// Convert all hotspots in the Hotspots game object into a JSON representation.
public void SaveJson()
{
var hotspotScene = new HotspotScene();
hotspotScene.hotspots = new HotspotSaveable[Controller.transform.childCount];
//Save position of each hotspot.
//The position is calculated in pixels from the leftmost surface.
for (int i = 0; i < hotspotScene.hotspots.Length; i++)
{
var child = Controller.transform.GetChild(i);
Vector3 screenPos = immersiveCamera.cameras[0].WorldToScreenPoint(child.position);
HotspotSaveable hotspot = new HotspotSaveable()
{
position = new Vector2(screenPos.x, screenPos.y),
name = child.name
};
hotspotScene.hotspots[i] = hotspot;
}
string json = JsonUtility.ToJson(hotspotScene);
print(json);
File.WriteAllText(Application.persistentDataPath + "/hotspots2.json", json);
#if UNITY_EDITOR
UnityEditor.AssetDatabase.Refresh();
#endif
}
private void LoadFromJSON()
{
//Load and Parse JSON
string json = File.ReadAllText(Application.persistentDataPath + "/hotspots2.json");
print(json);
HotspotScene hs = JsonUtility.FromJson <HotspotScene>(json);
GameObject hotspotHolder = GameObject.Find("Hotspots");
if (hotspotHolder == null)
{
hotspotHolder = new GameObject();
hotspotHolder.name = "Hotspots";
}
foreach (HotspotSaveable hotspot in hs.hotspots)
{
//Instantiate Hotspot
var hotspotObject = Instantiate(hotspotPrefab);
hotspotObject.transform.parent = hotspotHolder.transform;
// Works out which camera is associated with the surface hotspot appears on.
// Also provides the position of the hotspot on that surface in pixels.
var(cam, pos) = immersiveCamera.FindCameraFromScreenPosition(hotspot.position);
if (cam == null)
{
return;
}
//Make hotspot face camera
HotspotScript hotScript = hotspotObject.GetComponent <HotspotScript>();
// Cast ray through screen point and place hotspot 2 units from the camera.
Ray ray = cam.ScreenPointToRay(new Vector3(pos.x, pos.y));
hotspotObject.transform.position = ray.GetPoint(2);
}
}
