu*lt->editlatt->latt->pntsv*lt->editlatt->latt->pntsw;

        while(a--) {
            if(bp->hide==0) {
                if(bp->f1) {
                    action = SEL_DESELECT;
                    break;
                }
            }
            bp++;
        }
    }

    switch (action) {
    case SEL_SELECT:
        ED_setflagsLatt(obedit, 1);
        break;
    case SEL_DESELECT:
        ED_setflagsLatt(obedit, 0);
        break;
    case SEL_INVERT:
        bp= lt->editlatt->latt->def;
        a= lt->editlatt->latt->pntsu*lt->editlatt->latt->pntsv*lt->editlatt->latt->pntsw;

        while(a--) {
            if(bp->hide==0) {
                bp->f1 ^= 1;
            }
            bp++;
        }
        break;
    }

    WM_event_add_notifier(C, NC_GEOM|ND_SELECT, obedit->data);

    return OPERATOR_FINISHED;
}

void LATTICE_OT_select_all(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Select or Deselect All";
    ot->description= "Change selection of all UVW control points";
    ot->idname= "LATTICE_OT_select_all";
    
    /* api callbacks */
    ot->exec= lattice_select_all_exec;
    ot->poll= ED_operator_editlattice;
    
    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;

    WM_operator_properties_select_all(ot);
}

static int make_regular_poll(bContext *C)
{
    Object *ob;

    if(ED_operator_editlattice(C)) return 1;

    ob= CTX_data_active_object(C);
    return (ob && ob->type==OB_LATTICE);
}

static int make_regular_exec(bContext *C, wmOperator *UNUSED(op))
{
    Object *ob= CTX_data_edit_object(C);
    Lattice *lt;
    
    if(ob) {
        lt= ob->data;
        resizelattice(lt->editlatt->latt, lt->pntsu, lt->pntsv, lt->pntsw, NULL);
    }
    else {
        ob= CTX_data_active_object(C);
        lt= ob->data;
        resizelattice(lt, lt->pntsu, lt->pntsv, lt->pntsw, NULL);
    }
    
    DAG_id_tag_update(&ob->id, OB_RECALC_DATA);
    WM_event_add_notifier(C, NC_GEOM|ND_DATA, ob->data);

    return OPERATOR_FINISHED;
}

void LATTICE_OT_make_regular(wmOperatorType *ot)
{
    /* identifiers */
    ot->name= "Make Regular";
    ot->description= "Set UVW control points a uniform distance apart";
    ot->idname= "LATTICE_OT_make_regular";
    
    /* api callbacks */
    ot->exec= make_regular_exec;
    ot->poll= make_regular_poll;
    
    /* flags */
    ot->flag= OPTYPE_REGISTER|OPTYPE_UNDO;
}

/****************************** Mouse Selection *************************/

static void findnearestLattvert__doClosest(void *userData, BPoint *bp, int x, int y)
{
    struct { BPoint *bp; short dist, select; int mval[2]; } *data = userData;
    float temp = abs(data->mval[0]-x) + abs(data->mval[1]-y);
    
    if((bp->f1 & SELECT)==data->select)
        temp += 5;

    if(temp<data->dist) {
        data->dist = temp;

        data->bp = bp;
    }
}

static BPoint *findnearestLattvert(ViewContext *vc, const int mval[2], int sel)
{
        /* sel==1: selected gets a disadvantage */
        /* in nurb and bezt or bp the nearest is written */
        /* return 0 1 2: handlepunt */
    struct { BPoint *bp; short dist, select; int mval[2]; } data = {NULL};

    data.dist = 100;
    data.select = sel;
    data.mval[0]= mval[0];
    data.mval[1]= mval[1];

    ED_view3d_init_mats_rv3d(vc->obedit, vc->rv3d);
    lattice_foreachScreenVert(vc, findnearestLattvert__doClosest, &data);

    return data.bp;
}

int mouse_lattice(bContext *C, const int mval[2], int extend)
{
    ViewContext vc;
    BPoint *bp= NULL;

    view3d_set_viewcontext(C, &vc);
    bp= findnearestLattvert(&vc, mval, 1);

    if(bp) {
        if(extend==0) {
            ED_setflagsLatt(vc.obedit, 0);
            bp->f1 |= SELECT;
        }
        else
            bp->f1 ^= SELECT; /* swap */

        WM_event_add_notifier(C, NC_GEOM|ND_SELECT, vc.obedit->data);

        return 1;
    }

    return 0;
}

/******************************** Undo *************************/

typedef struct UndoLattice {
    BPoint *def;
    int pntsu, pntsv, pntsw;
} UndoLattice;

static void undoLatt_to_editLatt(void *data, void *edata)
{
    UndoLattice *ult= (UndoLattice*)data;
    EditLatt *editlatt= (EditLatt *)edata;
    int a= editlatt->latt->pntsu*editlatt->latt->pntsv*editlatt->latt->pntsw;

    memcpy(editlatt->latt->def, ult->def, a*sizeof(BPoint));
}

static void *editLatt_to_undoLatt(void *edata)
{
    UndoLattice *ult= MEM_callocN(sizeof(UndoLattice), "UndoLattice");
    EditLatt *editlatt= (EditLatt *)edata;
    
    ult->def= MEM_dupallocN(editlatt->latt->def);
    ult->pntsu= editlatt->latt->pntsu;
    ult->pntsv= editlatt->latt->pntsv;
    ult->pntsw= editlatt->latt->pntsw;
    
    return ult;
}

static void free_undoLatt(void *data)
{
    UndoLattice *ult= (UndoLattice*)data;

    if(ult->def) MEM_freeN(ult->def);
    MEM_freeN(ult);
}

static int validate_undoLatt(void *data, void *edata)
{
    UndoLattice *ult= (UndoLattice*)data;
    EditLatt *editlatt= (EditLatt *)edata;

    return (ult->pntsu == editlatt->latt->pntsu &&
            ult->pntsv == editlatt->latt->pntsv &&
            ult->pntsw == editlatt->latt->pntsw);
}

static void *get_editlatt(bContext *C)
{
    Object *obedit= CTX_data_edit_object(C);

    if(obedit && obedit->type==OB_LATTICE) {
        Lattice *lt= obedit->data;
        return lt->editlatt;
    }

    return NULL;
}

/* and this is all the undo system needs to know */
void undo_push_lattice(bContext *C, const char *name)
{
    undo_editmode_push(C, name, get_editlatt, free_undoLatt, undoLatt_to_editLatt, editLatt_to_undoLatt, validate_undoLatt);
}