source/blender/src/editconstraint.c

   1 /**
   2  * $Id$
   3  *
   4  * ***** BEGIN GPL LICENSE BLOCK *****
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * as published by the Free Software Foundation; either version 2
   9  * of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  19  *
  20  * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
  21  * All rights reserved.
  22  *
  23  * The Original Code is: all of this file.
  24  *
  25  * Contributor(s): Joshua Leung
  26  *
  27  * ***** END GPL LICENSE BLOCK *****
  28  */
  29
  30 #include <stdio.h>
  31 #include <string.h>
  32
  33 #include "MEM_guardedalloc.h"
  34
  35 #include "BLI_blenlib.h"
  36 #include "BLI_arithb.h"
  37 #include "BLI_dynstr.h"
  38
  39 #include "DNA_action_types.h"
  40 #include "DNA_armature_types.h"
  41 #include "DNA_constraint_types.h"
  42 #include "DNA_curve_types.h"
  43 #include "DNA_object_types.h"
  44 #include "DNA_scene_types.h"
  45 #include "DNA_screen_types.h"
  46 #include "DNA_text_types.h"
  47 #include "DNA_view3d_types.h"
  48
  49 #include "BKE_action.h"
  50 #include "BKE_armature.h"
  51 #include "BKE_constraint.h"
  52 #include "BKE_depsgraph.h"
  53 #include "BKE_global.h"
  54 #include "BKE_main.h"
  55 #include "BKE_ipo.h"
  56 #include "BKE_object.h"
  57 #include "BKE_utildefines.h"
  58
  59 #include "BIF_editaction.h"
  60 #include "BIF_editarmature.h"
  61 #include "BIF_editconstraint.h"
  62 #include "BIF_poseobject.h"
  63 #include "BIF_interface.h"
  64 #include "BIF_screen.h"
  65 #include "BIF_space.h"
  66 #include "BIF_toolbox.h"
  67
  68 #include "BPY_extern.h"
  69
  70 #include "blendef.h"
  71 #include "nla.h"
  72 #include "mydevice.h"
  73
  74 /* -------------- Get Active Constraint Data ---------------------- */
  75
  76 ListBase *get_active_constraint_channels (Object *ob, int forcevalid)
  77 {
  78         char ipstr[64];
  79
  80         if (ob == NULL)
  81                 return NULL;
  82
  83         /* See if we are a bone constraint */
  84         if (ob->flag & OB_POSEMODE) {
  85                 bActionChannel *achan;
  86                 bPoseChannel *pchan;
  87
  88                 pchan = get_active_posechannel(ob);
  89                 if (pchan) {
  90                         /* Make sure we have an action */
  91                         if (ob->action == NULL) {
  92                                 if (forcevalid == 0)
  93                                         return NULL;
  94
  95                                 ob->action= add_empty_action("Action");
  96                         }
  97
  98                         /* Make sure we have an actionchannel */
  99                         achan = get_action_channel(ob->action, pchan->name);
 100                         if (achan == NULL) {
 101                                 if (forcevalid == 0)
 102                                         return NULL;
 103
 104                                 achan = MEM_callocN (sizeof(bActionChannel), "ActionChannel");
 105
 106                                 strcpy(achan->name, pchan->name);
 107                                 sprintf(ipstr, "%s.%s", ob->action->id.name+2, achan->name);
 108                                 ipstr[23]=0;
 109                                 achan->ipo=     add_ipo(ipstr, ID_AC);
 110
 111                                 BLI_addtail(&ob->action->chanbase, achan);
 112                         }
 113
 114                         return &achan->constraintChannels;
 115                 }
 116                 else
 117                         return NULL;
 118         }
 119         /* else we return object constraints */
 120         else {
 121                 if (ob->ipoflag & OB_ACTION_OB) {
 122                         bActionChannel *achan = get_action_channel(ob->action, "Object");
 123                         if (achan)
 124                                 return &achan->constraintChannels;
 125                         else
 126                                 return NULL;
 127                 }
 128
 129                 return &ob->constraintChannels;
 130         }
 131 }
 132
 133
 134 /* if object in posemode, active bone constraints, else object constraints */
 135 ListBase *get_active_constraints (Object *ob)
 136 {
 137         if (ob == NULL)
 138                 return NULL;
 139
 140         if (ob->flag & OB_POSEMODE) {
 141                 bPoseChannel *pchan;
 142
 143                 pchan = get_active_posechannel(ob);
 144                 if (pchan)
 145                         return &pchan->constraints;
 146         }
 147         else
 148                 return &ob->constraints;
 149
 150         return NULL;
 151 }
 152
 153 /* single constraint */
 154 bConstraint *get_active_constraint (Object *ob)
 155 {
 156         ListBase *lb= get_active_constraints(ob);
 157
 158         if (lb) {
 159                 bConstraint *con;
 160
 161                 for (con= lb->first; con; con=con->next) {
 162                         if (con->flag & CONSTRAINT_ACTIVE)
 163                                 return con;
 164                 }
 165         }
 166
 167         return NULL;
 168 }
 169
 170 /* single channel, for ipo */
 171 bConstraintChannel *get_active_constraint_channel (Object *ob)
 172 {
 173         bConstraint *con;
 174         bConstraintChannel *chan;
 175
 176         if (ob->flag & OB_POSEMODE) {
