1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064 1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139
|
/*
*
* Copyright (C) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library 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
* Lesser General Public License for more details.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/NoticeExplan/
*
*/
/*
* Copyright (C) 1992 Silicon Graphics, Inc.
*
_______________________________________________________________________
______________ S I L I C O N G R A P H I C S I N C . ____________
|
| $Revision: 1.2 $
|
| Classes:
| SoTabPlaneDragger
|
| Author(s): Paul Isaacs, Howard Look
|
______________ S I L I C O N G R A P H I C S I N C . ____________
_______________________________________________________________________
*/
#include <Inventor/SbLinear.h>
#include <Inventor/SoDB.h>
#include <Inventor/SoPath.h>
#include <Inventor/SoPickedPoint.h>
#include <Inventor/events/SoEvent.h>
#include <Inventor/events/SoKeyboardEvent.h>
#include <Inventor/sensors/SoFieldSensor.h>
#include <Inventor/actions/SoGLRenderAction.h>
#include <Inventor/actions/SoHandleEventAction.h>
#include <Inventor/elements/SoCacheElement.h>
#include <Inventor/elements/SoProjectionMatrixElement.h>
#include <Inventor/elements/SoViewingMatrixElement.h>
#include <Inventor/elements/SoViewportRegionElement.h>
#include <Inventor/nodes/SoCoordinate3.h>
#include <Inventor/nodes/SoIndexedFaceSet.h>
#include <Inventor/nodes/SoMaterial.h>
#include <Inventor/nodes/SoMaterialBinding.h>
#include <Inventor/nodes/SoNormalBinding.h>
#include <Inventor/nodes/SoNormal.h>
#include <Inventor/nodes/SoSeparator.h>
#include <Inventor/nodes/SoShapeHints.h>
#include <Inventor/nodes/SoSwitch.h>
#include <Inventor/nodes/SoTransform.h>
#include <Inventor/draggers/SoTabPlaneDragger.h>
#include "geom/SoTabPlaneDraggerGeom.h"
#ifndef __sgi
#define _ABS(x) ((x) < 0 ? -(x) : (x))
#endif // !__sgi
SO_KIT_SOURCE(SoTabPlaneDragger);
////////////////////////////////////////////////////////////////////////
//
// Description:
// Constructors. Each constructor calls constructorSub(), which
// does work that is common to each.
//
// Use: public
//
////////////////////////////////////////////////////////////////////////
// Default constructor.
SoTabPlaneDragger::SoTabPlaneDragger()
{
SO_KIT_CONSTRUCTOR(SoTabPlaneDragger);
isBuiltIn = TRUE;
SO_KIT_ADD_CATALOG_ENTRY( planeSwitch, SoSwitch, TRUE,
geomSeparator, , FALSE );
SO_KIT_ADD_CATALOG_ENTRY( translator, SoSeparator, TRUE,
planeSwitch, , TRUE );
SO_KIT_ADD_CATALOG_ENTRY( scaleTabs, SoSeparator, TRUE,
planeSwitch, , FALSE );
SO_KIT_ADD_CATALOG_ENTRY( scaleTabMaterial, SoMaterial, TRUE,
scaleTabs, , TRUE );
SO_KIT_ADD_CATALOG_ENTRY( scaleTabHints, SoShapeHints, TRUE,
scaleTabs, , TRUE );
SO_KIT_ADD_CATALOG_ENTRY( scaleTabMaterialBinding, SoMaterialBinding, TRUE,
scaleTabs, , FALSE );
SO_KIT_ADD_CATALOG_ENTRY( scaleTabNormalBinding, SoNormalBinding, TRUE,
scaleTabs, , FALSE );
SO_KIT_ADD_CATALOG_ENTRY( scaleTabNormal, SoNormal, TRUE,
scaleTabs, , FALSE );
SO_KIT_ADD_CATALOG_ENTRY( edgeScaleCoords, SoCoordinate3, TRUE,
scaleTabs, , FALSE );
SO_KIT_ADD_CATALOG_ENTRY( edgeScaleTab0, SoIndexedFaceSet, TRUE,
scaleTabs, , FALSE );
SO_KIT_ADD_CATALOG_ENTRY( edgeScaleTab1, SoIndexedFaceSet, TRUE,
scaleTabs, , FALSE );
SO_KIT_ADD_CATALOG_ENTRY( edgeScaleTab2, SoIndexedFaceSet, TRUE,
scaleTabs, , FALSE );
SO_KIT_ADD_CATALOG_ENTRY( edgeScaleTab3, SoIndexedFaceSet, TRUE,
scaleTabs, , FALSE );
SO_KIT_ADD_CATALOG_ENTRY( cornerScaleCoords, SoCoordinate3, TRUE,
scaleTabs, , FALSE );
SO_KIT_ADD_CATALOG_ENTRY( cornerScaleTab0, SoIndexedFaceSet, TRUE,
scaleTabs, , FALSE );
SO_KIT_ADD_CATALOG_ENTRY( cornerScaleTab1, SoIndexedFaceSet, TRUE,
scaleTabs, , FALSE );
SO_KIT_ADD_CATALOG_ENTRY( cornerScaleTab2, SoIndexedFaceSet, TRUE,
scaleTabs, , FALSE );
SO_KIT_ADD_CATALOG_ENTRY( cornerScaleTab3, SoIndexedFaceSet, TRUE,
scaleTabs, , FALSE );
if (SO_KIT_IS_FIRST_INSTANCE())
readDefaultParts("tabPlaneDragger.iv", geomBuffer, sizeof(geomBuffer));
SO_KIT_ADD_FIELD(translation, (0.0, 0.0, 0.0));
SO_KIT_ADD_FIELD(scaleFactor, (1.0, 1.0, 1.0));
SO_KIT_INIT_INSTANCE();
// Create All the parts...
