path: root/src/engine/client/client.cpp

#include <baselib/system.h>
#include <baselib/config.h>
#include <baselib/input.h>
#include <baselib/audio.h>
#include <baselib/stream/file.h>

#include <string.h>
#include <stdarg.h>
#include <stdlib.h>
#include <stdio.h>
#include <math.h>
#include <engine/interface.h>

#include <engine/packet.h>
#include <engine/snapshot.h>
#include "ui.h"

#include <engine/compression.h>
#include <engine/network.h>
#include <engine/versions.h>
#include <engine/config.h>

#include <mastersrv/mastersrv.h>

using namespace baselib;

static int info_request_begin;
static int info_request_end;
static int snapshot_part;
static int64 local_start_time;
static int64 game_start_time;
static float latency = 0;
static int extra_polating = 0;
static int debug_font;
static float frametime = 0.0001f;
static net_client net;
static netaddr4 master_server;
static netaddr4 server_address;
static int window_must_refocus = 0;
static int snaploss = 0;

static int current_tick = 0;
static float intratick = 0;


// --- input wrappers ---
static int keyboard_state[2][input::last];
static int keyboard_current = 0;
static int keyboard_first = 1;

void inp_mouse_relative(int *x, int *y) { input::mouse_position(x, y); }
int inp_mouse_scroll() { return input::mouse_scroll(); }
int inp_key_pressed(int key) { return keyboard_state[keyboard_current][key]; }
int inp_key_was_pressed(int key) { return keyboard_state[keyboard_current^1][key]; }
int inp_key_down(int key) { return inp_key_pressed(key)&&!inp_key_was_pressed(key); }
int inp_button_pressed(int button) { return input::pressed(button); }

void inp_update()
{
	if(keyboard_first)
	{
		// make sure to reset
		keyboard_first = 0;
		inp_update();
	}
	
	keyboard_current = keyboard_current^1;
	for(int i = 0; i < input::last; i++)
		keyboard_state[keyboard_current][i] = input::pressed(i);
}

// --- input snapping ---
static int input_data[MAX_INPUT_SIZE] = {0};
static int input_data_size;
static int input_is_changed = 1;
void snap_input(void *data, int size)
{
	if(input_data_size != size || memcmp(input_data, data, size))
		input_is_changed = 1;
	mem_copy(input_data, data, size);
	input_data_size = size;
}

// -- snapshot handling ---
enum
{
	NUM_SNAPSHOT_TYPES=2,
};

struct snapshot_info
{
	snapshot_info *prev;
	snapshot_info *next;
	
	int tick;
	int64 recvtime;
	snapshot *snap;
};

static snapshot_info *first_snapshot = 0;
static snapshot_info *last_snapshot = 0;

static snapshot_info *client_snapshot_add(int tick, int64 time, void *data, int data_size)
{
	snapshot_info *holder = (snapshot_info*)mem_alloc(sizeof(snapshot_info) + data_size, 1);
	holder->tick = tick;
	holder->recvtime = time;
	holder->snap = (snapshot *)(holder+1);
	mem_copy(holder->snap, data, data_size);
	
	holder->next =0x0;
	holder->prev = last_snapshot;
	if(last_snapshot)
		last_snapshot->next = holder;
	else
		first_snapshot = holder;
	last_snapshot = holder;
	
	return holder;
}

static snapshot_info *client_snapshot_find(int tick)
{
	snapshot_info *current = first_snapshot;
	while(current)
	{
		if(current->tick == tick)
			return current;
		current = current->next;
	}
	
	return 0;
}

static void client_snapshot_purge_until(int tick)
{
	snapshot_info *current = first_snapshot;
	while(current)
	{
		snapshot_info *next = current->next;
		if(current->tick < tick)
			mem_free(current);
		else
			break;
		
		current = next;
		current->prev = 0;
		first_snapshot = current;
	}
	
	if(!first_snapshot)
		last_snapshot = 0;
}

static snapshot_info *snapshots[NUM_SNAPSHOT_TYPES];
static int recived_snapshots;
static char snapshot_incomming_data[MAX_SNAPSHOT_SIZE];

