Fix #20965: metaballs partticles and volume material crash rendering

Fix #21187: 2.5svn26947 - particles + meta sphere = crash in rendering

Use separated displists for mballs in view3d and render stuff.
Do not recalculate displist for view3d while rendering - mball.c
uses several global variables which shouldn't be accepted from
parallel threads.

source/blender/blenkernel/BKE_displist.h

@@ -93,6 +93,7 @@ extern void makeDispListCurveTypes(struct Scene *scene, struct Object *ob, int f
 extern void makeDispListCurveTypes_forRender(struct Scene *scene, struct Object *ob, struct ListBase *dispbase, struct DerivedMesh **derivedFinal, int forOrco);
 extern void makeDispListCurveTypes_forOrco(struct Scene *scene, struct Object *ob, struct ListBase *dispbase);
 extern void makeDispListMBall(struct Scene *scene, struct Object *ob);
+extern void makeDispListMBall_forRender(struct Scene *scene, struct Object *ob, struct ListBase *dispbase);
 extern void shadeDispList(struct Scene *scene, struct Base *base);
 extern void shadeMeshMCol(struct Scene *scene, struct Object *ob, struct Mesh *me);
 

source/blender/blenkernel/BKE_lattice.h

@@ -49,7 +49,7 @@ void init_latt_deform(struct Object *oblatt, struct Object *ob);
 void calc_latt_deform(struct Object *, float *co, float weight);
 void end_latt_deform(struct Object *);
 
-int object_deform_mball(struct Object *ob);
+int object_deform_mball(struct Object *ob, struct ListBase *dispbase);
 void outside_lattice(struct Lattice *lt);
 
 void curve_deform_verts(struct Scene *scene, struct Object *cuOb, struct Object *target, 

source/blender/blenkernel/BKE_mball.h

@@ -164,12 +164,12 @@ struct MetaBall *add_mball(char *name);
 struct MetaBall *copy_mball(struct MetaBall *mb);
 void make_local_mball(struct MetaBall *mb);
 void tex_space_mball(struct Object *ob);
-float *make_orco_mball(struct Object *ob);
+float *make_orco_mball(struct Object *ob, struct ListBase *dispbase);
 void copy_mball_properties(struct Scene *scene, struct Object *active_object);
 struct Object *find_basis_mball(struct Scene *scene, struct Object *ob);
 int is_basis_mball(struct Object *ob);
 int is_mball_basis_for(struct Object *ob1, struct Object *ob2);
-void metaball_polygonize(struct Scene *scene, struct Object *ob);
+void metaball_polygonize(struct Scene *scene, struct Object *ob, struct ListBase *dispbase);
 void calc_mballco(struct MetaElem *ml, float *vec);
 float densfunc(struct MetaElem *ball, float x, float y, float z);
 float metaball(float x, float y, float z);

source/blender/blenkernel/intern/displist.c

@@ -1172,20 +1172,30 @@ void makeDispListMBall(Scene *scene, Object *ob)
 {
 	if(!ob || ob->type!=OB_MBALL) return;
 
+	// XXX: mball stuff uses plenty of global variables
+	//      while this is unchanged updating during render is unsafe
+	if(G.rendering) return;
+
 	freedisplist(&(ob->disp));
-	
+
 	if(ob->type==OB_MBALL) {
 		if(ob==find_basis_mball(scene, ob)) {
-			metaball_polygonize(scene, ob);
+			metaball_polygonize(scene, ob, &ob->disp);
 			tex_space_mball(ob);
 
-			object_deform_mball(ob);
+			object_deform_mball(ob, &ob->disp);
 		}
 	}
 	
 	boundbox_displist(ob);
 }
 
+void makeDispListMBall_forRender(Scene *scene, Object *ob, ListBase *dispbase)
+{
+	metaball_polygonize(scene, ob, dispbase);
+	object_deform_mball(ob, dispbase);
+}
+
 static ModifierData *curve_get_tesselate_point(Scene *scene, Object *ob, int forRender, int editmode)
 {
 	ModifierData *md = modifiers_getVirtualModifierList(ob);

source/blender/blenkernel/intern/lattice.c

@@ -869,12 +869,12 @@ void lattice_deform_verts(Object *laOb, Object *target, DerivedMesh *dm,
 	end_latt_deform(laOb);
 }
 
-int object_deform_mball(Object *ob)
+int object_deform_mball(Object *ob, ListBase *dispbase)
 {
 	if(ob->parent && ob->parent->type==OB_LATTICE && ob->partype==PARSKEL) {
 		DispList *dl;
 
-		for (dl=ob->disp.first; dl; dl=dl->next) {
+		for (dl=dispbase->first; dl; dl=dl->next) {
 			lattice_deform_verts(ob->parent, ob, NULL,
 								 (float(*)[3]) dl->verts, dl->nr, NULL);
 		}

source/blender/blenkernel/intern/mball.c

@@ -226,7 +226,7 @@ void tex_space_mball(Object *ob)
 	boundbox_set_from_min_max(bb, min, max);
 }
 
-float *make_orco_mball(Object *ob)
+float *make_orco_mball(Object *ob, ListBase *dispbase)
 {
 	BoundBox *bb;
 	DispList *dl;
@@ -243,7 +243,7 @@ float *make_orco_mball(Object *ob)
 	loc[2]= (bb->vec[0][2]+bb->vec[1][2])/2.0f;
 	size[2]= bb->vec[1][2]-loc[2];
 
