bc989497de
Graph traversal which is based on counting parents which are still
to be updated fails in cases there are cycles in the graph.
If there are cyclic dependencies in the scene all the objects from
the cycles will be updated in a single thread now one by one. This
makes blender behave the same way as it was before multi-threaded
DAG landed to master.
This needed to tweak depsgraph a bit so now dag_check_cycle() sets
is_acyclic field of DAG forest if there are cycles in the graph.
TODO: It might be possible to save some time on evaluation when
all the tagged objects were updated in multi-threaded DAG
traversal.
158 lines
4.9 KiB
C
158 lines
4.9 KiB
C
/*
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* ***** BEGIN GPL LICENSE BLOCK *****
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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* The Original Code is Copyright (C) 2004 Blender Foundation.
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* All rights reserved.
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*
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* Contributor(s): none yet.
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*
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* ***** END GPL LICENSE BLOCK *****
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*/
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/** \file blender/blenkernel/depsgraph_private.h
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* \ingroup bke
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*/
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#ifndef __DEPSGRAPH_PRIVATE_H__
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#define __DEPSGRAPH_PRIVATE_H__
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#include "BKE_depsgraph.h"
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#include "DNA_constraint_types.h"
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#include "BKE_constraint.h"
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/* **** DAG relation types *** */
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/* scene link to object */
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#define DAG_RL_SCENE (1 << 0)
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/* object link to data */
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#define DAG_RL_DATA (1 << 1)
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/* object changes object (parent, track, constraints) */
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#define DAG_RL_OB_OB (1 << 2)
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/* object changes obdata (hooks, constraints) */
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#define DAG_RL_OB_DATA (1 << 3)
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/* data changes object (vertex parent) */
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#define DAG_RL_DATA_OB (1 << 4)
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/* data changes data (deformers) */
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#define DAG_RL_DATA_DATA (1 << 5)
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#define DAG_NO_RELATION (1 << 6)
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#define DAG_RL_ALL_BUT_DATA (DAG_RL_SCENE | DAG_RL_OB_OB | DAG_RL_OB_DATA | DAG_RL_DATA_OB | DAG_RL_DATA_DATA)
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#define DAG_RL_ALL (DAG_RL_ALL_BUT_DATA | DAG_RL_DATA)
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#define DAGQUEUEALLOC 50
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enum {
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DAG_WHITE = 0,
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DAG_GRAY = 1,
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DAG_BLACK = 2
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};
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typedef struct DagAdjList {
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struct DagNode *node;
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short type;
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int count; /* number of identical arcs */
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unsigned int lay; // for flushing redraw/rebuild events
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const char *name;
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struct DagAdjList *next;
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} DagAdjList;
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typedef struct DagNode {
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int color;
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short type;
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float x, y, k;
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void *ob;
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void *first_ancestor;
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int ancestor_count;
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unsigned int lay; /* accumulated layers of its relations + itself */
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unsigned int scelay; /* layers due to being in scene */
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uint64_t customdata_mask; /* customdata mask */
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int lasttime; /* if lasttime != DagForest->time, this node was not evaluated yet for flushing */
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int BFS_dist; /* BFS distance */
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int DFS_dist; /* DFS distance */
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int DFS_dvtm; /* DFS discovery time */
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int DFS_fntm; /* DFS Finishing time */
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struct DagAdjList *child;
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struct DagAdjList *parent;
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struct DagNode *next;
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/* Threaded evaluation routines */
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uint32_t num_pending_parents; /* number of parents which are not updated yet
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* this node has got.
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* Used by threaded update for faster detect whether node could be
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* updated aready.
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*/
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bool scheduled;
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/* Runtime flags mainly used to determine which extra data is to be evaluated
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* during object_handle_update(). Such an extra data is what depends on the
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* DAG topology, meaning this flags indicates the data evaluation of which
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* depends on the node dependencies.
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*/
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short eval_flags;
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} DagNode;
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typedef struct DagNodeQueueElem {
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struct DagNode *node;
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struct DagNodeQueueElem *next;
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} DagNodeQueueElem;
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typedef struct DagNodeQueue {
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DagNodeQueueElem *first;
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DagNodeQueueElem *last;
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int count;
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int maxlevel;
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struct DagNodeQueue *freenodes;
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} DagNodeQueue;
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// forest as we may have more than one DAG unnconected
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typedef struct DagForest {
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ListBase DagNode;
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struct GHash *nodeHash;
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int numNodes;
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bool is_acyclic;
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int time; /* for flushing/tagging, compare with node->lasttime */
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} DagForest;
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// queue operations
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DagNodeQueue *queue_create(int slots);
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void queue_raz(DagNodeQueue *queue);
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void push_queue(DagNodeQueue *queue, DagNode *node);
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void push_stack(DagNodeQueue *queue, DagNode *node);
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DagNode *pop_queue(DagNodeQueue *queue);
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DagNode *get_top_node_queue(DagNodeQueue *queue);
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void queue_delete(DagNodeQueue *queue);
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// Dag management
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DagForest *dag_init(void);
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DagForest *build_dag(struct Main *bmain, struct Scene *sce, short mask);
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void free_forest(struct DagForest *Dag);
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DagNode *dag_find_node(DagForest *forest, void *fob);
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DagNode *dag_add_node(DagForest *forest, void *fob);
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DagNode *dag_get_node(DagForest *forest, void *fob);
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DagNode *dag_get_sub_node(DagForest *forest, void *fob);
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void dag_add_relation(DagForest *forest, DagNode *fob1, DagNode *fob2, short rel, const char *name);
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void graph_print_queue(DagNodeQueue *nqueue);
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void graph_print_queue_dist(DagNodeQueue *nqueue);
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void graph_print_adj_list(DagForest *dag);
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#endif /* __DEPSGRAPH_PRIVATE_H__ */
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