private bool MissileToStatic(IMissile missile, IGameObject obj, CollisionParameters parameters)
{
//RemoveObject((IGameObject)missile);
if (!(missile is Grenade))
{
(missile as IGameObject).PhysicalData.Velocity = new MyVector(0, 0, 0);
SoundSystem.SoundEngine.PlaySound(SoundSystem.Enums.SoundTypes.arrowOff1, (Vector3)parameters.CollisionPoint);
}
else
{
GrenadeExplosion(missile as Grenade, parameters);
}
return false;
}
//private int ComputeDamage(CollisionParameters parameters)
//{
// return parameters.RelativeVelocity.Length*(parameters.A.Ma
//}
private bool OnCollision(CollisionParameters parameters)
{
IPhysicalObject o1 = parameters.A;
IPhysicalObject o2 = parameters.B;
if (o1 is IMissile && o2 is DestroyableObj)
return MissileToDestroyable(o1 as IMissile, o2 as DestroyableObj, parameters);
else if (o2 is IMissile && o1 is DestroyableObj)
return MissileToDestroyable(o2 as IMissile, o1 as DestroyableObj, parameters);
else if (o1 is DestroyableObj && o2 is DestroyableObj)
return DestroyableToDestroyable(o1 as DestroyableObj, o2 as DestroyableObj, parameters);
else if (o1 is IGameObject && o2 is DestroyableObj)
return DestroyableToStatic(o2 as DestroyableObj, o1 as IGameObject, parameters);
else if (o2 is IGameObject && o1 is DestroyableObj)
return DestroyableToStatic(o1 as DestroyableObj, o2 as IGameObject, parameters);
else if (o1 is IMissile && o2 is IGameObject)
return MissileToStatic(o1 as IMissile, o2 as IGameObject, parameters);
else if (o2 is IMissile && o1 is IGameObject)
return MissileToStatic(o2 as IMissile, o1 as IGameObject, parameters);
return true;
}
private void GrenadeExplosion(Grenade grenade, CollisionParameters parameters)
{
float maxDistance = grenade.ImpactDamage/4;
float impactDamage = grenade.ImpactDamage;
if (OnGrenadeHit != null)
OnGrenadeHit(grenade, parameters.CollisionPoint);
RemoveObject((IGameObject)grenade);
for (int i = 0; i < players.Count; i++)
{
if (players[i].IsAlive)
{
MyVector pos = players[i].CurrentCharacter.Position;
if ((pos - parameters.CollisionPoint).Length < maxDistance)
{
int damage = (int)(impactDamage * ((pos - parameters.CollisionPoint).Length / maxDistance));
players[i].OnMissileHit(grenade, parameters);
if (remote)
damage = 0;
if (players[i].CurrentCharacter.TakeDamage(damage))
{
((Character)grenade.Owner).Player.OnEnemyDestroyed(players[i]);
World.Instance.PlayerKilled(players[i]);
}
}
}
}
}
private bool MissileToDestroyable(IMissile missile, DestroyableObj obj, CollisionParameters parameters)
{
if (obj is Character && missile.Owner == obj)
return false;
if (missile is Grenade)
{
if(missile.Owner!=obj)
GrenadeExplosion(missile as Grenade, parameters);
}
else
{
int damage = missile.ImpactDamage;
if (obj is Character)
{
(obj as Character).Player.OnMissileHit(missile, parameters);
}
if (remote)
damage = 0;
if (obj.TakeDamage(damage))
{
if (obj is Character)
{
((Character)missile.Owner).Player.OnEnemyDestroyed((obj as Character).Player);
RemoveObject((IGameObject)missile);
World.Instance.PlayerKilled((obj as Character).Player);
}
else
{
RemoveObject((IGameObject)missile);
}
}
}
return false;
}
private bool DestroyableToDestroyable(DestroyableObj obj1, DestroyableObj obj2, CollisionParameters parameters)
{
//int damage = (int)Math.Abs(parameters.RelativeVelocity.Dot(parameters.CollisionNormal));
//obj1.TakeDamage(damage);
//obj2.TakeDamage(damage);
//if (obj1 is Ship)
//{
// (obj1 as Ship).Pilot.OnShipCollision(obj2 as Ship, parameters);
//}
//if (obj2 is Ship)
//{
// (obj2 as Ship).Pilot.OnShipCollision(obj1 as Ship, parameters);
//}
return false;
}
private bool DestroyableToStatic(DestroyableObj obj1, IGameObject obj2, CollisionParameters parameters)
{
if (obj1 is Character && obj2 is WeaponPickup)
