[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： I8~ .Vu2  
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关键点说几个： )bqSM&SO  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） <KY \sb9  
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 y950Q%B]  
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 4f~ c#0?  

以下是几个重要的函数： XS#Jy n  
1.判断点在区域中函数 S2+X/YeB  
2.计算夹角函数 I'h|7y\  
3.转置函数 v;6O# ta'  
4.得到区域中心点，及区域半径函数 dMd2a4  
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） ce56$L8[  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 #3~hF)u&/  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single W^e"()d/Z  
   cax = x2 - x1 y@Gl'@-O  
   cay = y2 - y1 r'F)8%  
   cbx = x2 - x3 r+RFDg/  
   cby = y2 - y3 ~7 w"$H8  
   mo_jj = cax * cbx + cay * cby 9B)<7JJX!J  
   mo_ca = Sqr(cax * cax + cay * cay) w|,BTM:e  
   mo_cb = Sqr(cbx * cbx + cby * cby) B0+r  
   cos_acb = mo_jj / (mo_ca * mo_cb) l/i7<q  
   'ff_cos = cos_acb / biB*Z  
   If cos_acb >= 1 Then /LK,:6  
   nn = 0 -prc+G,qyp  
   ElseIf cos_acb <= -1 Then L#|6Lnp^  
   nn = 3.14159265258979 9 $&$Fe  
   Else :aHLr[%Mz  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) R3bHX%T  
   End If X~2L  
   'ff_angle = nn ;h~
v,h  
   ff_angle = nn * 180 / 3.14159265258979 (5/>arDn  
End Function

'判断点在区域内函数 `JAM]qB"  
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 I]iTD  
Dim aob, boc, cod, doa, sum As Single `^mY*Cb e  
  If ppx = p1x And ppy = p1y Then ))xP]Muv  
     point_in = True #a+*u?jnnL  
     Exit Function ""W*) rR   
  End If i_{b*o_an  
  If ppx = p2x And ppy = p2y Then ^Q9!DF m  
     point_in = True cii
! WCu  
     Exit Function efrVF5,y?  
  End If I&JjyR  
   If ppx = p3x And ppy = p3y Then %8
c2d  
     point_in = True 8`B]UcL)  
     Exit Function YIn H8Ex  
  End If 7 (kC|q\4M  
     S{fFpe-  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) RQO&F$R=  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) _%gu<Ys  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) .P#+V$qhv  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) &|YJ?},  
    sum = aob + boc + cod + doa 0nsjihw  
    If 360.01 > sum And sum > 359.99 Then n\w2e_g;N  
       point_in = True ^W%#Elf)  
    Else AD>X'J u8  
       point_in = False ~\khwNA  
    End If U'p-Ko#  
End Function

'得到点半径,得到交点坐标函数 DkJ "#8Yl=  
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() I[w;soI  
    '求得中心点坐标 $!v:@vNMs  
Dim tt As String %CIRN}  
Dim rt(3) As Single >_|$7m.?n[  
    '判断是否平行 @/W~lJ!e  
   acx = p3x - p1x ;!(GwgllD  
   acy = p3y - p1y TGH"OXV*@  
   bdx = p4x - p2x @(W{_mw  
   bdy = p4y - p2y AlA:MO]NM  
   If acx * bdy = acy * bdx Then +)ba9bJ|  
      rt(0) = 0 rsn^YC  
      Exit Function 7CDp$7v2  
   Else QWI)Y:<K/  
      '判断斜率存在否 H&SoVi_V  
      If p1x = p3x And p2x <> p4x Then ^`?M~e2FZ8  
         tt = "ac_n_bd_y" d#1yVdqR
l  
      ElseIf p1x <> p3x And p2x = p4x Then Ox%p"xuP,  
         tt = "ac_y_bd_n" h>"j!|#!s  
      ElseIf p1x <> p3x And p2x <> p4x Then ?np3*;lw  
         tt = "ac_y_bd_y" @@V{W)rl  
      End If ;~-M$a }4  
    Select Case tt CK9FAuU  
         Case "ac_n_bd_y" "[dfb#0z`  
            'bd线段方程 BcxALRWE  
            k_bd = bdy / bdx 3=-V!E  
            b_bd = p2y - k_bd * p2x !2F X l;  
            p_x = p1x ZxB7H{  
            p_y = k_bd * p_x + b_bd {Jc.49  
         Case "ac_y_bd_n" I=2b)"t0  
            'ac线段方程 F1u2SltR
 
            k_ac = acy / acx xi[\2g+  
            b_ac = p1y - k_ac * p1x -dS@l'$  
            p_x = p2x 7S2"e[-x  
            p_y = k_ac * p_x + b_ac 5tl($j  
        Case "ac_y_bd_y" z\`tnz7>$  
           'ac，bd线段都要求 5m2f\^U  
           k_ac = acy / acx LYO2L1u)  
           b_ac = p1y - k_ac * p1x x|$|~6f=n  
           k_bd = bdy / bdx kRqe&N e  
           b_bd = p2y - k_bd * p2x +~$pkxD"  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) C7FxV2  
           p_y = k_ac * p_x + b_ac $.x,[R aN  
        End Select |B {*so]  
      rt(1) = p_x :i>If:>g  
      rt(2) = p_y >%H(0G#X  
     ,c,@WQ2
:-  
'计算最大半径 B \LmE+a>  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) l[<U UEjZJ  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Rga *68s|&  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) \V#
fl  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) &%`WXe-`R  
Dim bb(5) As Single ly#jl5wmT  
  bb(1) = rr1 yoH,4,!G  
  bb(2) = rr2
>hY.F/[  
  bb(3) = rr3 e2yCWolmTS  
  bb(4) = rr4 F:og:[  
  nb = rr1 `|2g&Vn  
For i = 1 To 4 c2gi3  
    If nb <= bb(i) Then  <HnpI  
       nb = bb(i) ]\y]8v5(  
    End If 24u_}ZQzY  
Next i @`qB[<t8:<  
    rt(0) = Sqr(nb) GOOm] ]I  
    rr = rt() E=Vp%08(  
  End If waU2C2!w
 
         ~@DdN5  
End Function

高手啊.人才啊.

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

6i2%EC9  
有热压工艺方面的人才或者资料分享下； s*s~yH6  
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 *yaS^k\  

高手真多！

楼主威武霸气.