public virtual void find_walkable(SpherePath path, Sphere validPos, ref Polygon polygon, Vector3 movement, Vector3 up, ref bool changed)
{
if (!Sphere.Intersects(validPos))
{
return;
}
var dist = Vector3.Dot(SplittingPlane.Normal, validPos.Center) + SplittingPlane.D;
var reach = validPos.Radius - PhysicsGlobals.EPSILON;
if (dist >= reach)
{
PosNode.find_walkable(path, validPos, ref polygon, movement, up, ref changed);
return;
}
if (dist <= -reach)
{
NegNode.find_walkable(path, validPos, ref polygon, movement, up, ref changed);
return;
}
PosNode.find_walkable(path, validPos, ref polygon, movement, up, ref changed);
NegNode.find_walkable(path, validPos, ref polygon, movement, up, ref changed);
}
public TransitionState find_collisions(Transition transition, float scale)
{
var path = transition.SpherePath;
var collisions = transition.CollisionInfo;
var center = path.LocalSpaceCurrCenter[0].Center;
var localSphere = path.LocalSpaceSphere[0];
var movement = localSphere.Center - center;
if (path.InsertType == InsertType.Placement || path.ObstructionEthereal)
{
var clearCell = true;
if (path.BuildingCheck)
{
clearCell = !path.HitsInteriorCell;
}
if (RootNode.sphere_intersects_solid(localSphere, clearCell))
{
return(TransitionState.Collided);
}
else
{
return(TransitionState.OK);
}
}
if (path.CheckWalkable)
{
return(check_walkable(path, localSphere, scale));
}
if (path.StepDown)
{
return(step_sphere_down(transition, localSphere, scale));
}
Polygon hitPoly = null;
if (path.Collide)
{
var changed = false;
var validPos = new Sphere(localSphere);
RootNode.find_walkable(path, validPos, ref hitPoly, movement, path.LocalSpaceZ, ref changed);
if (changed)
{
var offset = validPos.Center - localSphere.Center;
var collisionNormal = path.LocalSpacePos.LocalToGlobalVec(offset) * scale;
path.AddOffsetToCheckPos(collisionNormal);
var contactPlane = hitPoly.Plane.LocalToGlobal(path.CheckPos, path.LocalSpacePos, hitPoly.Plane);
contactPlane.D *= scale;
collisions.SetContactPlane(contactPlane, false);
collisions.ContactPlaneCellID = path.CheckPos.ObjCellID;
path.SetWalkable(validPos, hitPoly, path.LocalSpaceZ, path.LocalSpacePos, scale);
return(TransitionState.Adjusted);
}
else
{
return(TransitionState.OK);
}
}
var contactPoint = Vector3.Zero;
var obj = transition.ObjectInfo;
if (obj.State.HasFlag(ObjectInfoState.Contact))
{
if (RootNode.sphere_intersects_poly(localSphere, movement, ref hitPoly, ref contactPoint))
{
return(step_sphere_up(transition, hitPoly.Plane.Normal));
}
if (path.NumSphere > 1)
{
Polygon hitPoly_ = null;
var localSphere_ = path.LocalSpaceSphere[1];
if (RootNode.sphere_intersects_poly(localSphere_, movement, ref hitPoly_, ref contactPoint))
{
return(slide_sphere(transition, hitPoly_.Plane.Normal));
}
if (hitPoly_ != null)
{
return(NegPolyHit(path, hitPoly_, false));
}
if (hitPoly != null)
{
return(NegPolyHit(path, hitPoly, true));
}
}
return(TransitionState.OK);
}
if (RootNode.sphere_intersects_poly(localSphere, movement, ref hitPoly, ref contactPoint) || hitPoly != null)
{
if (obj.State.HasFlag(ObjectInfoState.PathClipped))
{
return(collide_with_pt(transition, localSphere, center, hitPoly, contactPoint, scale));
}
var collisionNormal = path.LocalSpacePos.LocalToGlobalVec(hitPoly.Plane.Normal);
path.WalkableAllowance = PhysicsGlobals.LandingZ;
path.SetCollide(collisionNormal);
return(TransitionState.Adjusted);
}
else if (path.NumSphere > 1)
{
var localSphere_ = path.LocalSpaceSphere[1];
if (RootNode.sphere_intersects_poly(localSphere_, movement, ref hitPoly, ref contactPoint) || hitPoly != null)
{
var collisionNormal = path.LocalSpacePos.LocalToGlobalVec(hitPoly.Plane.Normal);
collisions.SetCollisionNormal(collisionNormal);
return(TransitionState.Collided);
}
}
return(TransitionState.OK);
}