transform_generics.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.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

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

#include "MEM_guardedalloc.h"

#include "BLO_sys_types.h" // for intptr_t support

#include "DNA_anim_types.h"
#include "DNA_armature_types.h"
#include "DNA_lattice_types.h"
#include "DNA_screen_types.h"
#include "DNA_space_types.h"
#include "DNA_scene_types.h"
#include "DNA_object_types.h"
#include "DNA_meshdata_types.h"
#include "DNA_view3d_types.h"
#include "DNA_modifier_types.h"
#include "DNA_movieclip_types.h"

#include "RNA_access.h"

//#include "BIF_screen.h"
//#include "BIF_mywindow.h"
#include "BIF_gl.h"
#include "BIF_glutil.h"
//#include "BIF_editmesh.h"
//#include "BIF_editsima.h"
//#include "BIF_editparticle.h"
//#include "BIF_meshtools.h"

#include "BKE_animsys.h"
#include "BKE_action.h"
#include "BKE_armature.h"
#include "BKE_curve.h"
#include "BKE_depsgraph.h"
#include "BKE_displist.h"
#include "BKE_fcurve.h"
#include "BKE_lattice.h"
#include "BKE_mesh.h"
#include "BKE_nla.h"
#include "BKE_context.h"
#include "BKE_tracking.h"

#include "ED_anim_api.h"
#include "ED_armature.h"
#include "ED_image.h"
#include "ED_keyframing.h"
#include "ED_markers.h"
#include "ED_mesh.h"
#include "ED_particle.h"
#include "ED_screen_types.h"
#include "ED_space_api.h"
#include "ED_uvedit.h"
#include "ED_view3d.h"
#include "ED_curve.h" /* for curve_editnurbs */
#include "ED_clip.h"

//#include "BDR_unwrapper.h"

#include "BLI_math.h"
#include "BLI_blenlib.h"
#include "BLI_editVert.h"
#include "BLI_rand.h"
#include "BLI_utildefines.h"

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

#include "UI_resources.h"

//#include "blendef.h"
//
//#include "mydevice.h"

#include "transform.h"

extern ListBase editelems;

/* ************************** Functions *************************** */

void getViewVector(TransInfo *t, float coord[3], float vec[3])
{
    if (t->persp != RV3D_ORTHO)
    {
        float p1[4], p2[4];
        
        copy_v3_v3(p1, coord);
        p1[3] = 1.0f;
        copy_v3_v3(p2, p1);
        p2[3] = 1.0f;
        mul_m4_v4(t->viewmat, p2);
        
        p2[0] = 2.0f * p2[0];
        p2[1] = 2.0f * p2[1];
        p2[2] = 2.0f * p2[2];
        
        mul_m4_v4(t->viewinv, p2);
        
        sub_v3_v3v3(vec, p1, p2);
    }
    else {
        copy_v3_v3(vec, t->viewinv[2]);
    }
    normalize_v3(vec);
}

/* ************************** GENERICS **************************** */

static void clipMirrorModifier(TransInfo *t, Object *ob)
{
    ModifierData *md= ob->modifiers.first;
    float tolerance[3] = {0.0f, 0.0f, 0.0f};
    int axis = 0;
    
    for (; md; md=md->next) {
        if ((md->type==eModifierType_Mirror) && (md->mode & eModifierMode_Realtime)) {
            MirrorModifierData *mmd = (MirrorModifierData*) md;
            
            if(mmd->flag & MOD_MIR_CLIPPING) {
                axis = 0;
                if(mmd->flag & MOD_MIR_AXIS_X) {
                    axis |= 1;
                    tolerance[0] = mmd->tolerance;
                }
                if(mmd->flag & MOD_MIR_AXIS_Y) {
                    axis |= 2;
                    tolerance[1] = mmd->tolerance;
                }
                if(mmd->flag & MOD_MIR_AXIS_Z) {
                    axis |= 4;
                    tolerance[2] = mmd->tolerance;
                }
                if (axis) {
                    float mtx[4][4], imtx[4][4];
                    int i;
                    TransData *td = t->data;
                    
                    if (mmd->mirror_ob) {
                        float obinv[4][4];
                        
                        invert_m4_m4(obinv, mmd->mirror_ob->obmat);
                        mult_m4_m4m4(mtx, obinv, ob->obmat);
                        invert_m4_m4(imtx, mtx);
                    }
                    
                    for(i = 0 ; i < t->total; i++, td++) {
                        int clip;
                        float loc[3], iloc[3];
                        
                        if (td->flag & TD_NOACTION)
                            break;
                        if (td->loc==NULL)
                            break;
                        
                        if (td->flag & TD_SKIP)
                            continue;
                        
                        copy_v3_v3(loc,  td->loc);
                        copy_v3_v3(iloc, td->iloc);
                        
                        if (mmd->mirror_ob) {
                            mul_m4_v3(mtx, loc);
                            mul_m4_v3(mtx, iloc);
                        }
                        
                        clip = 0;
                        if(axis & 1) {
                            if(fabsf(iloc[0])<=tolerance[0] ||
                               loc[0]*iloc[0]<0.0f)
                            {
                                loc[0]= 0.0f;
                                clip = 1;
                            }
                        }
                        
                        if(axis & 2) {
                            if(fabs(iloc[1])<=tolerance[1] ||
                               loc[1]*iloc[1]<0.0f)
                            {
                                loc[1]= 0.0f;
                                clip = 1;
                            }
                        }
                        if(axis & 4) {
                            if(fabs(iloc[2])<=tolerance[2] ||
                               loc[2]*iloc[2]<0.0f)
                            {
                                loc[2]= 0.0f;
                                clip = 1;
                            }
                        }
                        if (clip) {
                            if (mmd->mirror_ob) {
                                mul_m4_v3(imtx, loc);
                            }
                            copy_v3_v3(td->loc, loc);
                        }
                    }
                }
                
            }
        }
    }
}

/* assumes obedit set to mesh object */
static void editmesh_apply_to_mirror(TransInfo *t)
{
    TransData *td = t->data;
    EditVert *eve;
    int i;
    
    for(i = 0 ; i < t->total; i++, td++) {
        if (td->flag & TD_NOACTION)
            break;
        if (td->loc==NULL)
            break;
        if (td->flag & TD_SKIP)
            continue;
        
        eve = td->extra;
        if (eve) {
            eve->co[0]= -td->loc[0];
            eve->co[1]= td->loc[1];
            eve->co[2]= td->loc[2];
        }
        
        if (td->flag & TD_MIRROR_EDGE)
        {
            td->loc[0] = 0;
        }
    }
}

/* for the realtime animation recording feature, handle overlapping data */
static void animrecord_check_state (Scene *scene, ID *id, wmTimer *animtimer)
{
    ScreenAnimData *sad= (animtimer) ? animtimer->customdata : NULL;
    
    /* sanity checks */
    if ELEM3(NULL, scene, id, sad)
        return;
    