// ---

const void *snap_get_item(int snapid, int index, snap_item *item)
{
	dbg_assert(snapid >= 0 && snapid < NUM_SNAPSHOT_TYPES, "invalid snapid");
	snapshot::item *i = snapshots[snapid]->snap->get_item(index);
	item->type = i->type();
	item->id = i->id();
	return (void *)i->data();
}

const void *snap_find_item(int snapid, int type, int id)
{
	// TODO: linear search. should be fixed.
	for(int i = 0; i < snapshots[snapid]->snap->num_items; i++)
	{
		snapshot::item *itm = snapshots[snapid]->snap->get_item(i);
		if(itm->type() == type && itm->id() == id)
			return (void *)itm->data();
	}
	return 0x0;
}

int snap_num_items(int snapid)
{
	dbg_assert(snapid >= 0 && snapid < NUM_SNAPSHOT_TYPES, "invalid snapid");
	return snapshots[snapid]->snap->num_items;
}

static void snap_init()
{
	snapshots[SNAP_CURRENT] = 0;
	snapshots[SNAP_PREV] = 0;
	recived_snapshots = 0;
	game_start_time = -1;
	
}

// ------ time functions ------
float client_intratick()
{
	return intratick;
}

int client_tick()
{
	return current_tick;
}

int client_tickspeed()
{
	return SERVER_TICK_SPEED;
}

float client_frametime()
{
	return frametime;
}

float client_localtime()
{
	return (time_get()-local_start_time)/(float)(time_freq());
}

int menu_loop(); // TODO: what is this?

// ----- send functions -----
int client_send_msg()
{
	const msg_info *info = msg_get_info();
	NETPACKET packet;
	mem_zero(&packet, sizeof(NETPACKET));
	
	packet.client_id = 0;
	packet.data = info->data;
	packet.data_size = info->size;

	if(info->flags&MSGFLAG_VITAL)	
		packet.flags = PACKETFLAG_VITAL;
	
	net.send(&packet);
	return 0;
}

static void client_send_info()
{
	recived_snapshots = 0;
	game_start_time = -1;

	msg_pack_start_system(NETMSG_INFO, MSGFLAG_VITAL);
	msg_pack_string(TEEWARS_NETVERSION_STRING, 64);
	msg_pack_string(config.player_name, 128);
	msg_pack_string(config.clan_name, 128);
	msg_pack_string(config.password, 128);
	msg_pack_string("myskin", 128);
	msg_pack_end();
	client_send_msg();
}

static void client_send_entergame()
{
	msg_pack_start_system(NETMSG_ENTERGAME, MSGFLAG_VITAL);
	msg_pack_end();
	client_send_msg();
}

static void client_send_error(const char *error)
{
	/*
		pack(NETMSG_CLIENT_ERROR, "s", error);
	*/
	/*
	packet p(NETMSG_CLIENT_ERROR);
	p.write_str(error);
	send_packet(&p);
	//send_packet(&p);
	//send_packet(&p);
	*/
}	

static void client_send_input()
{
	msg_pack_start_system(NETMSG_INPUT, 0);
	msg_pack_int(input_data_size);
	for(int i = 0; i < input_data_size/4; i++)
		msg_pack_int(input_data[i]);
	msg_pack_end();
	client_send_msg();
}


// ------ server browse ----
static struct 
{
	server_info infos[MAX_SERVERS];
	int64 request_times[MAX_SERVERS];
	netaddr4 addresses[MAX_SERVERS];
	int num;
} servers;
static int serverlist_lan = 1;

int client_serverbrowse_getlist(server_info **serverlist)
{
	*serverlist = servers.infos;
	return servers.num;
}

static void client_serverbrowse_init()
{
	servers.num = 0;
}

void client_serverbrowse_refresh(int lan)
{
	serverlist_lan = lan;
	
	if(serverlist_lan)
	{
		if(config.debug)
			dbg_msg("client", "broadcasting for servers");
		NETPACKET packet;
		packet.client_id = -1;
		mem_zero(&packet, sizeof(packet));
		packet.address.ip[0] = 0;
		packet.address.ip[1] = 0;
		packet.address.ip[2] = 0;
		packet.address.ip[3] = 0;
		packet.address.port = 8303;
		packet.flags = PACKETFLAG_CONNLESS;
		packet.data_size = sizeof(SERVERBROWSE_GETINFO);
		packet.data = SERVERBROWSE_GETINFO;
		net.send(&packet);	
		
