voxel/Player.cs

using OpenTK.Mathematics;
using OpenTK.Windowing.GraphicsLibraryFramework;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace Voxel
{
    public class Player
    {
        public Vector3 Position;

        private World _world;
        public double lastClick = 0;
        public readonly float mouseCooldown = 0.2f;

        public Player(World world, Vector3 startPos)
        {
            _world = world;
        }

        public void PlaceBlock()
        {
            var (success, hit, x, y, z, normal) = _world.Raycast(Camera.Position, Camera.Front.Normalized(), 10);
            if (!success) return;

            x += normal.X;
            y += normal.Y;
            z += normal.Z;

            _world.SetBlock(x, y, z, Blocks.OakPlanks);
        }

        public void BreakBlock()
        {
            var (success, hit, x, y, z, normal) = _world.Raycast(Camera.Position, Camera.Front.Normalized(), 10);
            if (!success) return;

            _world.SetBlock(x, y, z, Blocks.Air);
        }

        public void Update(float deltaTime)
        {
            Camera.Update(deltaTime);

            if (lastClick > 0)
            {
                lastClick -= deltaTime;
                if (lastClick < 0) lastClick = 0;
            }

            if (!Input.GetMouseButton(MouseButton.Right) && !Input.GetMouseButton(MouseButton.Left))
            {
                lastClick = 0;
            }

            if (Input.GetMouseButton(MouseButton.Right) && lastClick == 0)
            {
                lastClick = mouseCooldown;

                PlaceBlock();
            }

            if (Input.GetMouseButton(MouseButton.Left) && lastClick == 0)
            {
                lastClick = mouseCooldown;

                BreakBlock();
            }
        }
    }
}