    /* check if we need a new strip if:
     *  - if animtimer is running 
     *  - we're not only keying for available channels
     *  - the option to add new actions for each round is not enabled
     */
    if (IS_AUTOKEY_FLAG(scene, INSERTAVAIL)==0 && (scene->toolsettings->autokey_flag & ANIMRECORD_FLAG_WITHNLA)) {
        /* if playback has just looped around, we need to add a new NLA track+strip to allow a clean pass to occur */
        if ((sad) && (sad->flag & ANIMPLAY_FLAG_JUMPED)) {
            AnimData *adt= BKE_animdata_from_id(id);
            
            /* perform push-down manually with some differences 
             * NOTE: BKE_nla_action_pushdown() sync warning...
             */
            if ((adt->action) && !(adt->flag & ADT_NLA_EDIT_ON)) {
                float astart, aend;
                
                /* only push down if action is more than 1-2 frames long */
                calc_action_range(adt->action, &astart, &aend, 1);
                if (aend > astart+2.0f) {
                    NlaStrip *strip= add_nlastrip_to_stack(adt, adt->action);
                    
                    /* clear reference to action now that we've pushed it onto the stack */
                    adt->action->id.us--;
                    adt->action= NULL;
                    
                    /* adjust blending + extend so that they will behave correctly */
                    strip->extendmode= NLASTRIP_EXTEND_NOTHING;
                    strip->flag &= ~(NLASTRIP_FLAG_AUTO_BLENDS|NLASTRIP_FLAG_SELECT|NLASTRIP_FLAG_ACTIVE);
                    
                    /* also, adjust the AnimData's action extend mode to be on 
                     * 'nothing' so that previous result still play 
                     */
                    adt->act_extendmode= NLASTRIP_EXTEND_NOTHING;
                }
            }
        }
    }
}

static int fcu_test_selected(FCurve *fcu)
{
    BezTriple *bezt= fcu->bezt;
    unsigned int i;

    if (bezt==NULL) /* ignore baked */
        return 0;

    for (i=0; i < fcu->totvert; i++, bezt++) {
        if (BEZSELECTED(bezt)) return 1;
    }

    return 0;
}

/* helper for recalcData() - for Action Editor transforms */
static void recalcData_actedit(TransInfo *t)
{
    Scene *scene= t->scene;
    SpaceAction *saction= (SpaceAction *)t->sa->spacedata.first;
    
    bAnimContext ac= {NULL};
    ListBase anim_data = {NULL, NULL};
    bAnimListElem *ale;
    int filter;
    
    /* initialise relevant anim-context 'context' data from TransInfo data */
        /* NOTE: sync this with the code in ANIM_animdata_get_context() */
    ac.scene= t->scene;
    ac.obact= OBACT;
    ac.sa= t->sa;
    ac.ar= t->ar;
    ac.sl= (t->sa)? t->sa->spacedata.first : NULL;
    ac.spacetype= (t->sa)? t->sa->spacetype : 0;
    ac.regiontype= (t->ar)? t->ar->regiontype : 0;
    
    ANIM_animdata_context_getdata(&ac);
    
    /* perform flush */
    if (ac.datatype == ANIMCONT_GPENCIL) {
        /* flush transform values back to actual coordinates */
        flushTransGPactionData(t);
    }
    else {
        /* get animdata blocks visible in editor, assuming that these will be the ones where things changed */
        filter= (ANIMFILTER_DATA_VISIBLE | ANIMFILTER_ANIMDATA);
        ANIM_animdata_filter(&ac, &anim_data, filter, ac.data, ac.datatype);
        
        /* just tag these animdata-blocks to recalc, assuming that some data there changed 
         * BUT only do this if realtime updates are enabled
         */
        if ((saction->flag & SACTION_NOREALTIMEUPDATES) == 0) {
            for (ale= anim_data.first; ale; ale= ale->next) {
                /* set refresh tags for objects using this animation */
                ANIM_list_elem_update(t->scene, ale);
            }
        }
        
        /* now free temp channels */
        BLI_freelistN(&anim_data);
    }
}

/* helper for recalcData() - for Graph Editor transforms */
static void recalcData_graphedit(TransInfo *t)
{
    SpaceIpo *sipo= (SpaceIpo *)t->sa->spacedata.first;
    Scene *scene;
    
    ListBase anim_data = {NULL, NULL};
    bAnimContext ac= {NULL};
    int filter;
    
    bAnimListElem *ale;
    int dosort = 0;
    
    
    /* initialise relevant anim-context 'context' data from TransInfo data */
        /* NOTE: sync this with the code in ANIM_animdata_get_context() */
    scene= ac.scene= t->scene;
    ac.obact= OBACT;
    ac.sa= t->sa;
    ac.ar= t->ar;
    ac.sl= (t->sa)? t->sa->spacedata.first : NULL;
    ac.spacetype= (t->sa)? t->sa->spacetype : 0;
    ac.regiontype= (t->ar)? t->ar->regiontype : 0;
    
    ANIM_animdata_context_getdata(&ac);
    
    /* do the flush first */
    flushTransGraphData(t);
    
    /* get curves to check if a re-sort is needed */
    filter= (ANIMFILTER_DATA_VISIBLE | ANIMFILTER_FOREDIT | ANIMFILTER_CURVE_VISIBLE);
    ANIM_animdata_filter(&ac, &anim_data, filter, ac.data, ac.datatype);
    
    /* now test if there is a need to re-sort */
    for (ale= anim_data.first; ale; ale= ale->next) {
        FCurve *fcu= (FCurve *)ale->key_data;
        
        /* ignore unselected fcurves */
        if (!fcu_test_selected(fcu))
            continue;
        
        // fixme: only do this for selected verts...
        ANIM_unit_mapping_apply_fcurve(ac.scene, ale->id, ale->key_data, ANIM_UNITCONV_ONLYSEL|ANIM_UNITCONV_SELVERTS|ANIM_UNITCONV_RESTORE);
        
        
        /* watch it: if the time is wrong: do not correct handles yet */
        if (test_time_fcurve(fcu))
            dosort++;
        else
            calchandles_fcurve(fcu);
        
        /* set refresh tags for objects using this animation,
         * BUT only if realtime updates are enabled  
         */
        if ((sipo->flag & SIPO_NOREALTIMEUPDATES) == 0)
            ANIM_list_elem_update(t->scene, ale);
    }
    
    /* do resort and other updates? */
    if (dosort) remake_graph_transdata(t, &anim_data);
    
    /* now free temp channels */
    BLI_freelistN(&anim_data);
}

/* helper for recalcData() - for NLA Editor transforms */
static void recalcData_nla(TransInfo *t)
{
    TransDataNla *tdn= (TransDataNla *)t->customData;
    SpaceNla *snla= (SpaceNla *)t->sa->spacedata.first;
    Scene *scene= t->scene;
    double secf= FPS;
    int i;
    
    /* for each strip we've got, perform some additional validation of the values that got set before
     * using RNA to set the value (which does some special operations when setting these values to make
     * sure that everything works ok)
     */
    for (i = 0; i < t->total; i++, tdn++) {
        NlaStrip *strip= tdn->strip;
        PointerRNA strip_ptr;
        short pExceeded, nExceeded, iter;
        int delta_y1, delta_y2;
        