setPartAsDefault("translator", "tabPlaneTranslator");
setPartAsDefault("scaleTabMaterial",
"tabPlaneScaleTabMaterial");
setPartAsDefault("scaleTabHints", "tabPlaneScaleTabHints");
// Initialize the materialBinding part
SoMaterialBinding *mb = new SoMaterialBinding;
mb->value = SoMaterialBinding::OVERALL;
setAnyPartAsDefault("scaleTabMaterialBinding", mb );
// Initialize the normalBinding part
SoNormalBinding *nb = new SoNormalBinding;
nb->value = SoNormalBinding::OVERALL;
setAnyPartAsDefault("scaleTabNormalBinding", nb );
// Initialize the normal part
SoNormal *nrm = new SoNormal;
nrm->vector = SbVec3f( 0, 0, 1);
setAnyPartAsDefault("scaleTabNormal", nrm );
// Initialize the coordinate nodes.
SbVec3f *pts;
SoCoordinate3 *crdn;
crdn = SO_GET_ANY_PART(this,"edgeScaleCoords", SoCoordinate3);
crdn->point.setNum(16);
pts = crdn->point.startEditing();
pts[0].setValue( -.1, .9, .002);
pts[1].setValue( .1, .9, .002);
pts[2].setValue( .1, 1, .002);
pts[3].setValue( -.1, 1, .002);
pts[4].setValue( -.1, -1, .002);
pts[5].setValue( .1, -1, .002);
pts[6].setValue( .1, -.9, .002);
pts[7].setValue( -.1, -.9, .002);
pts[8].setValue( .9, -.1, .002);
pts[9].setValue( 1, -.1, .002);
pts[10].setValue( 1, .1, .002);
pts[11].setValue( .9, .1, .002);
pts[12].setValue(-1, -.1, .002);
pts[13].setValue( -.9, -.1, .002);
pts[14].setValue( -.9, .1, .002);
pts[15].setValue(-1, .1, .002);
crdn->point.finishEditing();
crdn = SO_GET_ANY_PART(this,"cornerScaleCoords", SoCoordinate3);
crdn->point.setNum(16);
pts = crdn->point.startEditing();
pts[0].setValue( .9, .9, .002);
pts[1].setValue( 1, .9, .002);
pts[2].setValue( 1, 1, .002);
pts[3].setValue( .9, 1, .002);
pts[4].setValue( .9, -1, .002);
pts[5].setValue( 1, -1, .002);
pts[6].setValue( 1, -.9, .002);
pts[7].setValue( .9, -.9, .002);
pts[8].setValue( -1, -1, .002);
pts[9].setValue( -.9, -1, .002);
pts[10].setValue( -.9, -.9, .002);
pts[11].setValue( -1, -.9, .002);
pts[12].setValue( -1, .9, .002);
pts[13].setValue( -.9, .9, .002);
pts[14].setValue( -.9, 1, .002);
pts[15].setValue( -1, 1, .002);
crdn->point.finishEditing();
// Initialize the indexed face set nodes
int32_t *inds;
SoIndexedFaceSet *fsn;
fsn = new SoIndexedFaceSet;
fsn->coordIndex.setNum(5);
inds = fsn->coordIndex.startEditing();
inds[0] = 0;
inds[1] = 1;
inds[2] = 2;
inds[3] = 3;
inds[4] = -1;
fsn->coordIndex.finishEditing();
setAnyPartAsDefault("edgeScaleTab0", fsn );
setAnyPartAsDefault("cornerScaleTab0", fsn->copy() );
fsn = new SoIndexedFaceSet;
fsn->coordIndex.setNum(5);
inds = fsn->coordIndex.startEditing();
inds[0] = 4;
inds[1] = 5;
inds[2] = 6;
inds[3] = 7;
inds[4] = -1;
fsn->coordIndex.finishEditing();
setAnyPartAsDefault("edgeScaleTab1", fsn );
setAnyPartAsDefault("cornerScaleTab1", fsn->copy() );
fsn = new SoIndexedFaceSet;
fsn->coordIndex.setNum(5);
inds = fsn->coordIndex.startEditing();
inds[0] = 8;
inds[1] = 9;
inds[2] = 10;
inds[3] = 11;
inds[4] = -1;
fsn->coordIndex.finishEditing();
setAnyPartAsDefault("edgeScaleTab2", fsn );
setAnyPartAsDefault("cornerScaleTab2", fsn->copy() );
fsn = new SoIndexedFaceSet;
fsn->coordIndex.setNum(5);
inds = fsn->coordIndex.startEditing();
inds[0] = 12;
inds[1] = 13;
inds[2] = 14;
inds[3] = 15;
inds[4] = -1;
fsn->coordIndex.finishEditing();
setAnyPartAsDefault("edgeScaleTab3", fsn );
setAnyPartAsDefault("cornerScaleTab3", fsn->copy() );
// Set the switch to display everything under it...
