OtterPlayGround/OtterApp/PlayerEntity.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Otter;

namespace OtterApp
{
    class PlayerEntity : Entity
    {
        
        // Create a simple white rectangle to use for the image.
        Image image = Image.CreateRectangle(30);

        // Create a BoxCollider to pick up collectables with (and give it the Player tag)
        BoxCollider collider = new BoxCollider(30, 30, Tags.Player);

        public PlayerEntity(float x, float y) : base(x, y) {
            // Add the image for rendering.
            AddGraphic(image);

            // Center the origin of the image.
            image.CenterOrigin();

            // Add the collider. Must be added or it cant check for collision!
            AddCollider(collider);

            // Center the origin of the collider so it aligns with the image.
            collider.CenterOrigin();
        }

        public override void Update()
        {
            base.Update();

            // Basic movement with WASD.
            if (Input.KeyDown(Key.W))
            {
                Y -= 3;
            }
            if (Input.KeyDown(Key.S))
            {
                Y += 3;
            }
            if (Input.KeyDown(Key.A))
            {
                X -= 3;
            }
            if (Input.KeyDown(Key.D))
            {
                X += 3;
            }

            if (collider.Overlap(X, Y, Tags.World))
            {
                Y -= 3; 
            }
        }

        public override void Render()
        {
            base.Render();

            // Uncomment the following line to see the collider.
            collider.Render();
        }
    }
    enum Tags
    {
        Player,
        Collectable,
        World
    }
}