scene.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 <stddef.h>
#include <stdio.h>
#include <string.h>

#ifndef WIN32 
#include <unistd.h>
#else
#include <io.h>
#endif

#include "MEM_guardedalloc.h"

#include "DNA_anim_types.h"
#include "DNA_group_types.h"
#include "DNA_node_types.h"
#include "DNA_object_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
#include "DNA_sequence_types.h"

#include "BLI_math.h"
#include "BLI_blenlib.h"
#include "BLI_utildefines.h"
#include "BLI_callbacks.h"

#include "BKE_anim.h"
#include "BKE_animsys.h"
#include "BKE_depsgraph.h"
#include "BKE_global.h"
#include "BKE_group.h"
#include "BKE_idprop.h"
#include "BKE_library.h"
#include "BKE_main.h"
#include "BKE_node.h"
#include "BKE_object.h"
#include "BKE_paint.h"
#include "BKE_pointcache.h"
#include "BKE_scene.h"
#include "BKE_sequencer.h"
#include "BKE_world.h"

#include "BKE_sound.h"

#include "RE_engine.h"

//XXX #include "BIF_previewrender.h"
//XXX #include "BIF_editseq.h"

#ifdef WIN32
#else
#include <sys/time.h>
#endif

void free_avicodecdata(AviCodecData *acd)
{
    if (acd) {
        if (acd->lpFormat){
            MEM_freeN(acd->lpFormat);
            acd->lpFormat = NULL;
            acd->cbFormat = 0;
        }
        if (acd->lpParms){
            MEM_freeN(acd->lpParms);
            acd->lpParms = NULL;
            acd->cbParms = 0;
        }
    }
}

void free_qtcodecdata(QuicktimeCodecData *qcd)
{
    if (qcd) {
        if (qcd->cdParms){
            MEM_freeN(qcd->cdParms);
            qcd->cdParms = NULL;
            qcd->cdSize = 0;
        }
    }
}

Scene *copy_scene(Scene *sce, int type)
{
    Scene *scen;
    ToolSettings *ts;
    Base *base, *obase;
    
    if(type == SCE_COPY_EMPTY) {
        ListBase lb;
        scen= add_scene(sce->id.name+2);
        
        lb= scen->r.layers;
        scen->r= sce->r;
        scen->r.layers= lb;
    }
    else {
        scen= copy_libblock(&sce->id);
        BLI_duplicatelist(&(scen->base), &(sce->base));
        
        clear_id_newpoins();
        
        id_us_plus((ID *)scen->world);
        id_us_plus((ID *)scen->set);
        id_us_plus((ID *)scen->gm.dome.warptext);

        scen->ed= NULL;
        scen->theDag= NULL;
        scen->obedit= NULL;
        scen->toolsettings= MEM_dupallocN(sce->toolsettings);
        scen->stats= NULL;
        scen->fps_info= NULL;

        ts= scen->toolsettings;
        if(ts) {
            if(ts->vpaint) {
                ts->vpaint= MEM_dupallocN(ts->vpaint);
                ts->vpaint->paintcursor= NULL;
                ts->vpaint->vpaint_prev= NULL;
                ts->vpaint->wpaint_prev= NULL;
                copy_paint(&ts->vpaint->paint, &ts->vpaint->paint);
            }
            if(ts->wpaint) {
                ts->wpaint= MEM_dupallocN(ts->wpaint);
                ts->wpaint->paintcursor= NULL;
                ts->wpaint->vpaint_prev= NULL;
                ts->wpaint->wpaint_prev= NULL;
                copy_paint(&ts->wpaint->paint, &ts->wpaint->paint);
            }
            if(ts->sculpt) {
                ts->sculpt= MEM_dupallocN(ts->sculpt);
                copy_paint(&ts->sculpt->paint, &ts->sculpt->paint);
            }

            copy_paint(&ts->imapaint.paint, &ts->imapaint.paint);
            ts->imapaint.paintcursor= NULL;

            ts->particle.paintcursor= NULL;
        }
        
        BLI_duplicatelist(&(scen->markers), &(sce->markers));
        BLI_duplicatelist(&(scen->transform_spaces), &(sce->transform_spaces));
        BLI_duplicatelist(&(scen->r.layers), &(sce->r.layers));
        BKE_keyingsets_copy(&(scen->keyingsets), &(sce->keyingsets));

        if(sce->nodetree) {
            scen->nodetree= ntreeCopyTree(sce->nodetree); /* copies actions */
            ntreeSwitchID(scen->nodetree, &sce->id, &scen->id);
        }

        obase= sce->base.first;
        base= scen->base.first;
        while(base) {
            id_us_plus(&base->object->id);
            if(obase==sce->basact) scen->basact= base;
    
            obase= obase->next;
            base= base->next;
        }
    }
    
    /* make a private copy of the avicodecdata */
    if(sce->r.avicodecdata) {
        scen->r.avicodecdata = MEM_dupallocN(sce->r.avicodecdata);
        scen->r.avicodecdata->lpFormat = MEM_dupallocN(scen->r.avicodecdata->lpFormat);
        scen->r.avicodecdata->lpParms = MEM_dupallocN(scen->r.avicodecdata->lpParms);
    }
    
