[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： zn$Ld,  
>Nl~"J|]q  
p&doQh
  

关键点说几个： S9055`v5  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） )3"
>%1R  
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 d}J#wT  
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 dh`A(B{hfc  

以下是几个重要的函数： 4yy yXj  
1.判断点在区域中函数 /^ 7 9|$E  
2.计算夹角函数 oC>~r1.j  
3.转置函数 )+R3C%  
4.得到区域中心点，及区域半径函数 @cNI|T  
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） !XceiQu  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 K?WqA
VK  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single xSZw,  
   cax = x2 - x1 Cvy;O~)  
   cay = y2 - y1 '.yr8  
   cbx = x2 - x3 <3OV  
   cby = y2 - y3 L1K_|
X  
   mo_jj = cax * cbx + cay * cby dq&d>f1  
   mo_ca = Sqr(cax * cax + cay * cay) 2Ta F7Jn  
   mo_cb = Sqr(cbx * cbx + cby * cby) ]ORat.*0[T  
   cos_acb = mo_jj / (mo_ca * mo_cb) VNPdL  
   'ff_cos = cos_acb ST.W{:X   
   If cos_acb >= 1 Then ttrp|(  
   nn = 0 hw2Hn   
   ElseIf cos_acb <= -1 Then S?$T=[yY)  
   nn = 3.14159265258979 UzXbaQQ2g  
   Else TA5M4r6  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) dno*Usx5d0  
   End If B$j,:^  
   'ff_angle = nn iqYc&}k,  
   ff_angle = nn * 180 / 3.14159265258979 G<DUy^$i  
End Function

'判断点在区域内函数 A`Nb"N$H13  
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 LV0{~g(!%  
Dim aob, boc, cod, doa, sum As Single *V}}3Degh  
  If ppx = p1x And ppy = p1y Then HN! l-z  
     point_in = True nq;)!Wry  
     Exit Function :OM>z4mQ  
  End If ] $*cmk(Y  
  If ppx = p2x And ppy = p2y Then t
uSgh!  
     point_in = True _{aVm&^kA  
     Exit Function @lI/g  
  End If 9S^-qQH3}  
   If ppx = p3x And ppy = p3y Then l=yO]a\QZ  
     point_in = True ?{V[b
m  
     Exit Function F=H=[pSe  
  End If s_N!6$tS   
     qeYr=%)c  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) [+GG Wo  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) *V/SI E*8  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) zob-z=='  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) zc"eSy< w$  
    sum = aob + boc + cod + doa n3w2&  
    If 360.01 > sum And sum > 359.99 Then Sn]A0J_  
       point_in = True 5`J. ic  
    Else C-7.Sa  
       point_in = False qJ!xhf1  
    End If i || /=ai  
End Function

'得到点半径,得到交点坐标函数 #q-t!C%E  
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() @`3)?J[w  
    '求得中心点坐标 Y#G '[N>  
Dim tt As String 5ZPl`[He  
Dim rt(3) As Single 3^Ex_
jeB  
    '判断是否平行 #Rs7Ieu+  
   acx = p3x - p1x nV<YwqK  
   acy = p3y - p1y h)w<{/p(  
   bdx = p4x - p2x r8qee$^M  
   bdy = p4y - p2y czj[U|eB}=  
   If acx * bdy = acy * bdx Then Z?~7#F~Z`  
      rt(0) = 0 g+f{I'j  
      Exit Function jE{z4en  
   Else A;kB"Tx  
      '判断斜率存在否 (Az^st/_  
      If p1x = p3x And p2x <> p4x Then IJ!UKa*o%  
         tt = "ac_n_bd_y" a*=e 3nS  
      ElseIf p1x <> p3x And p2x = p4x Then 9i"3R0HN  
         tt = "ac_y_bd_n" Yy&0b(m U  
      ElseIf p1x <> p3x And p2x <> p4x Then `jJb) z3D  
         tt = "ac_y_bd_y" Jyd%!v  
      End If d{0>R{u
ac  
    Select Case tt E\QSU88^  
         Case "ac_n_bd_y" k&Sg`'LG8  
            'bd线段方程 %K zURv  
            k_bd = bdy / bdx '?QZ7A  
            b_bd = p2y - k_bd * p2x JL<}9K  
            p_x = p1x #pf}q+A  
            p_y = k_bd * p_x + b_bd v^e[`]u(  
         Case "ac_y_bd_n" c;j]/R$i  
            'ac线段方程 fUa`YryQ  
            k_ac = acy / acx Dj[D|%9a  
            b_ac = p1y - k_ac * p1x 1@/+ c  
            p_x = p2x $XJe)  
            p_y = k_ac * p_x + b_ac Tux~4W  
        Case "ac_y_bd_y" a+MC[aFr  
           'ac，bd线段都要求 <{'':/tXI  
           k_ac = acy / acx HzWZQ6o  
           b_ac = p1y - k_ac * p1x ==$Ox6.  
           k_bd = bdy / bdx %bddR;c  
           b_bd = p2y - k_bd * p2x KxY|:-"Tt  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) fz:F*zT1  
           p_y = k_ac * p_x + b_ac ek.L(n,J|  
        End Select r8@:Ko= a  
      rt(1) = p_x 2(UT;PSI  
      rt(2) = p_y :qI myaGQ  
     }O_6wi  
'计算最大半径 m(9E{;  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) keX0br7u_  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ak<?Eu9rV  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 7^S&g.A  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) K~[/n<ks  
Dim bb(5) As Single SMnbI
.0  
  bb(1) = rr1 nPKf~|\1{  
  bb(2) = rr2 o8bVz2E  
  bb(3) = rr3 +W-sb5)  
  bb(4) = rr4 B~z& "`  
  nb = rr1 X^"95Ic  
For i = 1 To 4 :I1bGa&I  
    If nb <= bb(i) Then r0_3`;H  
       nb = bb(i) o6'`W2P  
    End If &bTadd%0  
Next i ZQ@^(64  
    rt(0) = Sqr(nb) F+9|D  
    rr = rt() $lUZm\R|k  
  End If ,VbP$1t  
         Pf]L`haGN  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ":tQYo]d  

~f;d3dJ]/  
有热压工艺方面的人才或者资料分享下； 9YwK1[G6/  
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 Yx>=(B  

高手真多！

楼主威武霸气.