        /* if this tdn has no handles, that means it is just a dummy that should be skipped */
        if (tdn->handle == 0)
            continue;
        
        /* set refresh tags for objects using this animation,
         * BUT only if realtime updates are enabled  
         */
        if ((snla->flag & SNLA_NOREALTIMEUPDATES) == 0)
            ANIM_id_update(t->scene, tdn->id);
        
        /* if cancelling transform, just write the values without validating, then move on */
        if (t->state == TRANS_CANCEL) {
            /* clear the values by directly overwriting the originals, but also need to restore
             * endpoints of neighboring transition-strips
             */
            
            /* start */
            strip->start= tdn->h1[0];
            
            if ((strip->prev) && (strip->prev->type == NLASTRIP_TYPE_TRANSITION))
                strip->prev->end= tdn->h1[0];
            
            /* end */
            strip->end= tdn->h2[0];
            
            if ((strip->next) && (strip->next->type == NLASTRIP_TYPE_TRANSITION))
                strip->next->start= tdn->h2[0];
            
            /* flush transforms to child strips (since this should be a meta) */
            BKE_nlameta_flush_transforms(strip);
            
            /* restore to original track (if needed) */
            if (tdn->oldTrack != tdn->nlt) {
                /* just append to end of list for now, since strips get sorted in special_aftertrans_update() */
                BLI_remlink(&tdn->nlt->strips, strip);
                BLI_addtail(&tdn->oldTrack->strips, strip);
            }
            
            continue;
        }
        
        /* firstly, check if the proposed transform locations would overlap with any neighbouring strips
         * (barring transitions) which are absolute barriers since they are not being moved
         *
         * this is done as a iterative procedure (done 5 times max for now)
         */
        for (iter=0; iter < 5; iter++) {
            pExceeded= ((strip->prev) && (strip->prev->type != NLASTRIP_TYPE_TRANSITION) && (tdn->h1[0] < strip->prev->end));
            nExceeded= ((strip->next) && (strip->next->type != NLASTRIP_TYPE_TRANSITION) && (tdn->h2[0] > strip->next->start));
            
            if ((pExceeded && nExceeded) || (iter == 4) ) {
                /* both endpoints exceeded (or iteration ping-pong'd meaning that we need a compromise)
                 *  - simply crop strip to fit within the bounds of the strips bounding it
                 *  - if there were no neighbours, clear the transforms (make it default to the strip's current values)
                 */
                if (strip->prev && strip->next) {
                    tdn->h1[0]= strip->prev->end;
                    tdn->h2[0]= strip->next->start;
                }
                else {
                    tdn->h1[0]= strip->start;
                    tdn->h2[0]= strip->end;
                }
            }
            else if (nExceeded) {
                /* move backwards */
                float offset= tdn->h2[0] - strip->next->start;
                
                tdn->h1[0] -= offset;
                tdn->h2[0] -= offset;
            }
            else if (pExceeded) {
                /* more forwards */
                float offset= strip->prev->end - tdn->h1[0];
                
                tdn->h1[0] += offset;
                tdn->h2[0] += offset;
            }
            else /* all is fine and well */
                break;
        }
        
        /* handle auto-snapping */
        switch (snla->autosnap) {
            case SACTSNAP_FRAME: /* snap to nearest frame/time  */
                if (snla->flag & SNLA_DRAWTIME) {
                    tdn->h1[0]= (float)( floor((tdn->h1[0]/secf) + 0.5f) * secf );
                    tdn->h2[0]= (float)( floor((tdn->h2[0]/secf) + 0.5f) * secf );
                }
                else {
                    tdn->h1[0]= (float)( floor(tdn->h1[0]+0.5f) );
                    tdn->h2[0]= (float)( floor(tdn->h2[0]+0.5f) );
                }
                break;
            
            case SACTSNAP_MARKER: /* snap to nearest marker */
                tdn->h1[0]= (float)ED_markers_find_nearest_marker_time(&t->scene->markers, tdn->h1[0]);
                tdn->h2[0]= (float)ED_markers_find_nearest_marker_time(&t->scene->markers, tdn->h2[0]);
                break;
        }
        
        /* use RNA to write the values... */
        // TODO: do we need to write in 2 passes to make sure that no truncation goes on?
        RNA_pointer_create(NULL, &RNA_NlaStrip, strip, &strip_ptr);
        
        RNA_float_set(&strip_ptr, "frame_start", tdn->h1[0]);
        RNA_float_set(&strip_ptr, "frame_end", tdn->h2[0]);
        
        /* flush transforms to child strips (since this should be a meta) */
        BKE_nlameta_flush_transforms(strip);
        
        
        /* now, check if we need to try and move track
         *  - we need to calculate both, as only one may have been altered by transform if only 1 handle moved
         */
        delta_y1= ((int)tdn->h1[1] / NLACHANNEL_STEP(snla) - tdn->trackIndex);
        delta_y2= ((int)tdn->h2[1] / NLACHANNEL_STEP(snla) - tdn->trackIndex);
        
        if (delta_y1 || delta_y2) {
            NlaTrack *track;
            int delta = (delta_y2) ? delta_y2 : delta_y1;
            int n;
            
            /* move in the requested direction, checking at each layer if there's space for strip to pass through,
             * stopping on the last track available or that we're able to fit in
             */
            if (delta > 0) {
                for (track=tdn->nlt->next, n=0; (track) && (n < delta); track=track->next, n++) {
                    /* check if space in this track for the strip */
                    if (BKE_nlatrack_has_space(track, strip->start, strip->end)) {
                        /* move strip to this track */
                        BLI_remlink(&tdn->nlt->strips, strip);
                        BKE_nlatrack_add_strip(track, strip);
                        
                        tdn->nlt= track;
                        tdn->trackIndex++;
                    }
                    else /* can't move any further */
                        break;
                }
            }
            else {
                /* make delta 'positive' before using it, since we now know to go backwards */
                delta= -delta;
                
                for (track=tdn->nlt->prev, n=0; (track) && (n < delta); track=track->prev, n++) {
                    /* check if space in this track for the strip */
                    if (BKE_nlatrack_has_space(track, strip->start, strip->end)) {
                        /* move strip to this track */
                        BLI_remlink(&tdn->nlt->strips, strip);
                        BKE_nlatrack_add_strip(track, strip);
                        
                        tdn->nlt= track;
                        tdn->trackIndex--;
                    }
                    else /* can't move any further */
                        break;
                }
            }
        }
    }
}

/* helper for recalcData() - for Image Editor transforms */
static void recalcData_image(TransInfo *t)
{
    if (t->obedit && t->obedit->type == OB_MESH) {
        SpaceImage *sima= t->sa->spacedata.first;
        
        flushTransUVs(t);
        if(sima->flag & SI_LIVE_UNWRAP)
            ED_uvedit_live_unwrap_re_solve();
        
