[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： zP'pfBgbJW  
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图片:2.jpg

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关键点说几个： |Z|xM  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） IqKXFORiNI  
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 [IA==B7  
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 7
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以下是几个重要的函数： wh+ibH}@!  
1.判断点在区域中函数 FY*0gp  
2.计算夹角函数 $_5v^QL  
3.转置函数 A|Gqjy^;@  
4.得到区域中心点，及区域半径函数 GFkte  
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） 'qS!n  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 XX6)(  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single `"Pd$jW  
   cax = x2 - x1 i.4[]f[/h  
   cay = y2 - y1 kA`qExw%  
   cbx = x2 - x3 HX*U2<^  
   cby = y2 - y3 ['1?'*  
   mo_jj = cax * cbx + cay * cby vdzC2T  
   mo_ca = Sqr(cax * cax + cay * cay) %*=FLtBjo  
   mo_cb = Sqr(cbx * cbx + cby * cby) >z$|O>j  
   cos_acb = mo_jj / (mo_ca * mo_cb) S3cQC`^  
   'ff_cos = cos_acb YO+d+5  
   If cos_acb >= 1 Then u\?u}t v  
   nn = 0 gk%ye&:f  
   ElseIf cos_acb <= -1 Then TA7w:<  
   nn = 3.14159265258979 ABGL9;.8  
   Else O0RQ}~$'m  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) xw Qkk  
   End If v8N1fuP}  
   'ff_angle = nn v}@6"\  
   ff_angle = nn * 180 / 3.14159265258979 &LYZQ?|  
End Function

'判断点在区域内函数 E)bP}:4V  
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 X3
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Dim aob, boc, cod, doa, sum As Single 3{z }[@N  
  If ppx = p1x And ppy = p1y Then akoILX~u  
     point_in = True nor`w,2VF  
     Exit Function H]\H'r"  
  End If j!pxG5%  
  If ppx = p2x And ppy = p2y Then (?(ahtT4T  
     point_in = True a*`J]{3G  
     Exit Function EIAT*l:NW  
  End If \)hmg  
   If ppx = p3x And ppy = p3y Then ruVm8BO  
     point_in = True O.!?O(  
     Exit Function 7 m%|TwJN  
  End If U*t`hn-xs  
     xhv)rhu@  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ;x"B ):?\  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ^z1WPI  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) qSR %#  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) iC">F.9#  
    sum = aob + boc + cod + doa Z1zC@z4sUj  
    If 360.01 > sum And sum > 359.99 Then F7df  
       point_in = True qabM@+m[  
    Else $: -Ptm@  
       point_in = False @<+(40`*  
    End If va)\uXW.N  
End Function

'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() v^pE=f*/  
    '求得中心点坐标 _\"?:~rUN  
Dim tt As String cB TMuDT_  
Dim rt(3) As Single ?mMd6U&J  
    '判断是否平行 Q8O38
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   acx = p3x - p1x ?tOzhrv  
   acy = p3y - p1y }'3V(;9  
   bdx = p4x - p2x FD8aO?wvg  
   bdy = p4y - p2y phTZUmi  
   If acx * bdy = acy * bdx Then I".r`$XZ  
      rt(0) = 0 y
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      Exit Function [KJm&\evp  
   Else q\ ?6-?Mr  
      '判断斜率存在否 jtA Yp3M-$  
      If p1x = p3x And p2x <> p4x Then e3[N#ryt  
         tt = "ac_n_bd_y" jjs-[g'}  
      ElseIf p1x <> p3x And p2x = p4x Then mZORV3bN  
         tt = "ac_y_bd_n" \Ew2@dF{O  
      ElseIf p1x <> p3x And p2x <> p4x Then ,}bC  
         tt = "ac_y_bd_y" 7XZ!UC;i  
      End If UOq$88sr  
    Select Case tt g{&ux k);  
         Case "ac_n_bd_y" ,Ti#g8j  
            'bd线段方程 D[<8(~VP  
            k_bd = bdy / bdx 1=s%.0  
            b_bd = p2y - k_bd * p2x Qv8Z64#  
            p_x = p1x K@hv[4  
            p_y = k_bd * p_x + b_bd 0 {w?u%'  
         Case "ac_y_bd_n" O,7P6  
            'ac线段方程 5}1cNp6@  
            k_ac = acy / acx mI l_ [  
            b_ac = p1y - k_ac * p1x C!:\H<gI  
            p_x = p2x  N3E=t#n  
            p_y = k_ac * p_x + b_ac hhwV)Z  
        Case "ac_y_bd_y" H4)){\  
           'ac，bd线段都要求 #T+%$q [:  
           k_ac = acy / acx zd+8fP/UB  
           b_ac = p1y - k_ac * p1x |n0 )s% 8`  
           k_bd = bdy / bdx xl s_g/Q  
           b_bd = p2y - k_bd * p2x &a O
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           p_x = -(b_bd - b_ac) / (k_bd - k_ac) & %1XYpA.0  
           p_y = k_ac * p_x + b_ac ]zu"x9-`  
        End Select ,Xao{o(  
      rt(1) = p_x z"R-Sme  
      rt(2) = p_y 2 3
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'计算最大半径
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   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) JVU:`
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   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) !J.qH%S5  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) .0nL;o  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Cdc6<8  
Dim bb(5) As Single 0F)Y[{h<  
  bb(1) = rr1 7` &K=( .  
  bb(2) = rr2 fk9FR^u  
  bb(3) = rr3 &c0U\G|j  
  bb(4) = rr4 UT+B*?,h  
  nb = rr1 $TWt
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For i = 1 To 4 F.K7w  
    If nb <= bb(i) Then Lylw('zZ  
       nb = bb(i) kpcIU7|e  
    End If R
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Next i N^B YNqr  
    rt(0) = Sqr(nb) Uk5jZ|  
    rr = rt() UV$v:>K#  
  End If $#1i@dI  
         h0L*8P`t  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  S450
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7vax[,aI  
有热压工艺方面的人才或者资料分享下； q^ lx03   
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 z
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高手真多！

楼主威武霸气.