 177                 if (ob->action) {
 178                         bPoseChannel *pchan;
 179
 180                         pchan = get_active_posechannel(ob);
 181                         if (pchan) {
 182                                 for (con= pchan->constraints.first; con; con= con->next) {
 183                                         if (con->flag & CONSTRAINT_ACTIVE)
 184                                                 break;
 185                                 }
 186
 187                                 if (con) {
 188                                         bActionChannel *achan = get_action_channel(ob->action, pchan->name);
 189                                         if (achan) {
 190                                                 for (chan= achan->constraintChannels.first; chan; chan= chan->next) {
 191                                                         if (!strcmp(chan->name, con->name))
 192                                                                 break;
 193                                                 }
 194                                                 return chan;
 195                                         }
 196                                 }
 197                         }
 198                 }
 199         }
 200         else {
 201                 for (con= ob->constraints.first; con; con= con->next) {
 202                         if (con->flag & CONSTRAINT_ACTIVE)
 203                                 break;
 204                 }
 205
 206                 if (con) {
 207                         ListBase *lb= get_active_constraint_channels(ob, 0);
 208
 209                         if (lb) {
 210                                 for (chan= lb->first; chan; chan= chan->next) {
 211                                         if (!strcmp(chan->name, con->name))
 212                                                 break;
 213                                 }
 214
 215                                 return chan;
 216                         }
 217                 }
 218         }
 219
 220         return NULL;
 221 }
 222
 223 /* -------------- Constraint Management (Add New, Remove, Rename) -------------------- */
 224
 225 /* Creates a new constraint, initialises its data, and returns it */
 226 bConstraint *add_new_constraint (short type)
 227 {
 228         bConstraint *con;
 229         bConstraintTypeInfo *cti;
 230
 231         con = MEM_callocN(sizeof(bConstraint), "Constraint");
 232
 233         /* Set up a generic constraint datablock */
 234         con->type = type;
 235         con->flag |= CONSTRAINT_EXPAND;
 236         con->enforce = 1.0F;
 237         strcpy(con->name, "Const");
 238
 239         /* Load the data for it */
 240         cti = constraint_get_typeinfo(con);
 241         if (cti) {
 242                 con->data = MEM_callocN(cti->size, cti->structName);
 243
 244                 /* only constraints that change any settings need this */
 245                 if (cti->new_data)
 246                         cti->new_data(con->data);
 247         }
 248
 249         return con;
 250 }
 251
 252 /* Adds the given constraint to the Object-level set of constraints for the given Object */
 253 void add_constraint_to_object (bConstraint *con, Object *ob)
 254 {
 255         ListBase *list;
 256         list = &ob->constraints;
 257
 258         if (list) {
 259                 unique_constraint_name(con, list);
 260                 BLI_addtail(list, con);
 261
 262                 if (proxylocked_constraints_owner(ob, NULL))
 263                         con->flag |= CONSTRAINT_PROXY_LOCAL;
 264
 265                 con->flag |= CONSTRAINT_ACTIVE;
 266                 for (con= con->prev; con; con= con->prev)
 267                         con->flag &= ~CONSTRAINT_ACTIVE;
 268         }
 269 }
 270
 271 /* helper function for add_constriant - sets the last target for the active constraint */
 272 static void set_constraint_nth_target (bConstraint *con, Object *target, char subtarget[], int index)
 273 {
 274         bConstraintTypeInfo *cti= constraint_get_typeinfo(con);
 275         ListBase targets = {NULL, NULL};
 276         bConstraintTarget *ct;
 277         int num_targets, i;
 278
 279         if (cti && cti->get_constraint_targets) {
 280                 cti->get_constraint_targets(con, &targets);
 281                 num_targets= BLI_countlist(&targets);
 282
 283                 if (index < 0) {
 284                         if (abs(index) < num_targets)
 285                                 index= num_targets - abs(index);
 286                         else
 287                                 index= num_targets - 1;
 288                 }
 289                 else if (index >= num_targets) {
 290                         index= num_targets - 1;
 291                 }
 292
 293                 for (ct=targets.first, i=0; ct; ct= ct->next, i++) {
 294                         if (i == index) {
 295                                 ct->tar= target;
 296                                 strcpy(ct->subtarget, subtarget);
 297                                 break;
 298                         }
 299                 }
 300
 301                 if (cti->flush_constraint_targets)
 302                         cti->flush_constraint_targets(con, &targets, 0);
 303         }
 304 }
 305
 306 /* context: active object in posemode, active channel, optional selected channel */
 307 void add_constraint (short only_IK)