		// reset the list
		servers.num = 0;		
	}
	else
	{
		if(config.debug)
			dbg_msg("client", "requesting server list");
		NETPACKET packet;
		mem_zero(&packet, sizeof(packet));
		packet.client_id = -1;
		packet.address = master_server;
		packet.flags = PACKETFLAG_CONNLESS;
		packet.data_size = sizeof(SERVERBROWSE_GETLIST);
		packet.data = SERVERBROWSE_GETLIST;
		net.send(&packet);	
		
		// reset the list
		servers.num = 0;
	}
}


static void client_serverbrowse_request(int id)
{
	if(config.debug)
	{
		dbg_msg("client", "requesting server info from %d.%d.%d.%d:%d",
			servers.addresses[id].ip[0], servers.addresses[id].ip[1], servers.addresses[id].ip[2],
			servers.addresses[id].ip[3], servers.addresses[id].port);
	}
	NETPACKET packet;
	packet.client_id = -1;
	packet.address = servers.addresses[id];
	packet.flags = PACKETFLAG_CONNLESS;
	packet.data_size = sizeof(SERVERBROWSE_GETINFO);
	packet.data = SERVERBROWSE_GETINFO;
	net.send(&packet);
	servers.request_times[id] = time_get();
}

static void client_serverbrowse_update()
{
	int64 timeout = time_freq();
	int64 now = time_get();
	int max_requests = 10;
	
	// timeout old requests
	while(info_request_begin < servers.num && info_request_begin < info_request_end)
	{
		if(now > servers.request_times[info_request_begin]+timeout)
			info_request_begin++;
		else
			break;
	}
	
	// send new requests
	while(info_request_end < servers.num && info_request_end-info_request_begin < max_requests)
	{
		client_serverbrowse_request(info_request_end);
		info_request_end++;
	}
}

// ------ state handling -----
static int state;
int client_state() { return state; }
static void client_set_state(int s)
{
	if(config.debug)
		dbg_msg("client", "state change. last=%d current=%d", state, s);
	int old = state;
	state = s;
	if(old != s)
		modc_statechange(state, old);
}


void client_connect(const char *server_address_str)
{
	dbg_msg("client", "connecting to '%s'", server_address_str);
	char buf[512];
	strncpy(buf, server_address_str, 512);
	
	const char *port_str = 0;
	for(int k = 0; buf[k]; k++)
	{
		if(buf[k] == ':')
		{
			port_str = &(buf[k+1]);
			buf[k] = 0;
			break;
		}
	}
	
	int port = 8303;
	if(port_str)
		port = atoi(port_str);
		
	if(net_host_lookup(buf, port, &server_address) != 0)
		dbg_msg("client", "could not find the address of %s, connecting to localhost", buf);
	
	net.connect(&server_address);
	client_set_state(CLIENTSTATE_CONNECTING);	
	current_tick = 0;
}

void client_disconnect()
{
	client_send_error("disconnected");
	net.disconnect("disconnected");
	client_set_state(CLIENTSTATE_OFFLINE);
	map_unload();
}

static bool client_load_data()
{
	debug_font = gfx_load_texture("data/debug_font.png");
	return true;
}

static void client_debug_render()
{
	if(!config.debug)
		return;
		
	gfx_blend_normal();
	gfx_texture_set(debug_font);
	gfx_mapscreen(0,0,gfx_screenwidth(),gfx_screenheight());
	
	static NETSTATS prev, current;
	static int64 last_snap = 0;
	if(time_get()-last_snap > time_freq()/10)
	{
		last_snap = time_get();
		prev = current;
		net.stats(&current);
	}
	
	static float frametime_avg = 0;
	frametime_avg = frametime_avg*0.9f + frametime*0.1f;
	char buffer[512];
	sprintf(buffer, "send: %6d recv: %6d snaploss: %4d latency: %4.0f %c gfxmem: %6dk fps: %3d",
		(current.send_bytes-prev.send_bytes)*10,
		(current.recv_bytes-prev.recv_bytes)*10,
		snaploss,
		latency*1000.0f, extra_polating?'E':' ',
		gfx_memory_usage()/1024,
		(int)(1.0f/frametime_avg));
	gfx_quads_text(2, 2, 16, buffer);
	