    /* make a private copy of the qtcodecdata */
    if(sce->r.qtcodecdata) {
        scen->r.qtcodecdata = MEM_dupallocN(sce->r.qtcodecdata);
        scen->r.qtcodecdata->cdParms = MEM_dupallocN(scen->r.qtcodecdata->cdParms);
    }
    
    if(sce->r.ffcodecdata.properties) { /* intentionally check scen not sce. */
        scen->r.ffcodecdata.properties= IDP_CopyProperty(sce->r.ffcodecdata.properties);
    }

    /* NOTE: part of SCE_COPY_LINK_DATA and SCE_COPY_FULL operations
     * are done outside of blenkernel with ED_objects_single_users! */

    /*  camera */
    if(type == SCE_COPY_LINK_DATA || type == SCE_COPY_FULL) {
        ID_NEW(scen->camera);
    }
    
    /* before scene copy */
    sound_create_scene(scen);

    /* world */
    if(type == SCE_COPY_FULL) {
        BKE_copy_animdata_id_action((ID *)scen);
        if(scen->world) {
            id_us_plus((ID *)scen->world);
            scen->world= copy_world(scen->world);
            BKE_copy_animdata_id_action((ID *)scen->world);
        }

        if(sce->ed) {
            scen->ed= MEM_callocN( sizeof(Editing), "addseq");
            scen->ed->seqbasep= &scen->ed->seqbase;
            seqbase_dupli_recursive(sce, scen, &scen->ed->seqbase, &sce->ed->seqbase, SEQ_DUPE_ALL);
        }
    }

    return scen;
}

/* do not free scene itself */
void free_scene(Scene *sce)
{
    Base *base;

    base= sce->base.first;
    while(base) {
        base->object->id.us--;
        base= base->next;
    }
    /* do not free objects! */
    
    if(sce->gpd) {
#if 0   // removed since this can be invalid memory when freeing everything
        // since the grease pencil data is free'd before the scene.
        // since grease pencil data is not (yet?), shared between objects
        // its probably safe not to do this, some save and reload will free this.
        sce->gpd->id.us--;
#endif
        sce->gpd= NULL;
    }

    BLI_freelistN(&sce->base);
    seq_free_editing(sce);

    BKE_free_animdata((ID *)sce);
    BKE_keyingsets_free(&sce->keyingsets);
    
    if (sce->r.avicodecdata) {
        free_avicodecdata(sce->r.avicodecdata);
        MEM_freeN(sce->r.avicodecdata);
        sce->r.avicodecdata = NULL;
    }
    if (sce->r.qtcodecdata) {
        free_qtcodecdata(sce->r.qtcodecdata);
        MEM_freeN(sce->r.qtcodecdata);
        sce->r.qtcodecdata = NULL;
    }
    if (sce->r.ffcodecdata.properties) {
        IDP_FreeProperty(sce->r.ffcodecdata.properties);
        MEM_freeN(sce->r.ffcodecdata.properties);
        sce->r.ffcodecdata.properties = NULL;
    }
    
    BLI_freelistN(&sce->markers);
    BLI_freelistN(&sce->transform_spaces);
    BLI_freelistN(&sce->r.layers);
    
    if(sce->toolsettings) {
        if(sce->toolsettings->vpaint) {
            free_paint(&sce->toolsettings->vpaint->paint);
            MEM_freeN(sce->toolsettings->vpaint);
        }
        if(sce->toolsettings->wpaint) {
            free_paint(&sce->toolsettings->wpaint->paint);
            MEM_freeN(sce->toolsettings->wpaint);
        }
        if(sce->toolsettings->sculpt) {
            free_paint(&sce->toolsettings->sculpt->paint);
            MEM_freeN(sce->toolsettings->sculpt);
        }
        free_paint(&sce->toolsettings->imapaint.paint);

        MEM_freeN(sce->toolsettings);
        sce->toolsettings = NULL;   
    }
    
    if (sce->theDag) {
        free_forest(sce->theDag);
        MEM_freeN(sce->theDag);
    }
    
    if(sce->nodetree) {
        ntreeFreeTree(sce->nodetree);
        MEM_freeN(sce->nodetree);
    }

    if(sce->stats)
        MEM_freeN(sce->stats);
    if(sce->fps_info)
        MEM_freeN(sce->fps_info);

    sound_destroy_scene(sce);
}

Scene *add_scene(const char *name)
{
    Main *bmain= G.main;
    Scene *sce;
    ParticleEditSettings *pset;
    int a;

    sce= alloc_libblock(&bmain->scene, ID_SCE, name);
    sce->lay= sce->layact= 1;
    
