object movement as wave in Unity 3d

Questions & Answers
1

I created a object in unity

GameObject monsterclone = (GameObject)Instantiate(monsterPrefab, floorPosition, Quaternion.identity);

This object should move in a wave style from a specific point to another.

Vector3 nPos = mfloorPos + new Vector3(2f, 0f, 0f);
Vector3 oPos = mfloorPos  + new Vector3(-2f, 0f, 0f);

How can I do it?

2

Try using the Mathf.Sin() function using Time.time as the parameter, and tweak according amplitude, phase, etc.

3

Here’s a WaveLerp function. It works like Lerp(), but with a sinusoidal displacement along the path in the plane given by the ‘up’ vector, and with given amplitude and frequency.

Call the Coroutine with: StartCoroutine(WaveMove(monsterclone.transform, nPos, oPos, 1f));

        IEnumerator WaveMove(Transform obj, Vector3 origin, Vector3 dest, float speed)
        {
                float distance = (dest - origin).magnitude;
                float totalTimeToMove = distance/speed;
   
                float timeElapsed = -Time.deltaTime;
                float fraction = 0f;
   
                while(fraction < 1f) {
                        timeElapsed += Time.deltaTime;
                        fraction = timeElapsed/totalTimeToMove;
                        obj.position = WaveLerp(origin, dest, Vector3.up, 0.5f, 1f, fraction);
                        yield return null;
                }
        }
   
        Vector3 WaveLerp(Vector3 origin, Vector3 dest, Vector3 up, float amplitude, float freq, float fraction) {
                float x = fraction * (dest - origin).magnitude;
                float w = 2*Mathf.PI * freq;
                float y = amplitude * Mathf.Sin(w*x);
   
                Vector3 xDir = (dest - origin).normalized;
                Vector3 yDir = Vector3.Cross(xDir, up).normalized;
   
                Vector3 pathOffset = x * xDir;
                Vector3 waveOffset =  y * yDir;
               
                return origin + pathOffset + waveOffset;
        }