{
if ((obj2 as WeaponPickup).Ready && ((obj1 as Character).CharacterClass.GameTeam ==
(obj2 as WeaponPickup).WeaponClass.GameTeam || (obj2 as WeaponPickup).WeaponClass.GameTeam == GameTeam.Both))
{
//zbieranie broni
(obj1 as Character).Weapons.AddWeapon((obj2 as WeaponPickup).WeaponClass);
(obj1 as Character).Player.OnWeaponPickup((obj2 as WeaponPickup));
(obj2 as WeaponPickup).Use();
}
return false;
}
else
{
if (obj1 is Character)
{
(obj1 as Character).Player.OnStaticCollision(obj2, parameters);
if (parameters.RelativeVelocity.Length > 100)
{
int damage = (int)parameters.RelativeVelocity.Length - 100;
if (obj1.TakeDamage(damage))
{
PlayerKilled((obj1 as Character).Player);
}
}
}
return true;
}
return false;
}
private void ResolveStaticToRigidBody(CollisionParameters parameters)
{
IPhysicalObject A = parameters.A;
RigidBody B = (RigidBody)parameters.B;
float cr = A.CoefficientOfRestitution * B.CoefficientOfRestitution;
float cf = A.FrictionCoefficient * B.FrictionCoefficient;
MyVector r2;
float j, Vrt;
r2 = parameters.CollisionPoint - B.Position;
RigidBodyData b2 = B.RigidBodyData;
cr *= (0.1f + 0.9f * Math.Abs(r2 * parameters.CollisionNormal) / (r2.Length));
cf *= (0.1f + 0.9f * Math.Abs(r2 * parameters.CollisionNormal) / (r2.Length));
j = (-(1f + cr) * (parameters.RelativeVelocity * parameters.CollisionNormal)) /
((1 / b2.Mass) +
(parameters.CollisionNormal * (((r2 ^ parameters.CollisionNormal) * b2.InertiaInverseGlobal) ^ r2)));
Vrt = parameters.RelativeVelocity * parameters.CollisionTangent;
if (Vrt != 0)
{
cf *= Vrt / parameters.RelativeVelocity.Length;
b2.Velocity -= ((j * parameters.CollisionNormal) + ((cf * j) * parameters.CollisionTangent)) / b2.Mass;
b2.AngularVelocity -= ((r2 ^ ((j * parameters.CollisionNormal) +
((cf * j) * parameters.CollisionTangent))) * b2.InertiaInverseGlobal).Rotate(~b2.Orientation);
}
else
{
b2.Velocity -= (j * parameters.CollisionNormal) / b2.Mass;
b2.AngularVelocity -= ((r2 ^ ((j * parameters.CollisionNormal))) *
b2.InertiaInverseGlobal).Rotate(~b2.Orientation);
}
B.RigidBodyData = b2;
}
private void ResolveStaticToPointMass(CollisionParameters parameters)
{
IPhysicalObject A = parameters.A;
PointMass B = (PointMass)parameters.B;
float cr = A.CoefficientOfRestitution * B.CoefficientOfRestitution;
float cf = A.FrictionCoefficient * B.FrictionCoefficient;
float j, Vrt;
PointMassData b2 = B.PointMassData;
bool tempMass = false;
if (b2.Mass == 0)
{
b2.Mass = 1;
tempMass = true;
}
j = (-(1f + cr) * (parameters.RelativeVelocity * parameters.CollisionNormal)) /
(1 / b2.Mass);
Vrt = parameters.RelativeVelocity * parameters.CollisionTangent;
if (Vrt != 0)
{
cf *= Vrt / parameters.RelativeVelocity.Length;
b2.Velocity -= ((j * parameters.CollisionNormal) + ((cf * j) * parameters.CollisionTangent)) / b2.Mass;
}
else
{
b2.Velocity -= (j * parameters.CollisionNormal) / b2.Mass;
}
if (tempMass)
{
b2.Mass = 0;
}
B.PointMassData = b2;
}
private void ResolveRigidBodyToRigidBody(CollisionParameters parameters)
{
RigidBody A = (RigidBody)parameters.A;
RigidBody B = (RigidBody)parameters.B;
float cr = A.CoefficientOfRestitution * B.CoefficientOfRestitution;
float cf = A.FrictionCoefficient * B.FrictionCoefficient;
MyVector r1, r2;
float j, Vrt;
r1 = parameters.CollisionPoint - A.Position;
r2 = parameters.CollisionPoint - B.Position;
RigidBodyData b1 = A.RigidBodyData;
RigidBodyData b2 = B.RigidBodyData;
j = (-(1f + cr) * (parameters.RelativeVelocity * parameters.CollisionNormal)) /
((1 / b1.Mass + 1 / b2.Mass) +
(parameters.CollisionNormal * (((r1 ^ parameters.CollisionNormal) * b1.InertiaInverseGlobal) ^ r1)) +
(parameters.CollisionNormal * (((r2 ^ parameters.CollisionNormal) * b2.InertiaInverseGlobal) ^ r2)));
