ddnet/src/game/server/game_server.cpp

#include <stdlib.h>
#include <string.h>
#include <engine/config.h>
#include "../game.h"
#include "data.h"
#include "game_server.h"

using namespace baselib;

// --------- DEBUG STUFF ---------
const bool debug_bots = true;

// --------- PHYSICS TWEAK! --------
const float ground_control_speed = 7.0f;
const float ground_control_accel = 2.0f;
const float ground_friction = 0.5f;
const float ground_jump_speed = 12.0f;
const float air_control_speed = 3.5f;
const float air_control_accel = 1.2f;
const float air_friction = 0.95f;
const float hook_length = 32*10.0f;
const float hook_fire_speed = 45.0f;
const float hook_drag_accel = 3.0f;
const float hook_drag_speed = 15.0f;
const float gravity = 0.5f;

class player* get_player(int index);
void create_damageind(vec2 p, vec2 dir, int amount);
void create_explosion(vec2 p, int owner, int weapon, bool bnodamage);
void create_smoke(vec2 p);
void create_sound(vec2 pos, int sound, int loopflags = 0);
class player *intersect_player(vec2 pos0, vec2 pos1, vec2 &new_pos, class entity *notthis = 0);

template<typename T>
T saturated_add(T min, T max, T current, T modifier)
{
	if(modifier < 0)
	{
		if(current < min)
			return current;
		current += modifier;
		if(current < min)
			current = min;
		return current;
	}
	else
	{
		if(current > max)
			return current;
		current += modifier;
		if(current > max)
			current = max;
		return current;
	}
}

// TODO: rewrite this smarter!
void move_box(vec2 *inout_pos, vec2 *inout_vel, vec2 size, float elasticity)
{
	// do the move
	vec2 pos = *inout_pos;
	vec2 vel = *inout_vel;
	
	float distance = length(vel);
	int max = (int)distance;
	
	vec2 offsets[4] = {	vec2(-size.x/2, -size.y/2), vec2( size.x/2, -size.y/2),
						vec2(-size.x/2,  size.y/2), vec2( size.x/2,  size.y/2)};
	
	if(distance > 0.00001f)
	{
		vec2 old_pos = pos;
		for(int i = 0; i <= max; i++)
		{
			float amount = i/(float)max;
			if(max == 0)
				amount = 0;
			
			vec2 new_pos = pos + vel*amount; // TODO: this row is not nice

			for(int p = 0; p < 4; p++)
			{
				vec2 np = new_pos+offsets[p];
				vec2 op = old_pos+offsets[p];
				if(col_check_point(np))
				{
					int affected = 0;
					if(col_check_point(np.x, op.y))
					{
						vel.x = -vel.x*elasticity;
						pos.x = old_pos.x;
						new_pos.x = old_pos.x;
						affected++;
					}

					if(col_check_point(op.x, np.y))
					{
						vel.y = -vel.y*elasticity;
						pos.y = old_pos.y;
						new_pos.y = old_pos.y;
						affected++;
					}
					
					if(!affected)
					{
						new_pos = old_pos;
						pos = old_pos;
						vel *= -elasticity;
					}
				}
			}
			
			old_pos = new_pos;
		}
		
		pos = old_pos;
	}
	
	*inout_pos = pos;
	*inout_vel = vel;
}

//////////////////////////////////////////////////
// Event handler
//////////////////////////////////////////////////
event_handler::event_handler()
{
	clear();
}

void *event_handler::create(int type, int size)
{
	void *p = &data[current_offset];
	offsets[num_events] = current_offset;
	types[num_events] = type;
	sizes[num_events] = size;
	current_offset += size;
	num_events++;
	return p;
}

void event_handler::clear()
{
	num_events = 0;
	current_offset = 0;
}

void event_handler::snap(int snapping_client)
{
	for(int i = 0; i < num_events; i++)
	{
		void *d = snap_new_item(types[i], i, sizes[i]);
		mem_copy(d, &data[offsets[i]], sizes[i]);
	}
}

event_handler events;

