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vphysics/main.cpp

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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//
+//=============================================================================//
+#include "cbase.h"
+#include "interface.h"
+#include "vphysics/object_hash.h"
+#include "vphysics/collision_set.h"
+#include "tier1/tier1.h"
+#include "ivu_vhash.hxx"
+
+
+
+#if defined(_WIN32) && !defined(_X360)
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+#endif	// _WIN32 && !_X360
+
+#include "vphysics_interfaceV30.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include "tier0/memdbgon.h"
+
+static void ivu_string_print_function( const char *str )
+{
+	Msg("%s", str);
+}
+
+#if defined(_WIN32) && !defined(_XBOX)
+//HMODULE	gPhysicsDLLHandle;
+
+#pragma warning (disable:4100)
+
+BOOL WINAPI DllMain( HINSTANCE hinstDLL, DWORD fdwReason, LPVOID lpvReserved )
+{
+ 	if ( fdwReason == DLL_PROCESS_ATTACH )
+	{
+		ivp_set_message_print_function( ivu_string_print_function );
+
+		MathLib_Init( 2.2f, 2.2f, 0.0f, 2.0f, false, false, false, false );
+		// store out module handle
+		//gPhysicsDLLHandle = (HMODULE)hinstDLL;
+	}
+	else if ( fdwReason == DLL_PROCESS_DETACH )
+	{
+	}
+	return TRUE;
+}
+
+#endif		// _WIN32
+
+#ifdef POSIX
+void __attribute__ ((constructor)) vphysics_init(void);
+void vphysics_init(void)
+{
+	ivp_set_message_print_function( ivu_string_print_function );
+
+	MathLib_Init( 2.2f, 2.2f, 0.0f, 2.0f, false, false, false, false );
+}
+#endif
+
+
+// simple 32x32 bit array
+class CPhysicsCollisionSet : public IPhysicsCollisionSet
+{
+public:
+	~CPhysicsCollisionSet() {}
+	CPhysicsCollisionSet()
+	{
+		memset( m_bits, 0, sizeof(m_bits) );
+	}
+	void EnableCollisions( int index0, int index1 )
+	{
+		Assert(index0<32&&index1<32);
+		m_bits[index0] |= 1<<index1;
+		m_bits[index1] |= 1<<index0;
+	}
+	void DisableCollisions( int index0, int index1 )
+	{
+		Assert(index0<32&&index1<32);
+		m_bits[index0] &= ~(1<<index1);
+		m_bits[index1] &= ~(1<<index0);
+	}
+
+	bool ShouldCollide( int index0, int index1 )
+	{
+		Assert(index0<32&&index1<32);
+		return (m_bits[index0] & (1<<index1)) ? true : false;
+	}
+private:
+	unsigned int m_bits[32];
+};
+
+
+//-----------------------------------------------------------------------------
+// Main physics interface
+//-----------------------------------------------------------------------------
+class CPhysicsInterface : public CTier1AppSystem<IPhysics>
+{
+public:
+	CPhysicsInterface() : m_pCollisionSetHash(NULL) {}
+	virtual void *QueryInterface( const char *pInterfaceName );
+	virtual	IPhysicsEnvironment *CreateEnvironment( void );
+	virtual void DestroyEnvironment( IPhysicsEnvironment *pEnvironment );
+	virtual IPhysicsEnvironment *GetActiveEnvironmentByIndex( int index );
+	virtual IPhysicsObjectPairHash *CreateObjectPairHash();
+	virtual void DestroyObjectPairHash( IPhysicsObjectPairHash *pHash );
+	virtual IPhysicsCollisionSet *FindOrCreateCollisionSet( unsigned int id, int maxElementCount );
+	virtual IPhysicsCollisionSet *FindCollisionSet( unsigned int id );
+	virtual void DestroyAllCollisionSets();
+
+private:
+	CUtlVector<IPhysicsEnvironment *>	m_envList;
+	CUtlVector<CPhysicsCollisionSet>	m_collisionSets;
+	IVP_VHash_Store						*m_pCollisionSetHash;
+};
+
+
+//-----------------------------------------------------------------------------
+// Expose singleton
+//-----------------------------------------------------------------------------
+static CPhysicsInterface g_MainDLLInterface;
+IPhysics *g_PhysicsInternal = &g_MainDLLInterface;
+EXPOSE_SINGLE_INTERFACE_GLOBALVAR( CPhysicsInterface, IPhysics, VPHYSICS_INTERFACE_VERSION, g_MainDLLInterface );
+
+
+//-----------------------------------------------------------------------------
+// Query interface
+//-----------------------------------------------------------------------------
+void *CPhysicsInterface::QueryInterface( const char *pInterfaceName )
+{
+	// Loading the datacache DLL mounts *all* interfaces
+	// This includes the backward-compatible interfaces + other vphysics interfaces
+	CreateInterfaceFn factory = Sys_GetFactoryThis();	// This silly construction is necessary
+	return factory( pInterfaceName, NULL );				// to prevent the LTCG compiler from crashing.
