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104 lines
3.6 KiB
104 lines
3.6 KiB
1 year ago
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// This code is part of the Fungus library (https://github.com/snozbot/fungus)
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// It is released for free under the MIT open source license (https://github.com/snozbot/fungus/blob/master/LICENSE)
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// Original code by Martin Ecker (http://martinecker.com)
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using UnityEngine;
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namespace Fungus.EditorUtils
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{
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// Helper Rect extension methods
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public static class RectExtensions
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{
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public static Vector2 TopLeft(this Rect rect)
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{
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return new Vector2(rect.xMin, rect.yMin);
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}
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public static Rect ScaleSizeBy(this Rect rect, float scale)
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{
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return rect.ScaleSizeBy(scale, rect.center);
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}
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public static Rect ScaleSizeBy(this Rect rect, float scale, Vector2 pivotPoint)
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{
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Rect result = rect;
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result.x -= pivotPoint.x;
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result.y -= pivotPoint.y;
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result.xMin *= scale;
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result.xMax *= scale;
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result.yMin *= scale;
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result.yMax *= scale;
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result.x += pivotPoint.x;
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result.y += pivotPoint.y;
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return result;
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}
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public static Rect ScaleSizeBy(this Rect rect, Vector2 scale)
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{
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return rect.ScaleSizeBy(scale, rect.center);
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}
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public static Rect ScaleSizeBy(this Rect rect, Vector2 scale, Vector2 pivotPoint)
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{
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Rect result = rect;
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result.x -= pivotPoint.x;
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result.y -= pivotPoint.y;
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result.xMin *= scale.x;
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result.xMax *= scale.x;
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result.yMin *= scale.y;
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result.yMax *= scale.y;
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result.x += pivotPoint.x;
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result.y += pivotPoint.y;
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return result;
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}
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public static Rect SnapPosition(this Rect rect, float snapInterval)
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{
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var tmp = rect;
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var x = tmp.position.x;
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var y = tmp.position.y;
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tmp.position = new Vector2(Mathf.RoundToInt(x / snapInterval) * snapInterval, Mathf.RoundToInt(y / snapInterval) * snapInterval);
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return tmp;
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}
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public static Rect SnapWidth(this Rect rect, float snapInterval)
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{
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var tmp = rect;
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tmp.width = Mathf.RoundToInt(tmp.width / snapInterval) * snapInterval;
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return tmp;
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}
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}
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public class EditorZoomArea
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{
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private static Matrix4x4 _prevGuiMatrix;
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private static Vector2 offset = new Vector2(2.0f, 19.0f);
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public static Vector2 Offset { get { return offset; } set { offset = value; } }
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public static Rect Begin(float zoomScale, Rect screenCoordsArea)
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{
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GUI.EndGroup(); // End the group Unity begins automatically for an EditorWindow to clip out the window tab. This allows us to draw outside of the size of the EditorWindow.
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Rect clippedArea = screenCoordsArea.ScaleSizeBy(1.0f / zoomScale, screenCoordsArea.TopLeft());
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clippedArea.position += offset;
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GUI.BeginGroup(clippedArea);
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_prevGuiMatrix = GUI.matrix;
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Matrix4x4 translation = Matrix4x4.TRS(clippedArea.TopLeft(), Quaternion.identity, Vector3.one);
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Matrix4x4 scale = Matrix4x4.Scale(new Vector3(zoomScale, zoomScale, 1.0f));
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GUI.matrix = translation * scale * translation.inverse * GUI.matrix;
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return clippedArea;
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}
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public static void End()
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{
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GUI.matrix = _prevGuiMatrix;
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GUI.EndGroup();
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GUI.BeginGroup(new Rect(offset.x, offset.y, Screen.width, Screen.height));
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}
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}
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}
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