Legacy Documentation: Version 2017.2 (Go to current version)
LanguageEnglish
  • C#
  • JS

Script language

Select your preferred scripting language. All code snippets will be displayed in this language.

Plane.Raycast

Suggest a change

Success!

Thank you for helping us improve the quality of Unity Documentation. Although we cannot accept all submissions, we do read each suggested change from our users and will make updates where applicable.

Close

Submission failed

For some reason your suggested change could not be submitted. Please <a>try again</a> in a few minutes. And thank you for taking the time to help us improve the quality of Unity Documentation.

Close

Cancel

public method Raycast(ray: Ray, out enter: float): bool;
public bool Raycast(Ray ray, out float enter);

Description

Intersects a ray with the plane.

This function sets enter to the distance along the ray, where it intersects the plane. If the ray is parallel to the plane, function returns false and sets enter to zero. If the ray is pointing in the opposite direction than the plane, function returns false/ and sets enter to the distance along the ray (negative value).

// Position a marker object at the point on the "ground" where the
// mouse is clicked. The ground is represented by a Plane object.
var groundPlane: Plane;
var markerObject: Transform;

function Update() { // If the mouse button is clicked... if (Input.GetMouseButtonDown(0)) { // Get a ray corresponding to the screen position of the mouse. var ray = Camera.main.ScreenPointToRay(Input.mousePosition); var rayDistance: float;

// If the ray makes contact with the ground plane then // position the marker at the distance along the ray where it // crosses the plane. if (groundPlane.Raycast(ray, rayDistance)) { markerObject.position = ray.GetPoint(rayDistance); } } }
using UnityEngine;
using System.Collections;

public class ExampleClass : MonoBehaviour { public Plane groundPlane; public Transform markerObject; void Update() { if (Input.GetMouseButtonDown(0)) { Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition); float rayDistance; if (groundPlane.Raycast(ray, out rayDistance)) markerObject.position = ray.GetPoint(rayDistance); } } }

See Also: Physics.Raycast.

对文档有任何疑问,请移步至开发者社区提问,我们将尽快为您解答