+}
+
+
+//-----------------------------------------------------------------------------
+// Implementation of IPhysics
+//-----------------------------------------------------------------------------
+IPhysicsEnvironment *CPhysicsInterface::CreateEnvironment( void )
+{
+	IPhysicsEnvironment *pEnvironment = CreatePhysicsEnvironment();
+	m_envList.AddToTail( pEnvironment );
+	return pEnvironment;
+}
+
+void CPhysicsInterface::DestroyEnvironment( IPhysicsEnvironment *pEnvironment )
+{
+	m_envList.FindAndRemove( pEnvironment );
+	delete pEnvironment;
+}
+
+IPhysicsEnvironment	*CPhysicsInterface::GetActiveEnvironmentByIndex( int index )
+{
+	if ( index < 0 || index >= m_envList.Count() )
+		return NULL;
+
+	return m_envList[index];
+}
+
+IPhysicsObjectPairHash *CPhysicsInterface::CreateObjectPairHash()
+{
+	return ::CreateObjectPairHash();
+}
+
+void CPhysicsInterface::DestroyObjectPairHash( IPhysicsObjectPairHash *pHash )
+{
+	delete pHash;
+}
+// holds a cache of these by id.
+// NOTE: This is stuffed into vphysics.dll as a sneaky way of sharing the memory between
+// client and server in single player.  So you can't have different client/server rules.
+IPhysicsCollisionSet *CPhysicsInterface::FindOrCreateCollisionSet( unsigned int id, int maxElementCount )
+{
+	if ( !m_pCollisionSetHash )
+	{
+		m_pCollisionSetHash = new IVP_VHash_Store(256);
+	}
+	Assert( id != 0 );
+	Assert( maxElementCount <= 32 );
+	if ( maxElementCount > 32 )
+		return NULL;
+
+	IPhysicsCollisionSet *pSet = FindCollisionSet( id );
+	if ( pSet )
+		return pSet;
+	int index = m_collisionSets.AddToTail();
+	m_pCollisionSetHash->add_elem( (void *)id, (void *)(index+1) );
+	return &m_collisionSets[index];
+}
+
+IPhysicsCollisionSet *CPhysicsInterface::FindCollisionSet( unsigned int id )
+{
+	if ( m_pCollisionSetHash )
+	{
+		int index = (int)m_pCollisionSetHash->find_elem( (void *)id );
+		if ( index > 0 )
+		{
+			Assert( index <= m_collisionSets.Count() );
+			if ( index <= m_collisionSets.Count() )
+			{
+				return &m_collisionSets[index-1];
+			}
+		}
+	}
+	return NULL;
+}
+
+void CPhysicsInterface::DestroyAllCollisionSets()
+{
+	m_collisionSets.Purge();
+	delete m_pCollisionSetHash;
+	m_pCollisionSetHash = NULL;
+}
+
+	
+
+// In release build, each of these libraries must contain a symbol that indicates it is also a release build
+// You MUST disable this in order to run a release vphysics.dll with a debug library.
+// This should not usually be necessary
+#if !defined(_DEBUG) && defined(_WIN32)
+extern int ivp_physics_lib_is_a_release_build;
+extern int ivp_compactbuilder_lib_is_a_release_build;
+extern int hk_base_lib_is_a_release_build;
+extern int hk_math_lib_is_a_release_build;
+extern int havana_constraints_lib_is_a_release_build;
+
+void DebugTestFunction()
+{
+	ivp_physics_lib_is_a_release_build = 0;
+	ivp_compactbuilder_lib_is_a_release_build = 0;
+	hk_base_lib_is_a_release_build = 0;
+	hk_math_lib_is_a_release_build = 0;
+	havana_constraints_lib_is_a_release_build = 0;
+}
+#endif
+