    sce->r.mode= R_GAMMA|R_OSA|R_SHADOW|R_SSS|R_ENVMAP|R_RAYTRACE;
    sce->r.cfra= 1;
    sce->r.sfra= 1;
    sce->r.efra= 250;
    sce->r.frame_step= 1;
    sce->r.xsch= 1920;
    sce->r.ysch= 1080;
    sce->r.xasp= 1;
    sce->r.yasp= 1;
    sce->r.xparts= 8;
    sce->r.yparts= 8;
    sce->r.mblur_samples= 1;
    sce->r.filtertype= R_FILTER_MITCH;
    sce->r.size= 50;

    sce->r.im_format.planes= R_IMF_PLANES_RGB;
    sce->r.im_format.imtype= R_IMF_IMTYPE_PNG;
    sce->r.im_format.quality= 90;

    sce->r.displaymode= R_OUTPUT_AREA;
    sce->r.framapto= 100;
    sce->r.images= 100;
    sce->r.framelen= 1.0;
    sce->r.blurfac= 0.5;
    sce->r.frs_sec= 24;
    sce->r.frs_sec_base= 1;
    sce->r.edgeint= 10;
    sce->r.ocres = 128;
    sce->r.color_mgt_flag |= R_COLOR_MANAGEMENT;
    sce->r.gauss= 1.0;
    
    /* deprecated but keep for upwards compat */
    sce->r.postgamma= 1.0;
    sce->r.posthue= 0.0;
    sce->r.postsat= 1.0;
    
    sce->r.bake_mode= 1;    /* prevent to include render stuff here */
    sce->r.bake_filter= 2;
    sce->r.bake_osa= 5;
    sce->r.bake_flag= R_BAKE_CLEAR;
    sce->r.bake_normal_space= R_BAKE_SPACE_TANGENT;
    sce->r.scemode= R_DOCOMP|R_DOSEQ|R_EXTENSION;
    sce->r.stamp= R_STAMP_TIME|R_STAMP_FRAME|R_STAMP_DATE|R_STAMP_CAMERA|R_STAMP_SCENE|R_STAMP_FILENAME|R_STAMP_RENDERTIME;
    sce->r.stamp_font_id= 12;
    sce->r.fg_stamp[0]= sce->r.fg_stamp[1]= sce->r.fg_stamp[2]= 0.8f;
    sce->r.fg_stamp[3]= 1.0f;
    sce->r.bg_stamp[0]= sce->r.bg_stamp[1]= sce->r.bg_stamp[2]= 0.0f;
    sce->r.bg_stamp[3]= 0.25f;
    sce->r.raytrace_options = R_RAYTRACE_USE_INSTANCES;

    sce->r.seq_prev_type= OB_SOLID;
    sce->r.seq_rend_type= OB_SOLID;
    sce->r.seq_flag= R_SEQ_GL_PREV;

    sce->r.threads= 1;

    sce->r.simplify_subsurf= 6;
    sce->r.simplify_particles= 1.0f;
    sce->r.simplify_shadowsamples= 16;
    sce->r.simplify_aosss= 1.0f;

    sce->r.border.xmin= 0.0f;
    sce->r.border.ymin= 0.0f;
    sce->r.border.xmax= 1.0f;
    sce->r.border.ymax= 1.0f;
    
    sce->toolsettings = MEM_callocN(sizeof(struct ToolSettings),"Tool Settings Struct");
    sce->toolsettings->cornertype=1;
    sce->toolsettings->degr = 90; 
    sce->toolsettings->step = 9;
    sce->toolsettings->turn = 1;                
    sce->toolsettings->extr_offs = 1; 
    sce->toolsettings->doublimit = 0.001;
    sce->toolsettings->segments = 32;
    sce->toolsettings->rings = 32;
    sce->toolsettings->vertices = 32;
    sce->toolsettings->editbutflag = 1;
    sce->toolsettings->uvcalc_radius = 1.0f;
    sce->toolsettings->uvcalc_cubesize = 1.0f;
    sce->toolsettings->uvcalc_mapdir = 1;
    sce->toolsettings->uvcalc_mapalign = 1;
    sce->toolsettings->unwrapper = 1;
    sce->toolsettings->select_thresh= 0.01f;
    sce->toolsettings->jointrilimit = 0.8f;

    sce->toolsettings->selectmode= SCE_SELECT_VERTEX;
    sce->toolsettings->uv_selectmode= UV_SELECT_VERTEX;
    sce->toolsettings->normalsize= 0.1;
    sce->toolsettings->autokey_mode= U.autokey_mode;

    sce->toolsettings->skgen_resolution = 100;
    sce->toolsettings->skgen_threshold_internal     = 0.01f;
    sce->toolsettings->skgen_threshold_external     = 0.01f;
    sce->toolsettings->skgen_angle_limit            = 45.0f;
    sce->toolsettings->skgen_length_ratio           = 1.3f;
    sce->toolsettings->skgen_length_limit           = 1.5f;
    sce->toolsettings->skgen_correlation_limit      = 0.98f;
    sce->toolsettings->skgen_symmetry_limit         = 0.1f;
    sce->toolsettings->skgen_postpro = SKGEN_SMOOTH;
    sce->toolsettings->skgen_postpro_passes = 1;
    sce->toolsettings->skgen_options = SKGEN_FILTER_INTERNAL|SKGEN_FILTER_EXTERNAL|SKGEN_FILTER_SMART|SKGEN_HARMONIC|SKGEN_SUB_CORRELATION|SKGEN_STICK_TO_EMBEDDING;
    sce->toolsettings->skgen_subdivisions[0] = SKGEN_SUB_CORRELATION;
    sce->toolsettings->skgen_subdivisions[1] = SKGEN_SUB_LENGTH;
    sce->toolsettings->skgen_subdivisions[2] = SKGEN_SUB_ANGLE;

