public void TryEntityCollision(Component characterRootComponent)
{
CollisionUnit characterCollisionUnit = CollisionUnits.Find(unit => unit.RootComponent == characterRootComponent);
Component collidedRootComponent = null;
BoundBase characterBound = characterCollisionUnit.GetFirstBoundingBox();
List <BoundBase> collidedRootBounds = new List <BoundBase>();
bool bFrameBoundingBoxCollision = false, bRegularBoundingBoxCollision = false;
// Check Collision. Step 1 - check axis aligned framing bounding boxes for collision -- (PRE COLLISION)
CheckFrameBoundingBoxCollision(ref bFrameBoundingBoxCollision, ref characterRootComponent, ref characterCollisionUnit, ref collidedRootComponent, ref collidedRootBounds);
// Check Collision. Step 2 - check all bounding boxes of concrete component for collision -- (PURE COLLISION DETECTION)
List <BoundBase> collidedBounds = new List <BoundBase>();
CheckRegularBoundingBoxCollision(ref bRegularBoundingBoxCollision, ref characterRootComponent, ref collidedRootComponent, ref collidedRootBounds, ref characterBound, ref collidedBounds);
// Check Collision. Step 3 - Ray trace -- (BEHAVIOR OF COLLISION RESOLVING)
BehaviorManager.ProcessCollision(CollisionOutput);
// Clear all output after collision handling
CollisionOutput.Clear();
}
private void CheckFrameBoundingBoxCollision(ref bool bFrameBoundBoxCollision, ref Component characterRootComponent, ref CollisionUnit characterCollisionUnit,
ref Component collidedRootComponent, ref List <BoundBase> collidedRootBounds)
{
foreach (var unit in CollisionUnits)
{
if (characterCollisionUnit.RootComponent == unit.RootComponent)
{
continue;
}
AABB aabb1 = characterCollisionUnit.GetAndTryUpdateFramingBoundingBox();
AABB aabb2 = unit.GetAndTryUpdateFramingBoundingBox();
if (GeometryMath.AABBAABB(aabb1, aabb2))
{
bFrameBoundBoxCollision = true;
collidedRootComponent = aabb2.ParentComponent.GetRootComponent();
collidedRootBounds.AddRange(unit.GetBoundingBoxes());
}
}
if (bFrameBoundBoxCollision)
{
CollisionOutput.Add(new CollisionOutputFramingAABB(characterRootComponent, collidedRootComponent));
}
else
{
CollisionOutput.Add(new CollisionOutputNoCollided(characterRootComponent));
}
}
// when component's transform is changed notify bound boxes that they have to be changed
public void NotifyCollisionObserver(Component rootComponent)
{
CollisionUnit characterCollisionUnit = CollisionUnits.Find(unit => unit.RootComponent == rootComponent);
characterCollisionUnit.bBoundingBoxesTransformDirty = true;
}