Vrt = parameters.RelativeVelocity * parameters.CollisionTangent;
if (Vrt != 0)
{
//MyVector frictionImpulse;
cf *= Vrt / parameters.RelativeVelocity.Length;
b1.Velocity += ((j * parameters.CollisionNormal) + ((cf * j) * parameters.CollisionTangent)) / b1.Mass;
b1.AngularVelocity += ((r1 ^ ((j * parameters.CollisionNormal) +
((cf * j) * parameters.CollisionTangent))) * b1.InertiaInverseGlobal).Rotate(~b1.Orientation);
b2.Velocity -= ((j * parameters.CollisionNormal) + ((cf * j) * parameters.CollisionTangent)) / b2.Mass;
b2.AngularVelocity -= ((r2 ^ ((j * parameters.CollisionNormal) +
((cf * j) * parameters.CollisionTangent))) * b2.InertiaInverseGlobal).Rotate(~b2.Orientation);
}
else
{
b1.Velocity += (j * parameters.CollisionNormal) / b1.Mass;
b1.AngularVelocity += ((r1 ^ (j * parameters.CollisionNormal)) *
b1.InertiaInverseGlobal).Rotate(~b1.Orientation);
b2.Velocity -= ((j * parameters.CollisionNormal)) / b2.Mass;
b2.AngularVelocity -= ((r2 ^ (j * parameters.CollisionNormal)) *
b2.InertiaInverseGlobal).Rotate(~b2.Orientation);
}
A.RigidBodyData = b1;
B.RigidBodyData = b2;
}
private void ResolvePointMassToPointMass(CollisionParameters parameters)
{
PointMass A = (PointMass)parameters.A;
PointMass B = (PointMass)parameters.B;
float cr = A.CoefficientOfRestitution * B.CoefficientOfRestitution;
float cf = A.FrictionCoefficient * B.FrictionCoefficient;
MyVector r1, r2;
float j, Vrt;
r1 = parameters.CollisionPoint - A.Position;
r2 = parameters.CollisionPoint - B.Position;
PointMassData b1 = A.PointMassData;
PointMassData b2 = B.PointMassData;
j = (-(1f + cr) * (parameters.RelativeVelocity * parameters.CollisionNormal)) /
(1 / b1.Mass + 1 / b2.Mass);
Vrt = parameters.RelativeVelocity * parameters.CollisionTangent;
if (Vrt != 0)
{
//MyVector frictionImpulse;
cf *= Vrt / parameters.RelativeVelocity.Length;
b1.Velocity += ((j * parameters.CollisionNormal) + ((cf * j) * parameters.CollisionTangent)) / b1.Mass;
b2.Velocity -= ((j * parameters.CollisionNormal) + ((cf * j) * parameters.CollisionTangent)) / b2.Mass;
}
else
{
b1.Velocity += (j * parameters.CollisionNormal) / b1.Mass;
b2.Velocity -= ((j * parameters.CollisionNormal)) / b2.Mass;
}
A.PointMassData = b1;
B.PointMassData = b2;
}
public void ResolveCollision(CollisionParameters parameters)
{
IPhysicalObject A = parameters.A;
IPhysicalObject B = parameters.B;
//if (parameters.CollisionNormal * parameters.RelativeVelocity < 0)
// return;
if (A.Type == ObjectType.Static && B.Type == ObjectType.Static)
return;
if (A.Type == ObjectType.Static && B.Type == ObjectType.PointMass)
{
ResolveStaticToPointMass(parameters);
return;
}
if (B.Type == ObjectType.Static && A.Type == ObjectType.PointMass)
{
parameters.A = B;
parameters.B = A;
parameters.CollisionNormal = -parameters.CollisionNormal;
parameters.RelativeAcceleration = -parameters.RelativeAcceleration;
parameters.RelativeVelocity = -parameters.RelativeVelocity;
ResolveStaticToPointMass(parameters);
return;
}
if (A.Type == ObjectType.Static && B.Type == ObjectType.RigidBody)
{
ResolveStaticToRigidBody(parameters);
return;
}
if (B.Type == ObjectType.Static && A.Type == ObjectType.RigidBody)
{
parameters.A = B;
parameters.B = A;
parameters.CollisionNormal = -parameters.CollisionNormal;
parameters.RelativeAcceleration = -parameters.RelativeAcceleration;
parameters.RelativeVelocity = -parameters.RelativeVelocity;
ResolveStaticToRigidBody(parameters);
return;
}
if (A.Type == ObjectType.PointMass && B.Type == ObjectType.RigidBody)
{
ResolvePointMassToRigidBody(parameters);
return;
}
if (B.Type == ObjectType.PointMass && A.Type == ObjectType.RigidBody)
{
parameters.A = B;
parameters.B = A;
parameters.CollisionNormal = -parameters.CollisionNormal;
