DrawGizmo.DrawGizmo 构造DrawGizmo

/// The RenderLightGizmo function will be called if the light is not selected.
/// The gizmo is drawn when picking.
///如果灯光不选择RenderLightGizmo函数将被调用
///当点选时gizmo被绘制

@DrawGizmo (GizmoType.NotSelected | GizmoType.Pickable)
static function RenderLightGizmo (light : Light, gizmoType : GizmoType) {
	var position = light.transform.position;
	// Draw the light icon //绘制灯光图标
	// (A bit above the one drawn by the builtin light gizmo renderer)
	Gizmos.DrawIcon (position + Vector3.up, "Light Gizmo.tiff");

	// Are we selected? Draw a solid sphere surrounding the light
	//当选择时，围绕灯光绘制一个球形
	if ((gizmoType & GizmoType.SelectedOrChild) != 0) {
		// Indicate that this is the active object by using a brighter color.
		//使用明亮的颜色，表明这是激活的物体
		if ((gizmoType & GizmoType.Active) != 0)
			Gizmos.color = Color.red;
		else
			Gizmos.color = Color.red * 0.5;
		Gizmos.DrawSphere (position, light.range);
	}
}

/*
// Draw the gizmo if it is selected or a child of the selection.
// This is the most common way to render a gizmo
//如果它或它的子物体被选择，绘制gizmo；这是最常用的渲染gizmo方法

@DrawGizmo (GizmoType.SelectedOrChild)

// Draw the gizmo only if it is the active object.
//仅绘制激活物体的gizmo

@DrawGizmo (GizmoType.Active)]
*/

/// C# example
using UnityEditor;
using UnityEngine;

class GizmoTest {
	/// The RenderLightGizmo function will be called if the light is not selected.
	/// The gizmo is drawn when picking.
	[DrawGizmo (GizmoType.NotSelected | GizmoType.Pickable)]
	static void RenderLightGizmo (Light light, GizmoType gizmoType) {
		Vector3 position = light.transform.position;
		// Draw the light icon
		// (A bit above the one drawn by the builtin light gizmo renderer)
		Gizmos.DrawIcon (position + Vector3.up, "Light Gizmo.tiff");

		// Are we selected? Draw a solid sphere surrounding the light
		if ((gizmoType & GizmoType.SelectedOrChild) != 0) {
			// Indicate that this is the active object by using a brighter color.
			if ((gizmoType & GizmoType.Active) != 0)
				Gizmos.color = Color.red;
			else
				Gizmos.color = Color.red * 0.5F;
			Gizmos.DrawSphere (position, light.range);
		}
	}
}
/*
// Draw the gizmo if it is selected or a child of the selection.
// This is the most common way to render a gizmo
[DrawGizmo (GizmoType.SelectedOrChild)]

// Draw the gizmo only if it is the active object.
[DrawGizmo (GizmoType.Active)]
*/