Unity（四十八）：Unity与Web双向交互

效果

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游戏对象绑定脚本

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游戏脚本源码

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

public class Tent : MonoBehaviour
{
    public Camera camera;

    // Start is called before the first frame update
    void Start()
    {
    }

    // Update is called once per frame
    [System.Obsolete]
    void Update()
    {
        SendUnityMessage();
    }

    /// <summary>
    /// 发送数据到Web端
    /// </summary>
    [System.Obsolete]
    public void SendUnityMessage() {
        // 当前游戏对象的位置
        Vector3 worldPoint = transform.position;
        // 转换为屏幕位置
        Vector3 screenPoint = camera.WorldToScreenPoint(worldPoint);
        // w屏宽, h屏高, x位置, y位置
        Vector4 position = new Vector4(Screen.width, Screen.height, screenPoint.x, Screen.height - screenPoint.y);
        // 发送到Web端
        Application.ExternalCall("updatePosition2Web", transform.gameObject.name, position);
    }

    /// <summary>
    /// 接收来自Web的传参
    /// </summary>
    /// <param name="message">传参信息</param>
    public void ReceiveWebMessage(string message) {
        transform.position = Vector3.zero;
        Debug.Log(message);
    }
}

打包为Web应用

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修改打包后的HTML源码

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* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html,
body {
  position: relative;
  width: 100%;
  height: 100%;
  overflow: hidden;
}

#unity-canvas,
#unity-svg {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 100%;
  height: 100%;
}

<!DOCTYPE html>
<html lang="en-us">

<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Unity WebGL Player</title>
  <link rel="shortcut icon" href="TemplateData/favicon.ico">
  <link rel="stylesheet" href="TemplateData/style.css">
  <link rel="manifest" href="manifest.webmanifest">
</head>

<body>
  <canvas id="unity-canvas" width=900 height=600 tabindex="-1"></canvas>
  <svg id="unity-svg">
    <text id="svg-text"></text>
  </svg>
  </div>
  <script src="./js/d3@7.js"></script>
  <script>
    var canvas = document.querySelector("#unity-canvas");

    let unity = null;

    var buildUrl = "Build";
    var loaderUrl = buildUrl + "/XXXXXX.loader.js";
    var config = {
      dataUrl: buildUrl + "/XXXXXX.data.unityweb",
      frameworkUrl: buildUrl + "/XXXXXX.framework.js.unityweb",
      codeUrl: buildUrl + "/XXXXXX.wasm.unityweb",
      streamingAssetsUrl: "StreamingAssets",
      companyName: "DefaultCompany",
      productName: "XXXXXX",
      productVersion: "0.1",
    };

    var script = document.createElement("script");
    script.src = loaderUrl;
    script.onload = () => {
      createUnityInstance(canvas, config, (progress) => {
        console.log('progress', progress);
      }).then((unityInstance) => {
        unity = unityInstance;
      }).catch((message) => {
        alert(message);
      });
    };
    document.body.appendChild(script);

    /**
     * 获取游戏对象相对于屏幕的位置
     * @param name      游戏对象名称
     * @param position  位置信息
     */
    function updatePosition2Web(name, position) {
      const [w, h, x, y] = position.replace(/[()\s]/g, '').split(',');

      const svg = d3.select('#unity-svg').attr('viewBox', [0, 0, w, h]);
      d3.select('#svg-text')
        .text(position)
        .attr('x', x)
        .attr('y', y)
        .attr('fill', 'red')
        .attr('font-size', 30)
        .on('click', e => {
          console.log(name, unity);
          unity.SendMessage(name, "ReceiveWebMessage", "发送消息到unity!!!")
        });
    }
  </script>
</body>

</html>