 308 {
 309         Object *ob= OBACT, *obsel=NULL;
 310         bPoseChannel *pchanact=NULL, *pchansel=NULL;
 311         bConstraint *con=NULL;
 312         Base *base;
 313         short nr;
 314
 315         /* paranoia checks */
 316         if ((ob==NULL) || (ob==G.obedit))
 317                 return;
 318
 319         if ((ob->pose) && (ob->flag & OB_POSEMODE)) {
 320                 bArmature *arm= ob->data;
 321
 322                 /* find active channel */
 323                 pchanact= get_active_posechannel(ob);
 324                 if (pchanact==NULL)
 325                         return;
 326
 327                 /* find selected bone */
 328                 for (pchansel=ob->pose->chanbase.first; pchansel; pchansel=pchansel->next) {
 329                         if (pchansel != pchanact) {
 330                                 if (pchansel->bone->flag & BONE_SELECTED)  {
 331                                         if (pchansel->bone->layer & arm->layer)
 332                                                 break;
 333                                 }
 334                         }
 335                 }
 336         }
 337
 338         /* find selected object */
 339         for (base= FIRSTBASE; base; base= base->next) {
 340                 if ((TESTBASE(base)) && (base->object!=ob))
 341                         obsel= base->object;
 342         }
 343
 344         /* the only_IK caller has checked for posemode! */
 345         if (only_IK) {
 346                 for (con= pchanact->constraints.first; con; con= con->next) {
 347                         if (con->type==CONSTRAINT_TYPE_KINEMATIC) break;
 348                 }
 349                 if (con) {
 350                         error("Pose Channel already has IK");
 351                         return;
 352                 }
 353
 354                 if (pchansel)
 355                         nr= pupmenu("Add IK Constraint%t|To Active Bone%x10");
 356                 else if (obsel)
 357                         nr= pupmenu("Add IK Constraint%t|To Active Object%x10");
 358                 else
 359                         nr= pupmenu("Add IK Constraint%t|To New Empty Object%x10|Without Target%x11");
 360         }
 361         else {
 362                 if (pchanact) {
 363                         if (pchansel)
 364                                 nr= pupmenu("Add Constraint to Active Bone%t|Child Of%x19|Transformation%x20|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|Limit Distance%x21|%l|Track To%x3|Floor%x4|Locked Track%x5|Stretch To%x7|%l|Action%x16|Script%x18");
 365                         else if ((obsel) && (obsel->type==OB_CURVE))
 366                                 nr= pupmenu("Add Constraint to Active Object%t|Child Of%x19|Transformation%x20|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|Limit Distance%x21|%l|Track To%x3|Floor%x4|Locked Track%x5|Follow Path%x6|Clamp To%x17|Stretch To%x7|%l|Action%x16|Script%x18");
 367                         else if (obsel)
 368                                 nr= pupmenu("Add Constraint to Active Object%t|Child Of%x19|Transformation%x20|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|Limit Distance%x21|%l|Track To%x3|Floor%x4|Locked Track%x5|Stretch To%x7|%l|Action%x16|Script%x18");
 369                         else
 370                                 nr= pupmenu("Add Constraint to New Empty Object%t|Child Of%x19|Transformation%x20|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|Limit Distance%x21|%l|Track To%x3|Floor%x4|Locked Track%x5|Stretch To%x7|%l|Action%x16|Script%x18");
 371                 }
 372                 else {
 373                         if ((obsel) && (obsel->type==OB_CURVE))
 374                                 nr= pupmenu("Add Constraint to Active Object%t|Child Of%x19|Transformation%x20|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|Limit Distance%x21|%l|Track To%x3|Floor%x4|Locked Track%x5|Follow Path%x6|Clamp To%x17|%l|Action%x16|Script%x18");
 375                         else if (obsel)
 376                                 nr= pupmenu("Add Constraint to Active Object%t|Child Of%x19|Transformation%x20|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|Limit Distance%x21|%l|Track To%x3|Floor%x4|Locked Track%x5|%l|Action%x16|Script%x18");
 377                         else
 378                                 nr= pupmenu("Add Constraint to New Empty Object%t|Child Of%x19|Transformation%x20|%l|Copy Location%x1|Copy Rotation%x2|Copy Scale%x8|%l|Limit Location%x13|Limit Rotation%x14|Limit Scale%x15|Limit Distance%x21|%l|Track To%x3|Floor%x4|Locked Track%x5|%l|Action%x16|Script%x18");
 379                 }
 380         }
 381
 382         if (nr < 1) return;
 383
 384         /* handle IK separate */
 385         if (nr==10 || nr==11) {
 386                 /* ik - prevent weird chains... */
 387                 if (pchansel) {
 388                         bPoseChannel *pchan= pchanact;
 389                         while (pchan) {
 390                                 if (pchan==pchansel) break;
 391                                 pchan= pchan->parent;
 392                         }
 393                         if (pchan) {
 394                                 error("IK root cannot be linked to IK tip");
 395                                 return;
 396                         }
 397
 398                         pchan= pchansel;
 399                         while (pchan) {
