Add PhysWorld2D::UseSpatialHash

ChangeLog.md

@@ -64,6 +64,7 @@ Nazara Engine:
 - ⚠️ LuaInstance no longer load all lua libraries on construction, this is done in the new LoadLibraries method which allows you to excludes some libraries
 - Clock::Restart now returns the elapsed microseconds since construction or last Restart call
 - Add PhysWorld2D::[Get|Set]IterationCount to control how many iterations chipmunk will perform per step.
+- Add PhysWorld2D::UseSpatialHash to use spatial hashing instead of bounding box trees, which may speedup simulation in some cases.
 
 Nazara Development Kit:
 - Added ImageWidget (#139)

include/Nazara/Physics2D/PhysWorld2D.hpp

@@ -75,6 +75,8 @@ namespace Nz
 
 			void Step(float timestep);
 
+			void UseSpatialHash(float cellSize, std::size_t entityCount);
+
 			PhysWorld2D& operator=(const PhysWorld2D&) = delete;
 			PhysWorld2D& operator=(PhysWorld2D&&) = delete; ///TODO
 

src/Nazara/Physics2D/PhysWorld2D.cpp

@@ -322,6 +322,11 @@ namespace Nz
 		}
 	}
 
+	void PhysWorld2D::UseSpatialHash(float cellSize, std::size_t entityCount)
+	{
+		cpSpaceUseSpatialHash(m_handle, cpFloat(cellSize), int(entityCount));
+	}
+
 	void PhysWorld2D::InitCallbacks(cpCollisionHandler* handler, const Callback& callbacks)
 	{
 		auto it = m_callbacks.emplace(handler, std::make_unique<Callback>(callbacks)).first;