78 lines
3.1 KiB
C#
78 lines
3.1 KiB
C#
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// Copyright (c) 2015 - 2023 Doozy Entertainment. All Rights Reserved.
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// This code can only be used under the standard Unity Asset Store End User License Agreement
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// A Copy of the EULA APPENDIX 1 is available at http://unity3d.com/company/legal/as_terms
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using UnityEngine;
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using static UnityEngine.Mathf;
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namespace Doozy.Runtime.UIDesigner
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{
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public static class RectTransformExtensions
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{
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/// <summary> Get UIDesigner rect </summary>
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/// <param name="target"> Target RectTransform </param>
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public static Rect DesignerRect(this RectTransform target)
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{
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Rect targetRect = target.rect;
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Vector3 targetLocalEulerAngles = target.localEulerAngles;
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Vector3 tempLocalScale = target.localScale;
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Vector2 targetLocalScale = new Vector2(Abs(tempLocalScale.x), Abs(tempLocalScale.y));
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float width = targetRect.width * targetLocalScale.x;
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float height = targetRect.height * targetLocalScale.y;
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float x = targetRect.x + targetRect.width / 2f - width / 2f;
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float y = targetRect.y + targetRect.height / 2f - height / 2f;
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float rotationOffsetX = 0f;
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float rotationOffsetY = 0f;
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float newWidth;
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float newHeight;
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float angle = Abs(targetLocalEulerAngles.z % 180);
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float theta = angle * Deg2Rad;
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if (Approximately(angle, 0) || Approximately(angle, 90))
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{
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newWidth = width;
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newHeight = height;
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}
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else if (angle < 90)
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{
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newWidth = width * Cos(theta) + height * Sin(theta);
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newHeight = width * Sin(theta) + height * Cos(theta);
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}
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else
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{
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angle -= 90;
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theta = angle * Deg2Rad;
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newWidth = height * Cos(theta) + width * Sin(theta);
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newHeight = height * Sin(theta) + width * Cos(theta);
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}
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rotationOffsetX = (newWidth - width) / 2f;
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rotationOffsetY = (newHeight - height) / 2f;
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return new Rect(x + rotationOffsetX, y + rotationOffsetY, newWidth, newHeight);
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}
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/// <summary> Change the RectTransform pivot without changing the position </summary>
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/// <param name="target"> Target RectTransform </param>
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/// <param name="pivot"> New pivot value </param>
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public static RectTransform ChangePivot(this RectTransform target, Vector2 pivot)
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{
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Vector2 sizeDelta = target.sizeDelta;
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Vector3 localScale = target.localScale;
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Vector2 deltaPivot = target.pivot - pivot;
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float deltaX = deltaPivot.x * sizeDelta.x * localScale.x;
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float deltaY = deltaPivot.y * sizeDelta.y * localScale.y;
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float rot = target.rotation.eulerAngles.z * PI / 180;
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var deltaPosition = new Vector3(Cos(rot) * deltaX - Sin(rot) * deltaY, Sin(rot) * deltaX + Cos(rot) * deltaY);
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target.pivot = pivot;
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target.localPosition -= deltaPosition;
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return target;
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}
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}
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}
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