}

void client_quit()
{
	client_set_state(CLIENTSTATE_QUITING);
}

const char *client_error_string()
{
	return net.error_string();
}

static void client_render()
{
	gfx_clear(0.0f,0.0f,0.0f);
	modc_render();
	client_debug_render();
}

static void client_error(const char *msg)
{
	dbg_msg("client", "error: %s", msg);
	client_send_error(msg);
	client_set_state(CLIENTSTATE_QUITING);
}

static void client_process_packet(NETPACKET *packet)
{
	if(packet->client_id == -1)
	{
		// connectionlesss
		if(packet->data_size >= (int)sizeof(SERVERBROWSE_LIST) &&
			memcmp(packet->data, SERVERBROWSE_LIST, sizeof(SERVERBROWSE_LIST)) == 0)
		{
			// server listing
			int size = packet->data_size-sizeof(SERVERBROWSE_LIST);
			mem_copy(servers.addresses, (char*)packet->data+sizeof(SERVERBROWSE_LIST), size);
			servers.num = size/sizeof(NETADDR4);

			info_request_begin = 0;
			info_request_end = 0;

			for(int i = 0; i < servers.num; i++)
			{
				servers.infos[i].num_players = 0;
				servers.infos[i].max_players = 0;
				servers.infos[i].latency = 999;
#if defined(CONF_ARCH_ENDIAN_BIG)
				const char *tmp = (const char *)&servers.addresses[i].port;
				servers.addresses[i].port = (tmp[1]<<8) | tmp[0];
#endif
				sprintf(servers.infos[i].address, "%d.%d.%d.%d:%d",
					servers.addresses[i].ip[0], servers.addresses[i].ip[1], servers.addresses[i].ip[2],
					servers.addresses[i].ip[3], servers.addresses[i].port);
				sprintf(servers.infos[i].name, "%d.%d.%d.%d:%d",
					servers.addresses[i].ip[0], servers.addresses[i].ip[1], servers.addresses[i].ip[2],
					servers.addresses[i].ip[3], servers.addresses[i].port);
			}
		}

		if(packet->data_size >= (int)sizeof(SERVERBROWSE_INFO) &&
			memcmp(packet->data, SERVERBROWSE_INFO, sizeof(SERVERBROWSE_INFO)) == 0)
		{
			// we got ze info
			data_unpacker unpacker;
			unpacker.reset((unsigned char*)packet->data+sizeof(SERVERBROWSE_INFO), packet->data_size-sizeof(SERVERBROWSE_INFO));
			
			if(serverlist_lan)
			{
				if(servers.num != MAX_SERVERS)
				{
					int i = servers.num;
					strncpy(servers.infos[i].name, unpacker.get_string(), 128);
					strncpy(servers.infos[i].map, unpacker.get_string(), 128);
					servers.infos[i].max_players = unpacker.get_int();
					servers.infos[i].num_players = unpacker.get_int();
					servers.infos[i].latency = 0;
					
					sprintf(servers.infos[i].address, "%d.%d.%d.%d:%d",
						packet->address.ip[0], packet->address.ip[1], packet->address.ip[2],
						packet->address.ip[3], packet->address.port);

					if(config.debug)
						dbg_msg("client", "got server info");
					servers.num++;
					
				}
			}
			else
			{
				for(int i = 0; i < servers.num; i++)
				{
					if(net_addr4_cmp(&servers.addresses[i], &packet->address) == 0)
					{
						strncpy(servers.infos[i].name, unpacker.get_string(), 128);
						strncpy(servers.infos[i].map, unpacker.get_string(), 128);
						servers.infos[i].max_players = unpacker.get_int();
						servers.infos[i].num_players = unpacker.get_int();
						servers.infos[i].latency = ((time_get() - servers.request_times[i])*1000)/time_freq();
						if(config.debug)
							dbg_msg("client", "got server info");
						break;
					}
				}
			}
		}
	}
	else
	{
		
		int sys;
		int msg = msg_unpack_start(packet->data, packet->data_size, &sys);
		if(sys)
		{
			// system message
			if(msg == NETMSG_MAP)
			{
				const char *map = msg_unpack_string();
				dbg_msg("client/network", "connection accepted, map=%s", map);
				client_set_state(CLIENTSTATE_LOADING);
				
