绝对随机网点分布（excel之vba）

想学习的请研究下，直接给程序就没意思了，由于公司想做一套导光板的模具，没有现成的软件可用，就自己做了较简单的程序，虽然简单，但基本功能已经满足了导光板网点设计的要求；具备功能：任意多边形区域；含有光轴，且可以根据光源调整；网点密度可沿光轴方向调整，效果图如下：

[attachment=47680]

safeng1122	2013-04-08 13:15
关键点说几个： ]wkSAi5z* 1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） `nd#< w> 2.需要定义光轴的方向；简便的方法就是指定光源坐标，及网点区域坐标，这样光轴就确定了 68&6J's; 3.网点区域密度可调；把区域分成若干小块，每块的密度不同即可 <\|KKv5[

safeng1122	2013-04-08 13:19
以下是几个重要的函数： 2FZ0c/[& 1.判断点在区域中函数 yNhscAMNn 2.计算夹角函数 `}k&HRn 3.转置函数 q G :jnl 4.得到区域中心点，及区域半径函数 / K_e;(Y_ 5.再有就是若干个点抽取其中一部分；或者采用随机分布（该方法会有重合点，所以没采用） v@$evmA 6.文件开启与关闭，这个最常见了，就不说了

safeng1122

2013-04-08 13:21

'计算夹角函数
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single
   cax = x2 - x1
   cay = y2 - y1
   cbx = x2 - x3
   cby = y2 - y3
   mo_jj = cax * cbx + cay * cby
   mo_ca = Sqr(cax * cax + cay * cay)
   mo_cb = Sqr(cbx * cbx + cby * cby)
   cos_acb = mo_jj / (mo_ca * mo_cb)
   'ff_cos = cos_acb
   If cos_acb >= 1 Then
   nn = 0
   ElseIf cos_acb <= -1 Then
   nn = 3.14159265258979
   Else
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1)
   End If
   'ff_angle = nn
   ff_angle = nn * 180 / 3.14159265258979
End Function

safeng1122

2013-04-08 13:21

'判断点在区域内函数
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean
Dim aob, boc, cod, doa, sum As Single
  If ppx = p1x And ppy = p1y Then
     point_in = True
     Exit Function
  End If
  If ppx = p2x And ppy = p2y Then
     point_in = True
     Exit Function
  End If
   If ppx = p3x And ppy = p3y Then
     point_in = True
     Exit Function
  End If

    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y)
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y)
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y)
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y)
    sum = aob + boc + cod + doa
    If 360.01 > sum And sum > 359.99 Then
       point_in = True
    Else
       point_in = False
    End If
End Function

safeng1122

2013-04-08 13:23

'得到点半径,得到交点坐标函数
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single()
    '求得中心点坐标
Dim tt As String
Dim rt(3) As Single
    '判断是否平行
   acx = p3x - p1x
   acy = p3y - p1y
   bdx = p4x - p2x
   bdy = p4y - p2y
   If acx * bdy = acy * bdx Then
      rt(0) = 0
      Exit Function
   Else
      '判断斜率存在否
      If p1x = p3x And p2x <> p4x Then
         tt = "ac_n_bd_y"
      ElseIf p1x <> p3x And p2x = p4x Then
         tt = "ac_y_bd_n"
      ElseIf p1x <> p3x And p2x <> p4x Then
         tt = "ac_y_bd_y"
      End If
    Select Case tt
         Case "ac_n_bd_y"
            'bd线段方程
            k_bd = bdy / bdx
            b_bd = p2y - k_bd * p2x
            p_x = p1x
            p_y = k_bd * p_x + b_bd
         Case "ac_y_bd_n"
            'ac线段方程
            k_ac = acy / acx
            b_ac = p1y - k_ac * p1x
            p_x = p2x
            p_y = k_ac * p_x + b_ac
        Case "ac_y_bd_y"
           'ac，bd线段都要求
           k_ac = acy / acx
           b_ac = p1y - k_ac * p1x
           k_bd = bdy / bdx
           b_bd = p2y - k_bd * p2x
           p_x = -(b_bd - b_ac) / (k_bd - k_ac)
           p_y = k_ac * p_x + b_ac
        End Select
      rt(1) = p_x
      rt(2) = p_y

'计算最大半径
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y)
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y)
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y)
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y)
Dim bb(5) As Single
  bb(1) = rr1
  bb(2) = rr2
  bb(3) = rr3
  bb(4) = rr4
  nb = rr1
For i = 1 To 4
    If nb <= bb(i) Then
       nb = bb(i)
    End If
Next i
    rt(0) = Sqr(nb)
    rr = rt()
  End If

End Function

lifei0715	2013-04-08 19:15
高手啊.人才啊.

safeng1122	2013-04-09 10:40
lifei0715:高手啊.人才啊. (2013-04-08 19:15) zXU{p\;)\ >MY.Fr#.m 有热压工艺方面的人才或者资料分享下； Z3~*R7G8> 我公司主要做透镜类产品，现在有客户要审核我公司的导光膜工艺，头疼 tskODM0Zf

windcgp86	2013-04-10 21:08
高手真多！

allansweruni	2013-04-11 15:16
楼主威武霸气.

safeng1122	2013-04-12 10:48
推荐大家多学习excel ，尤其是vba TZyQOjUu 真的可以方便做很多事情 `+;oo B 有人就告诉我，高管几乎都是玩excel很溜

townyee	2013-04-13 23:10
学习了，楼主高手~~~~

lengye	2013-04-15 14:48
用VB写的程序？？？

safeng1122	2013-04-15 16:57
算是VB；excel vba J}KktD@!O vb会的应该都能看懂

llanshan	2013-05-07 13:56
來參考看看~~呼呼 =>%%]0

jian0792	2013-05-08 14:02
真是不简单，学习一下

safeng1122	2013-06-28 14:12
同学们可以下载演示了

safeng1122	2013-06-28 14:30
16楼有下载链接了 jhM\|gV& 有需要的的请联系我

renu	2013-07-01 14:41
可以学习学习!

llanshan	2013-08-29 11:41
真的是高手,但是我只是使用者, ovFfTP<3V 不會寫程式,有困難,而且若是直徑大小變化的話, h1)\.F4G 程式就不一樣了?

raygenjang	2014-07-06 13:19
wokanyixia

011king	2014-07-07 10:38
高手，不过我是看不懂啦

ty_gdl	2014-07-26 23:28
高手学习一下

zzh2118	2015-10-24 15:36
高手，软件怎么买呀

466010236	2016-04-19 10:58
高手，下来学习下

涛霸at你	2018-05-05 13:48
求大佬，帮忙写一份简单的网点分布的程序，我已经有了网点分布公式，我本身一点都不会编程，有偿。希望大佬可以帮我写一份

小板凳	2022-09-21 20:40
高手高手俩会了 `mVH94{+I

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