[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： "!6 B5Oz  
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关键点说几个： $9i5<16  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） WJSHLy<a  
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 Z8dN0AqZ  
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 POg0=32  

以下是几个重要的函数： G~tOCp="p  
1.判断点在区域中函数 1&pP}v ?  
2.计算夹角函数 /b
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3.转置函数 .z>." `  
4.得到区域中心点，及区域半径函数 {uM{5GSL  
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） $)7f%II  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 [=1?CD  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single vEp8
Hc  
   cax = x2 - x1 ?N*@o.  
   cay = y2 - y1 (a
!,)  
   cbx = x2 - x3 5nq-b@?L  
   cby = y2 - y3 wSyu^KDz  
   mo_jj = cax * cbx + cay * cby gj;G:;1m  
   mo_ca = Sqr(cax * cax + cay * cay) /=(FM   
   mo_cb = Sqr(cbx * cbx + cby * cby) FOG+[v  
   cos_acb = mo_jj / (mo_ca * mo_cb) q.F1
Jj  
   'ff_cos = cos_acb r3vj o(  
   If cos_acb >= 1 Then $rYu4^  
   nn = 0 J5IJy3d  
   ElseIf cos_acb <= -1 Then -XG$ 0  
   nn = 3.14159265258979 z))[Lg  
   Else OBSJbDqT  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) A3pQ?d[  
   End If 1H 6Wrik  
   'ff_angle = nn s9bP6N!,  
   ff_angle = nn * 180 / 3.14159265258979 \^LR5S&  
End Function

'判断点在区域内函数 )d`$2D&iY  
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean iH0c1}<k$  
Dim aob, boc, cod, doa, sum As Single c?",
kzo  
  If ppx = p1x And ppy = p1y Then I GtH<0Du  
     point_in = True !{lb#  
     Exit Function V%=t2+  
  End If H4Ek,m|c  
  If ppx = p2x And ppy = p2y Then _Z2)e*(  
     point_in = True {HnOUc\4  
     Exit Function ev >9P  
  End If O9)8a]  
   If ppx = p3x And ppy = p3y Then _Y
{g5t  
     point_in = True @7'gr>_E  
     Exit Function L 3@wdC~0  
  End If ?,C,q5 T\  
     4*X$Jle|  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) =x>k:l~s  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) JN)t'm[kyE  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 8 K!a:{  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) DYK|"@  
    sum = aob + boc + cod + doa oZtz"B  
    If 360.01 > sum And sum > 359.99 Then .*"IJD9  
       point_in = True 6I0MJpLW  
    Else ;@hP*7Lm  
       point_in = False xd<68%Cn  
    End If -bF+uCfba  
End Function

'得到点半径,得到交点坐标函数 \Wk$>?+#@  
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() -j,o:ng0  
    '求得中心点坐标 </QSMs  
Dim tt As String we9AB_y  
Dim rt(3) As Single zqkmsFH{  
    '判断是否平行 SEmD's  
   acx = p3x - p1x q8J/tw?%v  
   acy = p3y - p1y \+\h<D-5  
   bdx = p4x - p2x mVLGQlvVK  
   bdy = p4y - p2y 3^Y-P8.zdB  
   If acx * bdy = acy * bdx Then QZfnoKz  
      rt(0) = 0 jI%yi-<;  
      Exit Function rgCId@R  
   Else :`K;0`C+  
      '判断斜率存在否 n|.;g!QDA  
      If p1x = p3x And p2x <> p4x Then 4/4IZfznX  
         tt = "ac_n_bd_y" 'zaB5d~l  
      ElseIf p1x <> p3x And p2x = p4x Then 809-p_)B  
         tt = "ac_y_bd_n" ~U|te_l  
      ElseIf p1x <> p3x And p2x <> p4x Then o>YRKb  
         tt = "ac_y_bd_y" bQ%^l#H_n'  
      End If ]x|sTKv2  
    Select Case tt R+\5hI@ >i  
         Case "ac_n_bd_y" 19S,>  
            'bd线段方程 e/6oC~#]  
            k_bd = bdy / bdx Ud](hp"  
            b_bd = p2y - k_bd * p2x a'Z"Yz^Eo  
            p_x = p1x .jCdJ =z  
            p_y = k_bd * p_x + b_bd ,RZktWW_  
         Case "ac_y_bd_n" ]mp.KvB  
            'ac线段方程 nT>?}/S  
            k_ac = acy / acx Lv_>cFJ}[  
            b_ac = p1y - k_ac * p1x w3*JVIQC  
            p_x = p2x <1y%ch;  
            p_y = k_ac * p_x + b_ac d+(~{xK:  
        Case "ac_y_bd_y" (w.B_9#  
           'ac，bd线段都要求 B 5?(gb"  
           k_ac = acy / acx r~sGot+sQA  
           b_ac = p1y - k_ac * p1x O@[q./VV,  
           k_bd = bdy / bdx 8wBns)wy@  
           b_bd = p2y - k_bd * p2x v1} $FmHL"  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) N5_v}<CN  
           p_y = k_ac * p_x + b_ac 43eGfp'  
        End Select /4|qfF3  
      rt(1) = p_x Gqs8$[o  
      rt(2) = p_y .Ee8s]h5W  
     Rk'Dd4"m,  
'计算最大半径 (i`DUF'#y  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) mBNa;6w?{*  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Ei#"r\q j_  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) *mYec~  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 'K0Y@y  
Dim bb(5) As Single dLAElTg  
  bb(1) = rr1 M4QMD;Ez  
  bb(2) = rr2 &t4j px  
  bb(3) = rr3 vs.q<i-u  
  bb(4) = rr4 #hai3>9|B  
  nb = rr1 M?
_VYK  
For i = 1 To 4
"8-]6p3u  
    If nb <= bb(i) Then 0c]Lm?&  
       nb = bb(i)  ~d }-  
    End If 6rRPqO j  
Next i [p]Ayo$~  
    rt(0) = Sqr(nb) % $ 5hC9  
    rr = rt() KB-7]H  
  End If d=x
weU<  
         s|qB;  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  rhsSV3iM  

O#uTwnW  
有热压工艺方面的人才或者资料分享下； -!k"*P  
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 ZV$qv=X  

高手真多！

楼主威武霸气.