        DAG_id_tag_update(t->obedit->data, 0);
    }
}

/* helper for recalcData() - for Movie Clip transforms */
static void recalcData_clip(TransInfo *t)
{
    SpaceClip *sc= t->sa->spacedata.first;
    MovieClip *clip= ED_space_clip(sc);
    ListBase *tracksbase= BKE_tracking_get_tracks(&clip->tracking);
    MovieTrackingTrack *track;
    
    if(t->state == TRANS_CANCEL) {
        track= tracksbase->first;
        while(track) {
            if(TRACK_VIEW_SELECTED(sc, track)) {
                MovieTrackingMarker *marker= BKE_tracking_ensure_marker(track, sc->user.framenr);
                
                marker->flag= track->transflag;
            }
            
            track= track->next;
        }
    }
    
    flushTransTracking(t);
    
    track= tracksbase->first;
    while(track) {
        if(TRACK_VIEW_SELECTED(sc, track)) {
            if (t->mode == TFM_TRANSLATION) {
                if(TRACK_AREA_SELECTED(track, TRACK_AREA_PAT))
                    BKE_tracking_clamp_track(track, CLAMP_PAT_POS);
                if(TRACK_AREA_SELECTED(track, TRACK_AREA_SEARCH))
                    BKE_tracking_clamp_track(track, CLAMP_SEARCH_POS);
            }
            else if (t->mode == TFM_RESIZE) {
                if(TRACK_AREA_SELECTED(track, TRACK_AREA_PAT))
                    BKE_tracking_clamp_track(track, CLAMP_PAT_DIM);
                if(TRACK_AREA_SELECTED(track, TRACK_AREA_SEARCH))
                    BKE_tracking_clamp_track(track, CLAMP_SEARCH_DIM);
            }
        }
        
        track= track->next;
    }
    
    DAG_id_tag_update(&clip->id, 0);
}

/* helper for recalcData() - for 3d-view transforms */
static void recalcData_view3d(TransInfo *t)
{
    Base *base = t->scene->basact;
    
    if (t->obedit) {
        if ELEM(t->obedit->type, OB_CURVE, OB_SURF) {
            Curve *cu= t->obedit->data;
            ListBase *nurbs= curve_editnurbs(cu);
            Nurb *nu= nurbs->first;
            
            if(t->state != TRANS_CANCEL) {
                clipMirrorModifier(t, t->obedit);
                applyProject(t);
            }
            
            DAG_id_tag_update(t->obedit->data, 0);  /* sets recalc flags */
                
            if (t->state == TRANS_CANCEL) {
                while(nu) {
                    calchandlesNurb(nu); /* Cant do testhandlesNurb here, it messes up the h1 and h2 flags */
                    nu= nu->next;
                }
            } 
            else {
                /* Normal updating */
                while(nu) {
                    test2DNurb(nu);
                    calchandlesNurb(nu);
                    nu= nu->next;
                }
            }
        }
        else if(t->obedit->type==OB_LATTICE) {
            Lattice *la= t->obedit->data;
            
            if(t->state != TRANS_CANCEL) {
                applyProject(t);
            }
            
            DAG_id_tag_update(t->obedit->data, 0);  /* sets recalc flags */
            
            if(la->editlatt->latt->flag & LT_OUTSIDE) outside_lattice(la->editlatt->latt);
        }
        else if (t->obedit->type == OB_MESH) {
            EditMesh *em = ((Mesh*)t->obedit->data)->edit_mesh;
            /* mirror modifier clipping? */
            if(t->state != TRANS_CANCEL) {
                /* apply clipping after so we never project past the clip plane [#25423] */
                applyProject(t);
                clipMirrorModifier(t, t->obedit);
            }
            if((t->options & CTX_NO_MIRROR) == 0 && (t->flag & T_MIRROR))
                editmesh_apply_to_mirror(t);
                
            DAG_id_tag_update(t->obedit->data, 0);  /* sets recalc flags */
            
            recalc_editnormals(em);
        }
        else if(t->obedit->type==OB_ARMATURE) { /* no recalc flag, does pose */
            bArmature *arm= t->obedit->data;
            ListBase *edbo = arm->edbo;
            EditBone *ebo;
            TransData *td = t->data;
            int i;
            
            if(t->state != TRANS_CANCEL) {
                applyProject(t);
            }
            
            /* Ensure all bones are correctly adjusted */
            for (ebo = edbo->first; ebo; ebo = ebo->next){
                
                if ((ebo->flag & BONE_CONNECTED) && ebo->parent){
                    /* If this bone has a parent tip that has been moved */
                    if (ebo->parent->flag & BONE_TIPSEL){
                        copy_v3_v3 (ebo->head, ebo->parent->tail);
                        if(t->mode==TFM_BONE_ENVELOPE) ebo->rad_head= ebo->parent->rad_tail;
                    }
                    /* If this bone has a parent tip that has NOT been moved */
                    else{
                        copy_v3_v3 (ebo->parent->tail, ebo->head);
                        if(t->mode==TFM_BONE_ENVELOPE) ebo->parent->rad_tail= ebo->rad_head;
                    }
                }
                
                /* on extrude bones, oldlength==0.0f, so we scale radius of points */
                ebo->length= len_v3v3(ebo->head, ebo->tail);
                if(ebo->oldlength==0.0f) {
                    ebo->rad_head= 0.25f*ebo->length;
                    ebo->rad_tail= 0.10f*ebo->length;
                    ebo->dist= 0.25f*ebo->length;
                    if(ebo->parent) {
                        if(ebo->rad_head > ebo->parent->rad_tail)
                            ebo->rad_head= ebo->parent->rad_tail;
                    }
                }
                else if(t->mode!=TFM_BONE_ENVELOPE) {
                    /* if bones change length, lets do that for the deform distance as well */
                    ebo->dist*= ebo->length/ebo->oldlength;
                    ebo->rad_head*= ebo->length/ebo->oldlength;
                    ebo->rad_tail*= ebo->length/ebo->oldlength;
                    ebo->oldlength= ebo->length;
                }
            }
            
            
            if (t->mode != TFM_BONE_ROLL)
            {
                /* fix roll */
                for(i = 0; i < t->total; i++, td++)
                {
                    if (td->extra)
                    {
                        float vec[3], up_axis[3];
                        float qrot[4];
                        
                        ebo = td->extra;
                        copy_v3_v3(up_axis, td->axismtx[2]);
                        
                        if (t->mode != TFM_ROTATION)
                        {
                            sub_v3_v3v3(vec, ebo->tail, ebo->head);
                            normalize_v3(vec);
                            rotation_between_vecs_to_quat(qrot, td->axismtx[1], vec);
                            mul_qt_v3(qrot, up_axis);
                        }
                        else
                        {
                            mul_m3_v3(t->mat, up_axis);
                        }
                        
                        ebo->roll = ED_rollBoneToVector(ebo, up_axis, FALSE);
                    }
                }
            }
            
            if(arm->flag & ARM_MIRROR_EDIT)
                transform_armature_mirror_update(t->obedit);
            
        }
        else
        {
            if(t->state != TRANS_CANCEL) {
                applyProject(t);
            }
            DAG_id_tag_update(t->obedit->data, 0);  /* sets recalc flags */
        }
    }
    else if( (t->flag & T_POSE) && t->poseobj) {
        Object *ob= t->poseobj;
        bArmature *arm= ob->data;
        
