public static bool RaycastTerrain(this GameObject gameObject, Ray ray, out GameObjectRayHit objectRayHit)
{
objectRayHit = null;
if (!gameObject.HasTerrain())
{
return(false);
}
TerrainCollider terrainCollider = gameObject.GetComponent <TerrainCollider>();
if (terrainCollider == null)
{
return(false);
}
RaycastHit raycastHit;
if (terrainCollider.Raycast(ray, out raycastHit, float.MaxValue))
{
TerrainRayHit terrainRayHit = new TerrainRayHit(ray, raycastHit);
objectRayHit = new GameObjectRayHit(ray, gameObject, null, null, terrainRayHit, null);
}
return(objectRayHit != null);
}
private void RaycastAllTerrainObjects(Ray ray, List <GameObjectRayHit> terrainHits)
{
// Can we pick terrains?
if (!IsObjectPickMaskFlagSet(MouseCursorObjectPickFlags.ObjectTerrain))
{
// We will use Unity's 'Physics' API for terrain picking because it is reasonable enough
// to expect users to attach terrain colliders to their terrain objects.
RaycastHit[] rayHits = Physics.RaycastAll(ray);
if (rayHits.Length != 0)
{
// Identify all terrain colliders which were picked
foreach (RaycastHit rayHit in rayHits)
{
// Picked a terrain collider?
if (rayHit.collider.GetType() == typeof(TerrainCollider))
{
// Create a game object hit instance and add it to the list
var terrainRayHit = new TerrainRayHit(ray, rayHit);
var gameObjectRayHit = new GameObjectRayHit(ray, rayHit.collider.gameObject, null, null, terrainRayHit, null);
terrainHits.Add(gameObjectRayHit);
}
}
}
}
}
public GameObjectRayHit(Ray ray, GameObject hitObject, OrientedBoxRayHit objectBoxHit, MeshRayHit objectMeshHit, TerrainRayHit objectTerrainHit, SpriteRayHit objectSpriteHit)
{
_ray = ray;
_hitObject = hitObject;
// Only one kind of entity can be registered as a hit, so we will take the first
// non-null hit instance using the following priority: terrain, mesh, sprite, box.
if (objectTerrainHit != null)
{
_objectTerrainHit = objectTerrainHit;
_objectBoxHit = null;
_objectMeshHit = null;
_objectSpriteHit = null;
}
else
if (objectMeshHit != null)
{
_objectTerrainHit = null;
_objectBoxHit = null;
_objectMeshHit = objectMeshHit;
_objectSpriteHit = null;
}
else
if (objectSpriteHit != null)
{
_objectTerrainHit = null;
_objectBoxHit = null;
_objectMeshHit = null;
_objectSpriteHit = objectSpriteHit;
}
if (objectBoxHit != null)
{
_objectTerrainHit = null;
_objectBoxHit = objectBoxHit;
_objectMeshHit = null;
_objectSpriteHit = null;
}
}