[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： i:N^:%  
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关键点说几个： YKxA2`3v%  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ~ z&A  
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 ua>~$`@gX  
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 N~<}\0  

以下是几个重要的函数： F,2#;t4  
1.判断点在区域中函数 |}y}o:(  
2.计算夹角函数 r!gCh`PiK  
3.转置函数 3EX&.OL!  
4.得到区域中心点，及区域半径函数 %1+~(1P  
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） fU7:3"|s8  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 MQMy Z:  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 
Lk+1r8  
   cax = x2 - x1 ##ea-"m8  
   cay = y2 - y1 /4BXF4ksi,  
   cbx = x2 - x3 ghR]$SG  
   cby = y2 - y3 m:<3d]L  
   mo_jj = cax * cbx + cay * cby b<cM[GaV~  
   mo_ca = Sqr(cax * cax + cay * cay) )L("t  
   mo_cb = Sqr(cbx * cbx + cby * cby) Z"KuS  
   cos_acb = mo_jj / (mo_ca * mo_cb) *fX)=?h56  
   'ff_cos = cos_acb 1h0ohW  
   If cos_acb >= 1 Then pg`;)@  
   nn = 0 +-137!x\q  
   ElseIf cos_acb <= -1 Then (pNng"/  
   nn = 3.14159265258979 CrQ&-!Eh  
   Else +~]g&Mf6o  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ")buDU6_  
   End If u`nn{C4D"  
   'ff_angle = nn 5E(P,!-.  
   ff_angle = nn * 180 / 3.14159265258979 Gnq~1p5^  
End Function

'判断点在区域内函数 |mA*[?ye@  
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 ] 6B!eB !  
Dim aob, boc, cod, doa, sum As Single q0<`XDD`  
  If ppx = p1x And ppy = p1y Then Tr!X2#)A!  
     point_in = True 9?6$2I  
     Exit Function OaWq8MIZ-  
  End If s``L?9  
  If ppx = p2x And ppy = p2y Then 8r,%!70  
     point_in = True ["/x~\c'N  
     Exit Function ri`|qy6! |  
  End If e:R[  
   If ppx = p3x And ppy = p3y Then 06;{2&ju<  
     point_in = True !IU*Ayg  
     Exit Function 4(IP  
  End If r&RSQHa)  
     yp/*@8%_E  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) [i_x 1  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) tBQ> p.  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) D._r@~o  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) #YdU,y=B  
    sum = aob + boc + cod + doa H0 t1& :  
    If 360.01 > sum And sum > 359.99 Then =G6@:h=  
       point_in = True 6 [E"  
    Else 3\ed4D  
       point_in = False Vo[4\h#$  
    End If "Q4{6FH+mB  
End Function

'得到点半径,得到交点坐标函数 pz+#1=b]  
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() hrK^oa_[W  
    '求得中心点坐标 uDR(^T{g#  
Dim tt As String ;C'*U
i  
Dim rt(3) As Single AsOI`@FV  
    '判断是否平行 (X/JXu{  
   acx = p3x - p1x t|%ul6{gz  
   acy = p3y - p1y |EunDb[Y  
   bdx = p4x - p2x R}FN6cH  
   bdy = p4y - p2y 3V]a "C   
   If acx * bdy = acy * bdx Then =8-e1R/  
      rt(0) = 0 tEl_A"^e  
      Exit Function Zh*I0m
   
   Else XOMWqQr|  
      '判断斜率存在否 vHmn)d1pl  
      If p1x = p3x And p2x <> p4x Then LJ?7W,?  
         tt = "ac_n_bd_y" hE${eJQ| U  
      ElseIf p1x <> p3x And p2x = p4x Then \Uiw: ,  
         tt = "ac_y_bd_n" Rd/!CJ@g  
      ElseIf p1x <> p3x And p2x <> p4x Then :
s\s3#?  
         tt = "ac_y_bd_y" %"D-1&%zY  
      End If FsjblB3?E  
    Select Case tt I5{SC-7  
         Case "ac_n_bd_y" #\qES7We6  
            'bd线段方程 ,b{4GU$3  
            k_bd = bdy / bdx HXX"B,N  
            b_bd = p2y - k_bd * p2x c)?y3LX  
            p_x = p1x V.qB3V$  
            p_y = k_bd * p_x + b_bd $|KbjpQ  
         Case "ac_y_bd_n" Jc*A\-qC.  
            'ac线段方程 8I%1 `V  
            k_ac = acy / acx 4?`7XJ0a  
            b_ac = p1y - k_ac * p1x q-'zZ#  
            p_x = p2x tP3Upw"U  
            p_y = k_ac * p_x + b_ac raCxHY  
        Case "ac_y_bd_y" @L0.Z1 ).  
           'ac，bd线段都要求 *:iFhKFU  
           k_ac = acy / acx _ ._'\  
           b_ac = p1y - k_ac * p1x $|AxQQ%f  
           k_bd = bdy / bdx h1xYQF_`Z  
           b_bd = p2y - k_bd * p2x TeHR,GB  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) bTJ7RqL  
           p_y = k_ac * p_x + b_ac NeYj[Q~xy  
        End Select OvkYzI`  
      rt(1) = p_x c(fwl`y!x  
      rt(2) = p_y B--`=@IRf"  
     ebf0;1!  
'计算最大半径 FKPI{l  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Xh5 z8  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) }0:=)e  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) j:g/[_0s  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) u?!p[y6  
Dim bb(5) As Single Gmc
0yRN  
  bb(1) = rr1 z' @F@k6  
  bb(2) = rr2 =73wngw  
  bb(3) = rr3 7C=t19&R'  
  bb(4) = rr4 HghNI  
  nb = rr1 Hc71 .rqS  
For i = 1 To 4 JHcC}+H[  
    If nb <= bb(i) Then %%*t{0!H+  
       nb = bb(i) h<[o;E  
    End If H'+P7*k#M  
Next i J^U#dYd  
    rt(0) = Sqr(nb) \\
_Qv  
    rr = rt() *+5AN306  
  End If YDP<  
         S>nM&758  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  %i:Sf  

h.(CAm%Y7  
有热压工艺方面的人才或者资料分享下； { <f]6  
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 Ep)rEq6  

高手真多！

楼主威武霸气.