[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： *HT)Au"5  
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关键点说几个： xgdS]Sz  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ;8|D4+  
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 k!&G;6O-  
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 S_Tv Ix/7&  

以下是几个重要的函数： `[OJ)tHE  
1.判断点在区域中函数 Sckt gp8  
2.计算夹角函数 8fG$><@
 
3.转置函数 BLepCF38  
4.得到区域中心点，及区域半径函数 \d"uR@$3mG  
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） F!>92H~3G  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ak
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Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single slQxz;t  
   cax = x2 - x1 35;UE2d)<  
   cay = y2 - y1 _mEW]9Sp  
   cbx = x2 - x3 n?UFFi+a  
   cby = y2 - y3 D2,2Yy5y  
   mo_jj = cax * cbx + cay * cby JU6PBY~C'  
   mo_ca = Sqr(cax * cax + cay * cay) )=k8W9i8b  
   mo_cb = Sqr(cbx * cbx + cby * cby) kVqRl%/3Tb  
   cos_acb = mo_jj / (mo_ca * mo_cb) I^u$H&  
   'ff_cos = cos_acb We8n20wf<  
   If cos_acb >= 1 Then %(P\"hE'  
   nn = 0 71RG1,  
   ElseIf cos_acb <= -1 Then (Yv)%2  
   nn = 3.14159265258979 :2Fy`PPab  
   Else ym]12PAU5  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 2cB){.E  
   End If A89n^@  
   'ff_angle = nn XEUy,>mR  
   ff_angle = nn * 180 / 3.14159265258979 i"B q*b@  
End Function

'判断点在区域内函数 *GGiSt  
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 eZck$]P(6H  
Dim aob, boc, cod, doa, sum As Single e@`"V,i  
  If ppx = p1x And ppy = p1y Then US.7:S-r"  
     point_in = True xn&$qLB  
     Exit Function en5sqKqh+  
  End If #s}cK  
  If ppx = p2x And ppy = p2y Then 2w7PwNb*32  
     point_in = True >l>;"R9N  
     Exit Function 4/Mi-ls_  
  End If NDqvt$  
   If ppx = p3x And ppy = p3y Then }+m")=1{  
     point_in = True gZg5On  
     Exit Function /uNgftj  
  End If #+Pk_
?  
     (b*PDhl`+  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 3= q,k<=L  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 5;alq]m7  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 9_4bw9A  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) jG E=7  
    sum = aob + boc + cod + doa P<OSm*;U:  
    If 360.01 > sum And sum > 359.99 Then ov9+6'zya  
       point_in = True r](%9Y  
    Else P@xb  
       point_in = False e -yL  
    End If $*k9e^{S  
End Function

'得到点半径,得到交点坐标函数 RP9jZRDbZ  
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() c?/R=/H  
    '求得中心点坐标 +{5y,0R  
Dim tt As String h8)m2KrZ!.  
Dim rt(3) As Single vUNmN2pRJ  
    '判断是否平行 ->rr4xaKC  
   acx = p3x - p1x iL6Yk @  
   acy = p3y - p1y ~ZuFMVR  
   bdx = p4x - p2x ox&PFI0Gn  
   bdy = p4y - p2y 6`JY:~V"  
   If acx * bdy = acy * bdx Then F3Y/Miw  
      rt(0) = 0 h
@H8oZ[  
      Exit Function &%\H170S  
   Else <=g{E-  
      '判断斜率存在否  L#>^R   
      If p1x = p3x And p2x <> p4x Then 6A;,Ph2  
         tt = "ac_n_bd_y" {}A1[Y|  
      ElseIf p1x <> p3x And p2x = p4x Then xaw)iC[gI{  
         tt = "ac_y_bd_n" hUo}n>Aa  
      ElseIf p1x <> p3x And p2x <> p4x Then Al0ls  
         tt = "ac_y_bd_y" p "Cxe  
      End If }NgevsV>;  
    Select Case tt 9()d7Y#d/`  
         Case "ac_n_bd_y" Q/2(qD; u  
            'bd线段方程 |vUjoa'.7E  
            k_bd = bdy / bdx Zai:?%^  
            b_bd = p2y - k_bd * p2x 1I#]OY#>  
            p_x = p1x 8rEUZk  
            p_y = k_bd * p_x + b_bd \v]esIP5R'  
         Case "ac_y_bd_n" cmu|d  
            'ac线段方程 ,jc')#]9B  
            k_ac = acy / acx U{[ g"_+~  
            b_ac = p1y - k_ac * p1x qPvWb1H:  
            p_x = p2x =K:)%
Qh  
            p_y = k_ac * p_x + b_ac ,g~Iup  
        Case "ac_y_bd_y" "R5! VV  
           'ac，bd线段都要求 J4l\  
           k_ac = acy / acx IJQ" *;  
           b_ac = p1y - k_ac * p1x 7+2DsZ^6MW  
           k_bd = bdy / bdx ^lP;
JT?  
           b_bd = p2y - k_bd * p2x gbvMS*KQz  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ENhKuX  
           p_y = k_ac * p_x + b_ac u$%;03hJ  
        End Select ~^<1k-  
      rt(1) = p_x \ y}!yr
Q  
      rt(2) = p_y \nbGdka  
     7E]qP 5  
'计算最大半径 Pz77\DpFi  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) l RM7s(^l  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) bSv
r8FY3d  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) e{6I-5`|,#  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) .kf FaK  
Dim bb(5) As Single (M;jnQ0  
  bb(1) = rr1 7mBH#Q)  
  bb(2) = rr2 E},^,65  
  bb(3) = rr3 ;QS(`SK l  
  bb(4) = rr4 N/V~>UJ0{*  
  nb = rr1 UfxYD  
For i = 1 To 4 ah2L8jN"  
    If nb <= bb(i) Then WXmR{za   
       nb = bb(i) z?M_Cz;:J  
    End If /73ANQ"  
Next i (O-.^VV  
    rt(0) = Sqr(nb) R|g50Q  
    rr = rt() m3']/}xHO  
  End If my+2@ln  
         m#Dae\w&  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  &a!MT^anA~  

CLgfNrW~  
有热压工艺方面的人才或者资料分享下； UW'@3#<?  
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 })umg8s  

高手真多！

楼主威武霸气.