    sce->toolsettings->proportional_size = 1.0f;

    sce->physics_settings.gravity[0] = 0.0f;
    sce->physics_settings.gravity[1] = 0.0f;
    sce->physics_settings.gravity[2] = -9.81f;
    sce->physics_settings.flag = PHYS_GLOBAL_GRAVITY;

    sce->unit.scale_length = 1.0f;

    pset= &sce->toolsettings->particle;
    pset->flag= PE_KEEP_LENGTHS|PE_LOCK_FIRST|PE_DEFLECT_EMITTER|PE_AUTO_VELOCITY;
    pset->emitterdist= 0.25f;
    pset->totrekey= 5;
    pset->totaddkey= 5;
    pset->brushtype= PE_BRUSH_NONE;
    pset->draw_step= 2;
    pset->fade_frames= 2;
    pset->selectmode= SCE_SELECT_PATH;
    for(a=0; a<PE_TOT_BRUSH; a++) {
        pset->brush[a].strength= 0.5;
        pset->brush[a].size= 50;
        pset->brush[a].step= 10;
        pset->brush[a].count= 10;
    }
    pset->brush[PE_BRUSH_CUT].strength= 100;

    sce->r.ffcodecdata.audio_mixrate = 44100;
    sce->r.ffcodecdata.audio_volume = 1.0f;
    sce->r.ffcodecdata.audio_bitrate = 192;
    sce->r.ffcodecdata.audio_channels = 2;

    BLI_strncpy(sce->r.engine, "BLENDER_RENDER", sizeof(sce->r.engine));

    sce->audio.distance_model = 2.0f;
    sce->audio.doppler_factor = 1.0f;
    sce->audio.speed_of_sound = 343.3f;
    sce->audio.volume = 1.0f;

    BLI_strncpy(sce->r.pic, U.renderdir, sizeof(sce->r.pic));

    BLI_init_rctf(&sce->r.safety, 0.1f, 0.9f, 0.1f, 0.9f);
    sce->r.osa= 8;

    /* note; in header_info.c the scene copy happens..., if you add more to renderdata it has to be checked there */
    scene_add_render_layer(sce, NULL);
    
    /* game data */
    sce->gm.stereoflag = STEREO_NOSTEREO;
    sce->gm.stereomode = STEREO_ANAGLYPH;
    sce->gm.eyeseparation = 0.10;

    sce->gm.dome.angle = 180;
    sce->gm.dome.mode = DOME_FISHEYE;
    sce->gm.dome.res = 4;
    sce->gm.dome.resbuf = 1.0f;
    sce->gm.dome.tilt = 0;

    sce->gm.xplay= 640;
    sce->gm.yplay= 480;
    sce->gm.freqplay= 60;
    sce->gm.depth= 32;

    sce->gm.gravity= 9.8f;
    sce->gm.physicsEngine= WOPHY_BULLET;
    sce->gm.mode = 32; //XXX ugly harcoding, still not sure we should drop mode. 32 == 1 << 5 == use_occlusion_culling 
    sce->gm.occlusionRes = 128;
    sce->gm.ticrate = 60;
    sce->gm.maxlogicstep = 5;
    sce->gm.physubstep = 1;
    sce->gm.maxphystep = 5;

    sce->gm.flag = GAME_DISPLAY_LISTS;
    sce->gm.matmode = GAME_MAT_MULTITEX;

    sce->gm.obstacleSimulation= OBSTSIMULATION_NONE;
    sce->gm.levelHeight = 2.f;

    sce->gm.recastData.cellsize = 0.3f;
    sce->gm.recastData.cellheight = 0.2f;
    sce->gm.recastData.agentmaxslope = M_PI/2;
    sce->gm.recastData.agentmaxclimb = 0.9f;
    sce->gm.recastData.agentheight = 2.0f;
    sce->gm.recastData.agentradius = 0.6f;
    sce->gm.recastData.edgemaxlen = 12.0f;
    sce->gm.recastData.edgemaxerror = 1.3f;
    sce->gm.recastData.regionminsize = 8.f;
    sce->gm.recastData.regionmergesize = 20.f;
    sce->gm.recastData.vertsperpoly = 6;
    sce->gm.recastData.detailsampledist = 6.0f;
    sce->gm.recastData.detailsamplemaxerror = 1.0f;

    sound_create_scene(sce);

    return sce;
}

Base *object_in_scene(Object *ob, Scene *sce)
{
    Base *base;
    
    base= sce->base.first;
    while(base) {
        if(base->object == ob) return base;
        base= base->next;
    }
    return NULL;
}

void set_scene_bg(Main *bmain, Scene *scene)
{
    Scene *sce;
    Base *base;
    Object *ob;
    Group *group;
    GroupObject *go;
    int flag;
    
