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/*
game/ship.cc
This file is part of the Osirion project and is distributed under
the terms and conditions of the GNU General Public License version 2
*/
// project headers
#include "game/game.h"
#include "game/ship.h"
#include "math/mathlib.h"
// C++ headers
#include <iostream>
using math::degrees360f;
using math::degrees180f;
namespace game {
Ship::Ship() : core::EntityControlable(0)
{
type = ship_enttype;
// ship specs
acceleration = 1.5f;
max_speed = 4.0f;
turn_speed = 0.5f;
}
Ship::~Ship()
{
}
void Ship::frame(float seconds)
{
if (target_thrust < 0) target_thrust = 0.0f;
else if(target_thrust > 1) target_thrust = 1.0f;
// update direction
float direction_offset = degrees180f(target_direction - direction);
float d = turn_speed * seconds * direction_offset;
direction = degrees360f(direction + d);
// update speed
if (speed < target_thrust * max_speed) {
speed += acceleration * seconds;
if (speed > target_thrust * max_speed) {
speed = target_thrust * max_speed;
}
} else if(speed > target_thrust * max_speed) {
speed -= acceleration * seconds;
if (speed < 0) speed = 0;
}
// location TODO avoid sin/cos calculations
location.x += cosf(direction * M_PI / 180) * speed * seconds;
location.z -= sinf(direction * M_PI / 180) * speed * seconds;
}
} // namespace game
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