modular-vr/Assets/Desert/Runtime/Puzzle A/SymbolButton.cs

using EscapeRoomEngine.Engine.Runtime;
using UnityEngine;

namespace EscapeRoomEngine.Desert.Runtime.Puzzle_A
{
    [RequireComponent(typeof(MeshRenderer))]
    public class SymbolButton : Button
    {
        private static readonly int FresnelColor = Shader.PropertyToID("_FresnelColor");
        private static readonly int Color = Shader.PropertyToID("_Color");

        public EngineTheme theme;

        public override bool Pressed
        {
            get => base.Pressed;
            protected set
            {
                base.Pressed = value;
                
                var color =
                    Pressed ? theme.activeColor
                    : Active ? theme.puzzleColor
                    : theme.solvedColor;
                _material.SetColor(FresnelColor, color);
                _material.SetColor(Color, color);
            }
        }

        private Material _material;

        private void Start()
        {
            _material = GetComponent<MeshRenderer>().material;
        }
    }
}