 400                                 if (pchan==pchanact) break;
 401                                 pchan= pchan->parent;
 402                         }
 403                         if (pchan) {
 404                                 error("IK tip cannot be linked to IK root");
 405                                 return;
 406                         }
 407                 }
 408
 409                 con = add_new_constraint(CONSTRAINT_TYPE_KINEMATIC);
 410                 BLI_addtail(&pchanact->constraints, con);
 411                 unique_constraint_name(con, &pchanact->constraints);
 412                 pchanact->constflag |= PCHAN_HAS_IK;    /* for draw, but also for detecting while pose solving */
 413                 if (nr==11)
 414                         pchanact->constflag |= PCHAN_HAS_TARGET;
 415                 if (proxylocked_constraints_owner(ob, pchanact))
 416                         con->flag |= CONSTRAINT_PROXY_LOCAL;
 417         }
 418         else {
 419                 /* normal constraints - add data */
 420                 if (nr==1) con = add_new_constraint(CONSTRAINT_TYPE_LOCLIKE);
 421                 else if (nr==2) con = add_new_constraint(CONSTRAINT_TYPE_ROTLIKE);
 422                 else if (nr==3) con = add_new_constraint(CONSTRAINT_TYPE_TRACKTO);
 423                 else if (nr==4) con = add_new_constraint(CONSTRAINT_TYPE_MINMAX);
 424                 else if (nr==5) con = add_new_constraint(CONSTRAINT_TYPE_LOCKTRACK);
 425                 else if (nr==6) {
 426                         Curve *cu= obsel->data;
 427                         cu->flag |= CU_PATH;
 428                         con = add_new_constraint(CONSTRAINT_TYPE_FOLLOWPATH);
 429                 }
 430                 else if (nr==7) con = add_new_constraint(CONSTRAINT_TYPE_STRETCHTO);
 431                 else if (nr==8) con = add_new_constraint(CONSTRAINT_TYPE_SIZELIKE);
 432                 else if (nr==13) con = add_new_constraint(CONSTRAINT_TYPE_LOCLIMIT);
 433                 else if (nr==14) con = add_new_constraint(CONSTRAINT_TYPE_ROTLIMIT);
 434                 else if (nr==15) con = add_new_constraint(CONSTRAINT_TYPE_SIZELIMIT);
 435                 else if (nr==16) {
 436                         /* TODO: add a popup-menu to display list of available actions to use (like for pyconstraints) */
 437                         con = add_new_constraint(CONSTRAINT_TYPE_ACTION);
 438                 }
 439                 else if (nr==17) {
 440                         Curve *cu= obsel->data;
 441                         cu->flag |= CU_PATH;
 442                         con = add_new_constraint(CONSTRAINT_TYPE_CLAMPTO);
 443                 }
 444                 else if (nr==18) {
 445                         char *menustr;
 446                         int scriptint= 0;
 447
 448                         /* popup a list of usable scripts */
 449                         menustr = buildmenu_pyconstraints(NULL, &scriptint);
 450                         scriptint = pupmenu(menustr);
 451                         MEM_freeN(menustr);
 452
 453                         /* only add constraint if a script was chosen */
 454                         if (scriptint) {
 455                                 /* add constraint */
 456                                 con = add_new_constraint(CONSTRAINT_TYPE_PYTHON);
 457                                 validate_pyconstraint_cb(con->data, &scriptint);
 458
 459                                 /* make sure target allowance is set correctly */
 460                                 BPY_pyconstraint_update(ob, con);
 461                         }
 462                 }
 463                 else if (nr==19) {
 464                         con = add_new_constraint(CONSTRAINT_TYPE_CHILDOF);
 465
 466                         /* if this constraint is being added to a posechannel, make sure
 467                          * the constraint gets evaluated in pose-space
 468                          */
 469                         if (pchanact) {
 470                                 con->ownspace = CONSTRAINT_SPACE_POSE;
 471                                 con->flag |= CONSTRAINT_SPACEONCE;
 472                         }
 473                 }
 474                 else if (nr==20) con = add_new_constraint(CONSTRAINT_TYPE_TRANSFORM);
 475                 else if (nr==21) con = add_new_constraint(CONSTRAINT_TYPE_DISTLIMIT);
 476
 477                 if (con==NULL) return;  /* paranoia */
 478
 479                 if (pchanact) {
 480                         BLI_addtail(&pchanact->constraints, con);
 481                         unique_constraint_name(con, &pchanact->constraints);
 482                         pchanact->constflag |= PCHAN_HAS_CONST; /* for draw */
 483                         if (proxylocked_constraints_owner(ob, pchanact))
 484                                 con->flag |= CONSTRAINT_PROXY_LOCAL;
 485                 }
 486                 else {
 487                         BLI_addtail(&ob->constraints, con);
 488                         unique_constraint_name(con, &ob->constraints);
 489                         if (proxylocked_constraints_owner(ob, NULL))
 490                                 con->flag |= CONSTRAINT_PROXY_LOCAL;
 491                 }
 492         }
 493
 494         /* set the target */
 495         if (pchansel) {
 496                 set_constraint_nth_target(con, ob, pchansel->name, 0);
