public GameObject(Game game, Vector3 pos, BasicModel mdl, PhysicsObject pobj)
: base(game)
{
basicmodel = mdl;
physobj = pobj;
//Default values
setPosition(pos);
rotation = Quaternion.CreateFromYawPitchRoll(0, 0, 0);
scale = 1f;
world = Matrix.Identity;
}
private bool checkCollision(PhysicsObject p1, PhysicsObject p2)
{
if (p1.bsphere.Intersects(p2.bsphere))
return true;
return false;
}
public void addPhysicsObject(PhysicsObject pobj)
{
physobjs.Add(pobj);
}
public void addCollisionEvent(PhysicsObject p1, PhysicsObject p2)
{
int[] pindex = new int[2] {physobjs.IndexOf(p1), physobjs.IndexOf(p2)};
collisionEvents.Add(pindex); //Add list of physics objects to collision events
}
//There is an issue if p1 is moving perpendicularly to p.
private void resolveCollision(PhysicsObject p1, PhysicsObject p2)
{
Vector3 p = p1.position - p2.position;
float r1 = p1.bsphere.Radius;
float r2 = p2.bsphere.Radius;
float R = p.Length();
p.Normalize();
float vd = -Vector3.Dot(p, p1.velocity) + Vector3.Dot(p, p2.velocity);
float pd = 0; //Distance for each object to be moved
//To stop it from recolliding each frame, give objects a distance to move = penetration distance.
//Value is increased slightly to stop objects getting stuck to each other
if (p1.isStatic || p2.isStatic) //Move the non-static object the full distance
pd = 1.00f * Math.Abs(r1 + r2 - R);
else
pd = 0.50f * Math.Abs(r1 + r2 - R); //Move both objects half the distance
p1.velocity += 0.8f * vd * p;
p2.velocity += 0.8f * vd * -p;
if (!p1.isStatic)
{
p1.position += p * pd;
p2.velocity += 0.8f * vd * p;
}
if (!p2.isStatic)
{
p2.position += -p * pd;
p1.velocity += 0.8f * vd * -p;
}
}
//This method of handling the collisionEventType will be changed in the future. A collisionEvent will be an object of its own.
//The response to a registeredCollisionEvent will be handled manually as above.
private int collisionEventType(PhysicsObject[] pindex)
{
if (pindex.Contains(enemy.body.physobj) && pindex.Contains(player.fist.physobj)) return 0;
if (pindex.Contains(player.body.physobj) && pindex.Contains(enemy.fist.physobj)) return 1;
return -1;
}
/// <summary>
/// Create a PhysicsObject based on position and bounding sphere. This will exist in the GameWorld and does not need a BasicModel to be simulated.
/// </summary>
/// <param name="pos"></param>
/// <param name="bsphere"></param>
/// <returns></returns>
public PhysicsObject createPhysicsObject(Vector3 pos, BoundingSphere bsphere)
{
PhysicsObject pobj = new PhysicsObject(pos, bsphere);
physworld.addPhysicsObject(pobj);
return pobj;
}