parameters.RelativeAcceleration = -parameters.RelativeAcceleration;
parameters.RelativeVelocity = -parameters.RelativeVelocity;
ResolvePointMassToRigidBody(parameters);
return;
}
if (A.Type == ObjectType.PointMass && B.Type == ObjectType.PointMass)
{
ResolvePointMassToPointMass(parameters);
return;
}
if (A.Type == ObjectType.RigidBody && B.Type == ObjectType.RigidBody)
{
ResolveRigidBodyToRigidBody(parameters);
return;
}
//float cr = A.CoefficientOfRestitution * B.CoefficientOfRestitution;
//float cf = A.FrictionCoefficient * B.FrictionCoefficient;
////in case of still-moving collision we assume that B is still
//if (A.Type == ObjectType.Static)
//{
// CollisionParameters p=parameters;
// p.A = parameters.B;
// p.B = parameters.A;
// p.CollisionNormal = -p.CollisionNormal;
// p.RelativeAcceleration = -p.RelativeAcceleration;
// p.RelativeVelocity = -p.RelativeVelocity;
// //ResolveCollision(p);
// //return;
//}
//MyVector r1,r2;
//float j,Vrt;
//if (B.Type == ObjectType.RigidBody)
//{
// //moving-moving collision
// r1 = parameters.CollisionPoint - A.Position;
// r2 = parameters.CollisionPoint - B.Position;
// RigidBodyData b1 = A.RigidBodyData;
// RigidBodyData b2 = B.RigidBodyData;
// j = (-(1f + cr) * (parameters.RelativeVelocity * parameters.CollisionNormal)) /
// ((1 / b1.Mass + 1 / b2.Mass) +
// (parameters.CollisionNormal * (((r1 ^ parameters.CollisionNormal) * b1.InertiaInverseGlobal) ^ r1)) +
// (parameters.CollisionNormal * (((r2 ^ parameters.CollisionNormal) * b2.InertiaInverseGlobal) ^ r2)));
// Vrt = parameters.RelativeVelocity * parameters.CollisionTangent;
// if (Vrt != 0)
// {
// MyVector frictionImpulse;
// cf *= Vrt / parameters.RelativeVelocity.Length;
// b1.Velocity += ((j * parameters.CollisionNormal) + ((cf * j) * parameters.CollisionTangent)) / b1.Mass;
// b1.AngularVelocity += ((r1 ^ ((j * parameters.CollisionNormal) +
// ((cf * j) * parameters.CollisionTangent))) * b1.InertiaInverseGlobal).Rotate(~b1.Orientation);
// b2.Velocity -= ((j * parameters.CollisionNormal) + ((cf * j) * parameters.CollisionTangent)) / b2.Mass;
// b2.AngularVelocity -= ((r2 ^ ((j * parameters.CollisionNormal) +
// ((cf * j) * parameters.CollisionTangent))) * b2.InertiaInverseGlobal).Rotate(~b2.Orientation);
// }
// else
// {
// b1.Velocity += (j * parameters.CollisionNormal) / b1.Mass;
// b1.AngularVelocity += ((r1 ^ (j * parameters.CollisionNormal))*
// b1.InertiaInverseGlobal).Rotate(~b1.Orientation);
// b2.Velocity -= ((j * parameters.CollisionNormal)) / b2.Mass;
// b2.AngularVelocity -= ((r2 ^ (j * parameters.CollisionNormal)) *
// b2.InertiaInverseGlobal).Rotate(~b2.Orientation);
// }
// A.RigidBodyData = b1;
// B.RigidBodyData = b2;
//}
//else
//{
// //moving-still collision
// r1 = parameters.CollisionPoint - A.Position;
// RigidBodyData b1 = A.RigidBodyData;
// j = (-(1f + cr) * (parameters.RelativeVelocity * parameters.CollisionNormal)) /
// ((1 / b1.Mass) +
// (parameters.CollisionNormal * (((r1 ^ parameters.CollisionNormal) * b1.InertiaInverseGlobal) ^ r1)));
// Vrt = parameters.RelativeVelocity * parameters.CollisionTangent;
// if (Vrt != 0)
// {
// cf *= Vrt / parameters.RelativeVelocity.Length;
// b1.Velocity += ((j * parameters.CollisionNormal) + ((cf * j) * parameters.CollisionTangent)) / b1.Mass;
// b1.AngularVelocity += ((r1 ^ ((j * parameters.CollisionNormal) +
// ((cf * j) * parameters.CollisionTangent))) * b1.InertiaInverseGlobal).Rotate(~b1.Orientation);
// }
// else
// {
// b1.Velocity += (j * parameters.CollisionNormal) / b1.Mass;
// b1.AngularVelocity += ((r1 ^ ((j * parameters.CollisionNormal))) *
// b1.InertiaInverseGlobal).Rotate(~b1.Orientation);
// }
// A.RigidBodyData = b1;
//}
}