 497         }
 498         else if (obsel) {
 499                 set_constraint_nth_target(con, obsel, "", 0);
 500         }
 501         else if (ELEM4(nr, 11, 13, 14, 15)==0) {        /* add new empty as target */
 502                 Base *base= BASACT, *newbase;
 503                 Object *obt;
 504
 505                 obt= add_object(OB_EMPTY);
 506                 /* set layers OK */
 507                 newbase= BASACT;
 508                 newbase->lay= base->lay;
 509                 obt->lay= newbase->lay;
 510
 511                 /* transform cent to global coords for loc */
 512                 if (pchanact) {
 513                         if (only_IK)
 514                                 VecMat4MulVecfl(obt->loc, ob->obmat, pchanact->pose_tail);
 515                         else
 516                                 VecMat4MulVecfl(obt->loc, ob->obmat, pchanact->pose_head);
 517                 }
 518                 else
 519                         VECCOPY(obt->loc, ob->obmat[3]);
 520
 521                 set_constraint_nth_target(con, obt, "", 0);
 522
 523                 /* restore, add_object sets active */
 524                 BASACT= base;
 525                 base->flag |= SELECT;
 526         }
 527
 528         /* active flag */
 529         con->flag |= CONSTRAINT_ACTIVE;
 530         for (con= con->prev; con; con= con->prev)
 531                 con->flag &= ~CONSTRAINT_ACTIVE;
 532
 533         DAG_scene_sort(G.scene);                // sort order of objects
 534
 535         if (pchanact) {
 536                 ob->pose->flag |= POSE_RECALC;  // sort pose channels
 537                 DAG_object_flush_update(G.scene, ob, OB_RECALC_DATA);   // and all its relations
 538         }
 539         else
 540                 DAG_object_flush_update(G.scene, ob, OB_RECALC_OB);     // and all its relations
 541
 542         allqueue(REDRAWVIEW3D, 0);
 543         allqueue(REDRAWBUTSOBJECT, 0);
 544         allqueue(REDRAWBUTSEDIT, 0);
 545         allqueue(REDRAWOOPS, 0);
 546
 547         if (only_IK)
 548                 BIF_undo_push("Add IK Constraint");
 549         else
 550                 BIF_undo_push("Add Constraint");
 551
 552 }
 553
 554 /* Remove all constraints from the active object */
 555 void ob_clear_constraints (void)
 556 {
 557         Object *ob= OBACT;
 558
 559         /* paranoia checks */
 560         if ((ob==NULL) || (ob==G.obedit) || (ob->flag & OB_POSEMODE))
 561                 return;
 562
 563         /* get user permission */
 564         if (okee("Clear Constraints")==0)
 565                 return;
 566
 567         /* do freeing */
 568         free_constraints(&ob->constraints);
 569
 570         /* do updates */
 571         DAG_object_flush_update(G.scene, ob, OB_RECALC_OB);
 572
 573         allqueue(REDRAWVIEW3D, 0);
 574         allqueue(REDRAWBUTSOBJECT, 0);
 575         allqueue(REDRAWOOPS, 0);
 576
 577         BIF_undo_push("Clear Constraint(s)");
 578 }
 579
 580 /* Rename the given constraint
 581  *      - con already has the new name
 582  */
 583 void rename_constraint (Object *ob, bConstraint *con, char *oldname)
 584 {
 585         bConstraint *tcon;
 586         bConstraintChannel *conchan;
 587         ListBase *conlist= NULL;
 588         int from_object= 0;
 589         char *channame="";
 590
 591         /* get context by searching for con (primitive...) */
 592         for (tcon= ob->constraints.first; tcon; tcon= tcon->next) {
 593                 if (tcon==con)
 594                         break;
 595         }
 596
 597         if (tcon) {
 598                 conlist= &ob->constraints;
 599                 channame= "Object";
 600                 from_object= 1;
 601         }
 602         else if (ob->pose) {
 603                 bPoseChannel *pchan;
 604
 605                 for (pchan=ob->pose->chanbase.first; pchan; pchan=pchan->next) {
 606                         for (tcon= pchan->constraints.first; tcon; tcon= tcon->next) {
 607                                 if (tcon==con)
 608                                         break;
 609                         }
 610                         if (tcon)
 611                                 break;
 612                 }
 613
 614                 if (tcon) {
 615                         conlist= &pchan->constraints;
 616                         channame= pchan->name;
 617                 }
 618         }
 619
 620         if (conlist==NULL) {
 621                 printf("rename constraint failed\n");   /* should not happen in UI */
 622                 return;
 623         }
 624
 625         /* first make sure it's a unique name within context */
 626         unique_constraint_name (con, conlist);
 627
 628         /* own channels */
 629         if (from_object) {
 630                 for (conchan= ob->constraintChannels.first; conchan; conchan= conchan->next) {
 631                         if ( strcmp(oldname, conchan->name)==0 )
 632                                 BLI_strncpy(conchan->name, con->name, sizeof(conchan->name));
 633                 }
 634         }
 635
 636         /* own action */
 637         if (ob->action) {
 638                 bActionChannel *achan= get_action_channel(ob->action, channame);
 639                 if (achan) {
 640                         conchan= get_constraint_channel(&achan->constraintChannels, oldname);
 641                         if (conchan)
