/// <summary>
/// 添加节点
/// </summary>
/// <param name="newNode"></param>
public void AddNode(Vector3 pos, float c)
{
Node node;
if (nodeList.Count < 1)
{
node = new Node(pos);
}
else
{
node = new Node(pos, nodeList[nodeList.Count - 1]);
}
nodeList.Add(node);
if (nodeList.Count > 1)
{
CurveSegement a = new CurveSegement(endNode, node, this);
a.c = c;
segmentList.Add(a);
CaculateTangents(segmentList.Count - 1); // 计算新加入的曲线段起始切线
}
else // 加入第一个节点
{
startNode = node;
}
endNode = node;
}
/// <summary>
/// 计算曲线段首尾切线
/// </summary>
/// <param name="index"></param>
private void CaculateTangents(int index)
{
CurveSegement segement = segmentList[index];
if (index == 0)
{
segement.startTangents = segement.endNode.pos - segement.endNode.pos;
segement.endTangents = segement.endNode.pos - segement.startNode.pos;
return;
}
CurveSegement preSegement = segmentList[index - 1];
segement.startTangents = 0.5f * (1 - segement.c) * (segement.endNode.pos - preSegement.endNode.pos);
segement.endTangents = segement.endNode.pos - segement.startNode.pos;
preSegement.endTangents = segement.startTangents;
}