void Awake()
{
// add our one-way platforms to our normal platform mask so that we can land on them from above
platformMask |= oneWayPlatformMask;
// cache some components
tfTransform = GetComponent <TFTransform>();
boxCollider = GetComponent <TFPolygonCollider>();
rigidBody2D = GetComponent <TFRigidbody>();
if (rigidBody2D)
{
rigidBody2D.OnTriggerEnter += TFOnTriggerEnter;
rigidBody2D.OnTriggerStay += TFOnTriggerStay;
rigidBody2D.OnTriggerExit += TFOnTriggerExit;
}
// here, we trigger our properties that have setters with bodies
skinWidth = _skinWidth;
// we want to set our CC2D to ignore all collision layers except what is in our triggerMask
for (var i = 0; i < 32; i++)
{
// see if our triggerMask contains this layer and if not ignore it
if ((triggerMask.mask & 1 << i) == 0)
{
Physics2D.IgnoreLayerCollision(gameObject.layer, i);
}
}
}
internal TFRaycastHit2D Raycast(ITreeRaycastCallback callback, FixVec2 pointA, FixVec2 pointB, TFLayerMask mask)
{
TFRaycastHit2D hit = new TFRaycastHit2D();
FixVec2 r = pointB - pointA;
if (r.GetMagnitudeSquared() <= Fix.zero)
{
return(hit);
}
r.Normalize();
// v is perpendicular to the segment.
FixVec2 v = FixVec2.Cross(Fix.one, r);
FixVec2 abs_v = FixVec2.Abs(v);
// Separating axis for segment (Gino, p80).
// |dot(v, p1 - c)| > dot(|v|, h)
Fix maxFraction = Fix.one;
// Build a bounding box for the segment.
AABB segmentAABB = new AABB();
FixVec2 t = pointA + maxFraction * (pointB - pointA);
segmentAABB.min = FixVec2.Min(pointA, t);
segmentAABB.max = FixVec2.Max(pointA, t);
Stack <int> stack = new Stack <int>();
stack.Push(rootIndex);
List <TFRaycastOutput> hitNodes = new List <TFRaycastOutput>(2);
while (stack.Count > 0)
{
var nodeId = stack.Pop();
if (nodeId == nullNode)
{
continue;
}
var node = nodes[nodeId];
if (!node.aabb.Overlaps(segmentAABB))
{
continue;
}
// Separating axis for segment (Gino, p80).
// |dot(v, p1 - c)| > dot(|v|, h)
var c = node.aabb.GetCenter();
var h = node.aabb.GetExtents();
var separation = FixMath.Abs(FixVec2.Dot(v, pointA - c)) - FixVec2.Dot(abs_v, h);
if (separation > Fix.zero)
{
continue;
}
if (node.IsLeaf())
{
// If value is >= 0, then we hit the node.
TFRaycastHit2D rHit;
Fix value = callback.RayCastCallback(pointA, pointB, maxFraction, nodeId, out rHit, mask);
if (value == Fix.zero)
{
// The client has terminated the ray cast.
if (rHit)
{
// We actually hit the node, add it to the list.
hitNodes.Add(new TFRaycastOutput(nodeId, rHit));
}
break;
}
if (value == maxFraction)
{
if (rHit)
{
// We actually hit the node, add it to the list.
hitNodes.Add(new TFRaycastOutput(nodeId, rHit));
}
}
else if (value > Fix.zero)
{
if (rHit)
{
// We actually hit the node, add it to the list.
hitNodes.Add(new TFRaycastOutput(nodeId, rHit));
}
// Update segment bounding box.
maxFraction = value;
FixVec2 g = pointA + maxFraction * (pointB - pointA);
segmentAABB.min = FixVec2.Min(pointA, g);
segmentAABB.max = FixVec2.Max(pointA, g);
}
}
else
{
stack.Push(node.leftChildIndex);
stack.Push(node.rightChildIndex);
}
}
// Decide which node was the closest to the starting point.
Fix closestNode = maxFraction;
for (int i = 0; i < hitNodes.Count; i++)
{
if (hitNodes[i].hit.fraction < closestNode)
{
closestNode = hitNodes[i].hit.fraction;
hit = hitNodes[i].hit;
}
}
return(hit);
}
public Fix RayCastCallback(FixVec2 pointA, FixVec2 pointB, Fix maxFraction, int proxyID, out TFRaycastHit2D hit, TFLayerMask mask)
{
TFRigidbody rigid = bodies[dynamicTree.nodes[proxyID].bodyIndex];
if (!(mask == (mask | (1 << rigid.layer))))
{
// This object is not in the mask, ignore it.
hit = new TFRaycastHit2D();
return(maxFraction);
}
rigid.coll.Raycast(out hit, pointA, pointB, maxFraction);
if (!hit)
{
// We did not hit the body, ignore it and use our max ray length.
return(maxFraction);
}
Fix fraction = hit.fraction;
FixVec2 point = (Fix.one - fraction) * pointA + fraction * pointB;
hit.point = point;
hit.distance = (point - pointA).GetMagnitude();
return(RayCastCallback(rigid, hit.point, hit.normal, hit.fraction));
}
public TFRaycastHit2D Raycast(FixVec2 origin, FixVec2 direction, Fix distance, TFLayerMask mask)
{
TFRaycastHit2D hit = dynamicTree.Raycast(this, origin, origin + direction * distance, mask);
return(hit);
}
public static TFRaycastHit2D Raycast(FixVec2 origin, FixVec2 direction, Fix distance, TFLayerMask mask)
{
TFRaycastHit2D hit = physicsScene.Raycast(origin, direction, distance, mask);
return(hit);
}