quantum-space-buddies/QSB/Utility/Popcron.Gizmos/Drawers/SquareDrawer.cs

using UnityEngine;

namespace Popcron
{
	public class SquareDrawer : Drawer
	{
		public SquareDrawer()
		{

		}

		public override int Draw(ref Vector3[] buffer, params object[] values)
		{
			Vector2 position = default;
			if (values[0] is Vector2 p2)
			{
				position = p2;
			}
			else if (values[0] is Vector3 p3)
			{
				position = p3;
			}

			var rotation = (Quaternion)values[1];

			Vector2 size = default;
			if (values[2] is Vector2 s2)
			{
				size = s2;
			}
			else if (values[2] is Vector3 s3)
			{
				size = s3;
			}

			size *= 0.5f;

			Vector2 point1 = new Vector3(position.x - size.x, position.y - size.y);
			Vector2 point2 = new Vector3(position.x + size.x, position.y - size.y);
			Vector2 point3 = new Vector3(position.x + size.x, position.y + size.y);
			Vector2 point4 = new Vector3(position.x - size.x, position.y + size.y);

			point1 = rotation * (point1 - position);
			point1 += position;

			point2 = rotation * (point2 - position);
			point2 += position;

			point3 = rotation * (point3 - position);
			point3 += position;

			point4 = rotation * (point4 - position);
			point4 += position;

			//square
			buffer[0] = point1;
			buffer[1] = point2;

			buffer[2] = point2;
			buffer[3] = point3;

			buffer[4] = point3;
			buffer[5] = point4;

			//loop back to start
			buffer[6] = point4;
			buffer[7] = point1;

			return 8;
		}
	}
}