Unity Note - Project09 Movement
coconutnut
 2021-02-15 20:17:07      

最终想要做的移动方式：

  • 点击地面导航
  • 拖拽旋转
  • 缩放平移
  • 点击画导航

交互方式参考：

https://sketchfab.com/3d-models/richards-art-gallery-audio-tour-0e3e19faa6474fd5974e6a7ed1b221d8

搭建

点击移动

参考Project02，AI导航+NavMeshAgent

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if(Input.GetMouseButtonDown(0)){
  RaycastHit hit;
  Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
  if(Physics.Raycast(ray, out hit, Mathf.Infinity)){
    agent.SetDestination(hit.point);
  }
}

判断落点，只有是地面才移动（地面打Tag）

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if(Input.GetMouseButtonDown(0)){
	RaycastHit hit;
	Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
	if(Physics.Raycast(ray, out hit, Mathf.Infinity)){
		if(hit.transform.tag == "Floor"){
			agent.SetDestination(hit.point);
		} 
	}
}

点击特效

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// click to navigate
if(Input.GetMouseButtonDown(0)){
    RaycastHit hit;
    Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
    if(Physics.Raycast(ray, out hit, Mathf.Infinity)){
        // move when hit floor
        if(hit.transform.tag == "Floor"){
            agent.SetDestination(hit.point);

            // click effect
            GameObject clickEffectObject = Instantiate(clickEffect);
            clickEffectObject.transform.position = hit.point;
            Destroy(clickEffectObject, 0.5f);
        } 
    }
}

拖拽旋转视角

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// get mouse position
float mouseX = Input.GetAxis("Mouse X") * mouseSensitivity * Time.deltaTime;
float mouseY = Input.GetAxis("Mouse Y") * mouseSensitivity * Time.deltaTime;

// rotate camera up and down
cameraRotation -= mouseY;
cameraRotation = Mathf.Clamp(cameraRotation, -30f, 30f);
cameraTransform.localRotation = Quaternion.Euler(cameraRotation, 0f, 0f);

// rotate player left and right
transform.Rotate(Vector3.up * (mouseX));

此时长按拖拽和点击寻路会混，加一个mouseDownCount计数

缩放前后移动

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// stop navigation
agent.ResetPath();

// scroll to move forward and backward
Vector3 move = transform.forward * Input.GetAxis("Mouse ScrollWheel") * scrollSensitivity;
agent.Move(move * Time.deltaTime);

！这里一定要先停止寻路，否则会乱抖

最终

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using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class PlayerController : MonoBehaviour
{
    [SerializeField, Range(0f,100f)]
    private float scrollSensitivity = 10f;

    [SerializeField, Range(0f,500f)]
    private float mouseSensitivity = 200f;

    [SerializeField]
    private Transform cameraTransform = null;

    private float cameraRotation = 0f;
    private int mouseDownCount = 0;

    UnityEngine.AI.NavMeshAgent agent;

    GameObject clickEffect;

    void Start()
    {
        agent = GetComponent<UnityEngine.AI.NavMeshAgent>();

        clickEffect = Resources.Load<GameObject>("Prefabs/ClickEffect");
    }

    void Update()
    {
        if(Input.GetMouseButtonUp(0)){
            // if is click
            if(mouseDownCount < 2){
                // click to navigate
                RaycastHit hit;
                Ray ray = Camera.main.ScreenPointToRay(Input.mousePosition);
                if(Physics.Raycast(ray, out hit, Mathf.Infinity)){
                    // move when hit floor
                    if(hit.transform.tag == "Floor"){
                        agent.SetDestination(hit.point);

                        // click effect
                        GameObject clickEffectObject = Instantiate(clickEffect);
                        clickEffectObject.transform.position = hit.point;
                        Destroy(clickEffectObject, 1);
                    } 
                }
            }
            mouseDownCount = 0;
        }else if(Input.GetAxis("Mouse ScrollWheel") != 0){
            // stop navigation
            agent.ResetPath();

            // scroll to move forward and backward
            Vector3 move = transform.forward * Input.GetAxis("Mouse ScrollWheel") * scrollSensitivity;
            agent.Move(move * Time.deltaTime);
        }else if(Input.GetMouseButton(0)){
            // stop navigation
            agent.ResetPath();

            // get mouse position
            float mouseX = Input.GetAxis("Mouse X") * mouseSensitivity * Time.deltaTime;
            float mouseY = Input.GetAxis("Mouse Y") * mouseSensitivity * Time.deltaTime;

            // rotate camera up and down
            cameraRotation -= mouseY;
            cameraRotation = Mathf.Clamp(cameraRotation, -30f, 30f);
            cameraTransform.localRotation = Quaternion.Euler(cameraRotation, 0f, 0f);

            // rotate player left and right
            transform.Rotate(Vector3.up * (mouseX));

            mouseDownCount++;
        }
    }
}

点击寻路

滚动前后平移

拖拽旋转视角

且寻路过程中，滚动或拖拽均打断寻路