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/******************************************************************************
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* Spine Runtimes Software License v2.5
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*
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* Copyright (c) 2013-2016, Esoteric Software
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* All rights reserved.
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*
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* You are granted a perpetual, non-exclusive, non-sublicensable, and
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* non-transferable license to use, install, execute, and perform the Spine
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* Runtimes software and derivative works solely for personal or internal
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* use. Without the written permission of Esoteric Software (see Section 2 of
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* the Spine Software License Agreement), you may not (a) modify, translate,
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* adapt, or develop new applications using the Spine Runtimes or otherwise
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* create derivative works or improvements of the Spine Runtimes or (b) remove,
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* delete, alter, or obscure any trademarks or any copyright, trademark, patent,
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* or other intellectual property or proprietary rights notices on or in the
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* Software, including any copy thereof. Redistributions in binary or source
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* form must include this license and terms.
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*
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* THIS SOFTWARE IS PROVIDED BY ESOTERIC SOFTWARE "AS IS" AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
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* EVENT SHALL ESOTERIC SOFTWARE BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, BUSINESS INTERRUPTION, OR LOSS OF
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* USE, DATA, OR PROFITS) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
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* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*****************************************************************************/
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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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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 cos = MathUtils.CosDeg(rotation), sin = MathUtils.SinDeg(rotation);
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float ix = cos * bone.a + sin * bone.b;
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float iy = cos * bone.c + sin * bone.d;
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return MathUtils.Atan2(iy, ix) * MathUtils.RadDeg;
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}
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}
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}
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