smart-bow-infrared/Assets/Game_Hyperspace/Spine/Runtime/spine-csharp/Attachments/PointAttachment.cs

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 * Spine Runtimes License Agreement
 * Last updated July 28, 2023. Replaces all prior versions.
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 * Copyright (c) 2013-2023, Esoteric Software LLC
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using System;

namespace Spine {
	/// <summary>
	/// An attachment which is a single point and a rotation. This can be used to spawn projectiles, particles, etc. A bone can be
	/// used in similar ways, but a PointAttachment is slightly less expensive to compute and can be hidden, shown, and placed in a
	/// skin.
	/// <p>
	/// See <a href="http://esotericsoftware.com/spine-point-attachments">Point Attachments</a> in the Spine User Guide.
	/// </summary>
	public class PointAttachment : Attachment {
		internal float x, y, rotation;
		public float X { get { return x; } set { x = value; } }
		public float Y { get { return y; } set { y = value; } }
		public float Rotation { get { return rotation; } set { rotation = value; } }

		public PointAttachment (string name)
			: base(name) {
		}

		/// <summary>Copy constructor.</summary>
		protected PointAttachment (PointAttachment other)
			: base(other) {
			x = other.x;
			y = other.y;
			rotation = other.rotation;
		}

		public void ComputeWorldPosition (Bone bone, out float ox, out float oy) {
			bone.LocalToWorld(this.x, this.y, out ox, out oy);
		}

		public float ComputeWorldRotation (Bone bone) {
			float r = rotation * MathUtils.DegRad, cos = (float)Math.Cos(r), sin = (float)Math.Sin(r);
			float x = cos * bone.a + sin * bone.b;
			float y = cos * bone.c + sin * bone.d;
			return MathUtils.Atan2Deg(y, x);
		}

		public override Attachment Copy () {
			return new PointAttachment(this);
		}
	}
}