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UGUI绘制动态曲线

2019年09月09日  | 移动技术网IT编程  | 我要评论

本文实例为大家分享了ugui绘制动态曲线的具体代码，供大家参考，具体内容如下

前言

等有空再补详细说明，先上代码。看官自行阅读

代码

uicurvedata 类，用于存放点数据的基础结构。

public class uicurvedata
{
 #region [fields]
 public list<vector2> postion = new list<vector2>();
 public color ccolor;
 public float thickness = 1;
 #endregion

 #region [publictools]
 public void addpos(float varx, float vary)
 {
  addpos(new vector2(varx, vary));
 }
 public void addpos(vector2 varv2)
 {
  postion.add(varv2);
 }
 #endregion

}

uicurve 负责构建顶点数据，mesh。

public class uicurve : maskablegraphic
{
 #region [fields]
 private dictionary<int, uicurvedata> mcurvedata = new dictionary<int, uicurvedata>();
 #endregion

 #region [inherit]
 protected override void onpopulatemesh(vertexhelper varverheler)
 {
  varverheler.clear();

  foreach (var tempkvp in mcurvedata)
  {
   var tempuicurvedata = tempkvp.value;
   if (tempuicurvedata.postion.count < 2)
   {
    continue;
   }
   for (int i = 1; i < tempuicurvedata.postion.count; i++)
   {
    uivertex[] verts = new uivertex[4];

    float x1 = tempuicurvedata.postion[i - 1].x;
    float y1 = tempuicurvedata.postion[i - 1].y;
    float x2 = tempuicurvedata.postion[i].x;
    float y2 = tempuicurvedata.postion[i].y;

    float xd = (y2 - y1) / mathf.sqrt(mathf.pow(x2 - x1, 2) * mathf.pow(y2 - y1, 2)) * tempkvp.value.thickness / 2;
    float yd = (x2 - x1) / mathf.sqrt(mathf.pow(x2 - x1, 2) * mathf.pow(y2 - y1, 2)) * tempkvp.value.thickness / 2;

    int idx = 0;
    verts[idx].position = new vector3(tempuicurvedata.postion[i - 1].x - xd, tempuicurvedata.postion[i - 1].y + yd);
    verts[idx].color = tempuicurvedata.ccolor;
    verts[idx].uv0 = vector2.zero;

    idx++;
    verts[idx].position = new vector3(tempuicurvedata.postion[i].x - xd, tempuicurvedata.postion[i].y + yd);
    verts[idx].color = tempuicurvedata.ccolor;
    verts[idx].uv0 = vector2.zero;

    idx++;
    verts[idx].position = new vector3(tempuicurvedata.postion[i].x + xd, tempuicurvedata.postion[i].y - yd);
    verts[idx].color = tempuicurvedata.ccolor;
    verts[idx].uv0 = vector2.zero;

    idx++;
    verts[idx].position = new vector3(tempuicurvedata.postion[i - 1].x + xd, tempuicurvedata.postion[i - 1].y - yd);
    verts[idx].color = tempuicurvedata.ccolor;
    verts[idx].uv0 = vector2.zero;

    varverheler.adduivertexquad(verts);
   }
  }

 }
 #endregion

 #region [publictools]
 public void addcurvedata(int varid, uicurvedata varcurvedata)
 {
  mcurvedata.add(varid, varcurvedata);
  setalldirty();
 }
 public void clear()
 {
  mcurvedata.clear();
  setalldirty();
 }
 public void removepointids(params int[] varremovepoints)
 {
  list<int> templ = new list<int>();
  templ.addrange(varremovepoints);
  removepointids(templ);
 }
 public void removepointids(list<int> varremovepoints)
 {
  foreach (var i in varremovepoints)
  {
   if (!mcurvedata.containskey(i)) continue;
   mcurvedata.remove(i);
  }
  setalldirty();
 }
 #endregion
}

测试使用

public class testcurve : monobehaviour
{
 void start()
 {
  var tempcurve = this.gameobject.addcomponent<uicurve>();
  uicurvedata tempcd = new uicurvedata();
  tempcd.ccolor = color.yellow;
  tempcd.thickness = 2;
  for (int i = 0; i < 360; i++)
  {
   tempcd.addpos(i * 2,(float)mathf.cos(i));
  }
  tempcurve.addcurvedata(1,tempcd);
 }
}

将该脚本挂在 canvas 上，运行会看到

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