使用 UnityEditor.Handles 为Unity Gizmos 实现的扩展：
GizmosX.DrawWireArc() ：画圆弧线GizmosX.DrawSolidArc() ：画扇形GizmosX.DrawWireDisc() ：画空心圆GizmosX.DrawSolidDisc() ：画实心圆 // GizmosExtension.cs namespace UnityEngine { /// <summary> /// Gizmos Extensions. /// </summary> public static class GizmosX { /// <summary> /// Draw a circular arc in 3D space. /// </summary> /// <param name="center">The center of the circle.</param> /// <param name="normal">The normal of the circle.</param> /// <param name="from">The direction of the point on the circle circumference, relative to the center, where the arc begins.</param> /// <param name="angle"> The angle of the arc, in degrees.</param> /// <param name="radius">The radius of the circle Note: Use HandleUtility.GetHandleSize where you might want to have constant screen-sized handles.</param> [System.Diagnostics.Conditional("UNITY_EDITOR")] public static void DrawWireArc(Vector3 center, Vector3 normal, Vector3 from, float angle, float radius) { #if UNITY_EDITOR UnityEditor.Handles.color = Gizmos.color; UnityEditor.Handles.DrawWireArc(center, normal, from, angle, radius); #endif } /// <summary> /// Draw a circular sector (pie piece) in 3D space. /// </summary> /// <param name="center">The center of the circle.</param> /// <param name="normal">The normal of the circle.</param> /// <param name="from">The direction of the point on the circle circumference, relative to the center, where the arc begins.</param> /// <param name="angle"> The angle of the arc, in degrees.</param> /// <param name="radius">The radius of the circle Note: Use HandleUtility.GetHandleSize where you might want to have constant screen-sized handles.</param> [System.Diagnostics.Conditional("UNITY_EDITOR")] public static void DrawSolidArc(Vector3 center, Vector3 normal, Vector3 from, float angle, float radius) { #if UNITY_EDITOR UnityEditor.Handles.color = Gizmos.color; UnityEditor.Handles.DrawSolidArc(center, normal, from, angle, radius); #endif } /// <summary> /// Draw the outline of a flat disc in 3D space. /// </summary> /// <param name="center">The center of the disc.</param> /// <param name="normal">The normal of the disc.</param> /// <param name="radius">The radius of the disc.</param> [System.Diagnostics.Conditional("UNITY_EDITOR")] public static void DrawWireDisc(Vector3 center, Vector3 normal, float radius) { #if UNITY_EDITOR UnityEditor.Handles.color = Gizmos.color; UnityEditor.Handles.DrawWireDisc(center, normal, radius); #endif } /// <summary> /// Draw a solid flat disc in 3D space. /// Note: Use HandleUtility.GetHandleSize where you might want to have constant screen-sized handles. /// </summary> /// <param name="center">The center of the disc.</param> /// <param name="normal">The normal of the disc.</param> /// <param name="radius">The radius of the disc.</param> [System.Diagnostics.Conditional("UNITY_EDITOR")] public static void DrawSolidDisc(Vector3 center, Vector3 normal, float radius) { #if UNITY_EDITOR UnityEditor.Handles.color = Gizmos.color; UnityEditor.Handles.DrawSolidDisc(center, normal, radius); #endif } /// <summary> /// Make a text label positioned in 3D space. /// </summary> /// <param name="position">Position in 3D space as seen from the current handle camera.</param> /// <param name="text">Text to display on the label.</param> [System.Diagnostics.Conditional("UNITY_EDITOR")] public static void Label(Vector3 position, string text) { #if UNITY_EDITOR UnityEditor.Handles.color = Gizmos.color; UnityEditor.Handles.Label(position, text); #endif } /// <summary> /// Make a text label positioned in 3D space. /// Note: Use HandleUtility.GetHandleSize where you might want to have constant screen-sized handles. /// </summary> /// <param name="position">Position in 3D space as seen from the current handle camera.</param> /// <param name="content">Text, image and tooltip for this label.</param> /// <param name="style">The style to use. If left out, the label style from the current GUISkin is used.</param> [System.Diagnostics.Conditional("UNITY_EDITOR")] public static void Label(Vector3 position, GUIContent content, GUIStyle style) { #if UNITY_EDITOR UnityEditor.Handles.color = Gizmos.color; UnityEditor.Handles.Label(position, content, style); #endif } } }