How do I change the model's expressions during gameplay?

Comments

• naotaro

  December 2015

  Hi, CBeam .
  
  I think change of model's expressions is a code only to SampleApp1 project of Live2D Unity SDK.
  It has change of model's expressions in LAppModel.cs .

  [SampleApp1/Assets/Scripts/sample/LAppModel.cs]
  

  public void Init(String modelJson)
  {
  	・
  	・
  	// Expression .json Load
  	if (modelSetting.GetExpressionNum() != 0)
  	{
  		var len = modelSetting.GetExpressionNum();
  		for (int i = 0; i < len; i++)
  		{
  			loadExpression(modelSetting.GetExpressionName(i), modelHomeDir + modelSetting.GetExpressionFile(i));
  		}
  	}
  	・
  	・
  }
  
  public void Update()
  {
  	・
  	・
  	// Expression parameter update
  	if (expressionManager != null) expressionManager.updateParam(live2DModel);
  	・
  	・
  	
  	// parameter update
  	live2DModel.update();
  }
  

  Good luck !
  

  0 · Share on Facebook
• Wai

  December 2015

  :'( I really wish I could help you with this CBeam, but I know nothing about Unity. I hope naotaro answered your question. He/She is awesome. Good luck!!

  0 · Share on Facebook
• CBeam

  December 2015 edited December 2015

  Ah, it's ok Wai, thank you though.
  
  Naotaro, I think I have not explained my situation properly, but I am thankful for your response. What I want to do is to have the live2d model's emotion to change during gameplay, so I think that a function that uses "Input" during the "Update()" is required, but I don't know which.
  
  For example, when I press "A", the emotion changes to "Confident Smile", and when I press "B", it changes to "Laughing".
  
  Finding a function that changes the expression during "Update()" depending on a variable would also solve my issue.
  
  

  Explanation.PNG 54.2K

  0 · Share on Facebook
• naotaro

  December 2015 edited December 2015

  My Acquaintance is creating a simple script . Please wait a little .

  0 · Share on Facebook
• yasu.o@live2d

  December 2015

  Hi, CBeam.
  
  You can switch facial expression by changing /sample/Simple/simpleModel.cs of Live2D SDK like below:

  using UnityEngine;
  using live2d;
  using live2d.framework; //
  
  [ExecuteInEditMode]
  public class SimpleModel : MonoBehaviour 
  {
  	public TextAsset mocFile ;
  	public Texture2D[] textureFiles ;
  	
  	private Live2DModelUnity live2DModel;
      private Matrix4x4 live2DCanvasPos;
  
      // expression
      public TextAsset expJsonA, expJsonB; //Please Drag & Drop .exp.json to expJsonA and expJsonB in the Inspector of the Unity Editor.
      AMotion expressionMotionA, expressionMotionB;
      MotionQueueManager expressionMgr;
  	
  	void Start ()
      {
          if (live2DModel != null) return;
          Live2D.init();
  
          live2DModel = Live2DModelUnity.loadModel(mocFile.bytes);
          for (int i = 0; i < textureFiles.Length; i++)
          {
              live2DModel.setTexture(i, textureFiles[i]);
          }
  
          float modelWidth = live2DModel.getCanvasWidth();
          live2DCanvasPos = Matrix4x4.Ortho(0, modelWidth, modelWidth, 0, -50.0f, 50.0f);
  
          // load .exp.json
          expressionMotionA = L2DExpressionMotion.loadJson(expJsonA.bytes);
          expressionMotionB = L2DExpressionMotion.loadJson(expJsonB.bytes);
  
          expressionMgr = new MotionQueueManager();
      }
  	
      void Update()
      {
          if (live2DModel == null) return;
          live2DModel.setMatrix(transform.localToWorldMatrix * live2DCanvasPos);
  
          if (!Application.isPlaying)
          {
              live2DModel.update();
              return;
          }
          
  
          // Change Expression.
          if (Input.GetKeyDown(KeyCode.A))
          {// pressed "A" key.
              expressionMgr.startMotion(expressionMotionA);
          }
          else if (Input.GetKeyDown(KeyCode.B))
          {// pressed "B" key.
              expressionMgr.startMotion(expressionMotionB);
          }
  
          // update change of expression to Live2D model.
          expressionMgr.updateParam(live2DModel);
          
          live2DModel.update();
      }
  	
  	void OnRenderObject()
  	{
          if (live2DModel == null) return;
          live2DModel.draw();
      }
  }

  
  Add L2DExpressionMotion.cs to the project because L2DExpressionMotion is used to load exp.json.
  L2DExpressionMotion is in /framework folder of Live2D SDK.
  
  I hope this will answer your question.

  0 · Share on Facebook
• CBeam

  December 2015 edited December 2015

  I have followed your instructions and used expression 6 and 8. It works!
  
  Thank you very much naotaro for your help and y_a_s_ for the code!
  
  

  7b996daaa0714df155df0bc29f3ff9a6.gif 71.3K

  0 · Share on Facebook