//////////////////////////////////////////////////
// Entity
//////////////////////////////////////////////////
entity::entity(int objtype)
{
	this->objtype = objtype;
	pos = vec2(0,0);
	flags = FLAG_ALIVE;
	proximity_radius = 0;
	
	current_id++;
	id = current_id;
	
	next_entity = 0;
	prev_entity = 0;
	prev_type_entity = 0;
	next_type_entity = 0;
}

entity::~entity()
{
}

int entity::current_id = 1;

//////////////////////////////////////////////////
// game world
//////////////////////////////////////////////////
game_world::game_world()
{
	paused = false;
	reset_requested = false;
	first_entity = 0x0;
	for(int i = 0; i < NUM_ENT_TYPES; i++)
		first_entity_types[i] = 0;
}

int game_world::find_entities(vec2 pos, float radius, entity **ents, int max)
{
	int num = 0;
	for(entity *ent = first_entity; ent; ent = ent->next_entity)
	{
		if(!(ent->flags&entity::FLAG_ALIVE))
			continue;
			
		if(distance(ent->pos, pos) < radius+ent->proximity_radius)
		{
			ents[num] = ent;
			num++;
			if(num == max)
				break;
		}
	}
	
	return num;
}

int game_world::find_entities(vec2 pos, float radius, entity **ents, int max, const int* types, int maxtypes)
{
	int num = 0;
	for(int t = 0; t < maxtypes; t++)
	{
		for(entity *ent = first_entity_types[types[t]]; ent; ent = ent->next_type_entity)
		{
			if(!(ent->flags&entity::FLAG_ALIVE))
				continue;
			
			if(distance(ent->pos, pos) < radius+ent->proximity_radius)
			{
				ents[num] = ent;
				num++;
				if(num == max)
					break;
			}
		}
	}
	
	return num;
}

void game_world::insert_entity(entity *ent)
{
	// insert it
	if(first_entity)
		first_entity->prev_entity = ent;
	ent->next_entity = first_entity;
	ent->prev_entity = 0x0;
	first_entity = ent;

	// into typelist aswell
	if(first_entity_types[ent->objtype])
		first_entity_types[ent->objtype]->prev_type_entity = ent;
	ent->next_type_entity = first_entity_types[ent->objtype];
	ent->prev_type_entity = 0x0;
	first_entity_types[ent->objtype] = ent;
}

void game_world::destroy_entity(entity *ent)
{
	ent->set_flag(entity::FLAG_DESTROY);
}

void game_world::remove_entity(entity *ent)
{
	// remove
	if(ent->prev_entity)
		ent->prev_entity->next_entity = ent->next_entity;
	else
		first_entity = ent->next_entity;
	if(ent->next_entity)
		ent->next_entity->prev_entity = ent->prev_entity;

	if(ent->prev_type_entity)
		ent->prev_type_entity->next_type_entity = ent->next_type_entity;
	else
		first_entity_types[ent->objtype] = ent->next_type_entity;
	if(ent->next_type_entity)
		ent->next_type_entity->prev_type_entity = ent->prev_type_entity;
}

//
void game_world::snap(int snapping_client)
{
	for(entity *ent = first_entity; ent; ent = ent->next_entity)
		ent->snap(snapping_client);
}

void game_world::reset()
{
	// reset all entities
	for(entity *ent = first_entity; ent; ent = ent->next_entity)
		ent->reset();
	remove_entities();
	
	for(entity *ent = first_entity; ent; ent = ent->next_entity)
		ent->post_reset();
	remove_entities();
	
	reset_requested = false;
}

void game_world::remove_entities()
{
	// destroy objects marked for destruction
	entity *ent = first_entity;
	while(ent)
	{
		entity *next = ent->next_entity;
		if(ent->flags&entity::FLAG_DESTROY)
		{
			remove_entity(ent);
			ent->destroy();
		}
		ent = next;
	}
}

void game_world::tick()
{
	if(reset_requested)
		reset();
	
	if(!paused)
	{
		// update all objects
		for(entity *ent = first_entity; ent; ent = ent->next_entity)
			ent->tick();
			
		for(entity *ent = first_entity; ent; ent = ent->next_entity)
			ent->tick_defered();
	}
	
	remove_entities();
}

game_world world;

