+
+ // Flapping, Marek's version
+ if (input.jump == DOWN && can_flap)
+ {
+ if (!flapping_timer.started())
+ {
+ flapping_timer.start(TUX_FLAPPING_TIME);
+ flapping_velocity = physic.get_velocity_x();
+ }
+ if (!flapping_timer.check())
+ {
+ can_flap = false;
+ falling_from_flap = true;
+ }
+ jumping = true;
+ flapping = true;
+ if (flapping_timer.get_gone() <= TUX_FLAPPING_TIME)
+ {
+ float cv;
+ if (flapping_velocity == 0) {cv = 0;}
+ else {cv = flapping_velocity*(sqrt(TUX_FLAPPING_TIME-(float)flapping_timer.get_gone()))/sqrt(TUX_FLAPPING_TIME);}
+ //Handle change of direction while flapping
+ if (((dir == LEFT) && (cv > 0)) || (dir == RIGHT) && (cv < 0)) {cv *= (-1);}
+ physic.set_velocity_x(cv);
+ physic.set_velocity_y((float)flapping_timer.get_gone()/850);
+ }
+ }
+
+ /* // Flapping, Ryan's version
+ if (input.jump == DOWN && can_flap)
+ {
+ if (!flapping_timer.started())
+ {
+ flapping_timer.start(TUX_FLAPPING_TIME);
+ }
+ if (!flapping_timer.check())
+ {
+ can_flap = false;
+ falling_from_flap = true;
+ }
+ jumping = true;
+ flapping = true;
+ if (flapping && flapping_timer.get_gone() <= TUX_FLAPPING_TIME
+ && physic.get_velocity_y() < 0)
+ {
+ float gravity = Sector::current()->gravity;
+ float xr = (fabsf(physic.get_velocity_x()) / MAX_RUN_XM);
+
+ // XXX: magic numbers. should be a percent of gravity
+ // gravity is (by default) -0.1f
+ physic.set_acceleration_y(.12 + .01f*xr);
+
+#if 0
+ // To slow down x-vel when flapping (not working)
+ if (fabsf(physic.get_velocity_x()) > MAX_WALK_XM)
+ {
+ if (physic.get_velocity_x() < 0)
+ physic.set_acceleration_x(1.0f);
+ else if (physic.get_velocity_x() > 0)
+ physic.set_acceleration_x(-1.0f);
+ }
+#endif
+ }
+ }
+ else
+ {
+ physic.set_acceleration_y(0);
+ }
+ */
+
+ // Hover
+ //(disabled by default, use cheat code "hover" to toggle on/off)
+ //TODO: needs some tweaking, especially when used together with double jump and jumping off badguys
+ if (enable_hover && input.jump == DOWN && !jumping && !butt_jump && physic.get_velocity_y() <= 0)
+ {
+ physic.set_velocity_y(-1);
+ }
+
+ /* In case the player has pressed Down while in a certain range of air,
+ enable butt jump action */
+ if (input.down == DOWN && !butt_jump && !duck)
+ if(tiles_on_air(TILES_FOR_BUTTJUMP) && jumping)
+ butt_jump = true;
+
+ /* When Down is not held anymore, disable butt jump */
+ if(butt_jump && input.down == UP)
+ butt_jump = false;
+
+ // Do butt jump
+ if (butt_jump && on_ground() && size == BIG)