[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： %A0/1{(  
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关键点说几个： EKN~H$.  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） b7ZSPXV  
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 ?gXp*>Kg[  
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 g0E'g  

以下是几个重要的函数： Rk8P ax/JK  
1.判断点在区域中函数 @'|~v<<WZ  
2.计算夹角函数 f?)-}\[IR{  
3.转置函数 :Iz8aQ  
4.得到区域中心点，及区域半径函数 c1gQ cqF  
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)<6  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 aQI(Y^&%3  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single |+"(L#wk  
   cax = x2 - x1 a09<!0Rp  
   cay = y2 - y1 <\S:'g"(  
   cbx = x2 - x3 R/a*LSe@&  
   cby = y2 - y3 FE;x8(;W8  
   mo_jj = cax * cbx + cay * cby hFBe,'3M  
   mo_ca = Sqr(cax * cax + cay * cay) xe$_aBU  
   mo_cb = Sqr(cbx * cbx + cby * cby) YA5g';$H*  
   cos_acb = mo_jj / (mo_ca * mo_cb) Yz93'HDB  
   'ff_cos = cos_acb |vzl. ^"-  
   If cos_acb >= 1 Then PmM3]xVzd  
   nn = 0 pmYHUj #  
   ElseIf cos_acb <= -1 Then
r,2g^K)6  
   nn = 3.14159265258979 <=C?e<Y  
   Else f|oh.z_R  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ~7Ux@Sx;  
   End If .5{ab\_af  
   'ff_angle = nn p{dj~
&v  
   ff_angle = nn * 180 / 3.14159265258979 Qe(
:|q_  
End Function

'判断点在区域内函数 Q=yg8CQ  
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 C+&l< fM&  
Dim aob, boc, cod, doa, sum As Single B4 }bVjs  
  If ppx = p1x And ppy = p1y Then "@

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     point_in = True 18:%~>.!  
     Exit Function lU8Hd|@-  
  End If +m,yA mEEd  
  If ppx = p2x And ppy = p2y Then )@bQu~Y  
     point_in = True ,UE83j8D^  
     Exit Function @pU)_d!pJ  
  End If \Y}8S/]  
   If ppx = p3x And ppy = p3y Then ^5 Tqy(M  
     point_in = True d m%8K6|  
     Exit Function <1M-Ro?5k  
  End If y4fdq7i~}9  
     ufT`"i  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) X!g#T9kG  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Jxm.cC5z.  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) @U
}1EC{A  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) -z(+//K:#  
    sum = aob + boc + cod + doa -A!%*9Z  
    If 360.01 > sum And sum > 359.99 Then u\JNr}bL  
       point_in = True c~ V*:$F  
    Else r]36zX v  
       point_in = False z2>lI9D4V  
    End If Thit  
End Function

'得到点半径,得到交点坐标函数 4HA<P6L  
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() HyWCMK6b  
    '求得中心点坐标 *;*r8[U}q  
Dim tt As String y'*K|aTG  
Dim rt(3) As Single !C:$?oU  
    '判断是否平行 83q6Sv  
   acx = p3x - p1x }vM(
"v|M  
   acy = p3y - p1y v_-dx  
   bdx = p4x - p2x
IO-Ow!  
   bdy = p4y - p2y }`~+]9<  
   If acx * bdy = acy * bdx Then &.?'i1!  
      rt(0) = 0 ea')$gR  
      Exit Function `W*U4?M  
   Else 9q[oa5INd  
      '判断斜率存在否 z' >_Mc6  
      If p1x = p3x And p2x <> p4x Then kPLxEwl  
         tt = "ac_n_bd_y" /I0%Z+`=  
      ElseIf p1x <> p3x And p2x = p4x Then y h9*z3  
         tt = "ac_y_bd_n" @I!0-OjL  
      ElseIf p1x <> p3x And p2x <> p4x Then FJP-y5  
         tt = "ac_y_bd_y" Jze:[MYS  
      End If e**qF=HCw  
    Select Case tt [u*5z.^  
         Case "ac_n_bd_y" s!
7y  
            'bd线段方程 Npy:!  
            k_bd = bdy / bdx G<v&4/\p`M  
            b_bd = p2y - k_bd * p2x WI-1)1t  
            p_x = p1x *bA.zmzM  
            p_y = k_bd * p_x + b_bd O@C@eW#  
         Case "ac_y_bd_n" ;;N9>M?b  
            'ac线段方程 NHZz _a=  
            k_ac = acy / acx ^$hH1H+V  
            b_ac = p1y - k_ac * p1x |8tilOqI  
            p_x = p2x H~1jY4E  
            p_y = k_ac * p_x + b_ac QB'aON\S  
        Case "ac_y_bd_y" A2jUmK.&  
           'ac，bd线段都要求 *CI#+P  
           k_ac = acy / acx G*P#]eO  
           b_ac = p1y - k_ac * p1x 81 sG  
           k_bd = bdy / bdx [E juUElr  
           b_bd = p2y - k_bd * p2x ,1o FPa{?  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) W v+?
TEP  
           p_y = k_ac * p_x + b_ac v #j$;  
        End Select JrRH\+4K  
      rt(1) = p_x :!!at:>  
      rt(2) = p_y ?+}_1x`  
     YglmX"fLf  
'计算最大半径 :E )>\&  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) E#N|wq  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) l]l'4@1   
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) QE`
bSI  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) {[?(9u7R  
Dim bb(5) As Single n]o<S+z  
  bb(1) = rr1 X?qK0fS  
  bb(2) = rr2 i6Emhji  
  bb(3) = rr3 ) ahA[  
  bb(4) = rr4 PBTnIU  
  nb = rr1 JYbL?N  
For i = 1 To 4 ou{2@"  
    If nb <= bb(i) Then l?n\i]
'  
       nb = bb(i) K^<BW
(s  
    End If ]K,Tnyp  
Next i #fn)k1  
    rt(0) = Sqr(nb) ?QdWrE_  
    rr = rt() p]2128kqx  
  End If R|87%&6']
 
         *d4eK+U$5  
End Function

高手啊.人才啊.

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

(!7sE9rP  
有热压工艺方面的人才或者资料分享下； rIu$pZO  
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 GxI!{oi2  

高手真多！

楼主威武霸气.