SoSwitch *sw = SO_GET_ANY_PART(this,"planeSwitch",SoSwitch);
setSwitchValue( sw, SO_SWITCH_ALL);
// Create the projectors
lineProj = new SbLineProjector();
planeProj = new SbPlaneProjector();
// add the callbacks to perform the dragging
addStartCallback( &SoTabPlaneDragger::startCB );
addMotionCallback( &SoTabPlaneDragger::motionCB );
addFinishCallback( &SoTabPlaneDragger::finishCB );
// add the callback to update things each time a meta key changes.
addOtherEventCallback( &SoTabPlaneDragger::metaKeyChangeCB );
// Updates the translation and scale fields when the motionMatrix is set.
addValueChangedCallback( &SoTabPlaneDragger::valueChangedCB );
// Updates the motionMatrix when the translationFactor field is set.
translFieldSensor
= new SoFieldSensor( &SoTabPlaneDragger::fieldSensorCB, this);
translFieldSensor->setPriority( 0 );
// Updates the motionMatrix when the scaleFactor field is set.
scaleFieldSensor
= new SoFieldSensor( &SoTabPlaneDragger::fieldSensorCB, this);
scaleFieldSensor->setPriority( 0 );
currentState = INACTIVE;
restartState = INACTIVE;
adjustScaleTabSize();
setUpConnections( TRUE, TRUE );
}
////////////////////////////////////////////////////////////////////////
//
// Description:
// Destructor
//
SoTabPlaneDragger::~SoTabPlaneDragger()
//
////////////////////////////////////////////////////////////////////////
{
delete lineProj;
delete planeProj;
if (translFieldSensor)
delete translFieldSensor;
if (scaleFieldSensor)
delete scaleFieldSensor;
}
// detach/attach any sensors, callbacks, and/or field connections.
// Called by: start/end of SoBaseKit::readInstance
// and on new copy by: start/end of SoBaseKit::copy.
// Classes that redefine must call setUpConnections(TRUE,TRUE)
// at end of constructor.
// Returns the state of the node when this was called.
SbBool
SoTabPlaneDragger::setUpConnections( SbBool onOff, SbBool doItAlways )
{
if ( !doItAlways && connectionsSetUp == onOff)
return onOff;
if ( onOff ) {
// We connect AFTER base class.
SoDragger::setUpConnections( onOff, FALSE );
// Call the sensor CBs to make things are up-to-date.
fieldSensorCB( this, NULL );
// Connect the field sensors
if (translFieldSensor->getAttachedField() != &translation)
translFieldSensor->attach( &translation );
if (scaleFieldSensor->getAttachedField() != &scaleFactor)
scaleFieldSensor->attach( &scaleFactor );
}
else {
// We disconnect BEFORE base class.
// Disconnect the field sensors.
if (translFieldSensor->getAttachedField())
translFieldSensor->detach();
if (scaleFieldSensor->getAttachedField())
scaleFieldSensor->detach();
SoDragger::setUpConnections( onOff, FALSE );
}
return !(connectionsSetUp = onOff);
}
////////////////////////////////////////////////////////////////////////
//
// Description:
// Move the tabPlaneDragger based on mouse motion.