 642                                 BLI_strncpy(conchan->name, con->name, sizeof(conchan->name));
 643                 }
 644         }
 645 }
 646
 647
 648 /* ------------- Constraint Sanity Testing ------------------- */
 649
 650 /* checks validity of object pointers, and NULLs,
 651  * if Bone doesnt exist it sets the CONSTRAINT_DISABLE flag
 652  */
 653 static void test_constraints (Object *owner, const char substring[])
 654 {
 655         bConstraint *curcon;
 656         ListBase *conlist= NULL;
 657         int type;
 658
 659         if (owner==NULL) return;
 660
 661         /* Check parents */
 662         if (strlen(substring)) {
 663                 switch (owner->type) {
 664                         case OB_ARMATURE:
 665                                 type = CONSTRAINT_OBTYPE_BONE;
 666                                 break;
 667                         default:
 668                                 type = CONSTRAINT_OBTYPE_OBJECT;
 669                                 break;
 670                 }
 671         }
 672         else
 673                 type = CONSTRAINT_OBTYPE_OBJECT;
 674
 675         /* Get the constraint list for this object */
 676         switch (type) {
 677                 case CONSTRAINT_OBTYPE_OBJECT:
 678                         conlist = &owner->constraints;
 679                         break;
 680                 case CONSTRAINT_OBTYPE_BONE:
 681                         {
 682                                 Bone *bone;
 683                                 bPoseChannel *chan;
 684
 685                                 bone = get_named_bone( ((bArmature *)owner->data), substring );
 686                                 chan = get_pose_channel(owner->pose, substring);
 687                                 if (bone && chan) {
 688                                         conlist = &chan->constraints;
 689                                 }
 690                         }
 691                         break;
 692         }
 693
 694         /* Check all constraints - is constraint valid? */
 695         if (conlist) {
 696                 for (curcon = conlist->first; curcon; curcon=curcon->next) {
 697                         bConstraintTypeInfo *cti= constraint_get_typeinfo(curcon);
 698                         ListBase targets = {NULL, NULL};
 699                         bConstraintTarget *ct;
 700
 701                         /* clear disabled-flag first */
 702                         curcon->flag &= ~CONSTRAINT_DISABLE;
 703
 704                         /* Check specialised data (settings) for constraints that need this */
 705                         if (curcon->type == CONSTRAINT_TYPE_PYTHON) {
 706                                 bPythonConstraint *data = curcon->data;
 707
 708                                 /* is there are valid script? */
 709                                 if (data->text == NULL) {
 710                                         curcon->flag |= CONSTRAINT_DISABLE;
 711                                 }
 712                                 else if (BPY_is_pyconstraint(data->text)==0) {
 713                                         curcon->flag |= CONSTRAINT_DISABLE;
 714                                 }
 715                                 else {
 716                                         /* does the constraint require target input... also validates targets */
 717                                         BPY_pyconstraint_update(owner, curcon);
 718                                 }
 719
 720                                 /* targets have already been checked for this */
 721                                 continue;
 722                         }
 723                         else if (curcon->type == CONSTRAINT_TYPE_KINEMATIC) {
 724                                 bKinematicConstraint *data = curcon->data;
 725
 726                                 /* bad: we need a separate set of checks here as poletarget is
 727                                  *              optional... otherwise poletarget must exist too or else
 728                                  *              the constraint is deemed invalid
 729                                  */
 730                                 if (exist_object(data->tar) == 0) {
 731                                         data->tar = NULL;
 732                                         curcon->flag |= CONSTRAINT_DISABLE;
 733                                 }
 734                                 else if (data->tar == owner) {
 735                                         if (!get_named_bone(get_armature(owner), data->subtarget)) {
 736                                                 curcon->flag |= CONSTRAINT_DISABLE;
 737                                         }
 738                                 }
 739
 740                                 if (data->poletar) {
 741                                         if (exist_object(data->poletar) == 0) {
 742                                                 data->poletar = NULL;
 743                                                 curcon->flag |= CONSTRAINT_DISABLE;
 744                                         }
 745                                         else if (data->poletar == owner) {
 746                                                 if (!get_named_bone(get_armature(owner), data->polesubtarget)) {
 747                                                         curcon->flag |= CONSTRAINT_DISABLE;
