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/*
base/npc.cc
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#include "base/npc.h"
#include "base/game.h"
namespace game {
// NPC Wingman factory function
NPC *NPC::add_wingman(Ship *leader)
{
if (!leader) {
return 0;
}
if (leader->state() != Entity::Normal) {
return 0;
}
NPC *npc = new NPC(ProfileWingman, leader->shipmodel());
npc->set_leader(leader);
npc->set_owner(leader->owner());
npc->set_name("Wingman");
npc->set_mood(MoodFormation);
npc->set_color(npc->leader()->color());
npc->set_color_second(npc->leader()->color_second());
npc->set_location(leader->location() - leader->axis().forward() * 2.0f * (leader->radius() + npc->radius()));
npc->set_axis(leader->axis());
npc->set_zone(leader->zone());
npc->reset();
return npc;
}
NPC::NPC(const Profile profile, const ShipModel *shipmodel) : Ship(0, shipmodel)
{
npc_profile = profile;
npc_mood = MoodWander;
npc_destroyed_timestamp = 0;
}
void NPC::set_mood(const Mood mood)
{
npc_mood = mood;
}
void NPC::set_leader(Ship *leader)
{
npc_leader = leader;
}
void NPC::frame(const unsigned long elapsed)
{
if (state() == core::Entity::Destroyed) {
if (!npc_destroyed_timestamp) {
npc_destroyed_timestamp = core::game()->time();
} else if (npc_destroyed_timestamp + 10.0f < core::game()->time()) {
// stay alive for 10 more seconds while explosion particles are drawn
die();
}
} else {
// FIXME verify the leader is still alive
// TODO pilot magic and mood witchcraft
if (leader()) {
// verify leader still exists
if (!core::Entity::find(leader())) {
set_leader(0);
explode();
npc_destroyed_timestamp = core::game()->time();
} else if (leader()->zone() == zone()) {
// rotate towards leader: direction
math::Vector3f d(leader()->location() - location());
float distance = d.length();
d.normalize();
float direction_angle = math::dotproduct(axis().forward(), d);
float direction_sign = math::sgnf(math::dotproduct(axis().left(), d));
if (direction_sign < 0 ) {
target_direction = direction_sign;
} else if (direction_angle + MIN_DELTA < 1.0f ) {
target_direction = direction_sign * direction_angle;
} else {
target_direction = 0.0f;
}
// rotate towards leader: pitch
direction_angle = math::dotproduct(axis().forward(), d);
direction_sign = math::sgnf(math::dotproduct(axis().up(), d));
if (direction_sign < 0 ) {
target_pitch = direction_sign;
} else if (direction_angle + MIN_DELTA < 1.0f ) {
target_pitch = direction_sign * direction_angle;
} else {
target_pitch = 0.0f;
}
const float r = 2.0f * (radius() + leader()->radius());
if (distance > 2.0f * r + 50.0f) {
if (state() == core::Entity::Normal) {
// enable impulse drive
func_impulse();
}
} else {
if (state() == core::Entity::Impulse) {
if (leader()->state() != core::Entity::Impulse) {
// disbable impulse drive
func_impulse();
}
} else if (state() == core::Entity::Normal) {
if ((leader()->state() == core::Entity::Impulse) || (leader()->state() == core::Entity::ImpulseInitiate)) {
// enable impulse drive
func_impulse();
}
}
}
if (distance > 2.0f * r) {
target_thrust = 1.0f;
} else if (distance > r) {
target_thrust = (distance - r ) / r;
} else {
target_thrust = 0.0f;
}
} else {
target_direction = 0;
target_pitch = 0;
target_roll = 0;
target_strafe = 0.0f;
target_vstrafe = 0.0f;
target_afterburner = 0.0f;
target_thrust = 0;
if (state() == core::Entity::Impulse) {
func_impulse();
}
}
}
}
// run a ship game frame
Ship::frame(elapsed);
}
} // namespace game
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