BEPUphysics

Code: Select all

		public override void update(float dt)
		{
			base.update(dt);

			Projectile[] ps = projectiles.Data;

			for (int i = 0; i < projectiles.Used; )
			{
				// if projectile has been terminated, or it has exceeded the "safe" projectile time allowance, kill it off
				if (ps[i].terminate == true || ps[i].survival_time <= ps[i].age)
				{
					ps[i].clear();
					projectiles.swapRemove(i);
				}
				else
				{
					ps[i].nextStep(dt);
					i++;
				}
			}

			this.physics_component.projectileRayCast(projectiles, this.Callbacks.ProjectileRayCast);
		}

Code: Select all

	/// <summary>
	/// An extension of the BEPU physics class Space, with some game-specific methods which are much faster if it has access to the guts of BEPU
	/// </summary>
	public class CustomBepuSpace : Space
	{
		protected Ray r_Ray;
		
		protected List<RayCastResult> r_List_RayCastResult = new List<RayCastResult>(1024);
		public void projectileRayCast(ObjectPool<Projectile> projectiles, ProjectileRayCastCallback callback)
		{
			if (callback == null)
				throw new Exception("It is expected that the callback is not null");

			// exit early if presented with empty set of projectiles
			if(projectiles.Used == 0)
				goto safe_return;

			for (int i = 0; i < projectiles.Used; i++)
			{
				Projectile p = projectiles.Data[i];
				
				// TG_TODO: make this work along the lines of the projectile's current and last position
				// this means refactoring projectile somewhat
				r_Ray.Position = p.current_position;
				r_Ray.Direction = p.current_velocity * (1f / 60f);

				// get a list of broadphase raycast results
				this.RayCast(r_Ray, 1f, r_List_RayCastResult);

				foreach (var result in r_List_RayCastResult)
				{
					PhysicsObjectTag tag = null;
					if ((tag = result.HitObject.Tag as PhysicsObjectTag) != null)
					{
						if (callback != null)
						{
							if (!callback(tag, p))
								goto skip_projectile;
						}
					}
				}
				skip_projectile:
				r_List_RayCastResult.Clear();
			}

			safe_return:
			
			r_List_RayCastResult.Clear();
		}