 748                                                 }
 749                                         }
 750                                 }
 751
 752                                 /* targets have already been checked for this */
 753                                 continue;
 754                         }
 755                         else if (curcon->type == CONSTRAINT_TYPE_ACTION) {
 756                                 bActionConstraint *data = curcon->data;
 757
 758                                 /* validate action */
 759                                 if (data->act == NULL)
 760                                         curcon->flag |= CONSTRAINT_DISABLE;
 761                         }
 762                         else if (curcon->type == CONSTRAINT_TYPE_FOLLOWPATH) {
 763                                 bFollowPathConstraint *data = curcon->data;
 764
 765                                 /* don't allow track/up axes to be the same */
 766                                 if (data->upflag==data->trackflag)
 767                                         curcon->flag |= CONSTRAINT_DISABLE;
 768                                 if (data->upflag+3==data->trackflag)
 769                                         curcon->flag |= CONSTRAINT_DISABLE;
 770                         }
 771                         else if (curcon->type == CONSTRAINT_TYPE_TRACKTO) {
 772                                 bTrackToConstraint *data = curcon->data;
 773
 774                                 /* don't allow track/up axes to be the same */
 775                                 if (data->reserved2==data->reserved1)
 776                                         curcon->flag |= CONSTRAINT_DISABLE;
 777                                 if (data->reserved2+3==data->reserved1)
 778                                         curcon->flag |= CONSTRAINT_DISABLE;
 779                         }
 780                         else if (curcon->type == CONSTRAINT_TYPE_LOCKTRACK) {
 781                                 bLockTrackConstraint *data = curcon->data;
 782
 783                                 if (data->lockflag==data->trackflag)
 784                                         curcon->flag |= CONSTRAINT_DISABLE;
 785                                 if (data->lockflag+3==data->trackflag)
 786                                         curcon->flag |= CONSTRAINT_DISABLE;
 787                         }
 788
 789                         /* Check targets for constraints */
 790                         if (cti && cti->get_constraint_targets) {
 791                                 cti->get_constraint_targets(curcon, &targets);
 792
 793                                 /* disable and clear constraints targets that are incorrect */
 794                                 for (ct= targets.first; ct; ct= ct->next) {
 795                                         /* general validity checks (for those constraints that need this) */
 796                                         if (exist_object(ct->tar) == 0) {
 797                                                 ct->tar = NULL;
 798                                                 curcon->flag |= CONSTRAINT_DISABLE;
 799                                         }
 800                                         else if (ct->tar == owner) {
 801                                                 if (!get_named_bone(get_armature(owner), ct->subtarget)) {
 802                                                         curcon->flag |= CONSTRAINT_DISABLE;
 803                                                 }
 804                                         }
 805
 806                                         /* target checks for specific constraints */
 807                                         if (ELEM(curcon->type, CONSTRAINT_TYPE_FOLLOWPATH, CONSTRAINT_TYPE_CLAMPTO)) {
 808                                                 if (ct->tar) {
 809                                                         if (ct->tar->type != OB_CURVE) {
 810                                                                 ct->tar= NULL;
 811                                                                 curcon->flag |= CONSTRAINT_DISABLE;
 812                                                         }
 813                                                         else {
 814                                                                 Curve *cu= ct->tar->data;
 815
 816                                                                 /* auto-set 'Path' setting on curve so this works  */
 817                                                                 cu->flag |= CU_PATH;
 818                                                         }
 819                                                 }
 820                                         }
 821                                 }
 822
 823                                 /* free any temporary targets */
 824                                 if (cti->flush_constraint_targets)
 825                                         cti->flush_constraint_targets(curcon, &targets, 0);
 826                         }
 827                 }
 828         }
 829 }
 830
 831 static void test_bonelist_constraints (Object *owner, ListBase *list)
 832 {
 833         Bone *bone;
 834
 835         for (bone = list->first; bone; bone = bone->next) {
 836                 test_constraints(owner, bone->name);
 837                 test_bonelist_constraints(owner, &bone->childbase);