				if(map_load(map))
				{
					modc_entergame();
					client_send_entergame();
					dbg_msg("client/network", "loading done");
					// now we will wait for two snapshots
					// to finish the connection
				}
				else
				{
					client_error("failure to load map");
				}
			}
			else if(msg == NETMSG_SNAP || msg == NETMSG_SNAPEMPTY) //|| msg == NETMSG_SNAPSMALL || msg == NETMSG_SNAPEMPTY)
			{
				//dbg_msg("client/network", "got snapshot");
				int game_tick = msg_unpack_int();
				int delta_tick = game_tick-msg_unpack_int();
				int num_parts = 1;
				int part = 0;
				int part_size = 0;
				
				if(msg != NETMSG_SNAPEMPTY)
					part_size = msg_unpack_int();
				
				if(snapshot_part == part && game_tick > current_tick)
				{
					// TODO: clean this up abit
					const char *d = (const char *)msg_unpack_raw(part_size);
					mem_copy((char*)snapshot_incomming_data + part*MAX_SNAPSHOT_PACKSIZE, d, part_size);
					snapshot_part++;
				
					if(snapshot_part == num_parts)
					{
						snapshot_part = 0;
						
						// find snapshot that we should use as delta 
						static snapshot emptysnap;
						emptysnap.data_size = 0;
						emptysnap.num_items = 0;
						
						snapshot *deltashot = &emptysnap;
						
						// find delta
						if(delta_tick >= 0)
						{
							//void *delta_data;
							snapshot_info *delta_info = client_snapshot_find(delta_tick);
							//deltashot_size = snapshots_new.get(delta_tick, 0, &delta_data);
							if(delta_info)
								deltashot = delta_info->snap;
							else
							{
								// couldn't find the delta snapshots that the server used
								// to compress this snapshot. force the server to resync
								if(config.debug)
									dbg_msg("client", "error, couldn't find the delta snapshot");
								
								// ack snapshot
								msg_pack_start_system(NETMSG_SNAPACK, 0);
								msg_pack_int(-1);
								msg_pack_end();
								client_send_msg();
								return;
							}
						}

						// decompress snapshot
						void *deltadata = snapshot_empty_delta();
						int deltasize = sizeof(int)*3;

						unsigned char tmpbuffer[MAX_SNAPSHOT_SIZE];
						unsigned char tmpbuffer2[MAX_SNAPSHOT_SIZE];
						if(part_size)
						{
							int compsize = zerobit_decompress(snapshot_incomming_data, part_size, tmpbuffer);
							int intsize = intpack_decompress(tmpbuffer, compsize, tmpbuffer2);
							deltadata = tmpbuffer2;
							deltasize = intsize;
						}

						//dbg_msg("UNPACK", "%d unpacked with %d", game_tick, delta_tick);
						
						unsigned char tmpbuffer3[MAX_SNAPSHOT_SIZE];
						int snapsize = snapshot_unpack_delta(deltashot, (snapshot*)tmpbuffer3, deltadata, deltasize);

						// purge old snapshots				
						int purgetick = delta_tick;
						if(snapshots[SNAP_PREV] && snapshots[SNAP_PREV]->tick < purgetick)
							purgetick = snapshots[SNAP_PREV]->tick;
						if(snapshots[SNAP_CURRENT] && snapshots[SNAP_CURRENT]->tick < purgetick)
							purgetick = snapshots[SNAP_PREV]->tick;
						client_snapshot_purge_until(purgetick);
						//client_snapshot_purge_until(game_tick-50);
						
						// add new
						snapshot_info *snap = client_snapshot_add(game_tick, time_get(), tmpbuffer3, snapsize);
						
						//int ncrc = snapshot_crc((snapshot*)tmpbuffer3);
						//if(crc != ncrc)
						//	dbg_msg("client", "client snapshot crc failure %d %d", crc, ncrc);
						
						// apply snapshot, cycle pointers
						recived_snapshots++;
						

						if(current_tick > 0)
							snaploss += game_tick-current_tick-1;
						
						current_tick = game_tick;
						
						// we got two snapshots until we see us self as connected
						if(recived_snapshots <= 2)
						{
							snapshots[SNAP_PREV] = snapshots[SNAP_CURRENT];
							snapshots[SNAP_CURRENT] = snap;
						}
						
						if(recived_snapshots == 2)
						{
							local_start_time = time_get();
							client_set_state(CLIENTSTATE_ONLINE);
						}
						
						int64 now = time_get();
						int64 t = now - game_tick*time_freq()/50;
						if(game_start_time == -1 || t < game_start_time)
						{
							if(config.debug)
								dbg_msg("client", "adjusted time");
							game_start_time = t;
						}
						
						int64 wanted = game_start_time+(game_tick*time_freq())/50;
						float current_latency = (now-wanted)/(float)time_freq();
						latency = latency*0.95f+current_latency*0.05f;
						
