Sorry your browser is not supported!

	//only jump if on ground, and a certain time after last jump
	if ( ground == 1 ) 
	{
		if ( dbSpaceKey() == 1 && jumptimer == 0 ) 
		{
			vy = vy + 3.0f; //height of jump
			jumptimer = 20;
		}
	}
	
	//this would be the player's final position without collision
	float x = oldx + vx;
	float y = oldy + vy;
	float z = oldz + vz;
	
	//first handle gravity - seperated from horizontal movement
	//to achieve a more realistic effect
	//Method: simple - cast a sphere vertically down, if it hits the level then
	//                 position the object there (sticky collision) then move 
	//                 on to horizontal movement
	//  more complex - if we were to only use the simple method the player would be 
	//                 allowed to climb almost vertical slopes. Alternative is to
	//                 get the normalY direction to work out how flat the gorund
	//                 below the player is, 0-slope# is flatter, slope#-1 is steeper.
	//                 if it's flat, use sticky collision, if it's steep slide the
	//                 player down the slope. Changing slope# determines how steep the 
	//                 player can climb. NOTE: this also effects stairs.
	int collide = SC_SphereCastGroup(  1, oldx,oldy,oldz, oldx,oldy+vy,oldz, radius,0 );
	
	if ( collide > 0 )
	{
		//how flat is this ground
		float ny = SC_GetCollisionNormalY();
		if ( dbAbs(ny) > slope )
		{
			//FLAT, stick
			oldy = SC_GetStaticCollisionY();
		}
		else
		{
			//STEEP, slide
			x = x - oldx; z = z - oldz;
			oldx = SC_GetCollisionSlideX();
			oldy = SC_GetCollisionSlideY();
			oldz = SC_GetCollisionSlideZ();
			x = x + oldx; z = z + oldz;
		}
		
		//ny#<0 means the player has hit a ceiling rather than a floor
		
		if ( ny > slope )
		{

			//only on ground if standing on flat ground
			ground = 1;
			vy = 0;
		}
		else 
		{


			ground = 0;
			//if player has hit a flat ceiling then stop vy# movement
  			if ( ny < -slope) vy = gravity;
		}
	}
 	else
	{
		//nothing below player, not on ground, add vertical speed to player
		oldy = oldy + vy;
		ground = 0;
	}
	
	//jumptimer will decrease only when player is back on ground
	//creates a pause between two successive jumps
	if ( ground == 1 && jumptimer > 0 ) jumptimer--;
	
	//handle horizontal movement as sliding
	//player only collides with group 1 (level) objs and moves freely through others
	collide = SC_SphereSlideGroup(  1, oldx,oldy,oldz, x,oldy,z, radius,0 );
	
	if ( collide > 0 )
	{
		//if hit, reposition player, halt movement vector
		x = SC_GetCollisionSlideX();
		oldy = SC_GetCollisionSlideY();
		z = SC_GetCollisionSlideZ();
		vx = 0;
		vz = 0;
		
		//possible code for giving the player a jumping help up stairs...
		//might be useful if slope# is set very high but stairs are still required
		//int dy = oldy - SC_GetStaticCollisionY();
		//if ( dy < slope && dy > 0 && ground == 1 ) vy = 0.5;
		// not working ((unitech comment))
	}
	
	//position the player
	dbPositionObject( m_player.getID(),x,oldy,z );
	SC_UpdateObject( m_player.getID() );
}