From 4e249fb3fbf75f0359758760d88e22aa5b14533c Mon Sep 17 00:00:00 2001
From: Perttu Ahola <celeron55@gmail.com>
Date: Sat, 27 Nov 2010 01:02:21 +0200
Subject: Initial files

---
 src/environment.cpp | 206 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 206 insertions(+)
 create mode 100644 src/environment.cpp

(limited to 'src/environment.cpp')

diff --git a/src/environment.cpp b/src/environment.cpp
new file mode 100644
index 000000000..412bb33e8
--- /dev/null
+++ b/src/environment.cpp
@@ -0,0 +1,206 @@
+#include "environment.h"
+#include "main.h" // g_device for timing debug
+
+Environment::Environment(Map *map, std::ostream &dout):
+		m_dout(dout)
+{
+	m_map = map;
+}
+
+Environment::~Environment()
+{
+	// Deallocate players
+	for(core::list<Player*>::Iterator i = m_players.begin();
+			i != m_players.end(); i++)
+	{
+		delete (*i);
+	}
+	
+	delete m_map;
+}
+
+void Environment::step(float dtime)
+{
+	DSTACK(__FUNCTION_NAME);
+	/*
+		Run Map's timers
+	*/
+	//TimeTaker maptimerupdatetimer("m_map->timerUpdate()", g_device);
+	// 0ms
+	m_map->timerUpdate(dtime);
+	//maptimerupdatetimer.stop();
+
+	/*
+		Get the highest speed some player is going
+	*/
+	//TimeTaker playerspeed("playerspeed", g_device);
+	// 0ms
+	f32 maximum_player_speed = 0.001; // just some small value
+	for(core::list<Player*>::Iterator i = m_players.begin();
+			i != m_players.end(); i++)
+	{
+		f32 speed = (*i)->getSpeed().getLength();
+		if(speed > maximum_player_speed)
+			maximum_player_speed = speed;
+	}
+	//playerspeed.stop();
+	
+	// Maximum time increment (for collision detection etc)
+	// Allow 0.1 blocks per increment
+	// time = distance / speed
+	f32 dtime_max_increment = 0.1*BS / maximum_player_speed;
+	// Maximum time increment is 10ms or lower
+	if(dtime_max_increment > 0.01)
+		dtime_max_increment = 0.01;
+	
+	//TimeTaker playerupdate("playerupdate", g_device);
+	
+	/*
+		Stuff that has a maximum time increment
+	*/
+	// Don't allow overly huge dtime
+	if(dtime > 0.5)
+		dtime = 0.5;
+
+	u32 loopcount = 0;
+	do
+	{
+		loopcount++;
+
+		f32 dtime_part;
+		if(dtime > dtime_max_increment)
+			dtime_part = dtime_max_increment;
+		else
+			dtime_part = dtime;
+		dtime -= dtime_part;
+		
+		/*
+			Handle players
+		*/
+		for(core::list<Player*>::Iterator i = m_players.begin();
+				i != m_players.end(); i++)
+		{
+			Player *player = *i;
+			
+			// Apply gravity to local player
+			if(player->isLocal())
+			{
+				v3f speed = player->getSpeed();
+				speed.Y -= 9.81 * BS * dtime_part * 2;
+				player->setSpeed(speed);
+			}
+
+			/*
+				Move the player.
+				For local player, this also calculates collision detection.
+			*/
+			player->move(dtime_part, *m_map);
+			
+			/*
+				Add footsteps to grass
+			*/
+			//TimeTaker footsteptimer("footstep", g_device);
+			// 0ms
+			v3f playerpos = player->getPosition();
+			// Get node that is at BS/4 under player
+			v3s16 bottompos = floatToInt(playerpos + v3f(0,-BS/4,0));
+			try{
+				MapNode n = m_map->getNode(bottompos);
+				if(n.d == MATERIAL_GRASS)
+				{
+					n.d = MATERIAL_GRASS_FOOTSTEPS;
+					m_map->setNode(bottompos, n);
+
+					// Update mesh on client
+					if(m_map->mapType() == MAPTYPE_CLIENT)
+					{
+						v3s16 p_blocks = getNodeBlockPos(bottompos);
+						MapBlock *b = m_map->getBlockNoCreate(p_blocks);
+						b->updateMesh();
+					}
+				}
+			}
+			catch(InvalidPositionException &e)
+			{
+			}
+			//footsteptimer.stop();
+		}
+	}
+	while(dtime > 0.001);
+	
+	//std::cout<<"Looped "<<loopcount<<" times."<<std::endl;
+}
+
+Map & Environment::getMap()
+{
+	return *m_map;
+}
+
+void Environment::addPlayer(Player *player)
+{
+	DSTACK(__FUNCTION_NAME);
+	//Check that only one local player exists and peer_ids are unique
+	assert(player->isLocal() == false || getLocalPlayer() == NULL);
+	assert(getPlayer(player->peer_id) == NULL);
+	m_players.push_back(player);
+}
+
+void Environment::removePlayer(u16 peer_id)
+{
+	DSTACK(__FUNCTION_NAME);
+re_search:
+	for(core::list<Player*>::Iterator i = m_players.begin();
+			i != m_players.end(); i++)
+	{
+		Player *player = *i;
+		if(player->peer_id != peer_id)
+			continue;
+		
+		delete player;
+		m_players.erase(i);
+		// See if there is an another one
+		// (shouldn't be, but just to be sure)
+		goto re_search;
+	}
+}
+
+LocalPlayer * Environment::getLocalPlayer()
+{
+	for(core::list<Player*>::Iterator i = m_players.begin();
+			i != m_players.end(); i++)
+	{
+		Player *player = *i;
+		if(player->isLocal())
+			return (LocalPlayer*)player;
+	}
+	return NULL;
+}
+
+Player * Environment::getPlayer(u16 peer_id)
+{
+	for(core::list<Player*>::Iterator i = m_players.begin();
+			i != m_players.end(); i++)
+	{
+		Player *player = *i;
+		if(player->peer_id == peer_id)
+			return player;
+	}
+	return NULL;
+}
+
+core::list<Player*> Environment::getPlayers()
+{
+	return m_players;
+}
+
+void Environment::printPlayers(std::ostream &o)
+{
+	o<<"Players in environment:"<<std::endl;
+	for(core::list<Player*>::Iterator i = m_players.begin();
+			i != m_players.end(); i++)
+	{
+		Player *player = *i;
+		o<<"Player peer_id="<<player->peer_id<<std::endl;
+	}
+}
+
-- 
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