//
// Use: private
//
void
SoTabPlaneDragger::dragStart()
//
////////////////////////////////////////////////////////////////////////
{
const SoPath *pickPath = getPickPath();
currentState = INACTIVE;
shftDown = getEvent()->wasShiftDown();
if (restartState != INACTIVE ) {
currentState = restartState;
}
else if (pickPath && pickPath->containsNode(translator.getValue()) ||
getSurrogatePartPickedName() == "translator" ) {
currentState = TRANSLATING;
}
else if ( pickPath && pickPath->containsNode( scaleTabs.getValue() )) {
if (pickPath->containsNode( edgeScaleTab0.getValue()) ) {
currentScalePatch = 0;
currentState = EDGE_SCALING;
}
else if (pickPath->containsNode( edgeScaleTab1.getValue()) ) {
currentScalePatch = 1;
currentState = EDGE_SCALING;
}
else if (pickPath->containsNode( edgeScaleTab2.getValue()) ) {
currentScalePatch = 2;
currentState = EDGE_SCALING;
}
else if (pickPath->containsNode( edgeScaleTab3.getValue()) ) {
currentScalePatch = 3;
currentState = EDGE_SCALING;
}
else if (pickPath->containsNode( cornerScaleTab0.getValue()) ) {
currentScalePatch = 0;
currentState = CORNER_SCALING;
}
else if (pickPath->containsNode( cornerScaleTab1.getValue()) ) {
currentScalePatch = 1;
currentState = CORNER_SCALING;
}
else if (pickPath->containsNode( cornerScaleTab2.getValue()) ) {
currentScalePatch = 2;
currentState = CORNER_SCALING;
}
else if (pickPath->containsNode( cornerScaleTab3.getValue()) ) {
currentScalePatch = 3;
currentState = CORNER_SCALING;
}
if ( currentState == CORNER_SCALING && shftDown )
currentState = UNIFORM_SCALING;
}
if (currentState == TRANSLATING )
translateStart();
else if (currentState == EDGE_SCALING )
edgeScaleStart();
else if (currentState == CORNER_SCALING )
cornerScaleStart();
else if (currentState == UNIFORM_SCALING )
scaleUniformStart();
}
////////////////////////////////////////////////////////////////////////
//
// Description:
//
// Use: private
//
void
SoTabPlaneDragger::drag()
//
////////////////////////////////////////////////////////////////////////
{
if ( currentState == TRANSLATING )
translateDrag();
else if ( currentState == EDGE_SCALING )
edgeScaleDrag();
else if ( currentState == CORNER_SCALING )
cornerScaleDrag();
else if ( currentState == UNIFORM_SCALING )
scaleUniformDrag();
}
////////////////////////////////////////////////////////////////////////
//
// Description:
//
// Use: private
//
void
SoTabPlaneDragger::dragFinish()
//
////////////////////////////////////////////////////////////////////////
{
// turn off highlighting and adjust scale tabs
currentState = INACTIVE;
restartState = INACTIVE;
adjustScaleTabSize();
}
////////////////////////////////////////////////////////////////////////
//
// Description:
// Initializes for motion
//
void
SoTabPlaneDragger::translateStart()
//
////////////////////////////////////////////////////////////////////////
{
// This is the point we'll use if a metaKey callback makes us re-start.
worldRestartPt = getWorldStartingPoint();
// Establish the projector line in local space.
SbVec3f startLocalHitPt = getLocalStartingPoint();
SbVec3f planeNormal(0,0,1);
planeProj->setPlane( SbPlane( planeNormal, startLocalHitPt ) );
// as of yet, translation direction (for 1-D translating) is undefined.
translateDir = -1;
}
////////////////////////////////////////////////////////////////////////
//
void
SoTabPlaneDragger::translateDrag()
//
////////////////////////////////////////////////////////////////////////
{
if (shftDown && ! isAdequateConstraintMotion())
return;
// Get startHitPt in local space.
SbVec3f startHitPt = getLocalStartingPoint();;
// Calculate intersection with plane projector.
// Find mouse hit on plane currently in use...
planeProj->setViewVolume( getViewVolume() );
planeProj->setWorkingSpace( getLocalToWorldMatrix() );
SbVec3f newHitPt
= planeProj->project(getNormalizedLocaterPosition());
// If we need to start a new gesture, we'll carry on from this pt.
getLocalToWorldMatrix().multVecMatrix( newHitPt, worldRestartPt);
// find the difference between current and previous intersections.
SbVec3f localMotion = newHitPt - startHitPt;
if ( !shftDown )
// constrainKey not down. Clear the 1-D translation dir.
translateDir = -1;
else {
// the constrain key is pressed. This means 1-D translation.
if ( translateDir == -1 ) {
// The 1-D direction is not defined. Calculate it
// based on which direction got the maximum locater motion.
if ( _ABS( localMotion[0]) > _ABS( localMotion[1])
&& _ABS( localMotion[0]) > _ABS( localMotion[2]) )
translateDir = 0;
else if ( _ABS( localMotion[1]) > _ABS( localMotion[2]) )
translateDir = 1;
else
translateDir = 2;
}
// get the projection of 'localMotion' onto the preferred axis.
SbVec3f constrainedMotion(0,0,0);
constrainedMotion[translateDir] = localMotion[translateDir];
localMotion = constrainedMotion;
}
// Append this to the startMotionMatrix, which we saved at the beginning
// of the drag, to find the current motion matrix.
setMotionMatrix(appendTranslation(getStartMotionMatrix(),localMotion));
return;
}
////////////////////////////////////////////////////////////////////////
//
void
SoTabPlaneDragger::edgeScaleStart()
//
////////////////////////////////////////////////////////////////////////
{
// This is the point we'll use if a metaKey callback makes us re-start.
worldRestartPt = getWorldStartingPoint();
// Setup scale center and direction for projector line.
SbVec3f lineDir;
switch (currentScalePatch) {
case 0:
scaleCenter.setValue( 0, -1, 0 );
lineDir.setValue( 0, 1, 0);
break;
case 1:
scaleCenter.setValue( 0, 1, 0 );
lineDir.setValue( 0, 1, 0);
break;
case 2:
scaleCenter.setValue( -1, 0, 0 );
lineDir.setValue( 1, 0, 0);
break;
case 3:
scaleCenter.setValue( 1, 0, 0 );
lineDir.setValue( 1, 0, 0);
break;
}
// Establish the projector line
SbVec3f startLocalHitPt = getLocalStartingPoint();
lineProj->setLine( SbLine(startLocalHitPt, startLocalHitPt + lineDir));
}
////////////////////////////////////////////////////////////////////////
void
SoTabPlaneDragger::edgeScaleDrag()
//
////////////////////////////////////////////////////////////////////////
{
lineProj->setViewVolume( getViewVolume() );
lineProj->setWorkingSpace( getLocalToWorldMatrix() );
SbVec3f startHitPt = getLocalStartingPoint();
SbVec3f newHitPt = lineProj->project( getNormalizedLocaterPosition());
// If we need to start a new gesture, we'll carry on from this pt.
getLocalToWorldMatrix().multVecMatrix( newHitPt, worldRestartPt);
// Figure out 'delta', the amount to scale by.