//////////////////////////////////////////////////
// game object
//////////////////////////////////////////////////
gameobject::gameobject()
: entity(OBJTYPE_GAME)
{
	game_over_tick = -1;
	sudden_death = 0;
	round_start_tick = server_tick();
}

void gameobject::endround()
{
	world.paused = true;
	game_over_tick = server_tick();
	sudden_death = 0;
}

void gameobject::resetgame()
{
	world.reset_requested = true;
}

void gameobject::startround()
{
	resetgame();
	
	round_start_tick = server_tick();
	sudden_death = 0;
	game_over_tick = -1;
	world.paused = false;
}

void gameobject::post_reset()
{
	for(int i = 0; i < MAX_CLIENTS; i++)
	{
		if(players[i].client_id != -1)
			players[i].respawn();
	}
}

void gameobject::tick()
{
	if(game_over_tick == -1)
	{
		// game is running
		
		// gather some stats
		int topscore = 0;
		int topscore_count = 0;
		for(int i = 0; i < MAX_CLIENTS; i++)
		{
			if(players[i].client_id != -1)
			{
				if(players[i].score > topscore)
				{
					topscore = players[i].score;
					topscore_count = 1;
				}
				else if(players[i].score == topscore)
					topscore_count++;
			}
		}
		
		// check score win condition
		if((config.scorelimit > 0 && topscore >= config.scorelimit) ||
			(config.timelimit > 0 && (server_tick()-round_start_tick) >= config.timelimit*server_tickspeed()*60))
		{
			if(topscore_count == 1)
				endround();
			else
				sudden_death = 1;
		}
	}
	else
	{
		// game over.. wait for restart
		if(server_tick() > game_over_tick+server_tickspeed()*10)
			startround();
	}
}

void gameobject::snap(int snapping_client)
{
	obj_game *game = (obj_game *)snap_new_item(OBJTYPE_GAME, id, sizeof(obj_game));
	game->paused = world.paused;
	game->game_over = game_over_tick==-1?0:1;
	game->sudden_death = sudden_death;
	
	game->score_limit = config.scorelimit;
	game->time_limit = config.timelimit;
	game->round_start_tick = round_start_tick;
}

gameobject gameobj;

//////////////////////////////////////////////////
// projectile
//////////////////////////////////////////////////
projectile::projectile(int type, int owner, vec2 pos, vec2 vel, int span, entity* powner,
	int damage, int flags, float force, int sound_impact, int weapon)
: entity(OBJTYPE_PROJECTILE)
{
	this->type = type;
	this->pos = pos;
	this->vel = vel;
	this->lifespan = span;
	this->owner = owner;
	this->powner = powner;
	this->flags = flags;
	this->force = force;
	this->damage = damage;
	this->sound_impact = sound_impact;
	this->weapon = weapon;
	world.insert_entity(this);
}

void projectile::reset()
{
	world.destroy_entity(this);
}

void projectile::tick()
{
	vec2 oldpos = pos;
	vel.y += 0.25f;
	pos += vel;
	lifespan--;
	
	// check player intersection as well
	entity *targetplayer = (entity*)intersect_player(oldpos, pos, oldpos, powner);
	if(targetplayer || lifespan < 0 || col_check_point((int)pos.x, (int)pos.y))
	{
		if (lifespan >= 0)
			create_sound(pos, sound_impact);
			
		if (flags & PROJECTILE_FLAGS_EXPLODE)
			create_explosion(oldpos, owner, weapon, false);
		else if (targetplayer)
			targetplayer->take_damage(normalize(vel) * max(0.001f, force), damage, owner, weapon);
			
		world.destroy_entity(this);
	}
}

void projectile::snap(int snapping_client)
{
	obj_projectile *proj = (obj_projectile *)snap_new_item(OBJTYPE_PROJECTILE, id, sizeof(obj_projectile));
	proj->x = (int)pos.x;
	proj->y = (int)pos.y;
	proj->vx = (int)vel.x; // TODO: should be an angle
	proj->vy = (int)vel.y;
	proj->type = type;
}

