[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： m6r )Z5}f  
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关键点说几个： 6%kJDY.  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） BY*2yp}7  
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 &QTeGn  
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 AzW7tp;t=  

以下是几个重要的函数： [v0ri<sm  
1.判断点在区域中函数 %i$M/C"(  
2.计算夹角函数 -R&E,X7N  
3.转置函数 N^\2 _T  
4.得到区域中心点，及区域半径函数 +YkW[a\4  
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） f6B-~x<l  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 9- xlvU,
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Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ><NI'q*cQ  
   cax = x2 - x1 {f+N]Oo*  
   cay = y2 - y1 oX'0o 'c  
   cbx = x2 - x3 qoC]#M$oo#  
   cby = y2 - y3 EBoGJ_l  
   mo_jj = cax * cbx + cay * cby 8]q  
   mo_ca = Sqr(cax * cax + cay * cay) H2qf'  
   mo_cb = Sqr(cbx * cbx + cby * cby) ~+O`9&  
   cos_acb = mo_jj / (mo_ca * mo_cb) jR{-  
   'ff_cos = cos_acb JEWL)  
   If cos_acb >= 1 Then |[S90Gw]  
   nn = 0 Jd5\&ma  
   ElseIf cos_acb <= -1 Then Go>wo/Sb  
   nn = 3.14159265258979 B_{HkQ.PW  
   Else M1oPOC\0.  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) No`|m0 :j  
   End If {=3J/)='  
   'ff_angle = nn 
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   ff_angle = nn * 180 / 3.14159265258979 'yp>L|  
End Function

'判断点在区域内函数 Btj#EoSI_  
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 hd+]Ok7"  
Dim aob, boc, cod, doa, sum As Single UMV)wy|j  
  If ppx = p1x And ppy = p1y Then #j;Tb2&w  
     point_in = True ]' Y|Nl  
     Exit Function w|IjQ1{  
  End If eD%HXGe  
  If ppx = p2x And ppy = p2y Then a1Hz3y~S/  
     point_in = True 4&QUh+F  
     Exit Function UuU/c-.  
  End If X) V7bVW  
   If ppx = p3x And ppy = p3y Then <,"4k&0Q>V  
     point_in = True zh\p  
     Exit Function vY6oVjM  
  End If {
7*>Cv}  
     E<tK4?i"  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) {~SaRB2<'  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) H`~;|6}]n  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) DAfyK?
+UL  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) OS-sk!  
    sum = aob + boc + cod + doa Z(j{F<\jS  
    If 360.01 > sum And sum > 359.99 Then 1B|8ZmFJj  
       point_in = True +TK3{5`!Ae  
    Else )p<WDiX1!e  
       point_in = False a5@z:i  
    End If F]UQuOR)  
End Function

'得到点半径,得到交点坐标函数 W3r?7!~  
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() "5C`,4s  
    '求得中心点坐标 aZ Xmlq  
Dim tt As String +uo{ m~_4  
Dim rt(3) As Single %dMqpY7"  
    '判断是否平行 Q8D&tJg  
   acx = p3x - p1x ]}Z4P-"t  
   acy = p3y - p1y z0%\OhuCcf  
   bdx = p4x - p2x MZ
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   bdy = p4y - p2y !ErH~<f%K  
   If acx * bdy = acy * bdx Then )?=YT  
      rt(0) = 0 b0v:12q  
      Exit Function ujFzJdp3k  
   Else QSw<%pcJE@  
      '判断斜率存在否 0*;O?T  
      If p1x = p3x And p2x <> p4x Then Su8|R"qU  
         tt = "ac_n_bd_y" 7j$Pt8$  
      ElseIf p1x <> p3x And p2x = p4x Then P`$!@T0=
 
         tt = "ac_y_bd_n" 0nJE/JZ  
      ElseIf p1x <> p3x And p2x <> p4x Then xYfD()w<I  
         tt = "ac_y_bd_y" eS+g|$c
W  
      End If JIm4vS  
    Select Case tt KS}hU~
 
         Case "ac_n_bd_y" 31WC=ur5  
            'bd线段方程 @{hd{>K*  
            k_bd = bdy / bdx q%(EYM5Y  
            b_bd = p2y - k_bd * p2x C NsNZJ  
            p_x = p1x @I`C#~  
            p_y = k_bd * p_x + b_bd urBc=3Rz  
         Case "ac_y_bd_n" 3S*AxAeg  
            'ac线段方程 t?c}L7ht  
            k_ac = acy / acx 0NDftcB]  
            b_ac = p1y - k_ac * p1x oF]cTAqhC.  
            p_x = p2x 80b;I|-T,  
            p_y = k_ac * p_x + b_ac O.G'?m<:#  
        Case "ac_y_bd_y" >Dw~POMy  
           'ac，bd线段都要求 nDS}^Ba  
           k_ac = acy / acx XV3C`:b  
           b_ac = p1y - k_ac * p1x }`(N:p  
           k_bd = bdy / bdx P{
OAV+cG  
           b_bd = p2y - k_bd * p2x KRAcnY;u  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) t.
T UmJ  
           p_y = k_ac * p_x + b_ac v+7kU=  
        End Select ?BA]7M(,4  
      rt(1) = p_x fhPkEvJ  
      rt(2) = p_y +mj*o(  
     gTl<wo +  
'计算最大半径 -l~Z0U>^  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) N;Dp~(1 J1  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) E`int?C!  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 5r~#0Zf*  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 6!x&LoM  
Dim bb(5) As Single ^G&3sF}  
  bb(1) = rr1 ho8`sh>N  
  bb(2) = rr2 3@+b}9s8  
  bb(3) = rr3 X cr  =  
  bb(4) = rr4 ,.iRnR  
  nb = rr1 -fhN"B)  
For i = 1 To 4 \B F*m"lz  
    If nb <= bb(i) Then >~%e$a7}+  
       nb = bb(i) &Z(K6U#.  
    End If qm/Q65>E  
Next i ZkL8
e  
    rt(0) = Sqr(nb) :B3[:Mp
L}  
    rr = rt() )?+$x[f!*  
  End If P-F)%T[  
         d->|EJP  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  asJ)4ema  

KK@.~
'd  
有热压工艺方面的人才或者资料分享下； \U@rg4  
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 fS^!ZPe1  

高手真多！

楼主威武霸气.