// To do this:
// [1] the line we are really supposed to scale along passes through
// scaleCenter in the direction of our projection line.
// Drop a perpendicular from 'scaleCenter' to our projection line
// to find the origin to use in calculating change of scale.
SbVec3f projectedScaleCenter
= lineProj->getLine().getClosestPoint(scaleCenter);
// [2] Find the distance from the old and new projected points to this
// center.
SbVec3f oldDiff = startHitPt - projectedScaleCenter;
SbVec3f newDiff = newHitPt - projectedScaleCenter;
float oldDist = oldDiff.length();
float newDist = newDiff.length();
if ( oldDiff.dot( newDiff ) < 0.0 )
newDist *= -1.0;
// [3] Change in scale is the ratio of newDist to oldDist
#define TINY 0.0001
float delta = ( fabs(oldDist) < TINY || fabs(newDist) < TINY)
? 1.0 : newDist / oldDist;
#undef TINY
// Constrain the scaling to be greater than getMinScale();
if (delta < getMinScale() )
delta = getMinScale();
// Get the scale we want to apply. It's 'delta' in the direction of our
// projector line and 1 in the other directions
SbVec3f newScaling(1,1,1);
SbVec3f lineDir = lineProj->getLine().getDirection();
for (int i = 0; i < 3; i++ )
if (lineDir[i] == 1.0)
newScaling[i] = delta;
// append this to the startMotionMatrix.
setMotionMatrix(appendScale(getStartMotionMatrix(),newScaling,scaleCenter));
}
////////////////////////////////////////////////////////////////////////
//
void
SoTabPlaneDragger::cornerScaleStart()
//
////////////////////////////////////////////////////////////////////////
{
// This is the point we'll use if a metaKey callback makes us re-start.
worldRestartPt = getWorldStartingPoint();
// Setup scale center
switch (currentScalePatch) {
case 0: scaleCenter.setValue( -1, -1, 0 ); break;
case 1: scaleCenter.setValue( -1, 1, 0 ); break;
case 2: scaleCenter.setValue( 1, 1, 0 ); break;
case 3: scaleCenter.setValue( 1, -1, 0 ); break;
}
SbVec3f startLocalHitPt = getLocalStartingPoint();
// 2-D scaling motion within plane. Establish the projector plane
SbVec3f planeNormal(0,0,1);
planeProj->setPlane( SbPlane( planeNormal, startLocalHitPt ) );
}
////////////////////////////////////////////////////////////////////////
void
SoTabPlaneDragger::cornerScaleDrag()
//
////////////////////////////////////////////////////////////////////////
{
planeProj->setViewVolume( getViewVolume() );
planeProj->setWorkingSpace( getLocalToWorldMatrix() );
SbVec3f startHitPt = getLocalStartingPoint();
SbVec3f newHitPt = planeProj->project( getNormalizedLocaterPosition());
// If we need to start a new gesture, we'll carry on from this pt.
getLocalToWorldMatrix().multVecMatrix( newHitPt, worldRestartPt);
// Figure out 'delta', the amount to scale by.
// To do this:
// [1] the plane we are really supposed to scale in passes through
// scaleCenter with normal of zAxis
// Drop perpendicular from 'scaleCenter' to projection plane
// to find the origin to use in calculating change of scale.
SbVec3f projectedScaleCenter;
SbLine lineThroughCenter( scaleCenter, scaleCenter + SbVec3f(0,0,1) );
planeProj->getPlane().intersect(lineThroughCenter,projectedScaleCenter);
// [2] Now find the scale change in each of the x and y directions.
// Start by projecting each newHitPt's offset onto the two axes.
SbVec3f oldDiff = startHitPt - projectedScaleCenter;
SbVec3f newDiff = newHitPt - projectedScaleCenter;
// [3] Change in scale is the ratio of new to old
#define TINY 0.0001
float xAxisDelta = (_ABS(newDiff[0]) < TINY || _ABS(oldDiff[0])
< TINY) ? 1.0 : newDiff[0] / oldDiff[0];
float yAxisDelta = (_ABS(newDiff[1]) < TINY || _ABS(oldDiff[1])
< TINY) ? 1.0 : newDiff[1] / oldDiff[1];
#undef TINY
// Make sure we didn't fall below minscale
if ( xAxisDelta < getMinScale() )
xAxisDelta = getMinScale();
if ( yAxisDelta < getMinScale() )
yAxisDelta = getMinScale();
SbVec3f scaleDelta( xAxisDelta, yAxisDelta, 1 );
setMotionMatrix( appendScale( getStartMotionMatrix(),
scaleDelta, scaleCenter ) );
}
////////////////////////////////////////////////////////////////////////
//
void
SoTabPlaneDragger::scaleUniformStart()
//
////////////////////////////////////////////////////////////////////////
{
// This is the point we'll use if a metaKey callback makes us re-start.
