public bool move( Vector2 motion, out CollisionResult collisionResult )
{
collisionResult = new CollisionResult();
// no collider? just move and forget about it
if( entity.getComponent<Collider>() == null || _triggerHelper == null )
{
entity.transform.position += motion;
return false;
}
// 1. move all non-trigger Colliders and get closest collision
var colliders = entity.getComponents<Collider>();
for( var i = 0; i < colliders.Count; i++ )
{
var collider = colliders[i];
// skip triggers for now. we will revisit them after we move.
if( collider.isTrigger )
continue;
// fetch anything that we might collide with at our new position
var bounds = collider.bounds;
bounds.x += motion.X;
bounds.y += motion.Y;
var neighbors = Physics.boxcastBroadphaseExcludingSelf( collider, ref bounds, collider.collidesWithLayers );
foreach( var neighbor in neighbors )
{
// skip triggers for now. we will revisit them after we move.
if( neighbor.isTrigger )
continue;
if( collider.collidesWith( neighbor, motion, out collisionResult ) )
{
// hit. back off our motion
motion -= collisionResult.minimumTranslationVector;
}
}
}
ListPool<Collider>.free( colliders );
// 2. move entity to its new position if we have a collision else move the full amount. motion is updated when a collision occurs
entity.transform.position += motion;
// 3. do an overlap check of all Colliders that are triggers with all broadphase colliders, triggers or not.
// Any overlaps result in trigger events.
_triggerHelper.update();
return collisionResult.collider != null;
}
}