//////////////////////////////////////////////////
// player
//////////////////////////////////////////////////
// TODO: move to separate file
player::player()
: entity(OBJTYPE_PLAYER)
{
	init();
}

void player::init()
{
	proximity_radius = phys_size;
	name[0] = 'n';
	name[1] = 'o';
	name[2] = 'o';
	name[3] = 'b';
	name[4] = 0;
	client_id = -1;
	reset();
}

void player::reset()
{
	release_hooked();
	release_hooks();
	
	pos = vec2(0.0f, 0.0f);
	vel = vec2(0.0f, 0.0f);
	direction = vec2(0.0f, 1.0f);
	score = 0;
	dead = true;
	die_tick = 0;
}

void player::destroy() {  }
	
void player::respawn()
{
	health = PLAYER_MAXHEALTH;
	armor = 0;
	jumped = 0;
	dead = false;
	set_flag(entity::FLAG_ALIVE);
	
	mem_zero(&input, sizeof(input));
	vel = vec2(0.0f, 0.0f);
	
	// get spawn point
	int start, num;
	map_get_type(1, &start, &num);
	
	if(num)
	{
		mapres_spawnpoint *sp = (mapres_spawnpoint*)map_get_item(start + (rand()%num), NULL, NULL);
		pos = vec2((float)sp->x, (float)sp->y);
	}
	else
		pos = vec2(100.0f, -60.0f);
	defered_pos = pos;
		
	// init weapons
	mem_zero(&weapons, sizeof(weapons));
	weapons[WEAPON_HAMMER].got = true;
	weapons[WEAPON_HAMMER].ammo = -1;
	weapons[WEAPON_GUN].got = true;
	weapons[WEAPON_GUN].ammo = 10;
	active_weapon = WEAPON_GUN;
	reload_timer = 0;
	
	create_sound(pos, SOUND_PLAYER_SPAWN);
}

bool player::is_grounded()
{
	if(col_check_point((int)(pos.x+phys_size/2), (int)(pos.y+phys_size/2+5)))
		return true;
	if(col_check_point((int)(pos.x-phys_size/2), (int)(pos.y+phys_size/2+5)))
		return true;
	return false;
}

// releases the hooked player
void player::release_hooked()
{
	hook_state = HOOK_IDLE;
	hooked_player = 0x0;
}

// release all hooks to this player	
void player::release_hooks()
{
	// TODO: loop thru players only
	for(entity *ent = world.first_entity; ent; ent = ent->next_entity)
	{
		if(ent && ent->objtype == OBJTYPE_PLAYER)
		{
			player *p = (player*)ent;
			if(p->hooked_player == this)
				p->release_hooked();
		}
	}
}

void player::handle_weapons()
{
	// check reload timer
	if(reload_timer)
	{
		reload_timer--;
		return;
	}

	// switch weapon if wanted		
	if(input.activeweapon >= 0 && input.activeweapon < NUM_WEAPONS && weapons[input.activeweapon].got)
		active_weapon = input.activeweapon;

	if(input.fire)
	{
		if(reload_timer == 0)
		{
			// fire!
			if(weapons[active_weapon].ammo)
			{
				switch(active_weapon)
				{
					case WEAPON_HAMMER:
						break;

					case WEAPON_GUN:
						new projectile(WEAPON_PROJECTILETYPE_GUN,
							client_id,
							pos+vec2(0,0),
							direction*30.0f,
							100,
							this,
							1, 0, 0, -1, WEAPON_GUN);
						break;
					case WEAPON_ROCKET:
						new projectile(WEAPON_PROJECTILETYPE_ROCKET,
							client_id,
							pos+vec2(0,0),
							direction*15.0f,
							100,
							this,
							1, projectile::PROJECTILE_FLAGS_EXPLODE, 0, -1, WEAPON_ROCKET);						
						break;
					case WEAPON_SHOTGUN:
						for(int i = -2; i <= 2; i++)
						{
							float a = get_angle(direction);
							a += i*0.075f;
							new projectile(WEAPON_PROJECTILETYPE_SHOTGUN,
								client_id,
								pos+vec2(0,0),
								vec2(cosf(a), sinf(a))*25.0f,
								//vec2(cosf(a), sinf(a))*20.0f,
								server_tickspeed()/3,
								this,
								1, 0, 0, -1, WEAPON_SHOTGUN);
						}
						break;
				}
				
				weapons[active_weapon].ammo--;
			}
			else
			{
				// click!!! click
			}
			
			attack_tick = server_tick();
			reload_timer = 10; // make this variable depending on weapon
		}
	}
}

void player::tick()
{
	// TODO: rework the input to be more robust
	// TODO: remove this tick count, it feels weird
	if(dead)
	{
		if(server_tick()-die_tick >= server_tickspeed()*3) // auto respawn after 3 sec
			respawn();
		if(input.fire && server_tick()-die_tick >= server_tickspeed()/2) // auto respawn after 0.5 sec
			respawn();
		return;
	}
	
