[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： Ar9nBJ`  
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图片:2.jpg

Q.-*7h8  

关键点说几个： ;Kxbg>U  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） q?{}3 dPC  
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 Rz <OF^Iy  
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 V*n==Nb5L  

以下是几个重要的函数： K!{5[G  
1.判断点在区域中函数 x/TGp?\g  
2.计算夹角函数 CDg AGy
 
3.转置函数 zok D:c  
4.得到区域中心点，及区域半径函数  y).P=z  
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） ``4wX-y  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Lyoor1   
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single WYIw5jzC  
   cax = x2 - x1 w+UV"\!G)Q  
   cay = y2 - y1 )s")y  
   cbx = x2 - x3 7 ^I:=qc72  
   cby = y2 - y3 E&2tBrAq  
   mo_jj = cax * cbx + cay * cby vZjZb(jlN  
   mo_ca = Sqr(cax * cax + cay * cay) 9U<Hf32  
   mo_cb = Sqr(cbx * cbx + cby * cby) _vrWj<wyf  
   cos_acb = mo_jj / (mo_ca * mo_cb) womq^h6  
   'ff_cos = cos_acb 
F,}s$v  
   If cos_acb >= 1 Then C ?7X"~~  
   nn = 0 }B)jq`a?|\  
   ElseIf cos_acb <= -1 Then }p'8w\C$  
   nn = 3.14159265258979 n6f3H\/P&  
   Else 4#rAm"H  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) !Yh}H<w0  
   End If (([I]q  
   'ff_angle = nn 1r4,XSk  
   ff_angle = nn * 180 / 3.14159265258979 9YC&&0 C@  
End Function

'判断点在区域内函数 Fk$@Yy+}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 .cR*P<3O
 
Dim aob, boc, cod, doa, sum As Single (!n-Age  
  If ppx = p1x And ppy = p1y Then N$Hqa^!'T  
     point_in = True ryEvmWYu  
     Exit Function 1g i}H)  
  End If Zr"dOj$Jf  
  If ppx = p2x And ppy = p2y Then v*DFiCQD  
     point_in = True A?S
m-#n{  
     Exit Function bOXh|u_3i  
  End If *|'}v[{v^9  
   If ppx = p3x And ppy = p3y Then +"=~o5k3Q  
     point_in = True cdsQ3o  
     Exit Function dofR)"<p,^  
  End If  y h-9u  
     Gg+YfY_  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) c~oe,9  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) =g2\CIlVU6  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Fe4esg-B<  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) '%Dg{ zL  
    sum = aob + boc + cod + doa WguV{#=H  
    If 360.01 > sum And sum > 359.99 Then M,{<TpCx  
       point_in = True SRk7gfP*q  
    Else AzX(~Qc  
       point_in = False ,CW%JIM  
    End If *]9XDc]{j1  
End Function

'得到点半径,得到交点坐标函数 EM~7#Y  
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() Ug`
  
    '求得中心点坐标 /K&wr6  
Dim tt As String ,,2_/u\"/i  
Dim rt(3) As Single %,E7vYjT%  
    '判断是否平行 u"joCZ7`kG  
   acx = p3x - p1x dK7 ^  
   acy = p3y - p1y Xa6qvg7/  
   bdx = p4x - p2x dW6Q)Rfi  
   bdy = p4y - p2y '|+=B u  
   If acx * bdy = acy * bdx Then ,|>nF;.Y  
      rt(0) = 0 3~8AcX@  
      Exit Function ;WPI+`-  
   Else IT7:QEfKU  
      '判断斜率存在否 ~l@%=/m  
      If p1x = p3x And p2x <> p4x Then 0MhxFoFO  
         tt = "ac_n_bd_y" P:vX }V |[  
      ElseIf p1x <> p3x And p2x = p4x Then kfIbgya  
         tt = "ac_y_bd_n" 6UtG-WHHt  
      ElseIf p1x <> p3x And p2x <> p4x Then _c,&\ wl$  
         tt = "ac_y_bd_y" m';|}z'  
      End If Kjvs@~6t  
    Select Case tt Pyit87h{  
         Case "ac_n_bd_y" ;+!xZOmm  
            'bd线段方程 Z'Zd[."s  
            k_bd = bdy / bdx gB'`I(q5.  
            b_bd = p2y - k_bd * p2x A` oa|k!U  
            p_x = p1x pzYG?9cwz  
            p_y = k_bd * p_x + b_bd cbY3mSfn*  
         Case "ac_y_bd_n" <4SF~i  
            'ac线段方程 `_6@3-%  
            k_ac = acy / acx ROcY'-  
            b_ac = p1y - k_ac * p1x ">0 /8]l  
            p_x = p2x g8B&u u #  
            p_y = k_ac * p_x + b_ac <:H  
        Case "ac_y_bd_y"
(p'/p  
           'ac，bd线段都要求 :1%VZvWk*  
           k_ac = acy / acx UeC 81*XZ  
           b_ac = p1y - k_ac * p1x !k ;[^>  
           k_bd = bdy / bdx &7JEb]1C  
           b_bd = p2y - k_bd * p2x an #jZ[  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) +X{cN5Y K  
           p_y = k_ac * p_x + b_ac F5Cqv0HV  
        End Select k$Nx6?8E  
      rt(1) = p_x oKZ[0(4<  
      rt(2) = p_y F\I5fNs@  
     i]V F'tG  
'计算最大半径 pyGFDB5_P  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 75' Ua$  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) N2M?5fF  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y)  ||bA  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ](idf(j  
Dim bb(5) As Single _ +u sn.  
  bb(1) = rr1 t>fA!K%{  
  bb(2) = rr2 })Ix.!p  
  bb(3) = rr3 xUV_2n+  
  bb(4) = rr4 $,!dan<eA  
  nb = rr1 !^rITiy  
For i = 1 To 4 U]1>?,Nk'3  
    If nb <= bb(i) Then >:(6{}b  
       nb = bb(i) LD7? .  
    End If AqTR.}H  
Next i h/fb<jIP1  
    rt(0) = Sqr(nb) )L&n)w  
    rr = rt() _CYmG"mY  
  End If ]a&x'  
         xV }:M  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ]oWZ{#r2  

q4#f *]  
有热压工艺方面的人才或者资料分享下； f 7QUZb\  
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 p'w"V6k('~  

高手真多！

楼主威武霸气.