    /* check for cyclic sets, for reading old files but also for definite security (py?) */
    scene_check_setscene(bmain, scene);
    
    /* can happen when switching modes in other scenes */
    if(scene->obedit && !(scene->obedit->mode & OB_MODE_EDIT))
        scene->obedit= NULL;

    /* deselect objects (for dataselect) */
    for(ob= bmain->object.first; ob; ob= ob->id.next)
        ob->flag &= ~(SELECT|OB_FROMGROUP);

    /* group flags again */
    for(group= bmain->group.first; group; group= group->id.next) {
        go= group->gobject.first;
        while(go) {
            if(go->ob) go->ob->flag |= OB_FROMGROUP;
            go= go->next;
        }
    }

    /* sort baselist */
    DAG_scene_sort(bmain, scene);
    
    /* ensure dags are built for sets */
    for(sce= scene->set; sce; sce= sce->set)
        if(sce->theDag==NULL)
            DAG_scene_sort(bmain, sce);

    /* copy layers and flags from bases to objects */
    for(base= scene->base.first; base; base= base->next) {
        ob= base->object;
        ob->lay= base->lay;
        
        /* group patch... */
        base->flag &= ~(OB_FROMGROUP);
        flag= ob->flag & (OB_FROMGROUP);
        base->flag |= flag;
        
        /* not too nice... for recovering objects with lost data */
        //if(ob->pose==NULL) base->flag &= ~OB_POSEMODE;
        ob->flag= base->flag;
        
        ob->ctime= -1234567.0;  /* force ipo to be calculated later */
    }
    /* no full animation update, this to enable render code to work (render code calls own animation updates) */
}

/* called from creator.c */
Scene *set_scene_name(Main *bmain, const char *name)
{
    Scene *sce= (Scene *)find_id("SC", name);
    if(sce) {
        set_scene_bg(bmain, sce);
        printf("Scene switch: '%s' in file: '%s'\n", name, G.main->name);
        return sce;
    }

    printf("Can't find scene: '%s' in file: '%s'\n", name, G.main->name);
    return NULL;
}

void unlink_scene(Main *bmain, Scene *sce, Scene *newsce)
{
    Scene *sce1;
    bScreen *sc;

    /* check all sets */
    for(sce1= bmain->scene.first; sce1; sce1= sce1->id.next)
        if(sce1->set == sce)
            sce1->set= NULL;
    
    /* check all sequences */
    clear_scene_in_allseqs(bmain, sce);

    /* check render layer nodes in other scenes */
    clear_scene_in_nodes(bmain, sce);
    
    /* al screens */
    for(sc= bmain->screen.first; sc; sc= sc->id.next)
        if(sc->scene == sce)
            sc->scene= newsce;

    free_libblock(&bmain->scene, sce);
}

/* used by metaballs
 * doesnt return the original duplicated object, only dupli's
 */
int next_object(Scene **scene, int val, Base **base, Object **ob)
{
    static ListBase *duplilist= NULL;
    static DupliObject *dupob;
    static int fase= F_START, in_next_object= 0;
    int run_again=1;
    
    /* init */
    if(val==0) {
        fase= F_START;
        dupob= NULL;
        
        /* XXX particle systems with metas+dupligroups call this recursively */
        /* see bug #18725 */
        if(in_next_object) {
            printf("ERROR: MetaBall generation called recursively, not supported\n");
            
            return F_ERROR;
        }
    }
    else {
        in_next_object= 1;
        
        /* run_again is set when a duplilist has been ended */
        while(run_again) {
            run_again= 0;

            /* the first base */
            if(fase==F_START) {
                *base= (*scene)->base.first;
                if(*base) {
                    *ob= (*base)->object;
                    fase= F_SCENE;
                }
                else {
                    /* exception: empty scene */
                    while((*scene)->set) {
                        (*scene)= (*scene)->set;
                        if((*scene)->base.first) {
                            *base= (*scene)->base.first;
                            *ob= (*base)->object;
                            fase= F_SCENE;
                            break;
                        }
                    }
                }
            }
            else {
                if(*base && fase!=F_DUPLI) {
                    *base= (*base)->next;
                    if(*base) *ob= (*base)->object;
                    else {
                        if(fase==F_SCENE) {
                            /* (*scene) is finished, now do the set */
                            while((*scene)->set) {
                                (*scene)= (*scene)->set;
                                if((*scene)->base.first) {
                                    *base= (*scene)->base.first;
                                    *ob= (*base)->object;
                                    break;
                                }
                            }
                        }
                    }
                }
            }
            
            if(*base == NULL) fase= F_START;
            else {
                if(fase!=F_DUPLI) {
                    if( (*base)->object->transflag & OB_DUPLI) {
                        /* groups cannot be duplicated for mballs yet, 
                        this enters eternal loop because of 
                        makeDispListMBall getting called inside of group_duplilist */
                        if((*base)->object->dup_group == NULL) {
                            duplilist= object_duplilist((*scene), (*base)->object);
                            