        /* if animtimer is running, and the object already has animation data,
         * check if the auto-record feature means that we should record 'samples'
         * (i.e. uneditable animation values)
         *
         * context is needed for keying set poll() functions.
         */
        // TODO: autokeyframe calls need some setting to specify to add samples (FPoints) instead of keyframes?
        if ((t->animtimer) && (t->context) && IS_AUTOKEY_ON(t->scene)) {
            int targetless_ik= (t->flag & T_AUTOIK); // XXX this currently doesn't work, since flags aren't set yet!
            
            animrecord_check_state(t->scene, &ob->id, t->animtimer);
            autokeyframe_pose_cb_func(t->context, t->scene, (View3D *)t->view, ob, t->mode, targetless_ik);
        }
        
        /* old optimize trick... this enforces to bypass the depgraph */
        if (!(arm->flag & ARM_DELAYDEFORM)) {
            DAG_id_tag_update(&ob->id, OB_RECALC_DATA);  /* sets recalc flags */
        }
        else
            where_is_pose(t->scene, ob);
    }
    else if(base && (base->object->mode & OB_MODE_PARTICLE_EDIT) && PE_get_current(t->scene, base->object)) {
        if(t->state != TRANS_CANCEL) {
            applyProject(t);
        }
        flushTransParticles(t);
    }
    else {
        int i;
        
        if(t->state != TRANS_CANCEL) {
            applyProject(t);
        }
        
        for (i = 0; i < t->total; i++) {
            TransData *td = t->data + i;
            Object *ob = td->ob;
            
            if (td->flag & TD_NOACTION)
                break;
            
            if (td->flag & TD_SKIP)
                continue;
            
            /* if animtimer is running, and the object already has animation data,
             * check if the auto-record feature means that we should record 'samples'
             * (i.e. uneditable animation values)
             */
            // TODO: autokeyframe calls need some setting to specify to add samples (FPoints) instead of keyframes?
            if ((t->animtimer) && IS_AUTOKEY_ON(t->scene)) {
                animrecord_check_state(t->scene, &ob->id, t->animtimer);
                autokeyframe_ob_cb_func(t->context, t->scene, (View3D *)t->view, ob, t->mode);
            }
            
            /* sets recalc flags fully, instead of flushing existing ones 
             * otherwise proxies don't function correctly
             */
            DAG_id_tag_update(&ob->id, OB_RECALC_OB);
        }
    }
}

/* called for updating while transform acts, once per redraw */
void recalcData(TransInfo *t)
{
    if (t->spacetype==SPACE_NODE) {
        flushTransNodes(t);
    }
    else if (t->spacetype==SPACE_SEQ) {
        flushTransSeq(t);
    }
    else if (t->spacetype == SPACE_ACTION) {
        recalcData_actedit(t);
    }
    else if (t->spacetype == SPACE_IPO) {
        recalcData_graphedit(t);
    }
    else if (t->spacetype == SPACE_NLA) {
        recalcData_nla(t);
    }
    else if (t->spacetype == SPACE_IMAGE) {
        recalcData_image(t);
    }
    else if (t->spacetype == SPACE_VIEW3D) {
        recalcData_view3d(t);
    }
    else if (t->spacetype == SPACE_CLIP) {
        recalcData_clip(t);
    }
}

void drawLine(TransInfo *t, float *center, float *dir, char axis, short options)
{
    float v1[3], v2[3], v3[3];
    unsigned char col[3], col2[3];

    if (t->spacetype == SPACE_VIEW3D)
    {
        View3D *v3d = t->view;
        
        glPushMatrix();
        
        //if(t->obedit) glLoadMatrixf(t->obedit->obmat);    // sets opengl viewing
        
        
        copy_v3_v3(v3, dir);
        mul_v3_fl(v3, v3d->far);
        
        sub_v3_v3v3(v2, center, v3);
        add_v3_v3v3(v1, center, v3);
        
        if (options & DRAWLIGHT) {
            col[0] = col[1] = col[2] = 220;
        }
        else {
            UI_GetThemeColor3ubv(TH_GRID, col);
        }
        UI_make_axis_color(col, col2, axis);
        glColor3ubv(col2);
        
        setlinestyle(0);
        glBegin(GL_LINE_STRIP);
            glVertex3fv(v1);
            glVertex3fv(v2);
        glEnd();
        
        glPopMatrix();
    }
}

void resetTransRestrictions(TransInfo *t)
{
    t->flag &= ~T_ALL_RESTRICTIONS;
}

/* the *op can be NULL */
int initTransInfo (bContext *C, TransInfo *t, wmOperator *op, wmEvent *event)
{
    Scene *sce = CTX_data_scene(C);
    ToolSettings *ts = CTX_data_tool_settings(C);
    ARegion *ar = CTX_wm_region(C);
    ScrArea *sa = CTX_wm_area(C);
    Object *obedit = CTX_data_edit_object(C);
    
    /* moving: is shown in drawobject() (transform color) */
//  TRANSFORM_FIX_ME
//  if(obedit || (t->flag & T_POSE) ) G.moving= G_TRANSFORM_EDIT;
//  else if(G.f & G_PARTICLEEDIT) G.moving= G_TRANSFORM_PARTICLE;
//  else G.moving= G_TRANSFORM_OBJ;
    
    t->scene = sce;
    t->sa = sa;
    t->ar = ar;
    t->obedit = obedit;
    t->settings = ts;
    
    t->data = NULL;
    t->ext = NULL;
    
    t->helpline = HLP_NONE;
    
    t->flag = 0;
    
    t->redraw = 1; /* redraw first time */
    
    if (event)
    {
        copy_v2_v2_int(t->imval, event->mval);
        t->event_type = event->type;
    }
    else
    {
        t->imval[0] = 0;
        t->imval[1] = 0;
    }
    
    t->con.imval[0] = t->imval[0];
    t->con.imval[1] = t->imval[1];
    
    t->mval[0] = t->imval[0];
    t->mval[1] = t->imval[1];
    
    t->transform        = NULL;
    t->handleEvent      = NULL;
    
    t->total            = 0;
    
    t->val = 0.0f;
    
    t->vec[0]           =
        t->vec[1]       =
        t->vec[2]       = 0.0f;
    
    t->center[0]        =
        t->center[1]    =
        t->center[2]    = 0.0f;
    
    unit_m3(t->mat);
    
    /* if there's an event, we're modal */
    if (event) {
        t->flag |= T_MODAL;
    }

    /* Crease needs edge flag */
    if (t->mode == TFM_CREASE) {
        t->options |= CTX_EDGE;
    }


    /* Assign the space type, some exceptions for running in different mode */
    if(sa == NULL) {
        /* background mode */
        t->spacetype= SPACE_EMPTY;
    }
    else if ((ar == NULL) && (sa->spacetype == SPACE_VIEW3D)) {
        /* running in the text editor */
        t->spacetype= SPACE_EMPTY;
    }
    else {
        /* normal operation */
        t->spacetype= sa->spacetype;
    }


    if(t->spacetype == SPACE_VIEW3D)
    {
        View3D *v3d = sa->spacedata.first;
        
        t->view = v3d;
        t->animtimer= CTX_wm_screen(C)->animtimer;
        
