[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： p9w%kM?  
b7qnOjC  

描述:请输入描述

图片:2.jpg

]g7HEB.Y  

关键点说几个： [ArO$X3\  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） sOjF?bCdO  
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 GW:\l~ d  
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 ]zy~@,\  

以下是几个重要的函数： QR|XV%$  
1.判断点在区域中函数 pqkcf\  
2.计算夹角函数 BQ5_s,VM  
3.转置函数
LAizx^F  
4.得到区域中心点，及区域半径函数 V>1D1  
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） \}U[}5Pk&  
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` NT  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single r'Hy}HWuF  
   cax = x2 - x1 200L  
   cay = y2 - y1 ._8xY$l$  
   cbx = x2 - x3 BUcaj.S  
   cby = y2 - y3 R>/QARX  
   mo_jj = cax * cbx + cay * cby M"k3zK,  
   mo_ca = Sqr(cax * cax + cay * cay) fF8a 1XV  
   mo_cb = Sqr(cbx * cbx + cby * cby) \f8P`oET~  
   cos_acb = mo_jj / (mo_ca * mo_cb) vg
UhN_rK  
   'ff_cos = cos_acb P-/XYZ]`  
   If cos_acb >= 1 Then j CTQsV  
   nn = 0 "3U{h]  
   ElseIf cos_acb <= -1 Then 5KL9$J9k  
   nn = 3.14159265258979 xn%l  
   Else o(
B<!ji~'  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) OqEg{o5 a&  
   End If m_{%tU;N  
   'ff_angle = nn NB|RZ
f9M  
   ff_angle = nn * 180 / 3.14159265258979 &:!ZT=  
End Function

'判断点在区域内函数 Sleu#]-  
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 xA[Wb'  
Dim aob, boc, cod, doa, sum As Single BR&Qw'O%  
  If ppx = p1x And ppy = p1y Then IGh !d?D  
     point_in = True mkj;PYa  
     Exit Function *zw R=  
  End If (<d&B
V-"  
  If ppx = p2x And ppy = p2y Then 4~m.#6MT  
     point_in = True 7/p J6>  
     Exit Function 0Y38T)k  
  End If :{TmR3.  
   If ppx = p3x And ppy = p3y Then 3<e(@W}n-M  
     point_in = True ]Omb :  
     Exit Function Ef,7zKG  
  End If ,w9#%=xE  
     %-1BA*J`|  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) y(bt56 | z  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) /el["l
 
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) a=:{{\1o  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ]<\;d B  
    sum = aob + boc + cod + doa |d
B1R%  
    If 360.01 > sum And sum > 359.99 Then )JY_eG&2Dx  
       point_in = True i&}zcGC  
    Else 1Rb XM n  
       point_in = False ^.Ih,@N6  
    End If ,E/Y@sajn+  
End Function

'得到点半径,得到交点坐标函数 iX>!ju'V  
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() UpszCY
4  
    '求得中心点坐标 /BjGAa(  
Dim tt As String
z[KN^2YS  
Dim rt(3) As Single ulPrb>i  
    '判断是否平行 },Y; (n'  
   acx = p3x - p1x HM$`z"p5jg  
   acy = p3y - p1y z|DA _
dG  
   bdx = p4x - p2x SILvqm  
   bdy = p4y - p2y aG8D%i0  
   If acx * bdy = acy * bdx Then VhH]n yi7D  
      rt(0) = 0 3w<j:\i  
      Exit Function Z$#ZYD  
   Else [oU+b(  
      '判断斜率存在否 OFQi&/  
      If p1x = p3x And p2x <> p4x Then lM|WOmD  
         tt = "ac_n_bd_y" YPff)0Nh  
      ElseIf p1x <> p3x And p2x = p4x Then ?lET4
5'  
         tt = "ac_y_bd_n" "k6IV&0 3x  
      ElseIf p1x <> p3x And p2x <> p4x Then !OZhfMVd  
         tt = "ac_y_bd_y" (/x@W`  
      End If n6!Ihip$  
    Select Case tt LA=>g/+i.X  
         Case "ac_n_bd_y"
{Y*]Qc  
            'bd线段方程 ev
mEX<N  
            k_bd = bdy / bdx J?Ep Nie  
            b_bd = p2y - k_bd * p2x YqY6\mo  
            p_x = p1x q*y9/HnI  
            p_y = k_bd * p_x + b_bd ^/d^$  
         Case "ac_y_bd_n" y~A7pzBZ=  
            'ac线段方程 " ;R3260  
            k_ac = acy / acx )[M<72  
            b_ac = p1y - k_ac * p1x Ni@e/| 2b  
            p_x = p2x !NAX6m  
            p_y = k_ac * p_x + b_ac @6!y(e8"J]  
        Case "ac_y_bd_y" DCt:EhC  
           'ac，bd线段都要求 ,@>rubUz  
           k_ac = acy / acx u<y\iZ[   
           b_ac = p1y - k_ac * p1x 6pn@`UK  
           k_bd = bdy / bdx UQf>5g  
           b_bd = p2y - k_bd * p2x WGG) mh&-  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) >KClH'R2  
           p_y = k_ac * p_x + b_ac <9k}CXv2PK  
        End Select 'Rh>w=wB'  
      rt(1) = p_x hTtp-e`  
      rt(2) = p_y etK,zEd  
     ;gW|qb+#)j  
'计算最大半径 qVRO"/R  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) +#JhhW Zj(  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ah Xq{>  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ot+~|Dl  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) {
5tEsv  
Dim bb(5) As Single g1*H|nh2  
  bb(1) = rr1 "xc*A&Sg  
  bb(2) = rr2 ])wMUJWg2  
  bb(3) = rr3 y0&HXX#\  
  bb(4) = rr4 5 EuJ  
  nb = rr1 3F'dT[;  
For i = 1 To 4 &|{,4V0%A  
    If nb <= bb(i) Then n#4J]Z@  
       nb = bb(i) :*Ggz|  
    End If E)_!Hi0<s  
Next i yoY)6cn@  
    rt(0) = Sqr(nb) Mjvso0zj  
    rr = rt() [;#.DH]  
  End If v
zm4  
         VUv.Tx]Z[  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  G&3<rT3Ib  

qAik$.  
有热压工艺方面的人才或者资料分享下； $rYu4^  
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 J5IJy3d  

高手真多！

楼主威武霸气.