Question

JavaScript => public static function DrawLine(start: Vector3, end: Vector3, color: Color = Color.white, duration: float = 0.0f, depthTest: bool = true): void;
C# => public static void DrawLine(Vector3 start, Vector3 end, Color color = Color.white, float duration = 0.0f, bool depthTest = true);

Parameters 参数

start	Point in world space where the line should start.
end	Point in world space where the line should end.
color	Color of the line.
duration	How long the line should be visible for.
depthTest	Should the line be obscured by objects closer to the camera?

Description 描述

Draws a line between specified start and end points.
在指定的起点与终点之间画条线。

The line will be drawn in the scene view of the editor. If gizmo drawing is enabled in the game view, the line will also be drawn there. The duration is the time (in seconds) for which the line will be visible after it is first displayed. A duration of zero shows the line for just one frame.
该线条将会显示在编辑器窗口的场景中。如果在游戏视窗打开绘画线框，该线条也会被画在该视图。在可持续的时间内（以秒为单位）该线将在第一次显示后可见。duration值为0表示该线仅显示一帧可见。

Note: This is for debugging playmode only. Editor gizmos should be drawn with Gizmos.Drawline or Handles.DrawLine instead.
注意：这仅供调试。编辑线框用Gizmos.Drawline或 Handles.DrawLine代替该方法。

JavaScript:

	// Frame update example: Draws a red line from the world-space origin to the point (1, 0, 0) for 1 frame.
	function Update () {
		Debug.DrawLine (Vector3.zero, Vector3 (1, 0, 0), Color.red);
	}

JavaScript:

// Event callback example: Debug-draw all contact points and normals for 2 seconds.
	function OnCollisionEnter(collision : Collision) {
		for (var contact : ContactPoint in collision.contacts) {
			Debug.DrawLine(contact.point, contact.point + contact.normal, Color.green, 2, false);
		}
	}

C#:

using UnityEngine;
using System.Collections;
 
public class ExampleClass : MonoBehaviour {
    void Update() {
        Debug.DrawLine(Vector3.zero, new Vector3(1, 0, 0), Color.red);
    }
}

C#:

using UnityEngine;
using System.Collections;
 
public class ExampleClass : MonoBehaviour {
    void OnCollisionEnter(Collision collision) {
        foreach (ContactPoint contact in collision.contacts) {
            Debug.DrawLine(contact.point, contact.point + contact.normal, Color.green, 2, false);
        }
    }
}

debug