aswi2021virtual-surreality-gitlab/deltarobot-vr/Assets/DeltaRobotVr/Components/AbstractArrow.cs @ 84cf5509

using UnityEngine;

namespace DeltaRobotVr.Components
{
    /// <summary>
    /// A generic implementation of vector visualization. The vector is determined by the <c>GetVector</c> method.
    /// </summary>
    public abstract class AbstractArrow : MonoBehaviour
    {
        public float lengthMultiplier = 2;
        protected Renderer objectRenderer;

        private void Start()
        {
            objectRenderer = GetComponent<Renderer>();
        }

        void Update()
        {
            if (Client.Instance.IsConnected)
            {
                Vector3 v = Single3Utils.ToVector3(GetVector());
                
                var t = transform;
                var zs = v.magnitude * lengthMultiplier;
                t.rotation = Quaternion.FromToRotation(Vector3.forward, v);
                t.localScale = new Vector3(1, 1, zs);
                
                // If scale is 0, hide arrow
                // Seems fine without delta
                if (objectRenderer.enabled == (zs == 0.0f))
                {
                    objectRenderer.enabled = !(zs == 0.0f);
                }
            }
        }

        /// <summary>
        /// Gets the vector that this component renders.
        /// </summary>
        protected abstract Single3 GetVector();
    }
}