        /* turn manipulator off during transform */
        // FIXME: but don't do this when USING the manipulator...
        if (t->flag & T_MODAL) {
            t->twtype = v3d->twtype;
            v3d->twtype = 0;
        }

        if(v3d->flag & V3D_ALIGN) t->flag |= T_V3D_ALIGN;
        t->around = v3d->around;
        
        if (op && RNA_struct_find_property(op->ptr, "constraint_orientation") && RNA_struct_property_is_set(op->ptr, "constraint_orientation"))
        {
            t->current_orientation = RNA_enum_get(op->ptr, "constraint_orientation");
            
            if (t->current_orientation >= V3D_MANIP_CUSTOM + BIF_countTransformOrientation(C))
            {
                t->current_orientation = V3D_MANIP_GLOBAL;
            }
        }
        else
        {
            t->current_orientation = v3d->twmode;
        }

        /* exceptional case */
        if(t->around==V3D_LOCAL && (t->settings->selectmode & SCE_SELECT_FACE)) {
            if(ELEM3(t->mode, TFM_ROTATION, TFM_RESIZE, TFM_TRACKBALL)) {
                t->options |= CTX_NO_PET;
            }
        }

        /* initialize UV transform from */
        if (op && RNA_struct_find_property(op->ptr, "correct_uv")) {
            if(RNA_struct_property_is_set(op->ptr, "correct_uv")) {
                if(RNA_boolean_get(op->ptr, "correct_uv")) {
                    t->settings->uvcalc_flag |= UVCALC_TRANSFORM_CORRECT;
                }
                else {
                    t->settings->uvcalc_flag &= ~UVCALC_TRANSFORM_CORRECT;
                }
            }
            else {
                RNA_boolean_set(op->ptr, "correct_uv", t->settings->uvcalc_flag & UVCALC_TRANSFORM_CORRECT);
            }
        }

    }
    else if(t->spacetype==SPACE_IMAGE)
    {
        SpaceImage *sima = sa->spacedata.first;
        // XXX for now, get View2D from the active region
        t->view = &ar->v2d;
        t->around = sima->around;
    }
    else if(t->spacetype==SPACE_NODE)
    {
        // XXX for now, get View2D from the active region
        t->view = &ar->v2d;
        t->around = V3D_CENTER;
    }
    else if(t->spacetype==SPACE_IPO) 
    {
        SpaceIpo *sipo= sa->spacedata.first;
        t->view = &ar->v2d;
        t->around = sipo->around;
    }
    else
    {
        if(ar) {
            // XXX for now, get View2D  from the active region
            t->view = &ar->v2d;
            // XXX for now, the center point is the midpoint of the data
        }
        else {
            t->view= NULL;
        }
        t->around = V3D_CENTER;
    }
    
    if (op && RNA_struct_property_is_set(op->ptr, "release_confirm"))
    {
        if (RNA_boolean_get(op->ptr, "release_confirm"))
        {
            t->flag |= T_RELEASE_CONFIRM;
        }
    }
    else
    {
        if (U.flag & USER_RELEASECONFIRM)
        {
            t->flag |= T_RELEASE_CONFIRM;
        }
    }

    if (op && RNA_struct_find_property(op->ptr, "mirror") && RNA_struct_property_is_set(op->ptr, "mirror"))
    {
        if (RNA_boolean_get(op->ptr, "mirror"))
        {
            t->flag |= T_MIRROR;
            t->mirror = 1;
        }
    }
    // Need stuff to take it from edit mesh or whatnot here
    else if (t->spacetype == SPACE_VIEW3D)
    {
        if (t->obedit && t->obedit->type == OB_MESH && (((Mesh *)t->obedit->data)->editflag & ME_EDIT_MIRROR_X))
        {
            t->flag |= T_MIRROR;
            t->mirror = 1;
        }
    }
    
    /* setting PET flag only if property exist in operator. Otherwise, assume it's not supported */
    if (op && RNA_struct_find_property(op->ptr, "proportional"))
    {
        if (RNA_struct_property_is_set(op->ptr, "proportional"))
        {
            switch(RNA_enum_get(op->ptr, "proportional"))
            {
            case PROP_EDIT_CONNECTED:
                t->flag |= T_PROP_CONNECTED;
            case PROP_EDIT_ON:
                t->flag |= T_PROP_EDIT;
                break;
            }
        }
        else
        {
            /* use settings from scene only if modal */
            if (t->flag & T_MODAL)
            {
                if ((t->options & CTX_NO_PET) == 0)
                {
                    if (t->obedit && ts->proportional != PROP_EDIT_OFF)
                    {
                        t->flag |= T_PROP_EDIT;

                        if(ts->proportional == PROP_EDIT_CONNECTED)
                            t->flag |= T_PROP_CONNECTED;
                    }
                    else if (t->obedit == NULL && ts->proportional_objects)
                    {
                        t->flag |= T_PROP_EDIT;
                    }
                }
            }
        }
        
        if (op && RNA_struct_find_property(op->ptr, "proportional_size") && RNA_struct_property_is_set(op->ptr, "proportional_size"))
        {
            t->prop_size = RNA_float_get(op->ptr, "proportional_size");
        }
        else
        {
            t->prop_size = ts->proportional_size;
        }
        
        
        /* TRANSFORM_FIX_ME rna restrictions */
        if (t->prop_size <= 0.00001f)
        {
            printf("Proportional size (%f) under 0.00001, reseting to 1!\n", t->prop_size);
            t->prop_size = 1.0f;
        }
        
        if (op && RNA_struct_find_property(op->ptr, "proportional_edit_falloff") && RNA_struct_property_is_set(op->ptr, "proportional_edit_falloff"))
        {
            t->prop_mode = RNA_enum_get(op->ptr, "proportional_edit_falloff");
        }
        else
        {
            t->prop_mode = ts->prop_mode;
        }
    }
    else /* add not pet option to context when not available */
    {
        t->options |= CTX_NO_PET;
    }
    
    // Mirror is not supported with PET, turn it off.
    if (t->flag & T_PROP_EDIT)
    {
        t->flag &= ~T_MIRROR;
    }

    setTransformViewMatrices(t);
    initNumInput(&t->num);
    
    return 1;
}

/* Here I would suggest only TransInfo related issues, like free data & reset vars. Not redraws */
void postTrans (bContext *C, TransInfo *t)
{
    TransData *td;
    
    if (t->draw_handle_view)
        ED_region_draw_cb_exit(t->ar->type, t->draw_handle_view);
    if (t->draw_handle_apply)
        ED_region_draw_cb_exit(t->ar->type, t->draw_handle_apply);
    if (t->draw_handle_pixel)
        ED_region_draw_cb_exit(t->ar->type, t->draw_handle_pixel);
    if (t->draw_handle_cursor)
        WM_paint_cursor_end(CTX_wm_manager(C), t->draw_handle_cursor);

    if (t->customFree) {
        /* Can take over freeing t->data and data2d etc... */
        t->customFree(t);
    }
    else if (t->customData) {
        MEM_freeN(t->customData);
    }

