[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： R`Lm"5w  
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图片:2.jpg

+29\'w,  

关键点说几个： Qs9U&*L  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ;g:bn5G  
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 \+3Wd$I  
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 0Qp'}_  

以下是几个重要的函数： WcwW@cY7\  
1.判断点在区域中函数 5TneuGD  
2.计算夹角函数 +n[wkgFd  
3.转置函数 Sz|CreFK16  
4.得到区域中心点，及区域半径函数 G}#/`]o!K  
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） P! Ed  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 $SzCVWS  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single z|]oM#Gt  
   cax = x2 - x1 y3nm!tjyM  
   cay = y2 - y1 z8(R.TB  
   cbx = x2 - x3 G0QXf  
   cby = y2 - y3 /QXs-T}d  
   mo_jj = cax * cbx + cay * cby '?G[T28  
   mo_ca = Sqr(cax * cax + cay * cay) 3y=<w|4F  
   mo_cb = Sqr(cbx * cbx + cby * cby) Flujwh@rg  
   cos_acb = mo_jj / (mo_ca * mo_cb) [du>ff  
   'ff_cos = cos_acb >3`ctbe  
   If cos_acb >= 1 Then |5IY`;+9  
   nn = 0 gQh Ccv  
   ElseIf cos_acb <= -1 Then 2v9s@k/k)6  
   nn = 3.14159265258979 v^],loi<V  
   Else G#n^@kc*,  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) gLaO#cQ%  
   End If nn)`eR&  
   'ff_angle = nn ^s@*ISY  
   ff_angle = nn * 180 / 3.14159265258979 9U<)_E<y  
End Function

'判断点在区域内函数 L`\`NNQC  
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 CS;W)F  
Dim aob, boc, cod, doa, sum As Single QFNz9c  
  If ppx = p1x And ppy = p1y Then moVa'1ul  
     point_in = True }&(E#*>x  
     Exit Function lNaez3  
  End If 2[LX\  
  If ppx = p2x And ppy = p2y Then ^EUOmVN  
     point_in = True kg?T$}O  
     Exit Function urrO1  
  End If d
7gH3 l  
   If ppx = p3x And ppy = p3y Then /h7>Z9T  
     point_in = True T`g?)
/  
     Exit Function @vdc)vN[/  
  End If vzyNc'  
     miG;]-"^  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) V<HOSB7  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) %;<k(5bhGJ  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ~"JE![XR  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) qP;{3FSkAF  
    sum = aob + boc + cod + doa ^fE\S5P  
    If 360.01 > sum And sum > 359.99 Then &N/|(<CB  
       point_in = True . QQ?w  
    Else =M1a0i|d  
       point_in = False u+mjguIv  
    End If BP[CR1Gs  
End Function

'得到点半径,得到交点坐标函数 KFTf~!|  
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() F@=e2e 4  
    '求得中心点坐标 aPD?Bh>JU  
Dim tt As String $z2xZqe  
Dim rt(3) As Single .N5hV3  
    '判断是否平行 n0+g]|a AF  
   acx = p3x - p1x t4f (Y,v  
   acy = p3y - p1y i7S>
RB  
   bdx = p4x - p2x ig{A[7qN  
   bdy = p4y - p2y ~rgf{oGz  
   If acx * bdy = acy * bdx Then hsTFAfa'  
      rt(0) = 0 Iz6ss(UJ  
      Exit Function C1X}3bB  
   Else !Qv5"_  
      '判断斜率存在否 mJ0}DJiX$  
      If p1x = p3x And p2x <> p4x Then ]> nPqL  
         tt = "ac_n_bd_y" z>cIiprX  
      ElseIf p1x <> p3x And p2x = p4x Then 2YL`3cgfb  
         tt = "ac_y_bd_n" DAjG*K{  
      ElseIf p1x <> p3x And p2x <> p4x Then
qpb/g6g  
         tt = "ac_y_bd_y" vnz[w=U  
      End If Z"6 2#VM  
    Select Case tt m0=cMVCA!  
         Case "ac_n_bd_y" @T<ad7g-2J  
            'bd线段方程 Tg"'pO  
            k_bd = bdy / bdx e1^fUOS  
            b_bd = p2y - k_bd * p2x 9U#\nXM  
            p_x = p1x %/UV_@x&  
            p_y = k_bd * p_x + b_bd |RR"'o_E  
         Case "ac_y_bd_n" a$C2}  
            'ac线段方程 0zg2g!lh  
            k_ac = acy / acx #d7N| 9_  
            b_ac = p1y - k_ac * p1x I*^5'N'  
            p_x = p2x lq:]`l,6@  
            p_y = k_ac * p_x + b_ac C:]/8l  
        Case "ac_y_bd_y" TRF]i/Bs  
           'ac，bd线段都要求 S:/{  
           k_ac = acy / acx E)C.eW /  
           b_ac = p1y - k_ac * p1x ! G*&4V3Mg  
           k_bd = bdy / bdx Oq*n9V  
           b_bd = p2y - k_bd * p2x #$LH2?)  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ctp?y  
           p_y = k_ac * p_x + b_ac )D:9R)m  
        End Select z'7#"D  
      rt(1) = p_x n4^~gT%b5]  
      rt(2) = p_y Ee{`Y0  
     TG1P=g5h  
'计算最大半径 ,%A)"doaG  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y)
'#O;mBPNi  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Dq?E
\  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) GHv{   
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) n%F-cw  
Dim bb(5) As Single ID)^vwn  
  bb(1) = rr1 `-4'/~G  
  bb(2) = rr2 (jMtN?&0H-  
  bb(3) = rr3 DH:J  
  bb(4) = rr4 dw~[9oh  
  nb = rr1 ypH8QfxLTr  
For i = 1 To 4 (VR"Mi4  
    If nb <= bb(i) Then |)9thIQF  
       nb = bb(i) #S%4?  
    End If G@9u:\[l  
Next i $50\"mo~z  
    rt(0) = Sqr(nb) O]t\B*%}  
    rr = rt() L~IE,4  
  End If K]X`sH:  
         fb23J|"  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  [jrqz
B  

6{=_718l`  
有热压工艺方面的人才或者资料分享下； Xwq]f:@V  
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 .'j29 6[u  

高手真多！

楼主威武霸气.