HeavenStudio/Assets/Plugins/com.unity.uiextensions/Editor/BezierLineRendererEditor.cs

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2022-01-06 00:11:33 +00:00
///Credit Jason Horsburgh
///Sourced from - https://bitbucket.org/UnityUIExtensions/unity-ui-extensions/issues/127/uilinerenderer-mesh-not-updating-in-editor
using UnityEditor;
namespace UnityEngine.UI.Extensions
{
[CustomEditor(typeof(UILineRenderer))]
public class BezierLineRendererEditor : Editor
{
void OnSceneGUI()
{
UILineRenderer curveRenderer = target as UILineRenderer;
if (!curveRenderer || curveRenderer.drivenExternally || curveRenderer.Points == null || curveRenderer.Points.Length < 2)
{
return;
}
var oldMatrix = Handles.matrix;
var transform = curveRenderer.GetComponent<RectTransform>();
//Pivot must be 0,0 to edit
//transform.pivot = Vector2.zero;
Handles.matrix = transform.localToWorldMatrix;
var sizeX = curveRenderer.rectTransform.rect.width;
var sizeY = curveRenderer.rectTransform.rect.height;
var offsetX = -curveRenderer.rectTransform.pivot.x * sizeX;
var offsetY = -curveRenderer.rectTransform.pivot.y * sizeY;
Vector2[] points = new Vector2[curveRenderer.Points.Length];
for (int i = 0; i < curveRenderer.Points.Length; i++)
{
points[i] = curveRenderer.Points[i];
}
//Need to transform points to worldspace! when set to Relative
if (curveRenderer.RelativeSize)
{
for (int i = 0; i < points.Length; i++)
{
points[i] = new Vector2(points[i].x * sizeX + offsetX, points[i].y * sizeY + offsetY);
}
}
for (int i = 0; i < points.Length - 1; i += 2)
{
Handles.DrawLine(points[i], points[i + 1]);
}
for (int i = 0; i < points.Length; ++i)
{
using (var check = new EditorGUI.ChangeCheckScope())
{
var p = Handles.PositionHandle(points[i], Quaternion.identity);
if (check.changed)
{
Undo.RecordObject(curveRenderer, "Changed Curve Position");
if (curveRenderer.RelativeSize)
{
curveRenderer.Points[i] = new Vector2((p.x - offsetX) / sizeX, (p.y - offsetY) / sizeY);
}
else
{
curveRenderer.Points[i] = p;
}
curveRenderer.transform.gameObject.SetActive(false);
curveRenderer.transform.gameObject.SetActive(true);
}
}
}
Handles.matrix = oldMatrix;
}
}
}