	// fetch some info
	bool grounded = is_grounded();
	direction = get_direction(input.angle);
	
	float max_speed = grounded ? ground_control_speed : air_control_speed;
	float accel = grounded ? ground_control_accel : air_control_accel;
	float friction = grounded ? ground_friction : air_friction;
	
	// handle movement
	if(input.left)
		vel.x = saturated_add(-max_speed, max_speed, vel.x, -accel);
	if(input.right)
		vel.x = saturated_add(-max_speed, max_speed, vel.x, accel);
		
	if(!input.left && !input.right)
		vel.x *= friction;
	
	// handle jumping
	if(input.jump)
	{
		if(!jumped && grounded)
		{
			create_sound(pos, SOUND_PLAYER_JUMP);
			vel.y = -ground_jump_speed;
			jumped++;
		}
	}
	else
		jumped = 0;
		
	// do hook
	if(input.hook)
	{
		if(hook_state == HOOK_IDLE)
		{
			hook_state = HOOK_FLYING;
			hook_pos = pos;
			hook_dir = direction;
		}
		else if(hook_state == HOOK_FLYING)
		{
			vec2 new_pos = hook_pos+hook_dir*hook_fire_speed;

			// Check against other players first
			for(entity *ent = world.first_entity; ent; ent = ent->next_entity)
			{
				if(ent && ent->objtype == OBJTYPE_PLAYER)
				{
					player *p = (player*)ent;
					if(p != this && distance(p->pos, new_pos) < p->phys_size)
					{
						hook_state = HOOK_GRABBED;
						hooked_player = p;
						break;
					}
				}
			}
			
			if(hook_state == HOOK_FLYING)
			{
				// check against ground
				if(col_intersect_line(hook_pos, new_pos, &new_pos))
				{
					hook_state = HOOK_GRABBED;
					hook_pos = new_pos;	
				}
				else if(distance(pos, new_pos) > hook_length)
				{
					hook_state = HOOK_RETRACTED;
				}
				else
					hook_pos = new_pos;
			}
			
			if(hook_state == HOOK_GRABBED)
				create_sound(pos, SOUND_HOOK_ATTACH);
		}
	}
	else
	{
		release_hooked();
		hook_pos = pos;
	}
		
	if(hook_state == HOOK_GRABBED)
	{
		if(hooked_player)
			hook_pos = hooked_player->pos;

		float d = distance(pos, hook_pos);
		vec2 dir = normalize(pos - hook_pos);		
		if(d > 10.0f) // TODO: fix tweakable variable
		{
			float accel = hook_drag_accel * (d/hook_length);
			vel.x = saturated_add(-hook_drag_speed, hook_drag_speed, vel.x, -accel*dir.x*0.75f);
			vel.y = saturated_add(-hook_drag_speed, hook_drag_speed, vel.y, -accel*dir.y);
		}
	}
		
	// fix influence of other players, collision + hook
	// TODO: loop thru players only
	for(entity *ent = world.first_entity; ent; ent = ent->next_entity)
	{
		if(ent && ent->objtype == OBJTYPE_PLAYER)
		{
			player *p = (player*)ent;
			if(p == this || !(p->flags&FLAG_ALIVE))
				continue; // make sure that we don't nudge our self
			
			// handle player <-> player collision
			float d = distance(pos, p->pos);
			vec2 dir = normalize(pos - p->pos);
			if(d < phys_size*1.25f)
			{
				float a = phys_size*1.25f - d;
				vel = vel + dir*a;
			}
			
