问如何在统一C#中对线条渲染器进行动画制作
EN

Stack Overflow用户

提问于 2022-12-03 17:38:31

回答 1查看 14关注 0票数 0

有任何方法来添加动画到这个行渲染器吗？我的意思是，我想画一条从第1点到point3的线，这条线应该像一个进度条一样移动。如何在下面的脚本中完成

   public class DrawLineRenderer : MonoBehaviour
    {
        public Transform Point1;
        public Transform Point2;
        public Transform Point3;
        public LineRenderer linerenderer;
        public float vertexCount = 12;
        public float Point2Ypositio = 2;
        // Start is called before the first frame update
        void Start()
        {
            linerenderer.SetWidth(10, 10);
        }

    // Update is called once per frame
    void Update()
    {
       
    }
    public void buttonPress()
    {
         Point2.transform.position = new Vector3((Point1.transform.position.x + Point3.transform.position.x)/2, Point2Ypositio, (Point1.transform.position.z + Point3.transform.position.z) /2);
        var pointList = new List<Vector3>();

        for(float ratio = 0;ratio<=1;ratio+= 1/vertexCount)
        {
            var tangent1 = Vector3.Lerp(Point1.position, Point2.position, ratio);
            var tangent2 = Vector3.Lerp(Point2.position, Point3.position, ratio);
            var curve = Vector3.Lerp(tangent1, tangent2, ratio);

            pointList.Add(curve);
        }

        linerenderer.positionCount = pointList.Count;
        linerenderer.SetPositions(pointList.ToArray());
    }

}

animation

rendering

line

unity3d

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回答 1

Stack Overflow用户

发布于 2022-12-04 03:48:33

若要使用线性插值来绘制线条渲染器，可以使用Lerp()方法在直线点之间进行插值。

以下是如何实现这一目标的示例：

#region Serialized Fields

[SerializeField] private LineRenderer lineRenderer;
[SerializeField] private Transform[] positions;
[SerializeField] [Range(1, 4)] private float animationSpeed = 2f;

#endregion

private int _currentPosition;
private float _interpolation;
private bool _isAnimating;

#region Event Functions

private void Update()
{
    if (!_isAnimating) return;

    var startPoint = positions[_currentPosition].position;
    var endPoint = positions[_currentPosition + 1].position;
    var currentPoint = Vector3.Lerp(startPoint, endPoint, _interpolation);

    lineRenderer.positionCount = _currentPosition + 2;
    lineRenderer.SetPosition(_currentPosition, startPoint);
    lineRenderer.SetPosition(_currentPosition + 1, currentPoint);

    // Increment interpolation value over time
    _interpolation += Time.deltaTime * animationSpeed;

    // If the end of the line has been reached, move to the next position
    if (_interpolation >= 1.0f)
    {
        _interpolation = 0.0f;
        _currentPosition++;

        // Stop animating if all positions have been visited
        if (_currentPosition >= positions.Length - 1)
            _isAnimating = false;
    }
}

#endregion

/// <summary>
///     Resets then starts the animation of the line renderer
/// </summary>
public void ButtonPress()
{
    _isAnimating = true;
    _interpolation = 0;
    _currentPosition = 0;
}