- improved Simulator system

-> Manager handles all ticks -> advantage: Much easier to add new simulators, because you only have to register them in the manager

- moved sand and gravel simulation to a Simulator-class (cSandSimulator)

- Made Squid a little bit more funny and realistic, because it dies now when it´s not in water

-Escaping mobs run now faster than normal (They just walked away before :D)

git-svn-id: http://mc-server.googlecode.com/svn/trunk@125 0a769ca7-a7f5-676a-18bf-c427514a06d6

source/cSandSimulator.cpp

@@ -0,0 +1,74 @@
+#include "cSandSimulator.h"
+#include "cWorld.h"
+#include "Vector3i.h"
+#include "BlockID.h"
+#include "Defines.h"
+#include <vector>
+
+cSandSimulator::cSandSimulator( cWorld* a_World )
+	: cSimulator(a_World)
+	, m_Blocks(new std::vector <Vector3i *>)
+	, m_Buffer(new std::vector <Vector3i *>)
+{
+
+}
+
+cSandSimulator::~cSandSimulator()
+{
+	delete m_Buffer;
+	delete m_Blocks;
+}
+
+void cSandSimulator::Simulate( float a_Dt )
+{
+	m_Buffer->clear();
+	std::swap( m_Blocks, m_Buffer );
+
+	for( std::vector<Vector3i *>::iterator itr = m_Buffer->begin(); itr != m_Buffer->end(); ++itr )
+	{
+		Vector3i *Pos = *itr;
+		char BlockID = m_World->GetBlock(Pos->x, Pos->y, Pos->z);
+		if(!IsAllowedBlock(BlockID))
+			continue;
+
+		char BottomBlock = m_World->GetBlock( Pos->x, Pos->y - 1, Pos->z );
+		
+		if( IsPassable(BottomBlock) )
+		{
+			m_World->SetBlock( Pos->x, Pos->y, Pos->z, E_BLOCK_AIR, 0 );
+			m_World->SetBlock( Pos->x, Pos->y - 1, Pos->z, BlockID, 0 );
+		}
+	}
+		
+}
+
+
+bool cSandSimulator::IsAllowedBlock( char a_BlockID )
+{
+	return a_BlockID == E_BLOCK_SAND
+		|| a_BlockID == E_BLOCK_GRAVEL;
+}
+
+void cSandSimulator::AddBlock(int a_X, int a_Y, int a_Z)
+{
+	Vector3i *Block = new Vector3i(a_X, a_Y, a_Z);
+	
+	//check for duplicates
+	for( std::vector<Vector3i *>::iterator itr = m_Blocks->begin(); itr != m_Blocks->end(); ++itr )
+	{
+		Vector3i *Pos = *itr;
+		if( Pos->x == a_X && Pos->y == a_Y && Pos->z == a_Z )
+			return;
+	}
+
+	m_Blocks->push_back(Block);
+
+}
+
+bool cSandSimulator::IsPassable( char a_BlockID )
+{
+	return a_BlockID == E_BLOCK_AIR
+		|| IsBlockWater(a_BlockID)
+		|| IsBlockLava(a_BlockID);
+
+}