-	dl= ob->disp.first;
+	dl= dispbase->first;
 	orcodata= MEM_mallocN(sizeof(float)*3*dl->nr, "MballOrco");
 
 	data= dl->verts;
@@ -2088,7 +2088,7 @@ void init_metaball_octal_tree(int depth)
 	subdivide_metaball_octal_node(node, size[0], size[1], size[2], metaball_tree->depth);
 }
 
-void metaball_polygonize(Scene *scene, Object *ob)
+void metaball_polygonize(Scene *scene, Object *ob, ListBase *dispbase)
 {
 	PROCESS mbproc;
 	MetaBall *mb;
@@ -2105,7 +2105,6 @@ void metaball_polygonize(Scene *scene, Object *ob)
 
 	object_scale_to_mat3(ob, smat);
 
-	freedisplist(&ob->disp);
 	curindex= totindex= 0;
 	indices= 0;
 	thresh= mb->thresh;
@@ -2174,9 +2173,8 @@ void metaball_polygonize(Scene *scene, Object *ob)
 	}
 
 	if(curindex) {
-	
 		dl= MEM_callocN(sizeof(DispList), "mbaldisp");
-		BLI_addtail(&ob->disp, dl);
+		BLI_addtail(dispbase, dl);
 		dl->type= DL_INDEX4;
 		dl->nr= mbproc.vertices.count;
 		dl->parts= curindex;

source/blender/render/intern/source/convertblender.c

@@ -851,25 +851,23 @@ static void autosmooth(Render *re, ObjectRen *obr, float mat[][4], int degr)
 static float *get_object_orco(Render *re, Object *ob)
 {
 	float *orco;
-	
+
 	if (!re->orco_hash)
 		re->orco_hash = BLI_ghash_new(BLI_ghashutil_ptrhash, BLI_ghashutil_ptrcmp, "get_object_orco gh");
-	
+
 	orco = BLI_ghash_lookup(re->orco_hash, ob);
-	
+
 	if (!orco) {
 		if (ELEM(ob->type, OB_CURVE, OB_FONT)) {
 			orco = make_orco_curve(re->scene, ob);
 		} else if (ob->type==OB_SURF) {
 			orco = make_orco_surf(ob);
-		} else if (ob->type==OB_MBALL) {
-			orco = make_orco_mball(ob);
 		}
-		
+
 		if (orco)
 			BLI_ghash_insert(re->orco_hash, ob, orco);
 	}
-	
+
 	return orco;
 }
 
@@ -2369,6 +2367,7 @@ static void init_render_mball(Render *re, ObjectRen *obr)
 	Material *ma;
 	float *data, *nors, *orco, mat[4][4], imat[3][3], xn, yn, zn;
 	int a, need_orco, vlakindex, *index;
+	ListBase dispbase= {NULL, NULL};
 
 	if (ob!=find_basis_mball(re->scene, ob))
 		return;
@@ -2383,14 +2382,22 @@ static void init_render_mball(Render *re, ObjectRen *obr)
 	if(ma->texco & TEXCO_ORCO) {
 		need_orco= 1;
 	}
-	
-	makeDispListMBall(re->scene, ob);
-	dl= ob->disp.first;
+
+	makeDispListMBall_forRender(re->scene, ob, &dispbase);
+	dl= dispbase.first;
 	if(dl==0) return;
 
 	data= dl->verts;
 	nors= dl->nors;
-	orco= get_object_orco(re, ob);
+	if(need_orco) {
+		orco= get_object_orco(re, ob);
+
+		if (!orco) {
+			/* orco hasn't been found in cache - create new one and add to cache */
+			orco= make_orco_mball(ob, &dispbase);
+			set_object_orco(re, ob, orco);
+		}
+	}
 
 	for(a=0; a<dl->nr; a++, data+=3, nors+=3, orco+=3) {
 
@@ -2447,10 +2454,7 @@ static void init_render_mball(Render *re, ObjectRen *obr)
 	}
 
 	/* enforce display lists remade */
-	freedisplist(&ob->disp);
-	
-	/* this enforces remake for real, orco displist is small (in scale) */
-	ob->recalc |= OB_RECALC_DATA;
+	freedisplist(&dispbase);
 }
 
 /* ------------------------------------------------------------------------- */
@@ -4545,7 +4549,6 @@ static void init_render_object(Render *re, Object *ob, Object *par, DupliObject
 
 void RE_Database_Free(Render *re)
 {
-	Object *ob = NULL;
 	LampRen *lar;
 	
 	/* statistics for debugging render memory usage */
@@ -4572,21 +4575,8 @@ void RE_Database_Free(Render *re)
 	BLI_freelistN(&re->lights);
 
 	free_renderdata_tables(re);
-	
-	/* free orco. check all objects because of duplis and sets */
-	ob= G.main->object.first;
-	while(ob) {
-		if(ob->type==OB_MBALL) {
-			if(ob->disp.first && ob->disp.first!=ob->disp.last) {
-				DispList *dl= ob->disp.first;
-				BLI_remlink(&ob->disp, dl);
-				freedisplist(&ob->disp);
-				BLI_addtail(&ob->disp, dl);
-			}
-		}
-		ob= ob->id.next;
-	}
 
+	/* free orco */
 	free_mesh_orco_hash(re);
 #if 0	/* radio can be redone better */
 	end_radio_render();