[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： f;b(W  
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关键点说几个： _#
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1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 0VbZBLe  
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 =tP|sYR]^  
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 >GjaA1,  

以下是几个重要的函数： 4Q]+tXes  
1.判断点在区域中函数 /,;9hx  
2.计算夹角函数 x3vz4m[  
3.转置函数 s=6w-'; V  
4.得到区域中心点，及区域半径函数 MTF:mL
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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） }&!rIU  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 #ucOjdquq  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single  e%qMrR  
   cax = x2 - x1 7f`jl/   
   cay = y2 - y1 plp).Gq  
   cbx = x2 - x3 C4n5U^  
   cby = y2 - y3 `j<'*v zo  
   mo_jj = cax * cbx + cay * cby L$jRg  
   mo_ca = Sqr(cax * cax + cay * cay) MBa/-fD  
   mo_cb = Sqr(cbx * cbx + cby * cby) mG2}JWA  
   cos_acb = mo_jj / (mo_ca * mo_cb) mp5]=6~:m  
   'ff_cos = cos_acb 2S/^"IM["  
   If cos_acb >= 1 Then [szwPNQ_  
   nn = 0 !E*-\}[  
   ElseIf cos_acb <= -1 Then iBc( @EJ  
   nn = 3.14159265258979 0.Iw/e   
   Else }we"IqLb  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) |D^[]*cEH  
   End If v=/V<3  
   'ff_angle = nn }b+=,Sc"  
   ff_angle = nn * 180 / 3.14159265258979 J"SAA0)@  
End Function

'判断点在区域内函数 s~TYzfA  
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 "PuP J|  
Dim aob, boc, cod, doa, sum As Single O,DA{> *m  
  If ppx = p1x And ppy = p1y Then qg'm<[  
     point_in = True =si<OB  
     Exit Function "3!4 hiU9  
  End If Bg34YmZ  
  If ppx = p2x And ppy = p2y Then ]P 2M  
     point_in = True {wd.aUB  
     Exit Function <;acWT?(  
  End If ?XeRL<n  
   If ppx = p3x And ppy = p3y Then Z&PwNr/  
     point_in = True T%ha2X=  
     Exit Function t<$yxD/R  
  End If 7IFUsli]  
     R(hqBa/V  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) |&C.P?q  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) !ZB|GLpo6  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 8_ju.h[  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) :yO)g]KF  
    sum = aob + boc + cod + doa ";xG[ne$Be  
    If 360.01 > sum And sum > 359.99 Then ) I@gy  
       point_in = True Gd"lB*^Ht  
    Else 9WHkw@<R+  
       point_in = False <iL+/^#  
    End If gmrjCLj  
End Function

'得到点半径,得到交点坐标函数 Inr ~9hz  
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() PN<Y&/fB  
    '求得中心点坐标 >j\zj] -"  
Dim tt As String sHAzg^n}r  
Dim rt(3) As Single #
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    '判断是否平行 Dx iCq(;  
   acx = p3x - p1x G&:YgwG  
   acy = p3y - p1y 9t;aJFI  
   bdx = p4x - p2x Lw-)ijBW  
   bdy = p4y - p2y =TyN"0@  
   If acx * bdy = acy * bdx Then |f`!{=?  
      rt(0) = 0 (swP#t5S  
      Exit Function #{<Jm?sU  
   Else lQ)ZsFs=  
      '判断斜率存在否 "i9$w\lm  
      If p1x = p3x And p2x <> p4x Then jtl7t5
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         tt = "ac_n_bd_y" {iHC;a5gb$  
      ElseIf p1x <> p3x And p2x = p4x Then O4( Z%YBe  
         tt = "ac_y_bd_n" ?^k-)V  
      ElseIf p1x <> p3x And p2x <> p4x Then =@B9I<GKf  
         tt = "ac_y_bd_y" ou@Dd4  
      End If ,]Hn*\@p[c  
    Select Case tt AnIENJ  
         Case "ac_n_bd_y" U9kt7#@FDK  
            'bd线段方程 
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            k_bd = bdy / bdx pH)V:BmJ  
            b_bd = p2y - k_bd * p2x 2<U5d`  
            p_x = p1x #|2w^Kn  
            p_y = k_bd * p_x + b_bd Le#bitp  
         Case "ac_y_bd_n" t3G%}d?  
            'ac线段方程 2}+V3/  
            k_ac = acy / acx Y#C=ku  
            b_ac = p1y - k_ac * p1x +5 @8't  
            p_x = p2x d0IHl!X  
            p_y = k_ac * p_x + b_ac 9KD2C>d<  
        Case "ac_y_bd_y" c_&iGQ  
           'ac，bd线段都要求 8(&C0_yD  
           k_ac = acy / acx C{+~x@  
           b_ac = p1y - k_ac * p1x |PTL!>ym2  
           k_bd = bdy / bdx  03_tt7  
           b_bd = p2y - k_bd * p2x L,Uqt,  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) !d%OoRSU'  
           p_y = k_ac * p_x + b_ac N\ GBjr-d  
        End Select
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      rt(1) = p_x OfY>~d  
      rt(2) = p_y :6Bk<  
     LV'v7 2yUH  
'计算最大半径 %xkq
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   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ~
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   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) -KbT[]  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 5-aCNAF2  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) "'dt"x)  
Dim bb(5) As Single
:^! wQ""  
  bb(1) = rr1 rVFAwbR  
  bb(2) = rr2 t~Ds)  
  bb(3) = rr3 980[]&(  
  bb(4) = rr4 2"JIlS;J}7  
  nb = rr1 b8Y1.y"#  
For i = 1 To 4 3v5]L3  
    If nb <= bb(i) Then prhFA3 rW.  
       nb = bb(i) |L<oKMZY  
    End If 3mpEF<z  
Next i ^]AjcctGr  
    rt(0) = Sqr(nb) i%v^Zg&FU  
    rr = rt() *>zr'Tt,W  
  End If GP[;+xMBh  
         dt^yEapjM  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ukzXQe;l1  

x]Q+M2g?  
有热压工艺方面的人才或者资料分享下； /p?h@6h@y  
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 U_Emp[  

高手真多！

楼主威武霸气.