worldRestartPt = getWorldStartingPoint();
// We wish to scale in 2 dimensions about the corner opposite
// the patch that we have hit.
switch (currentScalePatch) {
case 0:
scaleCenter.setValue( -1, -1, 0);
break;
case 1:
scaleCenter.setValue( -1, 1, 0);
break;
case 2:
scaleCenter.setValue( 1, 1, 0);
break;
case 3:
scaleCenter.setValue( 1, -1, 0);
break;
}
// Find the projection line.
// This line should lie within the same local z-plane
// as the startLocalHitPt.
// It should pass through the startLocalHitPt.
// It should also pass through the point where the scaleCenter
// projects onto the same z-plane as the startLocalHitPt.
SbVec3f startLocalHitPt = getLocalStartingPoint();
SbVec3f zPlaneCenter( scaleCenter[0], scaleCenter[1], startLocalHitPt[2]);
lineProj->setLine( SbLine( startLocalHitPt, zPlaneCenter ) );
}
////////////////////////////////////////////////////////////////////////
void
SoTabPlaneDragger::scaleUniformDrag()
//
////////////////////////////////////////////////////////////////////////
{
lineProj->setViewVolume( getViewVolume() );
lineProj->setWorkingSpace( getLocalToWorldMatrix() );
SbVec3f startHitPt = getLocalStartingPoint();
SbVec3f newHitPt = lineProj->project( getNormalizedLocaterPosition());
// If we need to start a new gesture, we'll carry on from this pt.
getLocalToWorldMatrix().multVecMatrix( newHitPt, worldRestartPt);
// [1] Find distance from old and new projected points to projectedCenter
// projectedCenter is zero-scale point on the lineProj.
SbVec3f projectedCenter = lineProj->getLine().getClosestPoint(scaleCenter);
SbVec3f oldDiff = startHitPt - projectedCenter;
SbVec3f newDiff = newHitPt - projectedCenter;
float oldDist = oldDiff.length();
float newDist = newDiff.length();
// [2] Change in scale is ratio of newDist to oldDist
#define TINY 0.0001
float delta =(oldDist < TINY || newDist < TINY) ? 1.0 : newDist/oldDist;
#undef TINY
// [3] Check if sign of scale changed.
if (oldDiff.dot(newDiff) < 0 )
delta *= -1.0;
if ( delta < getMinScale() )
delta = getMinScale();
SbVec3f scaleDelta( delta, delta, delta );
setMotionMatrix( appendScale( getStartMotionMatrix(),
scaleDelta, scaleCenter ));
}
////////////////////////////////////////////////////////////////////////
//
// Description:
// In addition to usual rendering, this dragger
// turns off the faces of the dragger that face away from the camera.
void
SoTabPlaneDragger::GLRender( SoGLRenderAction *action )
//
////////////////////////////////////////////////////////////////////////
{
if ( needScaleTabAdjustment == TRUE)
reallyAdjustScaleTabSize(action);
SoDragger::GLRender( action );
}
////////////////////////////////////////////////////////////////////////
//
// Description:
// Adjusts the size of the scale tabs to be something reasonable in
// screen space.
//
////////////////////////////////////////////////////////////////////////
#define SCREEN_TAB_SIZE 8
void
SoTabPlaneDragger::adjustScaleTabSize()
{
needScaleTabAdjustment = TRUE;
// This forces a redraw, so any caches containing this will be broken
touch();
}
void
SoTabPlaneDragger::reallyAdjustScaleTabSize(SoGLRenderAction *action)
{
// If the viewport size is still (1,1) or (0,0) then the
// Window we are in has not yet been mapped and realized.
// So we need to just return and wait until next time.
if ( action == NULL )
return;
SoState *state = action->getState();
const SbVec2s &vpSize
= SoViewportRegionElement::get(state).getViewportSizePixels();
if (vpSize[0] < 2 || vpSize[1] < 2)
return;
needScaleTabAdjustment = FALSE;
setCameraInfo( action );
setTempPathToThis( action->getCurPath() );
SbMatrix localToWorld = getLocalToWorldMatrix();
SbMatrix viewMat = SoViewingMatrixElement::get(action->getState());
SbMatrix viewMatInv = viewMat.inverse();
SbMatrix projMat = SoProjectionMatrixElement::get(action->getState());
SbMatrix lclToScr = localToWorld * viewMat * projMat;
// This will give the length of the x and y axes,
// each axis going from -1 to +1.
SbVec2f screenLengths;
getXYScreenLengths(screenLengths,
lclToScr, getViewportRegion().getViewportSizePixels());
//
// Here's how big the tabs will be, in local space.
// The 2.0 is because the box
// is of width 2.
// Each dimension is considered separately, because they will almost
// always be different sizes on screen.
