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34bec90 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | // Sets SceneWorld.gaze to the SceneItem the user points at, so "this" and "that" resolve: the object under the mouse
// pointer (flat screen) or at the centre of the camera (head gaze in XR). The objects need colliders. While the agent is
// answering, the gaze is left as it was, so the command sees what the user pointed at when they asked.
using System;
using UnityEngine;
namespace SceneAgent
{
public class SceneAgentGaze : MonoBehaviour
{
public enum Source { MousePointer, CameraCentre }
public SceneWorld world;
public SceneAgentSession session;
[Tooltip("Empty: Camera.main.")]
public Camera viewCamera;
[Tooltip("MousePointer falls back to the camera centre when the old Input Manager is off (Input System only).")]
public Source source = Source.MousePointer;
public float maxDistance = 30f;
/// <summary>The id the user points at now, or null.</summary>
public string Current { get; private set; }
void Update()
{
if (world == null) world = FindObjectOfType<SceneWorld>();
var cam = viewCamera != null ? viewCamera : Camera.main;
if (world == null || cam == null || (session != null && session.Busy)) return;
Ray ray = source == Source.MousePointer && TryMouse(out var p)
? cam.ScreenPointToRay(p) : cam.ViewportPointToRay(new Vector3(0.5f, 0.5f, 0f));
string id = null;
if (Physics.Raycast(ray, out var hit, maxDistance))
{
var it = hit.collider.GetComponentInParent<SceneItem>();
if (it != null && it.room == world.playerRoom) id = it.itemId;
}
Current = id;
world.gaze = id;
}
static bool TryMouse(out Vector3 p)
{
try { p = Input.mousePosition; return true; }
catch (InvalidOperationException) { p = default; return false; } // Input System only
}
}
}
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