[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： N.SV*G @  
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描述:请输入描述

图片:2.jpg

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关键点说几个： <xH! Yskc  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） n^l5M^.  
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 gb[.Ww  
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 yWr&G@>G  

以下是几个重要的函数： Uf?+oc'{  
1.判断点在区域中函数 Z hCjY  
2.计算夹角函数 :cP u  
3.转置函数 Z1(!syg  
4.得到区域中心点，及区域半径函数 K;TTGK  
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） |47 2X&e  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 X-j<fX_  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single X'2%'z<  
   cax = x2 - x1 ^6!8)7b  
   cay = y2 - y1 azTiY@/  
   cbx = x2 - x3 CKU)wJ5t  
   cby = y2 - y3 NpGz y`&b  
   mo_jj = cax * cbx + cay * cby +>%AG&Pc  
   mo_ca = Sqr(cax * cax + cay * cay) bW3Ah?0N  
   mo_cb = Sqr(cbx * cbx + cby * cby) i}))6   
   cos_acb = mo_jj / (mo_ca * mo_cb) *r6v9  
   'ff_cos = cos_acb ^[2siG  
   If cos_acb >= 1 Then sq8O+AWl  
   nn = 0 Kf6D$}  
   ElseIf cos_acb <= -1 Then Lk-h AN{[  
   nn = 3.14159265258979 c&`]O\D-c  
   Else q1/mp){  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 4@M
}5WJ7  
   End If ya;(D 8x)  
   'ff_angle = nn pT;xoe   
   ff_angle = nn * 180 / 3.14159265258979 mVT[:a3  
End Function

'判断点在区域内函数 hCj8y.X|E(  
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 `3dGn.M  
Dim aob, boc, cod, doa, sum As Single }9+Vf'u|l  
  If ppx = p1x And ppy = p1y Then ZP.~Y;Ch;-  
     point_in = True *uF Iw}C/  
     Exit Function
c{i\F D  
  End If 9
}d^ll&  
  If ppx = p2x And ppy = p2y Then qp/nWGj  
     point_in = True asbFNJG{  
     Exit Function 70nBC  
  End If Wtflw>-  
   If ppx = p3x And ppy = p3y Then
mxCqN1:#  
     point_in = True 3X1 U  
     Exit Function ,u.A[{@py  
  End If `>k7^!Ds  
     z+nq<%"'  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 4uv*F:eo  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) p4Xhs@.k  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) //^{u[lr  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) XeAH.i<  
    sum = aob + boc + cod + doa Qgl5Jr.  
    If 360.01 > sum And sum > 359.99 Then _2<d6@}
 
       point_in = True B)&z% +  
    Else tLGNYW!K  
       point_in = False wUzMB]w  
    End If U+@rLQ.-  
End Function

'得到点半径,得到交点坐标函数 *Di ;Gf@  
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() {Ytqs(`   
    '求得中心点坐标 l'"Ici#7Ls  
Dim tt As String 2L7ogyrU/A  
Dim rt(3) As Single H`jvT]  
    '判断是否平行 =UZm4=T  
   acx = p3x - p1x w?M` gl8r  
   acy = p3y - p1y u%nhQ%  
   bdx = p4x - p2x hKN/&P^  
   bdy = p4y - p2y uBo~PiJ2"  
   If acx * bdy = acy * bdx Then oMF[<Xf  
      rt(0) = 0
j$khGR!  
      Exit Function TiSV`V
q  
   Else  *l-F  
      '判断斜率存在否 uSNlI78D  
      If p1x = p3x And p2x <> p4x Then WVh]<?GWXk  
         tt = "ac_n_bd_y" K%NgZ(x(  
      ElseIf p1x <> p3x And p2x = p4x Then IlMst16q5  
         tt = "ac_y_bd_n" F3<Ip~K  
      ElseIf p1x <> p3x And p2x <> p4x Then e `IL7$  
         tt = "ac_y_bd_y" lC=T{rR  
      End If Zex`n:Wl?j  
    Select Case tt 8|IlJiJ~v  
         Case "ac_n_bd_y" 6Vy4]jdT5  
            'bd线段方程 Ly`FU)  
            k_bd = bdy / bdx ^ V8?6E  
            b_bd = p2y - k_bd * p2x 5`1p ?  
            p_x = p1x L7$1rO<  
            p_y = k_bd * p_x + b_bd )|L#i2?:  
         Case "ac_y_bd_n" Yq-7!  
            'ac线段方程 QPp>%iE@  
            k_ac = acy / acx 4Pr@<S"U  
            b_ac = p1y - k_ac * p1x ddvtBAX  
            p_x = p2x J8PZVeWx  
            p_y = k_ac * p_x + b_ac F!ra$5u  
        Case "ac_y_bd_y" fBct%M 3  
           'ac，bd线段都要求 p|'Rm]&jb  
           k_ac = acy / acx 4>te>[  
           b_ac = p1y - k_ac * p1x 
"l 1z@  
           k_bd = bdy / bdx JS0957K  
           b_bd = p2y - k_bd * p2x D P+W*87J  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac)  uE3xzF  
           p_y = k_ac * p_x + b_ac qJEtB;J'  
        End Select ~X1<x4P\  
      rt(1) = p_x Ia*T*qJu  
      rt(2) = p_y ]Kp -2KW
  
     ,:?=j80m  
'计算最大半径 ? -`8w _3  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) -5Ln3\ O@  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) OJPi*i5*  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) T+)#Du  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) d0N/!;  
Dim bb(5) As Single LkUi^1((e  
  bb(1) = rr1 4F?O5&329i  
  bb(2) = rr2 _:?b-44  
  bb(3) = rr3 A<[X@o}92  
  bb(4) = rr4 8Z(\iZ5Rgj  
  nb = rr1 bn0Rv  
For i = 1 To 4 VyxX5Lrj  
    If nb <= bb(i) Then E#mp
j~{-  
       nb = bb(i) |FJc'&)J"  
    End If A,! YXl[  
Next i F}=O Mo:.  
    rt(0) = Sqr(nb) $1;@@LSw  
    rr = rt() '| bHu  
  End If 6gJc?+  
         mA0|W#NB  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  c$52b4=a  

FG6mh,C!  
有热压工艺方面的人才或者资料分享下； 7/GL@H  
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 $J)2E g  

高手真多！

楼主威武霸气.