系列文章目录

Unity工具

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前言

大家好，我是心疼你的一切，不定时更新Unity开发技巧，觉得有用记得一键三连哦。

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提示：以下是本篇文章正文内容，下面案例可供参考

一、效果如下

二、制作步骤

2-1、制作shader

首先先生成shader文件

2-2、shader代码

Shader "Custom/ZhiXiangJianTou"
{Properties{_MainTex("Texture", 2D) = "white" {}_ScrollYSpeed("Y Scroll Speed", Range(-20, 20)) = 2}SubShader{Tags { "Queue" = "Transparent" "RenderType" = "Transparent" }LOD 100//双面渲染Cull Off//Alpha混合Blend SrcAlpha OneMinusSrcAlphaPass{CGPROGRAM#pragma vertex vert#pragma fragment frag#include "UnityCG.cginc"struct appdata{float4 vertex : POSITION;float2 uv : TEXCOORD0;};struct v2f{float2 uv : TEXCOORD0;float4 vertex : SV_POSITION;};sampler2D _MainTex;float4 _MainTex_ST;fixed _ScrollYSpeed;v2f vert(appdata v){v2f o;o.vertex = UnityObjectToClipPos(v.vertex);o.uv = TRANSFORM_TEX(v.uv, _MainTex);return o;}fixed4 frag(v2f i) : SV_Target{fixed2 uv = i.uv;uv.y += _ScrollYSpeed * _Time;fixed4 col = tex2D(_MainTex, uv);return col;}ENDCG}}
}

2-3、制作材质球

所需要的贴图

2-4、新建Quad

新建一个Quad的对象，给他换上刚刚的材质球

做成预制体一会用

2-5、制作预制体

1.拖到Project自己创的文件夹下面

2.如箭头就是刚刚生层的预制体，留着一会用

2-6 、实现代码

预制体一拖，路径点一拖，运行即可看到效果

using System.Collections;
using System.Collections.Generic;
using UnityEngine;public class ZhiXiangJianTou : MonoBehaviour
{public MeshRenderer meshRenderer;//箭头3D对象Quad 预制体public List<Transform> points = new List<Transform>();//路径点private List<MeshRenderer> lines = new List<MeshRenderer>();//显示的路径public float xscale = 1f;//缩放比例public float yscale = 1f;void Start(){//箭头宽度缩放值xscale = meshRenderer.transform.localScale.x;//箭头长度缩放值yscale = meshRenderer.transform.localScale.y;}//画路径public void DrawPath(){if (points == null || points.Count <= 1)return;for (int i = 0; i < points.Count - 1; i++){DrawLine(points[i].position, points[i + 1].position, i);}}//画路径 参数为路径点数组public void DrawPath(Vector3[] points){if (points == null || points.Length <= 1)return;for (int i = 0; i < points.Length - 1; i++){DrawLine(points[i], points[i + 1], i);}}//隐藏路径public void HidePath(){for (int i = 0; i < lines.Count; i++)lines[i].gameObject.SetActive(false);}//画路径private void DrawLine(Vector3 start, Vector3 end, int index){Debug.Log(transform.gameObject.name);MeshRenderer mr;if (index >= lines.Count){mr = Instantiate(meshRenderer);lines.Add(mr);}else{mr = lines[index];}var tran = mr.transform;var length = Vector3.Distance(start, end);tran.localScale = new Vector3(xscale, length, 1);tran.position = (start + end) / 2;//指向endtran.LookAt(end);//旋转偏移tran.Rotate(90, 0, 0);mr.material.mainTextureScale = new Vector2(1, length * yscale);mr.gameObject.SetActive(true);}void OnGUI(){if (GUI.Button(new Rect(20, 40, 80, 20), "显示路径")){DrawPath();}if (GUI.Button(new Rect(20, 80, 80, 20), "隐藏路径")){HidePath();}}
}

2-7、设置Quad到脚本

2-8、路径设置如下

三、说明

这个是已经计算过根据距离算shader的间隔，不论两个点的间隔多远，shader的渲染间隔是一样的，所以不用担心每个点的间隔不一样了，毫无影响，代码直接用就好了

四、运行程序

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总结

你的点赞就是对博主的支持，有问题记得留言：
不定时更新Unity开发技巧，觉得有用记得一键三连哦。