    /* postTrans can be called when nothing is selected, so data is NULL already */
    if (t->data) {
        int a;
        
        /* free data malloced per trans-data */
        for(a=0, td= t->data; a<t->total; a++, td++) {
            if (td->flag & TD_BEZTRIPLE) 
                MEM_freeN(td->hdata);
        }
        MEM_freeN(t->data);
    }
    
    BLI_freelistN(&t->tsnap.points);

    if (t->ext) MEM_freeN(t->ext);
    if (t->data2d) {
        MEM_freeN(t->data2d);
        t->data2d= NULL;
    }
    
    if(t->spacetype==SPACE_IMAGE) {
        SpaceImage *sima= t->sa->spacedata.first;
        if(sima->flag & SI_LIVE_UNWRAP)
            ED_uvedit_live_unwrap_end(t->state == TRANS_CANCEL);
    }
    else if(t->spacetype==SPACE_VIEW3D) {
        View3D *v3d = t->sa->spacedata.first;
        /* restore manipulator */
        if (t->flag & T_MODAL) {
            v3d->twtype = t->twtype;
        }
    }
    
    if (t->mouse.data)
    {
        MEM_freeN(t->mouse.data);
    }
}

void applyTransObjects(TransInfo *t)
{
    TransData *td;
    
    for (td = t->data; td < t->data + t->total; td++) {
        copy_v3_v3(td->iloc, td->loc);
        if (td->ext->rot) {
            copy_v3_v3(td->ext->irot, td->ext->rot);
        }
        if (td->ext->size) {
            copy_v3_v3(td->ext->isize, td->ext->size);
        }
    }
    recalcData(t);
}

static void restoreElement(TransData *td)
{
    /* TransData for crease has no loc */
    if (td->loc) {
        copy_v3_v3(td->loc, td->iloc);
    }
    if (td->val) {
        *td->val = td->ival;
    }

    if (td->ext && (td->flag&TD_NO_EXT)==0) {
        if (td->ext->rot) {
            copy_v3_v3(td->ext->rot, td->ext->irot);
        }
        if(td->ext->rotAngle) {
            *td->ext->rotAngle= td->ext->irotAngle;
        }
        if(td->ext->rotAxis) {
            copy_v3_v3(td->ext->rotAxis, td->ext->irotAxis);
        }
        /* XXX, drotAngle & drotAxis not used yet */
        if (td->ext->size) {
            copy_v3_v3(td->ext->size, td->ext->isize);
        }
        if (td->ext->quat) {
            copy_qt_qt(td->ext->quat, td->ext->iquat);
        }
    }
    
    if (td->flag & TD_BEZTRIPLE) {
        *(td->hdata->h1) = td->hdata->ih1;
        *(td->hdata->h2) = td->hdata->ih2;
    }
}

void restoreTransObjects(TransInfo *t)
{
    TransData *td;
    TransData2D *td2d;

    for (td = t->data; td < t->data + t->total; td++) {
        restoreElement(td);
    }
    
    for (td2d=t->data2d; t->data2d && td2d < t->data2d + t->total; td2d++) {
        if (td2d->h1) {
            td2d->h1[0] = td2d->ih1[0];
            td2d->h1[1] = td2d->ih1[1];
        }
        if (td2d->h2) {
            td2d->h2[0] = td2d->ih2[0];
            td2d->h2[1] = td2d->ih2[1];
        }
    }

    unit_m3(t->mat);
    
    recalcData(t);
}

void calculateCenter2D(TransInfo *t)
{
    if (t->flag & (T_EDIT|T_POSE)) {
        Object *ob= t->obedit?t->obedit:t->poseobj;
        float vec[3];
        
        copy_v3_v3(vec, t->center);
        mul_m4_v3(ob->obmat, vec);
        projectIntView(t, vec, t->center2d);
    }
    else {
        projectIntView(t, t->center, t->center2d);
    }
}

void calculateCenterCursor(TransInfo *t)
{
    float *cursor;
    
    cursor = give_cursor(t->scene, t->view);
    copy_v3_v3(t->center, cursor);
    
    /* If edit or pose mode, move cursor in local space */
    if (t->flag & (T_EDIT|T_POSE)) {
        Object *ob = t->obedit?t->obedit:t->poseobj;
        float mat[3][3], imat[3][3];
        
        sub_v3_v3v3(t->center, t->center, ob->obmat[3]);
        copy_m3_m4(mat, ob->obmat);
        invert_m3_m3(imat, mat);
        mul_m3_v3(imat, t->center);
    }
    
    calculateCenter2D(t);
}

void calculateCenterCursor2D(TransInfo *t)
{
    float aspx=1.0, aspy=1.0;
    float *cursor= NULL;
    
    if(t->spacetype==SPACE_IMAGE) {
        SpaceImage *sima= (SpaceImage *)t->sa->spacedata.first;
        /* only space supported right now but may change */
        ED_space_image_uv_aspect(sima, &aspx, &aspy);
        cursor = sima->cursor;
    }
    
    if (cursor) {
        t->center[0] = cursor[0] * aspx;
        t->center[1] = cursor[1] * aspy;
    }
    
    calculateCenter2D(t);
}

static void calculateCenterCursorGraph2D(TransInfo *t)
{
    SpaceIpo *sipo= (SpaceIpo *)t->sa->spacedata.first;
    Scene *scene= t->scene;
    
    /* cursor is combination of current frame, and graph-editor cursor value */
    t->center[0]= (float)(scene->r.cfra);
    t->center[1]= sipo->cursorVal;
    
    calculateCenter2D(t);
}

void calculateCenterMedian(TransInfo *t)
{
    float partial[3] = {0.0f, 0.0f, 0.0f};
    int total = 0;
    int i;
    
    for(i = 0; i < t->total; i++) {
        if (t->data[i].flag & TD_SELECTED) {
            if (!(t->data[i].flag & TD_NOCENTER))
            {
                add_v3_v3(partial, t->data[i].center);
                total++;
            }
        }
        else {
            /*
               All the selected elements are at the head of the array
               which means we can stop when it finds unselected data
            */
            break;
        }
    }
    if(i)
        mul_v3_fl(partial, 1.0f / total);
    copy_v3_v3(t->center, partial);
    
    calculateCenter2D(t);
}

void calculateCenterBound(TransInfo *t)
{
    float max[3];
    float min[3];
    int i;
    for(i = 0; i < t->total; i++) {
        if (i) {
            if (t->data[i].flag & TD_SELECTED) {
                if (!(t->data[i].flag & TD_NOCENTER))
                    minmax_v3v3_v3(min, max, t->data[i].center);
            }
            else {
                /*
                   All the selected elements are at the head of the array
                   which means we can stop when it finds unselected data
                */
                break;
            }
        }
        else {
            copy_v3_v3(max, t->data[i].center);
            copy_v3_v3(min, t->data[i].center);
        }
    }
    add_v3_v3v3(t->center, min, max);
    mul_v3_fl(t->center, 0.5);
    
    calculateCenter2D(t);
}

void calculateCenter(TransInfo *t)
{
    switch(t->around) {
    case V3D_CENTER:
        calculateCenterBound(t);
        break;
    case V3D_CENTROID:
        calculateCenterMedian(t);
        break;
    case V3D_CURSOR:
        if(t->spacetype==SPACE_IMAGE)
            calculateCenterCursor2D(t);
        else if(t->spacetype==SPACE_IPO)
            calculateCenterCursorGraph2D(t);
        else
            calculateCenterCursor(t);
        break;
    case V3D_LOCAL:
        /* Individual element center uses median center for helpline and such */
        calculateCenterMedian(t);
        break;
    case V3D_ACTIVE:
        {
        /* set median, and if if if... do object center */
        