 838         }
 839 }
 840
 841 void object_test_constraints (Object *owner)
 842 {
 843         test_constraints(owner, "");
 844
 845         if (owner->type==OB_ARMATURE) {
 846                 bArmature *arm= get_armature(owner);
 847
 848                 if (arm)
 849                         test_bonelist_constraints(owner, &arm->bonebase);
 850         }
 851 }
 852
 853 /* ********************** CONSTRAINT-SPECIFIC STUFF ********************* */
 854 /* ------------- PyConstraints ------------------ */
 855
 856 /* this callback sets the text-file to be used for selected menu item */
 857 void validate_pyconstraint_cb (void *arg1, void *arg2)
 858 {
 859         bPythonConstraint *data = arg1;
 860         Text *text= NULL;
 861         int index = *((int *)arg2);
 862         int i;
 863
 864         /* exception for no script */
 865         if (index) {
 866                 /* innovative use of a for...loop to search */
 867                 for (text=G.main->text.first, i=1; text && index!=i; i++, text=text->id.next);
 868         }
 869         data->text = text;
 870 }
 871
 872 /* this returns a string for the list of usable pyconstraint script names */
 873 char *buildmenu_pyconstraints (Text *con_text, int *pyconindex)
 874 {
 875         DynStr *pupds= BLI_dynstr_new();
 876         Text *text;
 877         char *str;
 878         char buf[64];
 879         int i;
 880
 881         /* add title first */
 882         sprintf(buf, "Scripts: %%t|[None]%%x0|");
 883         BLI_dynstr_append(pupds, buf);
 884
 885         /* init active-index first */
 886         if (con_text == NULL)
 887                 *pyconindex= 0;
 888
 889         /* loop through markers, adding them */
 890         for (text=G.main->text.first, i=1; text; i++, text=text->id.next) {
 891                 /* this is important to ensure that right script is shown as active */
 892                 if (text == con_text) *pyconindex = i;
 893
 894                 /* only include valid pyconstraint scripts */
 895                 if (BPY_is_pyconstraint(text)) {
 896                         BLI_dynstr_append(pupds, text->id.name+2);
 897
 898                         sprintf(buf, "%%x%d", i);
 899                         BLI_dynstr_append(pupds, buf);
 900
 901                         if (text->id.next)
 902                                 BLI_dynstr_append(pupds, "|");
 903                 }
 904         }
 905
 906         /* convert to normal MEM_malloc'd string */
 907         str= BLI_dynstr_get_cstring(pupds);
 908         BLI_dynstr_free(pupds);
 909
 910         return str;
 911 }
 912
 913 /* this callback gets called when the 'refresh' button of a pyconstraint gets pressed */
 914 void update_pyconstraint_cb (void *arg1, void *arg2)
 915 {
 916         Object *owner= (Object *)arg1;
 917         bConstraint *con= (bConstraint *)arg2;
 918
 919         if (owner && con)
 920                 BPY_pyconstraint_update(owner, con);
 921 }
 922
 923 /* ------------- Child-Of Constraint ------------------ */
 924
 925 /* ChildOf Constraint - set inverse callback */
 926 void childof_const_setinv (void *conv, void *unused)
 927 {
 928         bConstraint *con= (bConstraint *)conv;
 929         bChildOfConstraint *data= (bChildOfConstraint *)con->data;
 930         Object *ob= OBACT;
 931         bPoseChannel *pchan= NULL;
 932
 933         /* try to find a pose channel */
 934         if (ob && ob->pose)
 935                 pchan= get_active_posechannel(ob);
 936
 937         /* calculate/set inverse matrix */
 938         if (pchan) {
 939                 float pmat[4][4], cinf;
 940                 float imat[4][4], tmat[4][4];
 941
 942                 /* make copy of pchan's original pose-mat (for use later) */
 943                 Mat4CpyMat4(pmat, pchan->pose_mat);
 944
 945                 /* disable constraint for pose to be solved without it */
 946                 cinf= con->enforce;
 947                 con->enforce= 0.0f;
 948
 949                 /* solve pose without constraint */
 950                 where_is_pose(ob);
 951
 952                 /* determine effect of constraint by removing the newly calculated
 953                  * pchan->pose_mat from the original pchan->pose_mat, thus determining
 954                  * the effect of the constraint
 955                  */
 956                 Mat4Invert(imat, pchan->pose_mat);
 957                 Mat4MulMat4(tmat, imat, pmat);
 958                 Mat4Invert(data->invmat, tmat);
 959
 960                 /* recalculate pose with new inv-mat */
 961                 con->enforce= cinf;
 962                 where_is_pose(ob);
 963         }
 964         else if (ob) {
 965                 /* use what_does_parent to find inverse - just like for normal parenting.
 966                  * NOTE: what_does_parent uses a static workob defined in object.c
 967                  */
 968                 what_does_parent(ob);
 969                 Mat4Invert(data->invmat, workob.obmat);
 970         }
 971         else
 972                 Mat4One(data->invmat);
 973 }
 974
 975 /* ChildOf Constraint - clear inverse callback */
 976 void childof_const_clearinv (void *conv, void *unused)
 977 {
 978         bConstraint *con= (bConstraint *)conv;
 979         bChildOfConstraint *data= (bChildOfConstraint *)con->data;
 980
 981         /* simply clear the matrix */
 982         Mat4One(data->invmat);
 983 }