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/* ship.cc
This file is part of the Osirion project
*/
// C++ headers
#include <iostream>
// project headers
#include "common/functions.h"
#include "common/osirion.h"
#include "ship.h"
Ship::Ship()
{
speed = 0;
yaw = 0;
yaw_offset = 0;
thrust = 0;
// ship specs
acceleration = 6 * GAMESCALE;
max_speed = 16.0f * GAMESCALE;
max_yaw_offset = 45;
yaw_speed = 4;
}
Ship::~Ship()
{
}
void Ship::update(float elapsed)
{
// update yaw
float d = yaw_speed * elapsed * yaw_offset;
yaw_offset -= d;
yaw +=d;
// update thrust
if (speed < thrust * max_speed) {
speed += acceleration * elapsed;
if (speed > thrust * max_speed) {
speed = thrust * max_speed;
}
} else if(speed > thrust * max_speed) {
speed -= acceleration * elapsed;
if (speed < 0) speed = 0;
}
// location TODO avoid sin/cos calculations
location.x += cosf(yaw * M_PI / 180) * speed * elapsed;
location.z -= sinf(yaw * M_PI / 180) * speed * elapsed;
}
void Ship::thrust_increase()
{
thrust += 0.05;
if (thrust > 1) thrust = 1;
}
void Ship::thrust_decrease()
{
thrust -= 0.08;
if (thrust < 0) thrust = 0;
}
void Ship::turn_left()
{
//yaw = degreesf(yaw + 2);
yaw_offset += 2;
if (yaw_offset > max_yaw_offset)
yaw_offset = max_yaw_offset;
}
void Ship::turn_right()
{
//yaw = degreesf(yaw - 2);
yaw_offset -= 2;
if (yaw_offset < -max_yaw_offset)
yaw_offset = - max_yaw_offset;
}
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