//
SbVec2f localTabSize(2.0 * SCREEN_TAB_SIZE/screenLengths[0],
2.0 * SCREEN_TAB_SIZE/screenLengths[1]);
SbVec2f innerEdgeDist;
innerEdgeDist[0] = 1.0 - localTabSize[0];
innerEdgeDist[1] = 1.0 - localTabSize[1];
SbVec2f outerEdgeDist(1.0, 1.0);
SbVec2f halfTabWidth;
halfTabWidth[0] = (localTabSize[0]/2.0);
halfTabWidth[1] = (localTabSize[1]/2.0);
// Be sure to keep vertices in counter-clockwise order. For each
// group of four, they go in order: 3 2
// when front-facing 0 1
// use a small z value to move points off of cube faces...
const float z = .002;
SoCoordinate3 *esc = (SoCoordinate3 *) edgeScaleCoords.getValue();
if ( esc != NULL ) {
// Make sure there is enough room in the coordinate node.
esc->point.setNum( 16 );
SbVec3f *pts = esc->point.startEditing();
pts[0].setValue( -halfTabWidth[0], innerEdgeDist[1], z);
pts[1].setValue( halfTabWidth[0], innerEdgeDist[1], z);
pts[2].setValue( halfTabWidth[0], outerEdgeDist[1], z);
pts[3].setValue( -halfTabWidth[0], outerEdgeDist[1], z);
pts[4].setValue( -halfTabWidth[0], -outerEdgeDist[1], z);
pts[5].setValue( halfTabWidth[0], -outerEdgeDist[1], z);
pts[6].setValue( halfTabWidth[0], -innerEdgeDist[1], z);
pts[7].setValue( -halfTabWidth[0], -innerEdgeDist[1], z);
pts[8].setValue( innerEdgeDist[0], -halfTabWidth[1], z);
pts[9].setValue( outerEdgeDist[0], -halfTabWidth[1], z);
pts[10].setValue( outerEdgeDist[0], halfTabWidth[1], z);
pts[11].setValue( innerEdgeDist[0], halfTabWidth[1], z);
pts[12].setValue( -outerEdgeDist[0], -halfTabWidth[1], z);
pts[13].setValue( -innerEdgeDist[0], -halfTabWidth[1], z);
pts[14].setValue( -innerEdgeDist[0], halfTabWidth[1], z);
pts[15].setValue( -outerEdgeDist[0], halfTabWidth[1], z);
esc->point.finishEditing();
}
SoCoordinate3 *csc = (SoCoordinate3 *) cornerScaleCoords.getValue();
if ( csc != NULL ) {
// Make sure there is enough room in the coordinate node.
csc->point.setNum( 16 );
SbVec3f *pts = csc->point.startEditing();
pts[0].setValue( innerEdgeDist[0], innerEdgeDist[1], z);
pts[1].setValue( outerEdgeDist[0], innerEdgeDist[1], z);
pts[2].setValue( outerEdgeDist[0], outerEdgeDist[1], z);
pts[3].setValue( innerEdgeDist[0], outerEdgeDist[1], z);
pts[4].setValue( innerEdgeDist[0], -outerEdgeDist[1], z);
pts[5].setValue( outerEdgeDist[0], -outerEdgeDist[1], z);
pts[6].setValue( outerEdgeDist[0], -innerEdgeDist[1], z);
pts[7].setValue( innerEdgeDist[0], -innerEdgeDist[1], z);
pts[8].setValue( -outerEdgeDist[0], -outerEdgeDist[1], z);
pts[9].setValue( -innerEdgeDist[0], -outerEdgeDist[1], z);
pts[10].setValue(-innerEdgeDist[0], -innerEdgeDist[1], z);
pts[11].setValue(-outerEdgeDist[0], -innerEdgeDist[1], z);
pts[12].setValue(-outerEdgeDist[0], innerEdgeDist[1], z);
pts[13].setValue(-innerEdgeDist[0], innerEdgeDist[1], z);
pts[14].setValue(-innerEdgeDist[0], outerEdgeDist[1], z);
pts[15].setValue(-outerEdgeDist[0], outerEdgeDist[1], z);
csc->point.finishEditing();
}
}
////////////////////////////////////////////////////////////////////
// Stubs for callbacks
////////////////////////////////////////////////////////////////////
void
SoTabPlaneDragger::startCB( void *, SoDragger *inDragger )
{
SoTabPlaneDragger *dl = (SoTabPlaneDragger *) inDragger;
dl->dragStart();
}
void
SoTabPlaneDragger::motionCB( void *, SoDragger *inDragger )
{
SoTabPlaneDragger *dl = (SoTabPlaneDragger *) inDragger;
dl->drag();
}
void
SoTabPlaneDragger::finishCB( void *, SoDragger *inDragger )
{
SoTabPlaneDragger *dl = (SoTabPlaneDragger *) inDragger;
dl->dragFinish();
}
//
// For each of the two primary axes, x and y, see how int32_t the segment is
// that goes from -1 to 1.
//
void
SoTabPlaneDragger::getXYScreenLengths(SbVec2f &lengths,
const SbMatrix &localToScreen, const SbVec2s &winSize)
{
// Set the values of the endpoints in local space.
