Unity动态绘制mesh：点，线，面，模型

MeshEdito一：3D网格线段   

给定起始点以及结束点的两个vector3，以及为其指定材质和半径，便可以画出一条线段，效果如下：
 

部分代码：

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bool trade = false ;  //线段所在轴           float Xgap = Mathf.Abs(startPositon.x - endPosition.x);           float Ygap = Mathf.Abs(startPositon.y - endPosition.y);           float Zgap = Mathf.Abs(startPositon.z - endPosition.z);               Vector3[] _Vertices = new Vector3[24];           if (Xgap >= Ygap && Xgap >= Zgap)           {               Vector3 middle;  //线段方向对调（有时候需要获取线段位置时必须获取它的开始位置）               if (startPositon.x < endPosition.x)               {                   middle = startPositon;                   startPositon = endPosition;                   endPosition = middle;                   trade = true ;               }  //创建线段               _Vertices = new Vector3[24]               {                   new Vector3(startPositon.x, startPositon.y, startPositon.z + radius),                   new Vector3(startPositon.x, startPositon.y + Mathf.Sin(3.14f/180*30) * radius, startPositon.z + Mathf.Cos(3.14f/180*30) * radius),                   new Vector3(startPositon.x, startPositon.y + Mathf.Sin(3.14f/180*60) * radius, startPositon.z + Mathf.Cos(3.14f/180*60) * radius),                   new Vector3(startPositon.x, startPositon.y + radius, startPositon.z),                   new Vector3(startPositon.x, startPositon.y + Mathf.Sin(3.14f/180*60) * radius, startPositon.z - Mathf.Cos(3.14f/180*60) * radius),                   new Vector3(startPositon.x, startPositon.y + Mathf.Sin(3.14f/180*30) * radius, startPositon.z - Mathf.Cos(3.14f/180*30) * radius),                   new Vector3(startPositon.x, startPositon.y, startPositon.z - radius),                   new Vector3(startPositon.x, startPositon.y - Mathf.Sin(3.14f/180*30) * radius, startPositon.z - Mathf.Cos(3.14f/180*30) * radius),                   new Vector3(startPositon.x, startPositon.y - Mathf.Sin(3.14f/180*60) * radius, startPositon.z - Mathf.Cos(3.14f/180*60) * radius),                   new Vector3(startPositon.x, startPositon.y - radius, startPositon.z),                   new Vector3(startPositon.x, startPositon.y - Mathf.Sin(3.14f/180*60) * radius, startPositon.z + Mathf.Cos(3.14f/180*60) * radius),                   new Vector3(startPositon.x, startPositon.y - Mathf.Sin(3.14f/180*30) * radius, startPositon.z + Mathf.Cos(3.14f/180*30) * radius),                       new Vector3(endPosition.x, endPosition.y, endPosition.z + radius),                   new Vector3(endPosition.x, endPosition.y + Mathf.Sin(3.14f/180*30) * radius, endPosition.z + Mathf.Cos(3.14f/180*30) * radius),                   new Vector3(endPosition.x, endPosition.y + Mathf.Sin(3.14f/180*60) * radius, endPosition.z + Mathf.Cos(3.14f/180*60) * radius),                   new Vector3(endPosition.x, endPosition.y + radius, endPosition.z),                   new Vector3(endPosition.x, endPosition.y + Mathf.Sin(3.14f/180*60) * radius, endPosition.z - Mathf.Cos(3.14f/180*60) * radius),                   new Vector3(endPosition.x, endPosition.y + Mathf.Sin(3.14f/180*30) * radius, endPosition.z - Mathf.Cos(3.14f/180*30) * radius),                   new Vector3(endPosition.x, endPosition.y, endPosition.z - radius),                   new Vector3(endPosition.x, endPosition.y - Mathf.Sin(3.14f/180*30) * radius, endPosition.z - Mathf.Cos(3.14f/180*30) * radius),                   new Vector3(endPosition.x, endPosition.y - Mathf.Sin(3.14f/180*60) * radius, endPosition.z - Mathf.Cos(3.14f/180*60) * radius),                   new Vector3(endPosition.x, endPosition.y - radius, endPosition.z),                   new Vector3(endPosition.x, endPosition.y - Mathf.Sin(3.14f/180*60) * radius, endPosition.z + Mathf.Cos(3.14f/180*60) * radius),                   new Vector3(endPosition.x, endPosition.y - Mathf.Sin(3.14f/180*30) * radius, endPosition.z + Mathf.Cos(3.14f/180*30) * radius)               };           }

 



同时，提供起点终点以及弯曲弧度还能画出一段曲线，如下：

部分代码：

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if (length % 2 != 0) length += 1;           //曲线过渡点           Vector3 LostMedium;           Vector3 NewMedium;           //曲线平均衰减值           float xD = (endPosition.x - startPositon.x) / length;           float yD = (endPosition.y - startPositon.y) / length;           float zD = (endPosition.z - startPositon.z) / length;           //曲线减速衰减值           float XWeakValue = radian.x / (length / 2);           float YWeakValue = radian.y / (length / 2);           float ZWeakValue = radian.z / (length / 2);           //曲线弧度延伸值           float XBendingValue = 0;           float YBendingValue = 0;           float ZBendingValue = 0;               GameObject _Line = new GameObject( "Curve" );           _Line.transform.localScale = Vector3.one;           _Line.transform.position = Vector3.zero;           _Line.transform.rotation = Quaternion.Euler(0, 0, 0);               XBendingValue += radian.x;           YBendingValue += radian.y;           ZBendingValue += radian.z;           LostMedium = startPositon;           NewMedium = new Vector3(startPositon.x + xD + XBendingValue, startPositon.y + yD + YBendingValue, startPositon.z + zD + ZBendingValue);           Draw(LostMedium, NewMedium, lineMaterial, radius).transform.SetParent(_Line.transform);  //循环画线段           for ( int i = 2; i <= length / 2; i++)           {               XBendingValue += (radian.x - XWeakValue * (i - 1));               YBendingValue += (radian.y - YWeakValue * (i - 1));               ZBendingValue += (radian.z - ZWeakValue * (i - 1));               LostMedium = NewMedium;               NewMedium = new Vector3(startPositon.x + xD * i + XBendingValue, startPositon.y + yD * i + YBendingValue, startPositon.z + zD * i + ZBendingValue);               Draw(LostMedium, NewMedium, lineMaterial, radius).transform.SetParent(_Line.transform);           }