/// <summary>
/// Initialises the component.
/// </summary>
public void Start()
{
this.planeZ = new Plane(Vector3.back, Vector3.zero);
// Get a refernce to the terrain's touchable component
GameObject terrain = GameObject.Find("Terrain");
this.terrainTouchable = terrain.GetComponent<TouchableComponent>();
}
/// <summary>
/// Get the component that lies at the given screen position.
/// </summary>
/// <param name="touchPosition">The screen position of the touch.</param>
/// <param name="touchable">The touchable component.</param>
/// <param name="hitPoint">The point at which the component was touched in world coordinates.</param>
/// <returns>The touchable component; Null if touchable object exists at the postion.</returns>
private bool TryGetTouchedComponent(Vector2 touchPosition, out TouchableComponent touchable, out Vector3 hitPoint)
{
// Cast a ray into the scene at the touched point
Ray ray = Camera.main.ScreenPointToRay(touchPosition);
// See if an actor was hit
// TODO
// No actors were hit. See where the ray hits the terrain on the Z = 0 plane
float distance;
if (this.planeZ.Raycast(ray, out distance))
{
touchable = this.terrainTouchable;
hitPoint = ray.GetPoint(distance);
return true;
}
touchable = null;
hitPoint = Vector3.zero;
return false;
}