SbVec3f plusX(1,0,0), minusX(-1, 0,0);
SbVec3f plusY(0,1,0), minusY( 0,-1,0);
// Transform them into screen space.
localToScreen.multVecMatrix( plusX, plusX );
localToScreen.multVecMatrix( minusX, minusX );
localToScreen.multVecMatrix( plusY, plusY );
localToScreen.multVecMatrix( minusY, minusY );
// These results are in -1 to 1 space.
// Get them in 0 to 1 space.
plusX[0] = 0.5 * (plusX[0] + 1.0);
plusX[1] = 0.5 * (plusX[1] + 1.0);
minusX[0] = 0.5 * (minusX[0] + 1.0);
minusX[1] = 0.5 * (minusX[1] + 1.0);
plusY[0] = 0.5 * (plusY[0] + 1.0);
plusY[1] = 0.5 * (plusY[1] + 1.0);
minusY[0] = 0.5 * (minusY[0] + 1.0);
minusY[1] = 0.5 * (minusY[1] + 1.0);
// Find square of the length of each transformed segment,
// in pixels.
SbVec2f xAxisPix;
xAxisPix[0] = (plusX[0] - minusX[0]) * winSize[0];
xAxisPix[1] = (plusX[1] - minusX[1]) * winSize[1];
SbVec2f yAxisPix;
yAxisPix[0] = (plusY[0] - minusY[0]) * winSize[0];
yAxisPix[1] = (plusY[1] - minusY[1]) * winSize[1];
lengths[0] = xAxisPix.length();
lengths[1] = yAxisPix.length();
}
//
////////////////////////////////////////////////////////////////////////
// keypress/release callback functions
//
// These assure that the proper changes to the highlights,
// currentState, and projectors are made
//
////////////////////////////////////////////////////////////////////////
//
void
SoTabPlaneDragger::metaKeyChangeCB( void *, SoDragger *inDragger)
{
SoTabPlaneDragger *tpd = (SoTabPlaneDragger *) inDragger;
SoHandleEventAction *ha = tpd->getHandleEventAction();
//[1] Only do this if we are grabbing events
if ( ha->getGrabber() != tpd )
return;
//[2] We only want key press or release events.
const SoEvent *event = tpd->getEvent();
if ( !SO_KEY_PRESS_EVENT(event, ANY) && !SO_KEY_RELEASE_EVENT(event, ANY))
return;
//[3] Is the key 'shift'
const SoKeyboardEvent *ke = (const SoKeyboardEvent *) event;
SoKeyboardEvent::Key key = ke->getKey();
if ( ( key == SoKeyboardEvent::LEFT_SHIFT ||
key == SoKeyboardEvent::RIGHT_SHIFT ) &&
( tpd->currentState == TRANSLATING ||
tpd->currentState == UNIFORM_SCALING ||
tpd->currentState == CORNER_SCALING )) {
// We want to end the old gesture and start a new one.
// [A] Release the grabber. This ends the gesture and calls all
// finishCallbacks (on parent dragger, too, if we're registered)
State savedState = tpd->currentState;
ha->releaseGrabber();
// [B] Set the starting point to be our saved worldRestartPoint
tpd->setStartingPoint( tpd->worldRestartPt );
tpd->restartState = savedState;
// [C] Become the grabber again. This begins a new gesture and calls all
// startCallbacks (parent dragger, too). Info like viewVolume,
// viewportRegion, handleEventAction, and tempPathToThis
// is still valid.
ha->setGrabber(tpd);
// [D] set handled
ha->setHandled();
}
}
void
SoTabPlaneDragger::valueChangedCB( void *, SoDragger *inDragger )
{
SoTabPlaneDragger *tpd = (SoTabPlaneDragger *) inDragger;
SbMatrix motMat = tpd->getMotionMatrix();
SbVec3f trans, scale;
SbRotation rot, scaleOrient;
getTransformFast( motMat, trans, rot, scale, scaleOrient);
// Disconnect the field sensors
tpd->translFieldSensor->detach();
tpd->scaleFieldSensor->detach();
if ( tpd->translation.getValue() != trans )
tpd->translation = trans;
if ( tpd->scaleFactor.getValue() != scale )
tpd->scaleFactor = scale;
// Reconnect the field sensors
tpd->translFieldSensor->attach( &(tpd->translation) );
tpd->scaleFieldSensor->attach( &(tpd->scaleFactor) );
}
void
SoTabPlaneDragger::fieldSensorCB( void *inDragger, SoSensor * )
{
SoTabPlaneDragger *tpd = (SoTabPlaneDragger *) inDragger;
// Incorporate the new field values into the matrix
SbMatrix motMat = tpd->getMotionMatrix();
tpd->workFieldsIntoTransform(motMat);
tpd->setMotionMatrix( motMat );
}
void
SoTabPlaneDragger::setDefaultOnNonWritingFields()
{
// This node may change after construction, but we still
// don't want to write it out.
edgeScaleCoords.setDefault(TRUE);
cornerScaleCoords.setDefault(TRUE);
// Call the base class...
SoDragger::setDefaultOnNonWritingFields();
}
|