Simple Data-Driven Weapon Animation in Unity 3D

animate.cs

//This is to be used within an existing C# file

//Either assign these in the GUI inspector or elsewhere in your code
public GameObject weapon;         //The object to be animated
public Vector3[] positions;       //The positions the object will animate through (local position)
public Vector3[] rotations;       //The Euler angles of the object to be animated (local Euler angles)
public float[] durations;         //The number of seconds the object takes to reach each position
public float variance;            //The amount of variety in positions between attacks (0f for identical animations every time)

//To animate, call StartCoroutine(Attack())

IEnumerator Attack() {

  for (int i = 0; i < durations.Length; i++) {
  
    float elapsed = 0f;
    float duration = durations[i];
    
    Vector3 startPos = positions[i];
    Vector3 startRot = rotations[i];
    
    bool isEnd = i == positions.Length-1;
    
    Vector3 endPos = isEnd ? positions[0] : positions[i+1] * (1f + Random.Range(-variance, variance));
    Vector3 endRot = isEnd ? rotations[0] : rotations[i+1] * (1f + Random.Range(-variance,variance));
    
    while (elapsed < duration) {
      weapon.transform.localPosition = Vector3.Lerp(startPos, endPos, elapsed/duration);
      weapon.transform.localEulerAngles = Vector3.Lerp(startRot, endRot, elapsed/duration);
      elapsed += Time.deltaTime;
      yield return new WaitForEndOfFrame();
    }
  
  }
  
}

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