			// handle hook influence
			if(p->hooked_player == this)
			{
				if(d > phys_size*1.50f) // TODO: fix tweakable variable
				{
					float accel = hook_drag_accel * (d/hook_length);
					vel.x = saturated_add(-hook_drag_speed, hook_drag_speed, vel.x, -accel*dir.x);
					vel.y = saturated_add(-hook_drag_speed, hook_drag_speed, vel.y, -accel*dir.y);
				}
			}
		}
	}
	
	// handle weapons
	handle_weapons();
	
	// add gravity
	vel.y += gravity;
	
	// do the move
	defered_pos = pos;
	move_box(&defered_pos, &vel, vec2(phys_size, phys_size), 0);
	return;
}

void player::tick_defered()
{
	// apply the new position
	pos = defered_pos;
}

void player::die(int killer, int weapon)
{
	// send the kill message
	msg_pack_start(MSG_KILLMSG, MSGFLAG_VITAL);
	msg_pack_int(killer);
	msg_pack_int(client_id);
	msg_pack_int(weapon);
	msg_pack_end();
	server_send_msg(-1);
	
	// a nice sound
	create_sound(pos, SOUND_PLAYER_DIE);
	
	// release all hooks
	release_hooked();
	release_hooks();
	
	// set dead state
	dead = true;
	die_tick = server_tick();
	clear_flag(entity::FLAG_ALIVE);
}

bool player::take_damage(vec2 force, int dmg, int from, int weapon)
{
	vel += force;

	// create healthmod indicator
	create_damageind(pos, normalize(force), dmg);

	if(armor)
	{
		armor -= 1;
		dmg--;
	}
	
	if(dmg > armor)
	{
		dmg -= armor;
		armor = 0;
		health -= dmg;
	}
	else
		armor -= dmg;
	
	damage_taken_tick = server_tick()+50;
	
	// check for death
	if(health <= 0)
	{
		// apply score
		if(from != -1)
		{
			if(from == client_id)
				score--;
			else
			{
				player *p = get_player(from);
				p->score++;
			}
		}
		
		die(from, weapon);
		return false;
	}

	if (dmg > 2)
		create_sound(pos, SOUND_PLAYER_PAIN_LONG);
	else
		create_sound(pos, SOUND_PLAYER_PAIN_SHORT);

	// spawn blood?
	return true;
}

void player::snap(int snaping_client)
{
	obj_player *player = (obj_player *)snap_new_item(OBJTYPE_PLAYER, client_id, sizeof(obj_player));

	player->x = (int)pos.x;
	player->y = (int)pos.y;
	player->vx = (int)vel.x;
	player->vy = (int)vel.y;
	player->emote = EMOTE_NORMAL;

	player->ammocount = weapons[active_weapon].ammo;
	player->health = 0;
	player->armor = 0;
	player->local = 0;
	player->clientid = client_id;
	player->weapon = active_weapon;
	player->attacktick = attack_tick;
	
	if(client_id == snaping_client)
	{
		player->local = 1;
		player->health = health;
		player->armor = armor;
	}
	
	if(dead)
		player->health = -1;
	
	if(length(vel) > 15.0f)
		player->emote = EMOTE_HAPPY;
	
	if(damage_taken_tick > server_tick())
		player->emote = EMOTE_PAIN;
	
	if(player->emote == EMOTE_NORMAL)
	{
		if((server_tick()%(50*5)) < 10)
			player->emote = EMOTE_BLINK;
	}
	
	player->hook_active = hook_state>0?1:0;
	player->hook_x = (int)hook_pos.x;
	player->hook_y = (int)hook_pos.y;
		
	player->angle = input.angle;
	player->score = score;
}

player players[MAX_CLIENTS];

//////////////////////////////////////////////////
// powerup
//////////////////////////////////////////////////
powerup::powerup(int _type, int _subtype)
: entity(OBJTYPE_POWERUP)
{
	type = _type;
	subtype = _subtype;
	proximity_radius = phys_size;
	
	reset();
	
