/// <summary>
/// 用以从编辑模式切换到展示模式；或等待新的输入。
/// </summary>
public void StartDisplay(string jsonFileName)
{
// 解析 json 文件并排序
FileStream jsonfile = File.OpenRead(jsonFileName);
int len = (int)jsonfile.Length;
byte[] bytes = new byte[len];
jsonfile.Read(bytes, 0, len);
// 输入的 json 文件使用 UTF-8 编码
string jsonstring = System.Text.Encoding.UTF8.GetString(bytes);
keyFrameList = JsonUtility.FromJson <KeyFrameList>(jsonstring);
if (keyFrameList == null)
{
Debug.LogError("Unexpected json string.");
}
keyFrameList.keyFrames.Sort((k1, k2) =>
{
if (k1.timestamp < k2.timestamp)
{
return(-1);
}
return(1);
});
interpreterMode = EInterpreterMode.Display;
starttime = Time.realtimeSinceStartup;
}
void Update()
{
if (interpreterMode == EInterpreterMode.Display)
{
while (i < keyFrameList.keyFrames.Count && Time.time - starttime > keyFrameList.keyFrames[i].timestamp)
{
KeyFrame frame = keyFrameList.keyFrames[i];
switch (frame.action)
{
case 0: // 出现
Appear(frame);
break;
case 1: // 消失
DisAppear(frame);
break;
case 2: // 移动和动画
Move(frame);
break;
case 3: // 播放音乐
Audio(frame);
break;
case 4: // 更换背景图片
Background(frame);
break;
case 5:
ShowSubtitle(frame);
break;
case 6:
ShowDialog(frame);
break;
default:
Debug.LogError($"Unexpected action type {frame.action} at timestamp {frame.timestamp}");
break;
}
++i;
}
if (i >= keyFrameList.keyFrames.Count)
{
interpreterMode = EInterpreterMode.Wait;
}
}
else if (interpreterMode == EInterpreterMode.Wait)
{
// 去找 streamingAssets 里有没有新文件
FileInfo[] files = streamingDir.GetFiles();
if (files.Length > fileIndex)
{
StartDisplay($"{Application.streamingAssetsPath}/{JSON_FILE_NAME}{fileIndex++}.json");
}
}
}
public void WaitNewInput()
{
interpreterMode = EInterpreterMode.Wait;
}
