[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： rC-E+%y  
,j*9)  
Uqel UL}  

关键点说几个： hQ@k|3=Re  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） *K|~]r(F?  
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 H4y9\ -  
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 GmB&TDm  

以下是几个重要的函数： mWv$eR  
1.判断点在区域中函数 T<B}Z11R  
2.计算夹角函数 %aNm j)L  
3.转置函数 eNd&
47lJ  
4.得到区域中心点，及区域半径函数 *tUOTA 3L  
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'=u`*(b7  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 WutPy_L<  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Nm"P8/-09  
   cax = x2 - x1 ^VXhv9\>B  
   cay = y2 - y1 @-sWXz*W  
   cbx = x2 - x3 c& ;@i$X(  
   cby = y2 - y3 zr|DC] 3  
   mo_jj = cax * cbx + cay * cby Xfk DMh  
   mo_ca = Sqr(cax * cax + cay * cay) ;eYG\uKC{  
   mo_cb = Sqr(cbx * cbx + cby * cby) 4k225~GQ:C  
   cos_acb = mo_jj / (mo_ca * mo_cb) ^sf,mM~D  
   'ff_cos = cos_acb u+j\PWOtm  
   If cos_acb >= 1 Then Rge>20uTl$  
   nn = 0 iA
z0 A  
   ElseIf cos_acb <= -1 Then ["D!IqI:  
   nn = 3.14159265258979 PuJ3#H T  
   Else -$:;en?  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) tczJ
k1g}  
   End If <[[yV  
   'ff_angle = nn 3Z?ornS  
   ff_angle = nn * 180 / 3.14159265258979 %D4)Bqr  
End Function

'判断点在区域内函数 F1.Xk1y%  
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 U 3< 3T  
Dim aob, boc, cod, doa, sum As Single 9qftMDLZJ\  
  If ppx = p1x And ppy = p1y Then M=raKb?F  
     point_in = True -zFJ)!/?  
     Exit Function S($/Ov  
  End If f]i"tqoI  
  If ppx = p2x And ppy = p2y Then -yf8  
     point_in = True v":q_w<k  
     Exit Function M#gxiN  
  End If DO
(};R%=  
   If ppx = p3x And ppy = p3y Then Oo :Dt~Ib  
     point_in = True KVOV<uDCj  
     Exit Function 0I.KHIBk  
  End If Ca0s
m  
     &\9%;k  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ?+Gt?-! 5q  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) xS1|t};  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) )Jjp^U3Ub  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) J!l/.:`6  
    sum = aob + boc + cod + doa qHub+"2  
    If 360.01 > sum And sum > 359.99 Then vi}16V84l  
       point_in = True GY%5N= u  
    Else :XhF:c[.:  
       point_in = False sbmtx/%U  
    End If H1c8]}  
End Function

'得到点半径,得到交点坐标函数 Zye04&x9k  
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() a=}1`Q  
    '求得中心点坐标 \ UrD%;sq  
Dim tt As String X|a{Z*y;r*  
Dim rt(3) As Single nriSVG
i  
    '判断是否平行 th73eC'  
   acx = p3x - p1x ~2k.x*$  
   acy = p3y - p1y i?!9%U!z4  
   bdx = p4x - p2x r<ww%2HTS
 
   bdy = p4y - p2y > '=QBW  
   If acx * bdy = acy * bdx Then cjL)M=pIS  
      rt(0) = 0 HX2u{
2$  
      Exit Function {Phq39g  
   Else LG:k}z/T  
      '判断斜率存在否 B<I(t"s  
      If p1x = p3x And p2x <> p4x Then d
'96$e o~  
         tt = "ac_n_bd_y" [QxP9EC  
      ElseIf p1x <> p3x And p2x = p4x Then
w8X5kk   
         tt = "ac_y_bd_n" 'etA1]<N  
      ElseIf p1x <> p3x And p2x <> p4x Then lW?}Ts~'  
         tt = "ac_y_bd_y" ')v,<{  
      End If )IcSdS0@M  
    Select Case tt QwX81*nx  
         Case "ac_n_bd_y" Ypzmc$Xfu  
            'bd线段方程 oH w!~c7  
            k_bd = bdy / bdx >h8m)Q  
            b_bd = p2y - k_bd * p2x hM]Z T5;<  
            p_x = p1x 4 *}H3-`  
            p_y = k_bd * p_x + b_bd ?L0;, \-t  
         Case "ac_y_bd_n" Bg),Q8\I  
            'ac线段方程 3g4=as4w  
            k_ac = acy / acx /}6I3n  
            b_ac = p1y - k_ac * p1x ;\w3IAa|V  
            p_x = p2x CaZc{  
            p_y = k_ac * p_x + b_ac
KfjWZ4{v  
        Case "ac_y_bd_y" Z5v_- +K  
           'ac，bd线段都要求 2vpQ"e- A  
           k_ac = acy / acx F% n}vA`  
           b_ac = p1y - k_ac * p1x eOb--@~8  
           k_bd = bdy / bdx 4vbGXb}!  
           b_bd = p2y - k_bd * p2x !U% |pa  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) B(M-;F  
           p_y = k_ac * p_x + b_ac b|-)p+ba  
        End Select `T*Y1@FV  
      rt(1) = p_x ?'~u)O(n  
      rt(2) = p_y @ovaOX  
     0s-K oz  
'计算最大半径 t|'%0 W  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) >0@w"aKn  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) FQ0&{ulb  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) F?'  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) {x
g=Ym)  
Dim bb(5) As Single X`_tm3HC  
  bb(1) = rr1 /4(HVua  
  bb(2) = rr2 U Y*`R  
  bb(3) = rr3 1av#u:jy~>  
  bb(4) = rr4 f5F-h0HF`[  
  nb = rr1 JL G!;sov  
For i = 1 To 4 Tl yyJ{~  
    If nb <= bb(i) Then 8TpYt)]S  
       nb = bb(i) xY]q[a?cy  
    End If >bWpj8Kv  
Next i ;@S'8  
    rt(0) = Sqr(nb) |kh{EUE ;  
    rr = rt() $B?8\>_?  
  End If %ud-3u52M8  
         HlX~a:.7  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  HaL'/V~  

BZhf/{h[@  
有热压工艺方面的人才或者资料分享下； zmZU"eWp)  
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 _;^x^  

高手真多！

楼主威武霸气.