	// TODO: should this be done here?
	world.insert_entity(this);
}

void powerup::reset()
{
	spawntick = -1;
}

void powerup::tick()
{
	// wait for respawn
	if(spawntick > 0)
	{
		if(server_tick() > spawntick)
			spawntick = -1;
		else
			return;
	}
	// Check if a player intersected us
	vec2 meh;
	player* pplayer = intersect_player(pos, pos + vec2(0,16), meh, 0);
	if (pplayer)
	{
		// player picked us up, is someone was hooking us, let them go
		int respawntime = -1;
		switch (type)
		{
		case POWERUP_TYPE_HEALTH:
			if(pplayer->health < PLAYER_MAXHEALTH)
			{
				pplayer->health = min((int)PLAYER_MAXHEALTH, pplayer->health + 1);
				respawntime = 20;
			}
			break;
		case POWERUP_TYPE_ARMOR:
			if(pplayer->armor < PLAYER_MAXARMOR)
			{
				pplayer->armor = min((int)PLAYER_MAXARMOR, pplayer->armor + 1);
				respawntime = 20;
			}
			break;
				
		case POWERUP_TYPE_WEAPON:
			if(subtype >= 0 && subtype < NUM_WEAPONS)
			{
				if(pplayer->weapons[subtype].ammo < 10 || !pplayer->weapons[subtype].got)
				{
					pplayer->weapons[subtype].got = true;
					pplayer->weapons[subtype].ammo = min(10, pplayer->weapons[subtype].ammo + 5);
					respawntime = 20;
				}
			}
			break;
		default:
			break;
		};
		
		if(respawntime >= 0)
			spawntick = server_tick() + server_tickspeed() * respawntime;
	}
}

void powerup::snap(int snapping_client)
{
	if(spawntick != -1)
		return;

	obj_powerup *up = (obj_powerup *)snap_new_item(OBJTYPE_POWERUP, id, sizeof(obj_powerup));
	up->x = (int)pos.x;
	up->y = (int)pos.y;
	up->type = type; // TODO: two diffrent types? what gives?
	up->subtype = subtype;
}

// POWERUP END ///////////////////////

player *get_player(int index)
{
	return &players[index];
}

void create_damageind(vec2 p, vec2 dir, int amount)
{
	float a = get_angle(dir);
	float s = a-pi/3;
	float e = a+pi/3;
	for(int i = 0; i < amount; i++)
	{
		float f = mix(s, e, float(i+1)/float(amount+2));
		ev_damageind *ev = (ev_damageind *)events.create(EVENT_DAMAGEINDICATION, sizeof(ev_damageind));
		ev->x = (int)p.x;
		ev->y = (int)p.y;
		ev->angle = (int)(f*256.0f);
	}
}

void create_explosion(vec2 p, int owner, int weapon, bool bnodamage)
{
	// create the event
	ev_explosion *ev = (ev_explosion *)events.create(EVENT_EXPLOSION, sizeof(ev_explosion));
	ev->x = (int)p.x;
	ev->y = (int)p.y;
	
	if (!bnodamage)
	{
		// deal damage
		entity *ents[64];
		const float radius = 128.0f;
		int num = world.find_entities(p, radius, ents, 64);
		for(int i = 0; i < num; i++)
		{
			vec2 diff = ents[i]->pos - p;
			vec2 forcedir(0,1);
			if (length(diff))
				forcedir = normalize(diff);
			float l = length(diff);
			float dmg = 5 * (1 - (l/radius));
			if((int)dmg)
				ents[i]->take_damage(forcedir*dmg*2, (int)dmg, owner, weapon);
		}
	}
}

void create_smoke(vec2 p)
{
	// create the event
	ev_explosion *ev = (ev_explosion *)events.create(EVENT_SMOKE, sizeof(ev_explosion));
	ev->x = (int)p.x;
	ev->y = (int)p.y;
}

void create_sound(vec2 pos, int sound, int loopingflags)
{
	if (sound < 0)
		return;

	// create a sound
	ev_sound *ev = (ev_sound *)events.create(EVENT_SOUND, sizeof(ev_sound));
	ev->x = (int)pos.x;
	ev->y = (int)pos.y;
	ev->sound = sound | loopingflags;
}

