private void UpdateTransform(Entity playerShield)
{
PlayerShieldComponent shieldComp = playerShield.GetComponent <PlayerShieldComponent>();
if (shieldComp.ShipEntity == null)
{
return;
}
if (!playerShipFamily.Matches(shieldComp.ShipEntity))
{
throw new Exception("Player shield does not have a valid ship entity within PlayerShieldComponent.");
}
Entity playerShip = shieldComp.ShipEntity;
TransformComponent shieldTransformComp = playerShield.GetComponent <TransformComponent>();
TransformComponent shipTransformComp = playerShip.GetComponent <TransformComponent>();
Vector2 shieldTargetPosition = shipTransformComp.Position
+ new Vector2((float)(shieldComp.Radius * Math.Cos(shieldComp.Angle)),
(float)(shieldComp.Radius * Math.Sin(shieldComp.Angle)));
shieldTransformComp.Move(shieldTargetPosition - shieldTransformComp.Position);
Vector2 shieldToShip = shieldTargetPosition - shipTransformComp.Position;
float targetRotation = (float)Math.Atan2(shieldToShip.Y, shieldToShip.X) + (float)(Math.PI / 2); // PI/2 because sprite is rotated 90deg wrong
shieldTransformComp.Rotate(targetRotation - shieldTransformComp.Rotation);
}
private void UpdateAngleFromInput(Entity playerShield)
{
PlayerShieldComponent shieldComp = playerShield.GetComponent <PlayerShieldComponent>();
PlayerComponent playerComp = playerShield.GetComponent <PlayerShieldComponent>().ShipEntity.GetComponent <PlayerComponent>();
if (playerComp != null)
{
shieldComp.Angle = playerComp.Player.InputMethod.GetSnapshot().Angle - shieldComp.Offset;
}
}
public override void Update(float dt)
{
foreach (Entity playerShieldEntity in playerShieldEntities)
{
TransformComponent transformComp = playerShieldEntity.GetComponent <TransformComponent>();
PlayerShieldComponent shieldComp = playerShieldEntity.GetComponent <PlayerShieldComponent>();
if (shieldComp.ShipEntity == null)
{
return;
}
if (!playerShipFamily.Matches(shieldComp.ShipEntity))
{
throw new Exception("Player shield does not have a valid ship entity within PlayerShieldComponent.");
}
Entity playerShip = shieldComp.ShipEntity;
TransformComponent shipTransformComp = playerShip.GetComponent <TransformComponent>();
Vector2 shieldNormal = transformComp.Position - shipTransformComp.Position;
shieldNormal.Normalize();
Vector2 shieldTangent = new Vector2(-shieldNormal.Y, shieldNormal.X);
foreach (Entity collisionEntity in collisionEntities)
{
TransformComponent collisionTransformComp = collisionEntity.GetComponent <TransformComponent>();
CollisionComponent collisionComp = collisionEntity.GetComponent <CollisionComponent>();
Vector2[] collisionEntityCorners =
{
new Vector2(-collisionComp.BoundingBoxComponent.Width / 2, -collisionComp.BoundingBoxComponent.Height / 2),
new Vector2(-collisionComp.BoundingBoxComponent.Width / 2, collisionComp.BoundingBoxComponent.Height / 2),
new Vector2(collisionComp.BoundingBoxComponent.Width / 2, collisionComp.BoundingBoxComponent.Height / 2),
new Vector2(collisionComp.BoundingBoxComponent.Width / 2, -collisionComp.BoundingBoxComponent.Height / 2)
};
bool colliding = false;
foreach (Vector2 collisionCorner in collisionEntityCorners)
{
Vector2 shieldCenterToCorner = transformComp.Position - (collisionCorner + collisionTransformComp.Position);
// Cast center-to-corner onto normal and tangent
float normalCasted = Vector2.Dot(shieldCenterToCorner, shieldNormal);
float tangentCasted = Vector2.Dot(shieldCenterToCorner, shieldTangent);
colliding = colliding || Math.Abs(normalCasted) <= shieldComp.Bounds.Y && Math.Abs(tangentCasted) <= shieldComp.Bounds.X;
}
if (colliding)
{
if (!collisionComp.collidingWith.Contains(playerShieldEntity))
{
collisionComp.collidingWith.Add(playerShieldEntity);
EventManager.Instance.QueueEvent(new CollisionStartEvent(playerShieldEntity, collisionEntity));
}
}
else
{
if (collisionComp.collidingWith.Contains(playerShieldEntity))
{
collisionComp.collidingWith.Remove(playerShieldEntity);
EventManager.Instance.QueueEvent(new CollisionEndEvent(playerShieldEntity, collisionEntity));
}
}
}
}
}
