koobas.hobune.stream
Rotate Bezier Curve around object following mouse position
I am trying to rotate my object towards my mouse position on a radius position which has a Line renderer component as well as a custom bezier curve script that is getting 3 Vector3 points p0, p1, and p2 to trace the curve. (It also take a many vertexes to make the curve smoother).
Here is my Bezier Curve code :
public class BezierCurve : MonoBehaviour
{
public Vector3 p0;
public Vector3 p1;
public Vector3 p2;
public LineRenderer lineRenderer;
[Range(1, 64)]
public int vertexCount = 12;
private void Update()
{
List<Vector3> pointList = new List<Vector3>();
for (float ratio = 0f / vertexCount; ratio <= 1; ratio += 1.0f / vertexCount)
{
Vector3 tangentLineVertex1 = Vector3.Lerp(p0, p1, ratio);
Vector3 tangentLineVertex2 = Vector3.Lerp(p1, p2, ratio);
Vector3 bezierPoint = Vector3.Lerp(tangentLineVertex1, tangentLineVertex2, ratio);
pointList.Add(bezierPoint);
}
lineRenderer.positionCount = pointList.Count;
lineRenderer.SetPositions(pointList.ToArray());
}
}
I am feeding the 3 points from my player object using it's sprite radius as a base for the position :
public class PlayerManager : MonoBehaviour
{
public GameObject shield;
private SpriteRenderer sprite;
[SerializeField]
private float shieldDistance = 0f;
void Start()
{
sprite = GetComponent<SpriteRenderer>();
BezierCurve curve = shield.GetComponent<BezierCurve>();
float x = sprite.bounds.extents.x + shieldDistance;
float y = sprite.bounds.extents.y + shieldDistance;
curve.p0 = new Vector3(0, y + 0.05f, 0f);
curve.p1 = new Vector3(x, y, 0f);
curve.p2 = new Vector3(x + 0.05f, 0, 0f);
}
}
This is what it gives me :
In the screenshot above, I would like the curve to rotate around the red circle following the mouse position.
I tried to rotate my player towards the mouse using the transform.lookAt method but it doesn't rotate my curve along side with it (and I don't want the player to rotate really..) I also tried to apply a Quaternion.Eulers on each of my point and the rotation seems to work but it just goes crazy and never stop rotating even when I am not moving the mouse :
Vector2 b = Camera.main.WorldToViewportPoint(p0);
Vector2 a = (Vector2)Camera.main.ScreenToViewportPoint(Input.mousePosition);
float angle = Mathf.Atan2(a.y - b.y, a.x - b.x) * Mathf.Rad2Deg;
p0 = Quaternion.Euler(new Vector3(0f, 0f, angle)) * p0;
p1 = Quaternion.Euler(new Vector3(0f, 0f, angle)) * p1;
p2 = Quaternion.Euler(new Vector3(0f, 0f, angle)) * p2;
Is there any other way that I could apply a rotation on my 3 points following the mouse position and preferably to have the p1 to be the one that is pointing toward the mouse, so the curve is always "center" to the mouse.
