[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： YPq:z"`-y4  
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关键点说几个： dBovcc  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） V:P]Ved  
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 ?Ov~\[) F  
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  n6Uf>5  

以下是几个重要的函数： J9j @V4  
1.判断点在区域中函数 EowzEGq!a5  
2.计算夹角函数 #;@I.  
3.转置函数 h>cjRH?e  
4.得到区域中心点，及区域半径函数 |F<iu2\  
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） /z`tI  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 " Qyi/r41  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single '!?t+L%gO  
   cax = x2 - x1 Ct~j/.  
   cay = y2 - y1 <&#]|HGc  
   cbx = x2 - x3 kz6fU\U  
   cby = y2 - y3 Ej6ho0_  
   mo_jj = cax * cbx + cay * cby P2C>IS  
   mo_ca = Sqr(cax * cax + cay * cay) S+wT}_BQ  
   mo_cb = Sqr(cbx * cbx + cby * cby) _JTK$\  
   cos_acb = mo_jj / (mo_ca * mo_cb) E.ji;5  
   'ff_cos = cos_acb +c C. ZOS  
   If cos_acb >= 1 Then WwtVuc|  
   nn = 0 /cUu]#h  
   ElseIf cos_acb <= -1 Then BYhiP/^  
   nn = 3.14159265258979 4(oU88z  
   Else @V5i  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) H8dS]N~[Y  
   End If Sj|tR[SAoD  
   'ff_angle = nn En\q. 3 5  
   ff_angle = nn * 180 / 3.14159265258979 AL,7rYZG$  
End Function

'判断点在区域内函数 3tJfh=r=1  
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 .oT'(6#  
Dim aob, boc, cod, doa, sum As Single wF%RM$  
  If ppx = p1x And ppy = p1y Then r%iFsV_  
     point_in = True
g)TZ/,NQ{  
     Exit Function K{`R
`SXD  
  End If _`^AgRE  
  If ppx = p2x And ppy = p2y Then Z[]8X@IPe  
     point_in = True i4h`jFS  
     Exit Function "p
|.[d  
  End If |j9aTv[`  
   If ppx = p3x And ppy = p3y Then *V\.6,^v  
     point_in = True "M /Cl|z  
     Exit Function Ok{1{EmP  
  End If EQd<!)HZ  
     V.qH&FJ=l  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) aT}Hc5L,b  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Cc%{e9e*  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) =H;'.!77Hx  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) !QbuOvw  
    sum = aob + boc + cod + doa E"S#d&9  
    If 360.01 > sum And sum > 359.99 Then |3T2}ohrr  
       point_in = True G8%VL^;O*5  
    Else `sso Wn4  
       point_in = False G7v<Q,s  
    End If hxM{}}.E  
End Function

'得到点半径,得到交点坐标函数
P!IA;i  
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() ~]d9 J  
    '求得中心点坐标 4 ?PB Fbd  
Dim tt As String %cUC~, g_(  
Dim rt(3) As Single [M%?[E}>  
    '判断是否平行 ;]m;p,$  
   acx = p3x - p1x (?^F }]  
   acy = p3y - p1y 4K7ved)  
   bdx = p4x - p2x p3mZw lO  
   bdy = p4y - p2y \7*|u  
   If acx * bdy = acy * bdx Then KU oAxA  
      rt(0) = 0 PI`Y%!P  
      Exit Function '/6f2[%Y"  
   Else ~1}fL 1~5  
      '判断斜率存在否 c_+fA  
      If p1x = p3x And p2x <> p4x Then U!c+i#:t  
         tt = "ac_n_bd_y" <8kCmuGlk  
      ElseIf p1x <> p3x And p2x = p4x Then 41Q)w=hoN  
         tt = "ac_y_bd_n" /}6y\3h  
      ElseIf p1x <> p3x And p2x <> p4x Then G!I5Er0pdy  
         tt = "ac_y_bd_y" /j$pV  
      End If =P9rOK=  
    Select Case tt O-W[^r2e  
         Case "ac_n_bd_y" 
ocK4Nxs  
            'bd线段方程 !^98o:"x  
            k_bd = bdy / bdx [hg9 0Q6  
            b_bd = p2y - k_bd * p2x lemV&$WN|  
            p_x = p1x |;)_-
=L0P  
            p_y = k_bd * p_x + b_bd 3gVU#T[[  
         Case "ac_y_bd_n" j?
]+~  
            'ac线段方程 SC4jKm2  
            k_ac = acy / acx _xi&%F/  
            b_ac = p1y - k_ac * p1x P, l (4  
            p_x = p2x |ZifrkD=  
            p_y = k_ac * p_x + b_ac =FIZh}JD  
        Case "ac_y_bd_y" +$(y2F7|u-  
           'ac，bd线段都要求 M!!vr8}  
           k_ac = acy / acx dnwzf=+>e  
           b_ac = p1y - k_ac * p1x W?E,"z  
           k_bd = bdy / bdx +MaEet
 
           b_bd = p2y - k_bd * p2x H*3u]Ebh  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) er1XZ  
           p_y = k_ac * p_x + b_ac Y:m8UnT  
        End Select >d]-X]  
      rt(1) = p_x K8BlEF`  
      rt(2) = p_y 8?kB+}@6X  
     rDoMz3[w  
'计算最大半径 iiJT%Zq`#  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) <zvtQ^{]  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) e@Ev']  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) PZZPx<?N  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ELMz~vp  
Dim bb(5) As Single C\BKdx5;  
  bb(1) = rr1 ,98 F  
  bb(2) = rr2 md18q:AG)  
  bb(3) = rr3 &Fuk+Cu{  
  bb(4) = rr4 AT3H
HQD  
  nb = rr1 ^z,B}Nz  
For i = 1 To 4 '@#(jY0_  
    If nb <= bb(i) Then Y`-q[F?\y  
       nb = bb(i) <'sm($.2  
    End If >Jn`RsuV  
Next i 1'TS!/ll];  
    rt(0) = Sqr(nb) s%Ph  
    rr = rt() Yqo@ g2g  
  End If !qlk-0&`  
         s/11TgJ  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  [[';Hi^  

Pl`Nniy  
有热压工艺方面的人才或者资料分享下； 1B~Z1w  
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 q68m*1?y  

高手真多！

楼主威武霸气.