// TODO: should be more general
player* intersect_player(vec2 pos0, vec2 pos1, vec2& new_pos, entity* notthis)
{
	// Find other players
	entity *ents[64];
	vec2 dir = pos1 - pos0;
	float radius = length(dir * 0.5f);
	vec2 center = pos0 + dir * 0.5f;
	const int types[] = {OBJTYPE_PLAYER};
	int num = world.find_entities(center, radius, ents, 64, types, 1);
	for (int i = 0; i < num; i++)
	{
		// Check if entity is a player
		if (ents[i] != notthis)
		{
			new_pos = ents[i]->pos;
			return (player*)ents[i];
		}
	}

	return 0;
}

// Server hooks
void mods_tick()
{
	// clear all events
	events.clear();
	world.tick();
	
	if(world.paused) // make sure that the game object always updates
		gameobj.tick();

	if(debug_bots)
	{
		static int count = 0;
		if(count >= 0)
		{
			count++;
			if(count == 10)
			{
				for(int i = 0; i < 1; i++)
				{
					mods_client_enter(MAX_CLIENTS-i-1);
					strcpy(players[MAX_CLIENTS-i-1].name, "(bot)");
				}
				count = -1;
			}
		}
	}
}

void mods_snap(int client_id)
{
	world.snap(client_id);
	events.snap(client_id);
}

void mods_client_input(int client_id, void *input)
{
	if(!world.paused)
	{
		players[client_id].previnput = players[client_id].input;
		players[client_id].input = *(player_input*)input;
	}
}

void mods_client_enter(int client_id)
{
	players[client_id].init();
	players[client_id].client_id = client_id;
	world.insert_entity(&players[client_id]);
	players[client_id].respawn();
	
	
	client_info info; // fetch login name
	if(server_getclientinfo(client_id, &info))
		strcpy(players[client_id].name, info.name);
	else
		strcpy(players[client_id].name, "(bot)");
	
	msg_pack_start(MSG_SETNAME, MSGFLAG_VITAL);
	msg_pack_int(client_id);
	msg_pack_string(players[client_id].name, 64);
	msg_pack_end();
	server_send_msg(-1);
	
	for(int i = 0; i < MAX_CLIENTS; i++)
	{
		if(players[client_id].client_id != -1)
		{
			msg_pack_start(MSG_SETNAME, MSGFLAG_VITAL);
			msg_pack_int(i);
			msg_pack_string(players[i].name, 64);
			msg_pack_end();
			server_send_msg(client_id);
		}
	}
}

void mods_client_drop(int client_id)
{
	players[client_id].client_id = -1;
	world.remove_entity(&players[client_id]);
}

void mods_message(int msg, int client_id)
{
	if(msg == MSG_SAY)
	{
		msg_pack_start(MSG_CHAT, MSGFLAG_VITAL);
		msg_pack_int(client_id);
		msg_pack_string(msg_unpack_string(), 512);
		msg_pack_end();
		server_send_msg(-1);
	}
}

void mods_init()
{
	col_init(32);

	int start, num;
	map_get_type(MAPRES_ITEM, &start, &num);
	
	// TODO: this is way more complicated then it should be
	for(int i = 0; i < num; i++)
	{
		mapres_item *it = (mapres_item *)map_get_item(start+i, 0, 0);
		
		int type = -1;
		int subtype = -1;
		
		switch(it->type)
		{
		case ITEM_WEAPON_GUN:
			type = POWERUP_TYPE_WEAPON;
			subtype = WEAPON_TYPE_GUN;
			break;
		case ITEM_WEAPON_SHOTGUN:
			type = POWERUP_TYPE_WEAPON;
			subtype = WEAPON_TYPE_SHOTGUN;
			break;
		case ITEM_WEAPON_ROCKET:
			type = POWERUP_TYPE_WEAPON;
			subtype = WEAPON_TYPE_ROCKET;
			break;
		case ITEM_WEAPON_HAMMER:
			type = POWERUP_TYPE_WEAPON;
			subtype = WEAPON_TYPE_MELEE;
			break;
		
		case ITEM_HEALTH:
			type = POWERUP_TYPE_HEALTH;
			break;
		
		case ITEM_ARMOR:
			type = POWERUP_TYPE_ARMOR;
			break;
		};
		
		powerup *ppower = new powerup(type, subtype);
		ppower->pos = vec2(it->x, it->y);
	}
	
	world.insert_entity(&gameobj);
}

void mods_shutdown() {}
void mods_presnap() {}
void mods_postsnap() {}