Unity - Scripting API: Handles.DrawSolidArc

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Declaration

public static void DrawSolidArc(Vector3 center, Vector3 normal, Vector3 from, float angle, float radius);

Parameters

Parameter	Description
center	The center of the circle.
normal	The normal of the circle.
from	The direction of the point on the circumference, relative to the center, where the sector begins.
angle	The angle of the sector, in degrees.
radius	The radius of the circle Note: Use HandleUtility.GetHandleSize where you might want to have constant screen-sized handles.

Description

Draw a circular sector (pie piece) in 3D space.

Solid Arc in the Scene View.

using UnityEditor;
using UnityEngine;static class ArcExample
{
    static Vector3 m_Angle = new Vector3(1.5f, .66f, 0f);
    // Create an arc at 0, 0, 0 in the Scene view and a slider that changes thes angle of the arc.
    [InitializeOnLoadMethod]
    static void Init() => SceneView.duringSceneGui += view =>
    {
        Handles.DrawLine(new Vector3(1.5f, 0f, 0f), new Vector3(1.5f, 1f, 0f));
        var handleSize = HandleUtility.GetHandleSize(m_Angle) * .1f;
        m_Angle = Handles.Slider(m_Angle, Vector3.up, handleSize, Handles.DotHandleCap, EditorSnapSettings.move.x);
        m_Angle.y = Mathf.Clamp(m_Angle.y, 0f, 1f);
        Handles.Label(m_Angle + Vector3.right * handleSize * 2f, $"Angle {m_Angle.y * 360f}");
        Handles.DrawSolidArc(Vector3.zero, Vector3.forward, Vector3.up, m_Angle.y * -360f, 1f);
    };
}