www.pudn.com > IntroductionTo3DGameEngineDesign.rar > Car.cs

using System; 
using System.Diagnostics; 
using Microsoft.DirectX; 
using GameEngine; 
using GameAI; 
using VehicleDynamics; 
 
namespace SampleGame 
{ 
	/// 
 
	/// Summary description for Car. 
	/// 
 
	public class Car : Model 
	{ 
		#region Attributes 
		private CarDynamics m_dynamics; 
		private float steering_wheel = 0.0f; 
		private float brake_pedal = 0.0f; 
		private float gas_pedal = 0.0f; 
		private float terrain_limit = 2000.0f; 
		#endregion 
 
		#region Properties 
		public CarDynamics Dynamics { get { return m_dynamics; } } 
		public float Steering { set { steering_wheel = value; } get { return steering_wheel; } } 
		public float Brake { set { brake_pedal = value; } get { return brake_pedal; } } 
		public float Gas { set { gas_pedal = value; } get { return gas_pedal; } } 
		public override float   North    { get { return m_vPosition.Z; } set { m_vPosition.Z = value; m_dynamics.North = value; m_bHasMoved = true;} } 
		public override float   East     { get { return m_vPosition.X; } set { m_vPosition.X = value; m_dynamics.East = value; m_bHasMoved = true;} } 
		public override float   Height   { get { return m_vPosition.Y; } set { m_vPosition.Y = value; m_dynamics.Height = value; m_bHasMoved = true;} } 
		public override float   Roll     { get { return m_vOrientation.Roll; } set { m_vOrientation.Roll = value; m_dynamics.Roll = value; } } 
		public override float   Pitch    { get { return m_vOrientation.Pitch; } set { m_vOrientation.Pitch = value; m_dynamics.Pitch = value; } } 
		public override float   Heading  { get { return m_vOrientation.Heading; } set { m_vOrientation.Heading = value; m_dynamics.Heading = value; } } 
		public int MPH { get { return (int)(m_dynamics.MPH); } } 
		public int RPM { get { return (int)(m_dynamics.EngineRPM); } } 
		public double ForwardVelocity { get { return m_dynamics.ForwardVelocity; } } 
		public double SidewaysVelocity { get { return m_dynamics.SidewaysVelocity; } } 
		public bool Driving {  
			set {  
				if ( value ) m_dynamics.Gear = CarDynamics.GearState.Drive; 
				else m_dynamics.Gear = CarDynamics.GearState.Park; 
			}  
		} 
		#endregion 
 
		public Car(string name, string meshFile, Vector3 offset, Attitude adjust )  
			: base (name, meshFile, offset, adjust) 
		{ 
			m_dynamics = new CarDynamics(); 
 
			// start the engine 
//			m_dynamics.Gear = CarDynamics.GearState.Park; 
			m_dynamics.Ignition = CarDynamics.IgnitionState.IgnitionStart; 
			m_dynamics.Gear = CarDynamics.GearState.Drive; 
		} 
		public override void Update( float DeltaT ) 
		{ 
//			System.Diagnostics.Debug.WriteLine("car update"); 
 
			m_dynamics.Brake = brake_pedal; 
			m_dynamics.SteeringWheel = steering_wheel; 
			m_dynamics.Throttle = gas_pedal; 
 
			float tire_north = m_dynamics.WheelNorth(WhichWheel.LeftFront) + North; 
			float tire_east  = m_dynamics.WheelEast(WhichWheel.LeftFront) + East; 
			float tire_altitude = CGameEngine.Ground.TerrainHeight( tire_east, tire_north ); 
			m_dynamics.SetWheelAltitude( WhichWheel.LeftFront, tire_altitude ); 
//			GameEngine.Console.AddLine( Name + " LeftFront height " + tire_altitude + " at n="+tire_north+" e="+tire_east); 
 
			tire_north = m_dynamics.WheelNorth(WhichWheel.LeftRear) + North; 
			tire_east  = m_dynamics.WheelEast(WhichWheel.LeftRear) + East; 
			tire_altitude = CGameEngine.Ground.TerrainHeight( tire_east, tire_north ); 
			m_dynamics.SetWheelAltitude( WhichWheel.LeftRear, tire_altitude ); 
//			GameEngine.Console.AddLine( Name + " LeftRear height " + tire_altitude + " at n="+tire_north+" e="+tire_east); 
 
			tire_north = m_dynamics.WheelNorth(WhichWheel.RightRear) + North; 
			tire_east  = m_dynamics.WheelEast(WhichWheel.RightRear) + East; 
			tire_altitude = CGameEngine.Ground.TerrainHeight( tire_east, tire_north ); 
			m_dynamics.SetWheelAltitude( WhichWheel.RightRear, tire_altitude ); 
//			GameEngine.Console.AddLine( Name + " RightRear height " + tire_altitude + " at n="+tire_north+" e="+tire_east); 
 
			tire_north = m_dynamics.WheelNorth(WhichWheel.RightFront) + North; 
			tire_east  = m_dynamics.WheelEast(WhichWheel.RightFront) + East; 
			tire_altitude = CGameEngine.Ground.TerrainHeight( tire_east, tire_north ); 
			m_dynamics.SetWheelAltitude( WhichWheel.RightFront, tire_altitude ); 
//			GameEngine.Console.AddLine( Name + " RightFront height " + tire_altitude + " at n="+tire_north+" e="+tire_east); 
 
			if ( (float)m_dynamics.North > 10.0 && (float)m_dynamics.North < (terrain_limit-10.0f) ) 
			{ 
				m_vPosition.Z = (float)m_dynamics.North; 
			} 
			else 
			{ 
				m_dynamics.North = m_vPosition.Z; 
			} 
			if ( (float)m_dynamics.East > 10.0 && (float)m_dynamics.East < (terrain_limit-10.0f) ) 
			{ 
				m_vPosition.X  = (float)m_dynamics.East; 
			} 
			else 
			{ 
				m_dynamics.East = m_vPosition.X; 
			} 
 
			Heading = (float)m_dynamics.Heading; 
			Pitch   = (float)m_dynamics.Pitch; 
			Roll    = (float)m_dynamics.Roll; 
 
			base.VelocityX = (float)m_dynamics.EastVelocity; 
			base.VelocityZ = (float)m_dynamics.NorthVelocity; 
			base.VelocityY = (float)m_dynamics.VerticalVelocity; 
 
			m_bHasMoved = true; 
 
			base.Update( DeltaT ); 
		} 
 
		public override void Dispose() 
		{ 
			Debug.WriteLine("Disposing of " + Name + " in Car"); 
			m_dynamics.Dispose(); 
			base.Dispose(); 
		} 
	} 
}