                            dupob= duplilist->first;

                            if(!dupob)
                                free_object_duplilist(duplilist);
                        }
                    }
                }
                /* handle dupli's */
                if(dupob) {
                    
                    copy_m4_m4(dupob->ob->obmat, dupob->mat);
                    
                    (*base)->flag |= OB_FROMDUPLI;
                    *ob= dupob->ob;
                    fase= F_DUPLI;
                    
                    dupob= dupob->next;
                }
                else if(fase==F_DUPLI) {
                    fase= F_SCENE;
                    (*base)->flag &= ~OB_FROMDUPLI;
                    
                    for(dupob= duplilist->first; dupob; dupob= dupob->next) {
                        copy_m4_m4(dupob->ob->obmat, dupob->omat);
                    }
                    
                    free_object_duplilist(duplilist);
                    duplilist= NULL;
                    run_again= 1;
                }
            }
        }
    }
    
    /* if(ob && *ob) {
        printf("Scene: '%s', '%s'\n", (*scene)->id.name+2, (*ob)->id.name+2);
    } */

    /* reset recursion test */
    in_next_object= 0;
    
    return fase;
}

Object *scene_find_camera(Scene *sc)
{
    Base *base;
    
    for (base= sc->base.first; base; base= base->next)
        if (base->object->type==OB_CAMERA)
            return base->object;

    return NULL;
}

#ifdef DURIAN_CAMERA_SWITCH
Object *scene_camera_switch_find(Scene *scene)
{
    TimeMarker *m;
    int cfra = scene->r.cfra;
    int frame = -(MAXFRAME + 1);
    Object *camera= NULL;

    for (m= scene->markers.first; m; m= m->next) {
        if(m->camera && (m->camera->restrictflag & OB_RESTRICT_RENDER)==0 && (m->frame <= cfra) && (m->frame > frame)) {
            camera= m->camera;
            frame= m->frame;

            if(frame == cfra)
                break;

        }
    }
    return camera;
}
#endif

int scene_camera_switch_update(Scene *scene)
{
#ifdef DURIAN_CAMERA_SWITCH
    Object *camera= scene_camera_switch_find(scene);
    if(camera) {
        scene->camera= camera;
        return 1;
    }
#else
    (void)scene;
#endif
    return 0;
}

char *scene_find_marker_name(Scene *scene, int frame)
{
    ListBase *markers= &scene->markers;
    TimeMarker *m1, *m2;

    /* search through markers for match */
    for (m1=markers->first, m2=markers->last; m1 && m2; m1=m1->next, m2=m2->prev) {
        if (m1->frame==frame)
            return m1->name;

        if (m1 == m2)
            break;

        if (m2->frame==frame)
            return m2->name;
    }

    return NULL;
}

/* return the current marker for this frame,
we can have more then 1 marker per frame, this just returns the first :/ */
char *scene_find_last_marker_name(Scene *scene, int frame)
{
    TimeMarker *marker, *best_marker = NULL;
    int best_frame = -MAXFRAME*2;
    for (marker= scene->markers.first; marker; marker= marker->next) {
        if (marker->frame==frame) {
            return marker->name;
        }

        if ( marker->frame > best_frame && marker->frame < frame) {
            best_marker = marker;
            best_frame = marker->frame;
        }
    }

    return best_marker ? best_marker->name : NULL;
}


Base *scene_add_base(Scene *sce, Object *ob)
{
    Base *b= MEM_callocN(sizeof(*b), "scene_add_base");
    BLI_addhead(&sce->base, b);

    b->object= ob;
    b->flag= ob->flag;
    b->lay= ob->lay;

    return b;
}

void scene_deselect_all(Scene *sce)
{
    Base *b;

    for (b= sce->base.first; b; b= b->next) {
        b->flag&= ~SELECT;
        b->object->flag= b->flag;
    }
}

void scene_select_base(Scene *sce, Base *selbase)
{
    scene_deselect_all(sce);

    selbase->flag |= SELECT;
    selbase->object->flag= selbase->flag;

    sce->basact= selbase;
}

/* checks for cycle, returns 1 if it's all OK */
int scene_check_setscene(Main *bmain, Scene *sce)
{
    Scene *scene;
    int a, totscene;
    
    if(sce->set==NULL) return 1;
    
    totscene= 0;
    for(scene= bmain->scene.first; scene; scene= scene->id.next)
        totscene++;
    
    for(a=0, scene=sce; scene->set; scene=scene->set, a++) {
        /* more iterations than scenes means we have a cycle */
        if(a > totscene) {
            /* the tested scene gets zero'ed, that's typically current scene */
            sce->set= NULL;
            return 0;
        }
    }

    return 1;
}

/* This function is needed to cope with fractional frames - including two Blender rendering features
 * mblur (motion blur that renders 'subframes' and blurs them together), and fields rendering. 
 */
float BKE_curframe(Scene *scene)
{
    return BKE_frame_to_ctime(scene, scene->r.cfra);
}

