选择两条线并计算它们之间的角度 [英] select two line and calculate angel between them

问题描述

对于我的项目，我首先需要两条SELECTABLE行.然后是他们在vb.net上的天使
Pleaseee帮帮我
，我可以将autocad或coreldraw工具箱控件导入到我的项目表单中吗?那就是其中著名的角度尺寸.

for my project i need two SELECTABLE line at first & then the angel of them in vb.net
pleaseee help me
,can i import autocad or coreldraw toolbox controls to my project form?thats the famous angular dimension in them

推荐答案

尝试以下链接:

C#的矢量类型

或检查以下代码:
VB.Net代码:

Try the following link :

A Vector Type for C#

Or Check following Code :
VB.Net Code :

Public Shared Function ON_3dVectorAngle(ByVal v0 As On3dVector, ByVal v1 As On3dVector) _
  As Double
  ' Unitize the input vectors
  v0.Unitize()
  v1.Unitize()
  Dim dot As Double = OnUtil.ON_DotProduct(v0, v1)
 
  ' Force the dot product of the two input vectors to 
  ' fall within the domain for inverse cosine, which 
  ' is -1 <= x <= 1. This will prevent runtime 
  ' "domain error" math exceptions.
  If (dot < -1.0) Then dot = -1.0
  If (dot > 1.0) Then dot = 1.0
  Return System.Math.Acos(dot)
End Function

C#代码:

public static double ON_3dVectorAngle(On3dVector v0, On3dVector v1)
{
  // Unitize the input vectors
  v0.Unitize();
  v1.Unitize();
  double dot = OnUtil.ON_DotProduct(v0, v1);
 
  // Force the dot product of the two input vectors to 
  // fall within the domain for inverse cosine, which 
  // is -1 <= x <= 1. This will prevent runtime 
  // "domain error" math exceptions.
  dot = (dot < -1.0 ? -1.0 : (dot > 1.0 ? 1.0 : dot));
 
  return System.Math.Acos(dot);
}

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