/// <summary>
/// Similar to RayCast() but all intersections, not just the nearest one, is processed and
/// added to the passed in list of ray hits. Said list is not sorted by distance. If you
/// require a sorted list you must do this yourself in the calling function.
/// Returns true if at least one geom is intersected.
/// </summary>
/// <param name="ray">Ray</param>
/// <param name="rayHits">List of Ray Hits</param>
/// <param name="collisionGroup">Collision Group</param>
/// <param name="tmax">Max Ray Distance</param>
/// <returns>If any geoms are intersected</returns>
public bool RayCastAll(gxtRay ray, out List<gxtRayHit> rayHits, gxtCollisionGroup collisionGroup = gxtCollisionGroup.ALL, float tmax = float.MaxValue)
{
rayHits = new List<gxtRayHit>();
if (collisionGroup == gxtCollisionGroup.NONE)
return false;
List<gxtGeom> geoms = broadphaseCollider.RayCastAll(ray, tmax);
if (geoms.Count == 0)
return false;
// variables in ray hit
float t;
Vector2 pt, normal;
for (int i = 0; i < geoms.Count; i++)
{
if (CanCollide(collisionGroup, geoms[i]))
{
if (gxtGJKCollider.RayCast(ray, geoms[i].Polygon, tmax, out t, out pt, out normal))
{
gxtRayHit rayHit = new gxtRayHit();
rayHit.Intersection = true;
rayHit.Distance = t;
rayHit.Normal = normal;
rayHit.Point = pt;
rayHit.Geom = geoms[i];
rayHits.Add(rayHit);
}
}
}
return rayHits.Count > 0;
}
/// <summary>
///
/// </summary>
/// <param name="ray">Ray</param>
/// <param name="rayHits">List of Ray Hits</param>
/// <param name="collisionGroupName">Collision Group</param>
/// <param name="tmax">Max Ray Distance</param>
/// <returns></returns>
public bool RayCastAll(gxtRay ray, out List<gxtRayHit> rayHits, string collisionGroupName, float tmax = float.MaxValue)
{
gxtDebug.Assert(collisionGroupsMap.ContainsKey(collisionGroupName), "Named Collision Group: {0} Does Not Exist In Physics World");
gxtCollisionGroup cgroup = collisionGroupsMap[collisionGroupName];
return RayCastAll(ray, out rayHits, cgroup, tmax);
}
/// <summary>
/// Casts a ray into the world with the given max distance and collision filter
/// Packages the nearest hit object and information on the ray cast into the rayHit structure
/// Returns true if an object is intersected by the ray, false otherwise
/// </summary>
/// <param name="ray">Ray</param>
/// <param name="rayHit">Ray Hit</param>
/// <param name="tmax">Max Ray Distance</param>
/// <param name="collisionGroup">Collision Groups</param>
/// <returns>If an object was hit</returns>
public bool RayCast(gxtRay ray, out gxtRayHit rayHit, gxtCollisionGroup collisionGroup = gxtCollisionGroup.ALL, float tmax = float.MaxValue)
{
rayHit = new gxtRayHit();
if (collisionGroup == gxtCollisionGroup.NONE)
return false;
List<gxtGeom> geoms = broadphaseCollider.RayCastAll(ray, tmax, true);
if (geoms.Count == 0)
return false;
float t;
float minDist = tmax;
Vector2 pt, normal;
for (int i = 0; i < geoms.Count; i++)
{
if (CanCollide(collisionGroup, geoms[i]))
{
if (gxtGJKCollider.RayCast(ray, geoms[i].Polygon, tmax, out t, out pt, out normal))
{
if (t <= minDist)
{
rayHit.Intersection = true;
rayHit.Distance = t;
rayHit.Normal = normal;
rayHit.Point = pt;
rayHit.Geom = geoms[i];
minDist = t;
}
}
}
}
return rayHit.Intersection;
}