/* This function is used to obtain arbitrary fractional frames */
float BKE_frame_to_ctime(Scene *scene, const float frame)
{
    float ctime = frame;
    ctime += scene->r.subframe;
    ctime *= scene->r.framelen; 
    
    return ctime;
}

/* drivers support/hacks 
 *  - this method is called from scene_update_tagged_recursive(), so gets included in viewport + render
 *  - these are always run since the depsgraph can't handle non-object data
 *  - these happen after objects are all done so that we can read in their final transform values,
 *    though this means that objects can't refer to scene info for guidance...
 */
static void scene_update_drivers(Main *UNUSED(bmain), Scene *scene)
{
    float ctime = BKE_curframe(scene);
    
    /* scene itself */
    if (scene->adt && scene->adt->drivers.first) {
        BKE_animsys_evaluate_animdata(scene, &scene->id, scene->adt, ctime, ADT_RECALC_DRIVERS);
    }
    
    /* world */
    // TODO: what about world textures? but then those have nodes too...
    if (scene->world) {
        ID *wid = (ID *)scene->world;
        AnimData *adt= BKE_animdata_from_id(wid);
        
        if (adt && adt->drivers.first)
            BKE_animsys_evaluate_animdata(scene, wid, adt, ctime, ADT_RECALC_DRIVERS);
    }
    
    /* nodes */
    if (scene->nodetree) {
        ID *nid = (ID *)scene->nodetree;
        AnimData *adt= BKE_animdata_from_id(nid);
        
        if (adt && adt->drivers.first)
            BKE_animsys_evaluate_animdata(scene, nid, adt, ctime, ADT_RECALC_DRIVERS);
    }
}

static void scene_update_tagged_recursive(Main *bmain, Scene *scene, Scene *scene_parent)
{
    Base *base;
    
    
    scene->customdata_mask= scene_parent->customdata_mask;

    /* sets first, we allow per definition current scene to have
       dependencies on sets, but not the other way around. */
    if (scene->set)
        scene_update_tagged_recursive(bmain, scene->set, scene_parent);
    
    /* scene objects */
    for (base= scene->base.first; base; base= base->next) {
        Object *ob= base->object;
        
        object_handle_update(scene_parent, ob);
        
        if(ob->dup_group && (ob->transflag & OB_DUPLIGROUP))
            group_handle_recalc_and_update(scene_parent, ob, ob->dup_group);
            
        /* always update layer, so that animating layers works */
        base->lay= ob->lay;
    }
    
    /* scene drivers... */
    scene_update_drivers(bmain, scene);

    /* update sound system animation */
    sound_update_scene(scene);
}

/* this is called in main loop, doing tagged updates before redraw */
void scene_update_tagged(Main *bmain, Scene *scene)
{
    /* keep this first */
    BLI_exec_cb(bmain, &scene->id, BLI_CB_EVT_SCENE_UPDATE_PRE);

    /* flush recalc flags to dependencies */
    DAG_ids_flush_tagged(bmain);

    scene->physics_settings.quick_cache_step= 0;

    /* update all objects: drivers, matrices, displists, etc. flags set
       by depgraph or manual, no layer check here, gets correct flushed

       in the future this should handle updates for all datablocks, not
       only objects and scenes. - brecht */
    scene_update_tagged_recursive(bmain, scene, scene);

    /* extra call here to recalc scene animation (for sequencer) */
    {
        AnimData *adt= BKE_animdata_from_id(&scene->id);
        float ctime = BKE_curframe(scene);
        
        if (adt && (adt->recalc & ADT_RECALC_ANIM))
            BKE_animsys_evaluate_animdata(scene, &scene->id, adt, ctime, 0);
    }
    
    /* quick point cache updates */
    if (scene->physics_settings.quick_cache_step)
        BKE_ptcache_quick_cache_all(bmain, scene);

    /* notify editors and python about recalc */
    BLI_exec_cb(bmain, &scene->id, BLI_CB_EVT_SCENE_UPDATE_POST);
    DAG_ids_check_recalc(bmain, scene, FALSE);

    /* clear recalc flags */
    DAG_ids_clear_recalc(bmain);
}

/* applies changes right away, does all sets too */
void scene_update_for_newframe(Main *bmain, Scene *sce, unsigned int lay)
{
    float ctime = BKE_curframe(sce);
    Scene *sce_iter;

    /* keep this first */
    BLI_exec_cb(bmain, &sce->id, BLI_CB_EVT_FRAME_CHANGE_PRE);
    BLI_exec_cb(bmain, &sce->id, BLI_CB_EVT_SCENE_UPDATE_PRE);

    sound_set_cfra(sce->r.cfra);
    
    /* clear animation overrides */
    // XXX TODO...

    for(sce_iter= sce; sce_iter; sce_iter= sce_iter->set) {
        if(sce_iter->theDag==NULL)
            DAG_scene_sort(bmain, sce_iter);
    }