						// ack snapshot
						msg_pack_start_system(NETMSG_SNAPACK, 0);
						msg_pack_int(game_tick);
						msg_pack_end();
						client_send_msg();
					}
				}
				else
				{
					dbg_msg("client", "snapshot reset!");
					snapshot_part = 0;
				}
			}
		}
		else
		{
			// game message
			modc_message(msg);
		}
	}
}


static void client_pump_network()
{
	net.update();

	// check for errors		
	if(client_state() != CLIENTSTATE_OFFLINE && net.state() == NETSTATE_OFFLINE)
	{
		// TODO: add message to the user there
		client_set_state(CLIENTSTATE_OFFLINE);
		dbg_msg("client", "offline error='%s'", net.error_string());
	}

	//
	if(client_state() == CLIENTSTATE_CONNECTING && net.state() == NETSTATE_ONLINE)
	{
		// we switched to online
		dbg_msg("client", "connected, sending info");
		client_set_state(CLIENTSTATE_LOADING);
		client_send_info();
	}
	
	// process packets
	NETPACKET packet;
	while(net.recv(&packet))
		client_process_packet(&packet);
}

static void client_run(const char *direct_connect_server)
{
	local_start_time = time_get();
	snapshot_part = 0;
	info_request_begin = 0;
	info_request_end = 0;
	
	client_serverbrowse_init();
	
	// init graphics and sound
	if(!gfx_init())
		return;

	snd_init(); // sound is allowed to fail
	
	// load data
	if(!client_load_data())
		return;

	// init menu
	modmenu_init(); // TODO: remove
	
	// init snapshotting
	snap_init();
	
	// init the mod
	modc_init();
	
	// open socket
	NETADDR4 bindaddr;
	mem_zero(&bindaddr, sizeof(bindaddr));
	net.open(bindaddr, 0);
	
	//
	net_host_lookup(config.masterserver, MASTERSERVER_PORT, &master_server);

	// connect to the server if wanted
	if(direct_connect_server)
		client_connect(direct_connect_server);
		
	//int64 inputs_per_second = 50;
	//int64 time_per_input = time_freq()/inputs_per_second;
	int64 game_starttime = time_get();
	int64 last_input = game_starttime;
	
	int64 reporttime = time_get();
	int64 reportinterval = time_freq()*1;
	int frames = 0;
	
	input::set_mouse_mode(input::mode_relative);
	
	while (1)
	{	
		frames++;
		int64 frame_start_time = time_get();

		// switch snapshot
		if(recived_snapshots >= 3)
		{
			int64 now = time_get();
			while(1)
			{
				snapshot_info *cur = snapshots[SNAP_CURRENT];
				int64 tickstart = game_start_time + (cur->tick+1)*time_freq()/50;
				int64 t = tickstart;
				if(latency > 0)
					t += (int64)(time_freq()*(latency*1.1f));

				if(t < now)
				{
					snapshot_info *next = snapshots[SNAP_CURRENT]->next;
					if(next)
					{
						snapshots[SNAP_PREV] = snapshots[SNAP_CURRENT];
						snapshots[SNAP_CURRENT] = next;
						if(snapshots[SNAP_CURRENT] && snapshots[SNAP_PREV])
							modc_newsnapshot();
					}
					else
					{
						extra_polating = 1;
						break;
					}
				}
				else
				{
					extra_polating = 0;
					break;
				}
			}
			
			if(snapshots[SNAP_CURRENT] && snapshots[SNAP_PREV])
			{
				int64 curtick_start = game_start_time + (snapshots[SNAP_CURRENT]->tick+1)*time_freq()/50;
				if(latency > 0)
					curtick_start += (int64)(time_freq()*(latency*1.1f));
					
				int64 prevtick_start = game_start_time + (snapshots[SNAP_PREV]->tick+1)*time_freq()/50;
				if(latency > 0)
					prevtick_start += (int64)(time_freq()*(latency*1.1f));
					
				intratick = (now - prevtick_start) / (float)(curtick_start-prevtick_start);
			}
		}

