godot/servers/physics_2d/step_2d_sw.h
PouleyKetchoupp 448c41a3e4 Godot Physics collisions and solver processed on threads
Use ThreadWorkPool to process physics step tasks in multiple threads. Collisions are all processed in parallel and solving impulses is
processed in parallel for rigid body islands.

Additional changes:
- Proper islands for soft bodies linked to active bodies
- All moving areas are on separate islands (can be parallelized)
- Fix inconsistencies with body islands (Kinematic bodies could link
bodies together or not depending on the processing order)
- Completely prevent static bodies to be active (it could cause islands
to be wrongly created and cause dangerous multi-threading operations as
well as inconsistencies in created islands)
- Apply impulses only on dynamic bodies to avoid unsafe multi-threaded
operations (static bodies can be on multiple islands)
- Removed inverted iterations when populating body islands, it's now
faster in regular order (maybe after fixing inconsistencies)
2021-04-26 18:26:00 -07:00

64 lines
3.1 KiB
C++

/*************************************************************************/
/* step_2d_sw.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
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/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
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#ifndef STEP_2D_SW_H
#define STEP_2D_SW_H
#include "space_2d_sw.h"
#include "core/templates/local_vector.h"
#include "core/templates/thread_work_pool.h"
class Step2DSW {
uint64_t _step;
int iterations = 0;
real_t delta = 0.0;
ThreadWorkPool work_pool;
LocalVector<LocalVector<Body2DSW *>> body_islands;
LocalVector<LocalVector<Constraint2DSW *>> constraint_islands;
LocalVector<Constraint2DSW *> all_constraints;
void _populate_island(Body2DSW *p_body, LocalVector<Body2DSW *> &p_body_island, LocalVector<Constraint2DSW *> &p_constraint_island);
void _setup_contraint(uint32_t p_constraint_index, void *p_userdata = nullptr);
void _pre_solve_island(LocalVector<Constraint2DSW *> &p_constraint_island) const;
void _solve_island(uint32_t p_island_index, void *p_userdata = nullptr) const;
void _check_suspend(LocalVector<Body2DSW *> &p_body_island) const;
public:
void step(Space2DSW *p_space, real_t p_delta, int p_iterations);
Step2DSW();
~Step2DSW();
};
#endif // STEP_2D_SW_H