[分享]绝对随机网点分布（excel之vba） [复制链接]

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： OkaNVTB  
8\/$cP"<^  

描述:请输入描述

图片:2.jpg

~dc~<hK  

关键点说几个： zt|DHVy  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 1rLK1X  
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 yrVk$k#6}  
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 3BzC'nplm  

以下是几个重要的函数： 8%EauwAx  
1.判断点在区域中函数 WAqH*LB  
2.计算夹角函数 mx3p/p  
3.转置函数 D@ 4sq^|2  
4.得到区域中心点，及区域半径函数 [.j&~\AG  
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） ;xxu,  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Pof]9qE-y  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single T7qE 2  
   cax = x2 - x1 NPjNkpWm&=  
   cay = y2 - y1 %&}gt+L(M  
   cbx = x2 - x3 LzGS
N  
   cby = y2 - y3 Bb9/nsbE  
   mo_jj = cax * cbx + cay * cby m[8?d~  
   mo_ca = Sqr(cax * cax + cay * cay) |B~^7RHXo  
   mo_cb = Sqr(cbx * cbx + cby * cby) $3)Z>p  
   cos_acb = mo_jj / (mo_ca * mo_cb) :xy4JRcF  
   'ff_cos = cos_acb 4RyQ^vL  
   If cos_acb >= 1 Then O~DdM
W  
   nn = 0 R8N*. [  
   ElseIf cos_acb <= -1 Then NSkIzaNY  
   nn = 3.14159265258979 PSREQK@}E  
   Else caD)'FSES  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 9AP."RV  
   End If U#>K(  
   'ff_angle = nn UR<a7j"@2  
   ff_angle = nn * 180 / 3.14159265258979 ,%<ICusZ  
End Function

'判断点在区域内函数 P TMJ.;  
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 G/4~_\YMq  
Dim aob, boc, cod, doa, sum As Single #M@Ki1  
  If ppx = p1x And ppy = p1y Then 0'zX6%  
     point_in = True eJ+@<+vr;x  
     Exit Function L=9^Y/8Q  
  End If n7VQi+i'  
  If ppx = p2x And ppy = p2y Then u{8:VX  
     point_in = True hOj(*7__  
     Exit Function 'y%*W:O  
  End If " 3tk"#.#  
   If ppx = p3x And ppy = p3y Then ,-`A6ehg  
     point_in = True fjh,e  
     Exit Function nxhn|v  
  End If jUGk=/*]e  
     *_@t$W  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) p-f"4vH  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) "1z#6vw5a  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) T )!kJ;vc  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) %_. fEFy07  
    sum = aob + boc + cod + doa ?.Lq`~T`  
    If 360.01 > sum And sum > 359.99 Then ?5j}&Y3  
       point_in = True AQjf\i  
    Else ^,{ r[}  
       point_in = False S1U>Q~ZPA  
    End If $SfYO!n7Q  
End Function

'得到点半径,得到交点坐标函数 BPd *@l  
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() nO `R++  
    '求得中心点坐标 qZYh^\  
Dim tt As String =^mBj?(V7  
Dim rt(3) As Single aSt:G*a"  
    '判断是否平行 o}e]W,  
   acx = p3x - p1x n+D93d9LP  
   acy = p3y - p1y !0X/^Xv@=  
   bdx = p4x - p2x o?/fObV@(  
   bdy = p4y - p2y ,A[NcFdCB  
   If acx * bdy = acy * bdx Then F*p@hl  
      rt(0) = 0 UTVqoCHA  
      Exit Function Kb~i9x&  
   Else <2t%<
<%  
      '判断斜率存在否 "@UyU
L  
      If p1x = p3x And p2x <> p4x Then Jvr`9<`  
         tt = "ac_n_bd_y" [7Liken  
      ElseIf p1x <> p3x And p2x = p4x Then WSqo\]  
         tt = "ac_y_bd_n" ypWhH  
      ElseIf p1x <> p3x And p2x <> p4x Then qnJs,"sn  
         tt = "ac_y_bd_y" h~5gHx/a  
      End If A7R
[~  
    Select Case tt Bk@&k}0  
         Case "ac_n_bd_y" gB])@O%/  
            'bd线段方程 !@[@&.  
            k_bd = bdy / bdx `{H!V~42  
            b_bd = p2y - k_bd * p2x nG~^-
c+  
            p_x = p1x e4<St`K  
            p_y = k_bd * p_x + b_bd d@ef+-  
         Case "ac_y_bd_n" K>_~|ZN1C8  
            'ac线段方程 |Ge!;v  
            k_ac = acy / acx ?0?+~0sI  
            b_ac = p1y - k_ac * p1x Zp+orc7  
            p_x = p2x {w mP  
            p_y = k_ac * p_x + b_ac Y2W{?<99  
        Case "ac_y_bd_y" #{5h6IC  
           'ac，bd线段都要求 gg@Ew4L&  
           k_ac = acy / acx 9#1
Jie$  
           b_ac = p1y - k_ac * p1x (p(-
E  
           k_bd = bdy / bdx Lklb  
           b_bd = p2y - k_bd * p2x R= .UbY  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) O'S9y  
           p_y = k_ac * p_x + b_ac c/}-pZn<  
        End Select Ws:+P~8  
      rt(1) = p_x A'suZpL  
      rt(2) = p_y uQ3W =  
     }*c[}VLN  
'计算最大半径 ;aDYw [  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) KouIzWf.  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) zKFiCP K  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) %<\tN^rP  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) /! M%9gu  
Dim bb(5) As Single Cf.(/5X  
  bb(1) = rr1 QeQ
xz1  
  bb(2) = rr2 9s#*~[E*  
  bb(3) = rr3 3XhLn/@  
  bb(4) = rr4 : 2A\X' @  
  nb = rr1 P.3kcZ   
For i = 1 To 4 , RU   
    If nb <= bb(i) Then *~^M_wej  
       nb = bb(i) VKu|=m2vB  
    End If ?'U@oz8 B  
Next i \Wb3JQ)  
    rt(0) = Sqr(nb) * & : J  
    rr = rt() },,K6*P  
  End If n!L}4Nmp  
         bq z*90  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  g]U!]  

$aj:\A0f  
有热压工艺方面的人才或者资料分享下； V(OD^GU  
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 :7pt
=IA  

高手真多！

楼主威武霸气.