        /* EDIT MODE ACTIVE EDITMODE ELEMENT */

        if (t->obedit) {
            if(t->obedit->type == OB_MESH) {
                EditSelection ese;
                EditMesh *em = BKE_mesh_get_editmesh(t->obedit->data);

                if (EM_get_actSelection(em, &ese)) {
                    EM_editselection_center(t->center, &ese);
                    calculateCenter2D(t);
                    break;
                }
            }
            else if (ELEM(t->obedit->type, OB_CURVE, OB_SURF)) {
                float center[3];
                Curve *cu= (Curve *)t->obedit->data;

                if (ED_curve_actSelection(cu, center)) {
                    copy_v3_v3(t->center, center);
                    calculateCenter2D(t);
                    break;
                }
            }
        } /* END EDIT MODE ACTIVE ELEMENT */

        calculateCenterMedian(t);
        if((t->flag & (T_EDIT|T_POSE))==0)
        {
            Scene *scene = t->scene;
            Object *ob= OBACT;
            if(ob)
            {
                copy_v3_v3(t->center, ob->obmat[3]);
                projectIntView(t, t->center, t->center2d);
            }
        }
        
        }
    }
    
    /* setting constraint center */
    copy_v3_v3(t->con.center, t->center);
    if(t->flag & (T_EDIT|T_POSE))
    {
        Object *ob= t->obedit?t->obedit:t->poseobj;
        mul_m4_v3(ob->obmat, t->con.center);
    }
    
    /* for panning from cameraview */
    if(t->flag & T_OBJECT)
    {
        if(t->spacetype==SPACE_VIEW3D && t->ar && t->ar->regiontype == RGN_TYPE_WINDOW)
        {
            View3D *v3d = t->view;
            Scene *scene = t->scene;
            RegionView3D *rv3d = t->ar->regiondata;
            
            if(v3d->camera == OBACT && rv3d->persp==RV3D_CAMOB)
            {
                float axis[3];
                /* persinv is nasty, use viewinv instead, always right */
                copy_v3_v3(axis, t->viewinv[2]);
                normalize_v3(axis);
                
                /* 6.0 = 6 grid units */
                axis[0]= t->center[0]- 6.0f*axis[0];
                axis[1]= t->center[1]- 6.0f*axis[1];
                axis[2]= t->center[2]- 6.0f*axis[2];
                
                projectIntView(t, axis, t->center2d);
                
                /* rotate only needs correct 2d center, grab needs initgrabz() value */
                if(t->mode==TFM_TRANSLATION)
                {
                    copy_v3_v3(t->center, axis);
                    copy_v3_v3(t->con.center, t->center);
                }
            }
        }
    }
    
    if(t->spacetype==SPACE_VIEW3D)
    {
        /* initgrabz() defines a factor for perspective depth correction, used in window_to_3d_delta() */
        if(t->flag & (T_EDIT|T_POSE)) {
            Object *ob= t->obedit?t->obedit:t->poseobj;
            float vec[3];
            
            copy_v3_v3(vec, t->center);
            mul_m4_v3(ob->obmat, vec);
            initgrabz(t->ar->regiondata, vec[0], vec[1], vec[2]);
        }
        else {
            initgrabz(t->ar->regiondata, t->center[0], t->center[1], t->center[2]);
        }
    }
}

void calculatePropRatio(TransInfo *t)
{
    TransData *td = t->data;
    int i;
    float dist;
    short connected = t->flag & T_PROP_CONNECTED;

    if (t->flag & T_PROP_EDIT) {
        for(i = 0 ; i < t->total; i++, td++) {
            if (td->flag & TD_SELECTED) {
                td->factor = 1.0f;
            }
            else if (t->flag & T_MIRROR && td->loc[0] * t->mirror < -0.00001f)
            {
                td->flag |= TD_SKIP;
                td->factor = 0.0f;
                restoreElement(td);
            }
            else if ((connected &&
                        (td->flag & TD_NOTCONNECTED || td->dist > t->prop_size))
                ||
                    (connected == 0 &&
                        td->rdist > t->prop_size)) {
                /*
                   The elements are sorted according to their dist member in the array,
                   that means we can stop when it finds one element outside of the propsize.
                */
                td->flag |= TD_NOACTION;
                td->factor = 0.0f;
                restoreElement(td);
            }
            else {
                /* Use rdist for falloff calculations, it is the real distance */
                td->flag &= ~TD_NOACTION;
                
                if (connected)
                    dist= (t->prop_size-td->dist)/t->prop_size;
                else
                    dist= (t->prop_size-td->rdist)/t->prop_size;

                /*
                 * Clamp to positive numbers.
                 * Certain corner cases with connectivity and individual centers
                 * can give values of rdist larger than propsize.
                 */
                if (dist < 0.0f)
                    dist = 0.0f;
                
                switch(t->prop_mode) {
                case PROP_SHARP:
                    td->factor= dist*dist;
                    break;
                case PROP_SMOOTH:
                    td->factor= 3.0f*dist*dist - 2.0f*dist*dist*dist;
                    break;
                case PROP_ROOT:
                    td->factor = (float)sqrt(dist);
                    break;
                case PROP_LIN:
                    td->factor = dist;
                    break;
                case PROP_CONST:
                    td->factor = 1.0f;
                    break;
                case PROP_SPHERE:
                    td->factor = (float)sqrt(2*dist - dist * dist);
                    break;
                case PROP_RANDOM:
                    BLI_srand( BLI_rand() ); /* random seed */
                    td->factor = BLI_frand()*dist;
                    break;
                default:
                    td->factor = 1;
                }
            }
        }
        switch(t->prop_mode) {
        case PROP_SHARP:
            strcpy(t->proptext, "(Sharp)");
            break;
        case PROP_SMOOTH:
            strcpy(t->proptext, "(Smooth)");
            break;
        case PROP_ROOT:
            strcpy(t->proptext, "(Root)");
            break;
        case PROP_LIN:
            strcpy(t->proptext, "(Linear)");
            break;
        case PROP_CONST:
            strcpy(t->proptext, "(Constant)");
            break;
        case PROP_SPHERE:
            strcpy(t->proptext, "(Sphere)");
            break;
        case PROP_RANDOM:
            strcpy(t->proptext, "(Random)");
            break;
        default:
            t->proptext[0]= '\0';
        }
    }
    else {
        for(i = 0 ; i < t->total; i++, td++) {
            td->factor = 1.0;
        }
        t->proptext[0]= '\0';
    }
}