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include/engine/physic/physic_world.h

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+/* -----------------------------------------------------------------------------
+	GSFramework
+	Copyright 2001-2013 Emmanuel Julien. All Rights Reserved.
+----------------------------------------------------------------------------- */
+
+
+#ifndef	__NPHYSICWORLD__
+#define	__NPHYSICWORLD__
+
+
+		#include "physic/physic_world_interface.h"
+		#include "physic/physic_message.h"
+		#include "math/vector.h"
+		#include "timing/benchmark.h"
+		#include "container/nlist.h"
+		#include "nstring/nstring.h"
+
+
+namespace GS {
+
+	namespace Core { class Camera; }
+
+	namespace Render {
+		class Renderer;
+		class RasterFont;
+	}
+	namespace S3D {
+		class PhysicItem;
+		class PhysicConstraint;
+		struct PhysicShape;
+
+		using Core::Camera;
+		using Render::Renderer;
+		using Render::RasterFont;
+
+/// Raytrace hit result structure.
+struct	PhysicTrace
+{
+		Vector4			n, p;		///< Intersection normal and point in world space.
+		String			m;			///< Material name at intersection point.
+		PhysicShape		*s;
+		PhysicItem		*i;
+
+		PhysicTrace() : m(0), s(0), i(0) {}
+};
+
+/// Collision pair.
+struct	CollisionPair
+{
+		PhysicItem		*a, *b;
+		uint			contact_count;
+		Vector4			contact[4], normal[4];
+
+		CollisionPair() : a(0), b(0), contact_count(0) {}
+};
+
+/*
+	@short	Abstract physic world.
+	@author	Emmanuel Julien (ejulien@gsworks.fr)
+*/
+class	PhysicWorld
+{
+protected:
+
+		float			timestep,
+						substep_dt;
+		Vector4			gravity;
+
+		IPhysicWorld	*world_interface;
+
+public:
+
+		Benchmark	bench_step;
+
+virtual	PhysicItem		*NewItem() = 0;
+virtual	PhysicConstraint *NewConstraint() = 0;
+
+		/// Clear convex/mesh cache.
+virtual	void			ClearConvexMeshCache() = 0;
+
+virtual	bool			HasDebugger() const { return false; }
+virtual	void			CreateDebugger(Renderer * = 0) {}
+
+		/// Draw debug informations (native library display).
+virtual	void			DrawDebug(Renderer &, Camera *, RasterFont *, bool xray_first_pass) {}
+
+		void			SetWorldInterface(IPhysicWorld *i) { world_interface = i; }
+		IPhysicWorld	*GetWorldInterface() const { return world_interface; }
+
+		void			SetTimestep(float t = 1.f / 60.f) { timestep = t; }
+		float			GetTimestep() const { return timestep; }
+
+		void			SetGravity(const Vector4 &g) { gravity = g; }
+const	Vector4			&GetGravity() const { return gravity; }
+
+virtual	bool			Create() = 0;
+virtual	void			Delete() = 0;
+
+		/// Raytrace world.
+virtual	bool			Raytrace(const Vector4 &s, const Vector4 &d, PhysicTrace &hit, int collision_mask = ~0, int shape_mask = ~0, float max_distance = -1.f) = 0;
+
+		/// Return the number of collision pair in the previous step.
+virtual	uint			GetCollisionPairCount() = 0;
+		/// Return the number of collision pair in the previous step.
+virtual	bool			GetCollisionPair(uint n, CollisionPair &) = 0;
+
+virtual	void			Step(const Time &dt) = 0;
+
+/*!
+	@name	Low-level message broadcasting system.
+	@{
+*/
+protected:
+
+		/// Physics message listener.
+		List <nPhysicListener *> listener_list;
+
+public:
+
+		bool			RegisterMessageListener(nPhysicListener *listener) { return asbool(listener_list.Add(listener)); }
+		bool			UnregisterMessageListener(nPhysicListener *listener) { return listener_list.Remove(listener); }
+		void			BroadcastMessage(nPhysicMessage msg, void *parm = 0)
+		{
+			ListForeachPtr(nPhysicListener *, listener, listener_list)
+				listener->ProcessMessage(msg, parm);
+		}
+/// @}
+
+		PhysicWorld();
+virtual	~PhysicWorld() {}
+};
+
+	} // S3D
+} // GS
+
+
+#endif	// __NPHYSICWORLD__