[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： 6ncwa<q5  
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关键点说几个： gPCf+>X{  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Cl&mz1Y;]1  
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 C1NU6iV^z  
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 QtnNc!,n  

以下是几个重要的函数： %@C8EFl%3  
1.判断点在区域中函数 F3(SbM-  
2.计算夹角函数 &fB=&jc*j  
3.转置函数 `C: 7N=9  
4.得到区域中心点，及区域半径函数 YtvDayR>  
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） 7<WUjK|  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 2gO@   
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single `0ym3}(O  
   cax = x2 - x1 Pi"?l[T0  
   cay = y2 - y1 k9*U
Bx  
   cbx = x2 - x3 nmiJ2edx  
   cby = y2 - y3 b|AjB:G  
   mo_jj = cax * cbx + cay * cby z&H.fsL  
   mo_ca = Sqr(cax * cax + cay * cay) !IR cv a  
   mo_cb = Sqr(cbx * cbx + cby * cby) #+D][LH4  
   cos_acb = mo_jj / (mo_ca * mo_cb) *e [*  
   'ff_cos = cos_acb 1f+A_k/@  
   If cos_acb >= 1 Then Z]uc *Ed  
   nn = 0 NB<8M!X/  
   ElseIf cos_acb <= -1 Then v CsE|eMP  
   nn = 3.14159265258979 CP\[9#]:  
   Else 2fkyz  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) i45.2,  
   End If S}rEQGGR{  
   'ff_angle = nn TP#Ncqh  
   ff_angle = nn * 180 / 3.14159265258979 g8E5"jpXx3  
End Function

'判断点在区域内函数 .Bkfe{^  
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 [ p,]/ ^ N  
Dim aob, boc, cod, doa, sum As Single ??e|ec2%  
  If ppx = p1x And ppy = p1y Then 'eBD/w5U  
     point_in = True q1xSylE  
     Exit Function }ACg#;>/+  
  End If -cUbIbW  
  If ppx = p2x And ppy = p2y Then T\.~!Q
  
     point_in = True (t3gNin  
     Exit Function hwUb(pZ  
  End If Y>3z
peQ!&  
   If ppx = p3x And ppy = p3y Then +a,#
BSt  
     point_in = True wM[Z
0*K  
     Exit Function ^! h3#4  
  End If &bJBsd@Os  
     A?04,l]y  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 4P?`<K'  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) f%n ;Z}=  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) eXsp0!v  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) vG6*[c8  
    sum = aob + boc + cod + doa v(0ujfSR0  
    If 360.01 > sum And sum > 359.99 Then ?4wl  
       point_in = True Xk!{UxQKQ  
    Else *6<4ECa7C  
       point_in = False /zh:7N  
    End If ,Vj&  
End Function

'得到点半径,得到交点坐标函数 ~G8l1dD  
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() ?`Mk$Y%my  
    '求得中心点坐标 2s,cyCw&  
Dim tt As String z@ZI$.w  
Dim rt(3) As Single vq9O|E3  
    '判断是否平行 Ki:t!vAO  
   acx = p3x - p1x zN5};e}^v  
   acy = p3y - p1y IAUc.VH  
   bdx = p4x - p2x m4uh<;C~  
   bdy = p4y - p2y si~zg\uY  
   If acx * bdy = acy * bdx Then _d7;Z%  
      rt(0) = 0 :{S@KsPqE  
      Exit Function JXww_e[  
   Else !S7?:MJ?p\  
      '判断斜率存在否 L~h:>I+pG  
      If p1x = p3x And p2x <> p4x Then . WJ  
         tt = "ac_n_bd_y" "+{2!  
      ElseIf p1x <> p3x And p2x = p4x Then )gU:Up24|"  
         tt = "ac_y_bd_n" {
=Ji2k0U'  
      ElseIf p1x <> p3x And p2x <> p4x Then sqF.,A,  
         tt = "ac_y_bd_y" %*<Wf4P"  
      End If OcpvY~"Pr  
    Select Case tt &xUCXj2-z  
         Case "ac_n_bd_y" =B+dhZ+#S$  
            'bd线段方程 ;D-k\kv  
            k_bd = bdy / bdx  HC
/a  
            b_bd = p2y - k_bd * p2x -;8a* F  
            p_x = p1x 8kd):gZKZ  
            p_y = k_bd * p_x + b_bd c*axw%Us  
         Case "ac_y_bd_n" VR_/Vh
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            'ac线段方程 `tT7&*Os  
            k_ac = acy / acx !jEV75  
            b_ac = p1y - k_ac * p1x ">8oF.A^  
            p_x = p2x }h/7M  
            p_y = k_ac * p_x + b_ac txMC^-J2l  
        Case "ac_y_bd_y" =d~pr:.F  
           'ac，bd线段都要求 dKXzFyW  
           k_ac = acy / acx &'DR`e O)  
           b_ac = p1y - k_ac * p1x o&k,aCQC  
           k_bd = bdy / bdx WSU/Z[\`H  
           b_bd = p2y - k_bd * p2x v^t oe  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ??#EG{{  
           p_y = k_ac * p_x + b_ac Yc)Dx3  
        End Select ?qHQ#0 @y]  
      rt(1) = p_x ;sUvY*Bcm  
      rt(2) = p_y d'Dd66  
     ghkV^ [  
'计算最大半径 x6\VIP"9L  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ,0nrSJED  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) m4~~q[t  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) {fEb>  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) .W;cz8te  
Dim bb(5) As Single N`X|z  
  bb(1) = rr1 vz:VegS  
  bb(2) = rr2 _~>WAm<  
  bb(3) = rr3 &01KHJY)/G  
  bb(4) = rr4 8WQc8  
  nb = rr1 +g1+,?cU  
For i = 1 To 4  C!v%6[  
    If nb <= bb(i) Then m>w{vqPwJ  
       nb = bb(i) l]R7A_|  
    End If w!d(NA<|0]  
Next i V!@6Nv  
    rt(0) = Sqr(nb) 0Nk!.gY  
    rr = rt() !iX/Ni:  
  End If g38MF  
         UpQda`rb  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  R3#| *)q  

]4FAbY2'h  
有热压工艺方面的人才或者资料分享下； }h sR}  
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 `0W+(9}  

高手真多！

楼主威武霸气.