[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： \I-e{'h  
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图片:2.jpg

2g~ @99`  

关键点说几个： /CMgWGI  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） dvqg H  
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 Yh!=mW!OY  
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 MmfBFt*  

以下是几个重要的函数： U,Uy0s2r  
1.判断点在区域中函数 D)?%kNeA  
2.计算夹角函数 !=
PH5jTY  
3.转置函数 rks"y&&Nc  
4.得到区域中心点，及区域半径函数 5>+@.hPX  
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） [DDe}D3C  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 R!QR@*N  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single O8b#'f~  
   cax = x2 - x1 ?d%{-  
   cay = y2 - y1 F-rhxJd  
   cbx = x2 - x3 
%&&)[  
   cby = y2 - y3 hnB`+!  
   mo_jj = cax * cbx + cay * cby !-^oU"  
   mo_ca = Sqr(cax * cax + cay * cay) kP+,x H)1  
   mo_cb = Sqr(cbx * cbx + cby * cby) ^67}&O^1 ,  
   cos_acb = mo_jj / (mo_ca * mo_cb) 9 @ <  
   'ff_cos = cos_acb B>>_t2IU  
   If cos_acb >= 1 Then NJgu`@YoI  
   nn = 0  %G\nl  
   ElseIf cos_acb <= -1 Then R:&y@/JY8[  
   nn = 3.14159265258979 fh3uo\`@  
   Else JygJ4RI%j  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) \wsVO"/  
   End If 5I1YB+$}e  
   'ff_angle = nn } % Ie  
   ff_angle = nn * 180 / 3.14159265258979 ]r3/hDRDL@  
End Function

'判断点在区域内函数 mY/"rm  
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 2^ ]^Yc  
Dim aob, boc, cod, doa, sum As Single Z\`SDC  
  If ppx = p1x And ppy = p1y Then SO
*oBA'  
     point_in = True \P+^BG!  
     Exit Function J/K~8sc  
  End If qQ^CSn98J  
  If ppx = p2x And ppy = p2y Then !;(Wm6~*ad  
     point_in = True {g1"{
 
     Exit Function G!sfp}qW  
  End If /huh}&NNu  
   If ppx = p3x And ppy = p3y Then M^Z=~512g  
     point_in = True -.? @f tY  
     Exit Function IMbF]6%p(  
  End If '}(>s%~  
     rZpsC}C'  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) A|1xK90^XT  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) zEO~mJzo  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) f!yl&ulKU  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) EGqu-WBS  
    sum = aob + boc + cod + doa R,78}7B  
    If 360.01 > sum And sum > 359.99 Then kP[fhOpn  
       point_in = True %i3[x.M  
    Else //|B?4kk  
       point_in = False V6[jhdb  
    End If
$`7Fk%#+e  
End Function

'得到点半径,得到交点坐标函数 ^_\m@
 
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() ,.(:b82$  
    '求得中心点坐标 "@^<~bw  
Dim tt As String k"gm;,`  
Dim rt(3) As Single BNE:,I*&  
    '判断是否平行 eDP&W$s#  
   acx = p3x - p1x +U J~/XV  
   acy = p3y - p1y uwI"V|g%a&  
   bdx = p4x - p2x tzd!r7  
   bdy = p4y - p2y C.#Ha-@uz  
   If acx * bdy = acy * bdx Then H'udxPF  
      rt(0) = 0 $eT[`r  
      Exit Function 6l2O>V  
   Else l3^'bp6HQ  
      '判断斜率存在否 8$]SvfX  
      If p1x = p3x And p2x <> p4x Then k=kkF"  
         tt = "ac_n_bd_y" 9]
ZfSn)  
      ElseIf p1x <> p3x And p2x = p4x Then :}fA98S  
         tt = "ac_y_bd_n" }z/%b<o_  
      ElseIf p1x <> p3x And p2x <> p4x Then zQ,M795@EA  
         tt = "ac_y_bd_y" Wf8@B#^{  
      End If g}Lm;gs!>  
    Select Case tt N-2_kjb!  
         Case "ac_n_bd_y" =&k[qqxg  
            'bd线段方程 /mp!%j~  
            k_bd = bdy / bdx &$2d=q8mh  
            b_bd = p2y - k_bd * p2x >#&25,Q  
            p_x = p1x seAPVzWUU  
            p_y = k_bd * p_x + b_bd j~.tyxOq#  
         Case "ac_y_bd_n" J,:;\Xhl  
            'ac线段方程 bM?29cs  
            k_ac = acy / acx di+|` O  
            b_ac = p1y - k_ac * p1x
P"}"q ![  
            p_x = p2x jHE^d<=O^  
            p_y = k_ac * p_x + b_ac M~
`
^deU1  
        Case "ac_y_bd_y" Yc6.v8a  
           'ac，bd线段都要求 0Ba]Zo Z  
           k_ac = acy / acx V'dw=W17V  
           b_ac = p1y - k_ac * p1x F/LMk8RgR  
           k_bd = bdy / bdx y<nPZ<h  
           b_bd = p2y - k_bd * p2x >iG3!Td)y  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 4,R"(ej  
           p_y = k_ac * p_x + b_ac ^C~R)M:C  
        End Select j@+$lU*r  
      rt(1) = p_x \5j}6Wj  
      rt(2) = p_y 4bw4!z9G  
     W?wt$'  
'计算最大半径 | X#!5u  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) (xTGt",_Jo  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ^[bFGKE  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) #UwX~  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 4:**d[|1  
Dim bb(5) As Single Nr*X1lJ6  
  bb(1) = rr1 O x`K7$)  
  bb(2) = rr2  W{Z7=  
  bb(3) = rr3 =w`uZ;l$Q  
  bb(4) = rr4 7p!ROl^  
  nb = rr1 R:Ih#2R  
For i = 1 To 4 q o^mp  
    If nb <= bb(i) Then za 7+xF  
       nb = bb(i) .:Sk=r4u\  
    End If \ %MsG  
Next i 8*#$3e  
    rt(0) = Sqr(nb) Eld[z{n"  
    rr = rt() ~9#x=nU:+V  
  End If :qB|~"9O  
         ?GhMGpdMq  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  $m*Gu:#xm&  

T7.SjR6X>  
有热压工艺方面的人才或者资料分享下； ?0*[ L  
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 $rr@3H+  

高手真多！

楼主威武霸气.