/******************************************************************************
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* Spine Runtimes License Agreement
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* Last updated July 28, 2023. Replaces all prior versions.
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*
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* Copyright (c) 2013-2023, Esoteric Software LLC
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*
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* Integration of the Spine Runtimes into software or otherwise creating
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* derivative works of the Spine Runtimes is permitted under the terms and
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* conditions of Section 2 of the Spine Editor License Agreement:
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* http://esotericsoftware.com/spine-editor-license
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*
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* Otherwise, it is permitted to integrate the Spine Runtimes into software or
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* otherwise create derivative works of the Spine Runtimes (collectively,
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* "Products"), provided that each user of the Products must obtain their own
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* Spine Editor license and redistribution of the Products in any form must
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* include this license and copyright notice.
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*
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* THE SPINE RUNTIMES ARE PROVIDED BY ESOTERIC SOFTWARE LLC "AS IS" AND ANY
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* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL ESOTERIC SOFTWARE LLC BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES,
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* BUSINESS INTERRUPTION, OR LOSS OF USE, DATA, OR PROFITS) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THE
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* SPINE RUNTIMES, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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using System;
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namespace Spine {
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/// <summary>
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/// An attachment which is a single point and a rotation. This can be used to spawn projectiles, particles, etc. A bone can be
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/// used in similar ways, but a PointAttachment is slightly less expensive to compute and can be hidden, shown, and placed in a
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/// skin.
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/// <p>
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/// See <a href="http://esotericsoftware.com/spine-point-attachments">Point Attachments</a> in the Spine User Guide.
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/// </summary>
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public class PointAttachment : Attachment {
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internal float x, y, rotation;
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public float X { get { return x; } set { x = value; } }
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public float Y { get { return y; } set { y = value; } }
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public float Rotation { get { return rotation; } set { rotation = value; } }
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public PointAttachment (string name)
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: base(name) {
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}
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/// <summary>Copy constructor.</summary>
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protected PointAttachment (PointAttachment other)
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: base(other) {
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x = other.x;
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y = other.y;
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rotation = other.rotation;
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}
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public void ComputeWorldPosition (Bone bone, out float ox, out float oy) {
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bone.LocalToWorld(this.x, this.y, out ox, out oy);
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}
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public float ComputeWorldRotation (Bone bone) {
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float r = rotation * MathUtils.DegRad, cos = (float)Math.Cos(r), sin = (float)Math.Sin(r);
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float x = cos * bone.a + sin * bone.b;
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float y = cos * bone.c + sin * bone.d;
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return MathUtils.Atan2Deg(y, x);
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}
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public override Attachment Copy () {
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return new PointAttachment(this);
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}
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}
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}
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