		// send input
		if(client_state() == CLIENTSTATE_ONLINE)
		{
			if(config.stress&1 && client_localtime() > 10.0f)
				client_disconnect();
			
			if(input_is_changed || time_get() > last_input+time_freq())
			{
				client_send_input();
				input_is_changed = 0;
				last_input = time_get();
			}
		}
		
		if(client_state() == CLIENTSTATE_OFFLINE && config.stress && (frames%100) == 0)
			client_connect(config.cl_stress_server);
		
		// update input
		inp_update();
		
		// refocus
		if(!gfx_window_active())
		{
			if(window_must_refocus == 0)
			{
				input::set_mouse_mode(input::mode_absolute);
			}
			window_must_refocus = 1;
		}

		if(window_must_refocus && gfx_window_active())
		{
			if(window_must_refocus < 3)
			{
				input::set_mouse_mode(input::mode_absolute);
				window_must_refocus++;
			}

			if(inp_button_pressed(input::mouse_1))
			{
				input::set_mouse_mode(input::mode_relative);
				window_must_refocus = 0;
			}
		}

		// screenshot button
		if(inp_key_down(input::f10))
			gfx_screenshot();

		// panic button
		if(config.debug)
		{
			if(input::pressed(input::f1))
				input::set_mouse_mode(input::mode_absolute);
			if(input::pressed(input::f2))
				input::set_mouse_mode(input::mode_relative);

			if(input::pressed(input::lctrl) && input::pressed('Q'))
				break;
		
			if(input::pressed(input::f5))
			{
				// ack snapshot
				msg_pack_start_system(NETMSG_SNAPACK, 0);
				msg_pack_int(-1);
				msg_pack_end();
				client_send_msg();
			}
		}
			
		// pump the network
		client_pump_network();
		
		// update the server browser
		client_serverbrowse_update();
		
		// render
		if(config.stress)
		{
			if((frames%10) == 0)
			{
				client_render();
				gfx_swap();
			}
		}
		else
		{
			client_render();
			gfx_swap();
		}
		
		// check conditions
		if(client_state() == CLIENTSTATE_QUITING)
			break;

		// be nice
		if(config.cpu_throttle || !gfx_window_active())
			thread_sleep(1);
		
		if(reporttime < time_get())
		{
			if(config.debug)
			{
				dbg_msg("client/report", "fps=%.02f netstate=%d",
					frames/(float)(reportinterval/time_freq()), net.state());
			}
			frames = 0;
			reporttime += reportinterval;
		}
		
		// update frametime
		frametime = (time_get()-frame_start_time)/(float)time_freq();
	}
	
	modc_shutdown();
	client_disconnect();

	modmenu_shutdown(); // TODO: remove this
	
	gfx_shutdown();
	snd_shutdown();
}


int editor_main(int argc, char **argv);

//client main_client;

int main(int argc, char **argv)
{
	dbg_msg("client", "starting...");
	
	config_reset();

#ifdef CONF_PLATFORM_MACOSX
	const char *config_filename = "~/.teewars";
#else
	const char *config_filename = "default.cfg";
#endif

	for(int i = 1; i < argc; i++)
	{
		if(argv[i][0] == '-' && argv[i][1] == 'f' && argv[i][2] == 0 && argc - i > 1)
		{
			config_filename = argv[i+1];
			i++;
		}
	}

	config_load(config_filename);

	const char *direct_connect_server = 0x0;
	snd_set_master_volume(config.volume / 255.0f);
	bool editor = false;

	// init network, need to be done first so we can do lookups
	net_init();

	// parse arguments
	for(int i = 1; i < argc; i++)
	{
		if(argv[i][0] == '-' && argv[i][1] == 'c' && argv[i][2] == 0 && argc - i > 1)
		{
			// -c SERVER:PORT
			i++;
			direct_connect_server = argv[i];
		}
		else if(argv[i][0] == '-' && argv[i][1] == 'e' && argv[i][2] == 0)
		{
			editor = true;
		}
		else
			config_set(argv[i]);
	}
	
	if(editor)
		editor_main(argc, argv);
	else
	{
		// start the client
		client_run(direct_connect_server);
	}
	return 0;
}