// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
// 02111-1307, USA.
+#include <config.h>
-#include <stdio.h>
-
-#include "scene.h"
-#include "defines.h"
#include "physic.h"
-#include "timer.h"
-#include "world.h"
-#include "level.h"
Physic::Physic()
: ax(0), ay(0), vx(0), vy(0), gravity_enabled(true)
void
Physic::set_velocity_x(float nvx)
{
- vx = -nvx;
+ vx = nvx;
}
void
void
Physic::set_velocity(float nvx, float nvy)
{
- vx = nvx;
- vy = -nvy;
+ vx = nvx;
+ vy = -nvy;
}
void Physic::inverse_velocity_x()
gravity_enabled = enable_gravity;
}
-void
-Physic::apply(float frame_ratio, float &x, float &y)
+Vector
+Physic::get_movement(float elapsed_time)
{
- float gravity = World::current()->get_level()->gravity;
- float grav;
- if(gravity_enabled)
- grav = gravity / 100.0;
- else
- grav = 0;
+ float grav = gravity_enabled ? 1000 : 0;
+
+ Vector result(
+ vx * elapsed_time + ax * elapsed_time * elapsed_time,
+ vy * elapsed_time + (ay + grav) * elapsed_time * elapsed_time
+ );
+ vx += ax * elapsed_time;
+ vy += (ay + grav) * elapsed_time;
- x += vx * frame_ratio + ax * frame_ratio * frame_ratio;
- y += vy * frame_ratio + (ay + grav) * frame_ratio * frame_ratio;
- vx += ax * frame_ratio;
- vy += (ay + grav) * frame_ratio;
+ return result;
}
+