DataStudy/Assets/Plugins/ZFBrowser/Scripts/BrowserUI/CursorRendererWorldSpace.cs

using UnityEngine;

namespace ZenFulcrum.EmbeddedBrowser {

/// <summary>
/// Renders a browser's cursor by add polygons to the scene offset from browser's face.
/// </summary>
public class CursorRendererWorldSpace : CursorRendererBase {
	[Tooltip("How far to keep the cursor from the surface of the browser. Set it as low as you can without causing z-fighting." +
" (Note: The default cursor material will always render on top of everything, this is more useful if you use a different material.")]
	public float zOffset = .005f;
	[Tooltip("How large should the cursor be when rendered? (meters)")]
	public float size = .1f;

	private GameObject cursorHolder, cursorImage;
	private PointerUIBase pointerUI;

	private bool cursorVisible;

	public void Awake() {

		pointerUI = GetComponent<PointerUIBase>();

		cursorHolder = new GameObject("Cursor for " + name);
		cursorHolder.transform.localScale = new Vector3(size, size, size);

		//If we place it in the parent, the scale can get wonky in some cases.
		//so don't cursorHolder.transform.parent = transform;

		cursorImage = GameObject.CreatePrimitive(PrimitiveType.Quad);
		cursorImage.name = "Cursor Image";
		cursorImage.transform.parent = cursorHolder.transform;
		var mr = cursorImage.GetComponent<MeshRenderer>();
		mr.sharedMaterial = Resources.Load<Material>("Browser/CursorDecal");
		Destroy(cursorImage.GetComponent<Collider>());
		cursorImage.transform.SetParent(cursorHolder.transform, false);
		cursorImage.transform.localScale = new Vector3(1, 1, 1);


		cursorHolder.SetActive(false);
	}

	protected override void CursorChange() {
		if (cursor.HasMouse && cursor.Texture) {
			cursorVisible = true;

			var cursorRenderer = cursorImage.GetComponent<Renderer>();
			cursorRenderer.material.mainTexture = cursor.Texture;

			var hs = cursor.Hotspot;
			cursorRenderer.transform.localPosition = new Vector3(
				.5f - hs.x / cursor.Texture.width,
				-.5f + hs.y / cursor.Texture.height,
				0
			);
		} else {
			cursorVisible = false;
		}
	}

	public void LateUpdate() {
		Vector3 pos;
		Quaternion rot;
		pointerUI.GetCurrentHitLocation(out pos, out rot);

		if (float.IsNaN(pos.x)) {
			cursorHolder.SetActive(false);
		} else {
			cursorHolder.SetActive(cursorVisible);

			cursorHolder.transform.position = pos + rot * new Vector3(0, 0, -zOffset);
			cursorHolder.transform.rotation = rot;
		}
	}
}

}