Create a Sprite Animation Clip in Code

Question

I am trying to construct an Animation clip in C#

 AnimationClip animClip = new AnimationClip();            
 Keyframe[] ks;
 ks = new Keyframe[4];
 ks[0] = new Keyframe(0f, 0f);
 ks[1] = new Keyframe(1f, 1f); 
 ks[2] = new Keyframe(2f, 2f); 
 ks[3] = new Keyframe(3f, 3f); 
 AnimationCurve _curve = new  AnimationCurve(ks);            
 animClip.SetCurve("TestAnimation2", typeof(SpriteRenderer), "Sprite", _curve);
 animClip.wrapMode = WrapMode.Loop;
 game_object.AddComponent ("Animation");
 game_object.animation.AddClip (animClip, "AnimationCurve7");
 game_object.animation.Play("AnimationCurve7");

The above works? however :

How do I add a different sprite to each keyframe?

Answer 1

Answer by Xelnath · Feb 28, 2015 at 01:27 PM

take a look at object reference keys

         ArrayList curves = (ArrayList)paths[path];
         
         for (int i = 0; i < curves.Count; i++) {
             EditorCurveBinding binding = (EditorCurveBinding)curves[i];
             AnimationCurve curve = AnimationUtility.GetEditorCurve(animationClip, binding);
             ObjectReferenceKeyframe[] objectReferenceCurve = null;
             
             if (curve != null) {
                 AnimationUtility.SetEditorCurve(animationClip, binding, null);
             } else {
                 objectReferenceCurve = AnimationUtility.GetObjectReferenceCurve(animationClip, binding);
                 AnimationUtility.SetObjectReferenceCurve(animationClip, binding, null);
             }
             
             if (path == oldPath) {
                 binding.path = newPath;
             }
             
             if (curve != null) {
                 AnimationUtility.SetEditorCurve(animationClip, binding, curve);
             } else {
                 AnimationUtility.SetObjectReferenceCurve(animationClip, binding, objectReferenceCurve);
             }
             
         }

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Da_Elf · May 30 at 01:16 AM 0

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I see the work Editor in there a lot. is this something that can be used in a build or just the editor?

Answer 2

Ey man, I do that. I think this is good, this is my code:

 using UnityEngine;
 using System.Collections;
 using System;
 using System.Reflection;
 
 public class CharAnimation : MonoBehaviour {
     /*
         Character sprites positions:
 
         0 => Walking down 1
         1 => Standing down
         2 => Walking down 2
         3 => Walking left 1
         4 => Standing left
         5 => Walking left 2
         6 => Walking right 1
         7 => Standing right
         8 => Walking right 2
         9 => Walking up 1
         10 => Standing up
         11 => Walking up 2
 
      */
 
     private string currentAnimation = "StandDown";
     private int frame = 0;
     private int animationFrames = 20; // PAR NUMBER
 
     private Sprite[] sprites = new Sprite[12];
     private SpriteRenderer rend;
 
     Animator animator = new Animator();
 
     public void Awake(){
         rend = (SpriteRenderer) this.GetComponent<SpriteRenderer>();
     }
 
     public void Start () {
 
     }
 
     public void Update(){
         if(frame == animationFrames) frame = 0;
         frame++;
 
         callAnimation();
     }
 
     private void callAnimation(){
         if(currentAnimation      == "WalkUp")       WalkUp();
         else if(currentAnimation == "WalkDown")   WalkDown();
         else if(currentAnimation == "WalkLeft")   WalkLeft();
         else if(currentAnimation == "WalkRight")  WalkRight();
 
         else if(currentAnimation == "StandUp")       StandUp();
         else if(currentAnimation == "StandDown")  StandDown();
         else if(currentAnimation == "StandLeft")  StandLeft();
         else if(currentAnimation == "StandRight") StandRight();
     }
 
     private void changeOnFrame(int f1, int f2){
         if(frame == 1) rend.sprite = sprites[f1];
         else if(frame == animationFrames/2) rend.sprite = sprites[f2];
         else if(frame == animationFrames)     rend.sprite = sprites[f1];
     }
 
     private void WalkUp(){
         changeOnFrame(9,11);
     }
 
     private void WalkDown(){
         changeOnFrame(0,2);
     }
 
     private void WalkLeft(){
         changeOnFrame(3,5);
     }
     
     private void WalkRight(){
         changeOnFrame(6,8);
     }
 
     private void StandUp(){
         if(frame == 1) rend.sprite = sprites[10];
     }
 
     private void StandDown(){
         if(frame == 1) rend.sprite = sprites[1];
     }
 
     private void StandLeft(){
         if(frame == 1) rend.sprite = sprites[4];
     }
 
     private void StandRight(){
         if(frame == 1) rend.sprite = sprites[7];
     }
 
     public void setSprites(Sprite[] sprites){
         this.sprites = sprites;
     }
 
     public void changeAnimation(string animation){
         frame = 0;
         currentAnimation = animation;
     }
 }

Answer 3

Answer by Xelnath · Feb 28, 2015 at 12:36 PM

It might help if you look at:

EditorCurveBinding[] _Curves2 = AnimationUtility.GetObjectReferenceCurveBindings (anim);

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Create a Sprite Animation Clip in Code

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