PacManUdon/Assets/Scripts/GridMoverTools.cs

namespace Marro.PacManUdon
{
    using System;
    using UnityEngine;

    public static class GridMoverTools
    {
        public static Vector2 GetNextPosition(Vector2 currentPosition, Vector2 direction, float speed)
        {
            return currentPosition + direction * speed * Time.deltaTime;
        }

        public static Vector2 PositionToGrid(Vector2 position)
        {
            return new Vector2((float)Math.Round(position.x), (float)Math.Round(position.y));
        }

        public static bool CrossesTileCenter(Vector2 currentPosition, Vector2 nextPosition, bool horizontal, bool vertical)
        {
            bool result = false;

            if (horizontal)
            {
                result = result || Math.Floor(currentPosition.x) != Math.Floor(nextPosition.x);
            }
            if (vertical)
            {
                result = result || Math.Floor(currentPosition.y) != Math.Floor(nextPosition.y);
            }

            // Debug.Log($"CrossesTileCenter at currentPosition {currentPosition} with nextPosition {nextPosition}, horizontal {horizontal} and vertical {vertical} gives {result}");
            return result;
        }

        public static bool CrossesTileBorder(Vector2 currentPosition, Vector2 nextPosition, bool horizontal, bool vertical)
        {
            bool result = false;

            if (horizontal)
            {
                result = result || nextPosition.x != currentPosition.x
                    && ((Math.Floor(currentPosition.x) != Math.Floor(nextPosition.x) && nextPosition.x % 1 != 0)
                        || currentPosition.x % 1 == 0);
            }
            if (vertical)
            {
                result = result || nextPosition.y != currentPosition.y
                    && ((Math.Floor(currentPosition.y) != Math.Floor(nextPosition.y) && nextPosition.y % 1 != 0)
                        || currentPosition.y % 1 == 0);
            }
            return result;
        }

        public static bool CheckCollisionInDirection(Transform transform, Vector2 position, Vector2 direction)
        {
            // Debug.Log("Collision check");
            bool result = Physics.Linecast(transform.parent.TransformPoint(position), transform.parent.TransformPoint(position + direction.normalized), 1 << 22, QueryTriggerInteraction.Ignore);
            // Debug.DrawLine(transform.parent.TransformPoint(position), transform.parent.TransformPoint(position + direction.normalized), Color.red, 1);
            // Debug.Log($"{gameObject} Collision; Position {position} became {transform.parent.TransformPoint(position)}, direction {direction.normalized} became {transform.parent.TransformDirection(direction.normalized)}");
            // Debug.Log("collision check for " + position + " in direction " + direction + " returned " + result);
            return result;
        }
    }
}