    /* flush recalc flags to dependencies, if we were only changing a frame
       this would not be necessary, but if a user or a script has modified
       some datablock before scene_update_tagged was called, we need the flush */
    DAG_ids_flush_tagged(bmain);

    /* Following 2 functions are recursive
     * so dont call within 'scene_update_tagged_recursive' */
    DAG_scene_update_flags(bmain, sce, lay, TRUE);   // only stuff that moves or needs display still

    /* All 'standard' (i.e. without any dependencies) animation is handled here,
     * with an 'local' to 'macro' order of evaluation. This should ensure that
     * settings stored nestled within a hierarchy (i.e. settings in a Texture block
     * can be overridden by settings from Scene, which owns the Texture through a hierarchy
     * such as Scene->World->MTex/Texture) can still get correctly overridden.
     */
    BKE_animsys_evaluate_all_animation(bmain, sce, ctime);
    /*...done with recusrive funcs */

    /* object_handle_update() on all objects, groups and sets */
    scene_update_tagged_recursive(bmain, sce, sce);

    /* notify editors and python about recalc */
    BLI_exec_cb(bmain, &sce->id, BLI_CB_EVT_SCENE_UPDATE_POST);
    BLI_exec_cb(bmain, &sce->id, BLI_CB_EVT_FRAME_CHANGE_POST);

    DAG_ids_check_recalc(bmain, sce, TRUE);

    /* clear recalc flags */
    DAG_ids_clear_recalc(bmain);
}

/* return default layer, also used to patch old files */
SceneRenderLayer *scene_add_render_layer(Scene *sce, const char *name)
{
    SceneRenderLayer *srl;

    if(!name)
        name= "RenderLayer";

    srl= MEM_callocN(sizeof(SceneRenderLayer), "new render layer");
    BLI_strncpy(srl->name, name, sizeof(srl->name));
    BLI_uniquename(&sce->r.layers, srl, "RenderLayer", '.', offsetof(SceneRenderLayer, name), sizeof(srl->name));
    BLI_addtail(&sce->r.layers, srl);

    /* note, this is also in render, pipeline.c, to make layer when scenedata doesnt have it */
    srl->lay= (1<<20) -1;
    srl->layflag= 0x7FFF;   /* solid ztra halo edge strand */
    srl->passflag= SCE_PASS_COMBINED|SCE_PASS_Z;

    return srl;
}

int scene_remove_render_layer(Main *bmain, Scene *scene, SceneRenderLayer *srl)
{
    const int act= BLI_findindex(&scene->r.layers, srl);
    Scene *sce;

    if (act == -1) {
        return 0;
    }
    else if ( (scene->r.layers.first == scene->r.layers.last) &&
              (scene->r.layers.first == srl))
    {
        /* ensure 1 layer is kept */
        return 0;
    }

    BLI_remlink(&scene->r.layers, srl);
    MEM_freeN(srl);

    scene->r.actlay= 0;

    for(sce = bmain->scene.first; sce; sce = sce->id.next) {
        if(sce->nodetree) {
            bNode *node;
            for(node = sce->nodetree->nodes.first; node; node = node->next) {
                if(node->type==CMP_NODE_R_LAYERS && (Scene*)node->id==scene) {
                    if(node->custom1==act)
                        node->custom1= 0;
                    else if(node->custom1>act)
                        node->custom1--;
                }
            }
        }
    }

    return 1;
}

/* render simplification */

int get_render_subsurf_level(RenderData *r, int lvl)
{
    if(r->mode & R_SIMPLIFY)
        return MIN2(r->simplify_subsurf, lvl);
    else
        return lvl;
}

int get_render_child_particle_number(RenderData *r, int num)
{
    if(r->mode & R_SIMPLIFY)
        return (int)(r->simplify_particles*num);
    else
        return num;
}

int get_render_shadow_samples(RenderData *r, int samples)
{
    if((r->mode & R_SIMPLIFY) && samples > 0)
        return MIN2(r->simplify_shadowsamples, samples);
    else
        return samples;
}

float get_render_aosss_error(RenderData *r, float error)
{
    if(r->mode & R_SIMPLIFY)
        return ((1.0f-r->simplify_aosss)*10.0f + 1.0f)*error;
    else
        return error;
}

/* helper function for the SETLOOPER macro */
Base *_setlooper_base_step(Scene **sce_iter, Base *base)
{
    if(base && base->next) {
        /* common case, step to the next */
        return base->next;
    }
    else if(base==NULL && (*sce_iter)->base.first) {
        /* first time looping, return the scenes first base */
        return (Base *)(*sce_iter)->base.first;
    }
    else {
        /* reached the end, get the next base in the set */
        while((*sce_iter= (*sce_iter)->set)) {
            base= (Base *)(*sce_iter)->base.first;
            if(base) {
                return base;
            }
        }
    }

    return NULL;
}

int scene_use_new_shading_nodes(Scene *scene)
{
    RenderEngineType *type= RE_engines_find(scene->r.engine);
    return (type && type->flag & RE_USE_SHADING_NODES);
}