[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： 8.bdN]zn  
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关键点说几个： GHWi
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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） Arc6d5Q  
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 0}$Zr*|;Y  
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 %-1-y]R|  

以下是几个重要的函数： Xt} 4B#  
1.判断点在区域中函数 RUco3fZ   
2.计算夹角函数 =p{55dR  
3.转置函数 ]ie38tX$  
4.得到区域中心点，及区域半径函数 wz`\RHL  
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） 'o}v{f  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 /{Mo'.=Z  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single <fSWX>pR  
   cax = x2 - x1 vG'6?%38  
   cay = y2 - y1 = y@*vl   
   cbx = x2 - x3 Eqizx~eqq  
   cby = y2 - y3 kx{LY`pY  
   mo_jj = cax * cbx + cay * cby #ME!G/  
   mo_ca = Sqr(cax * cax + cay * cay) f4 k  
   mo_cb = Sqr(cbx * cbx + cby * cby) H2kib4^i  
   cos_acb = mo_jj / (mo_ca * mo_cb) P K+rr.k]  
   'ff_cos = cos_acb a_Sp}s<J  
   If cos_acb >= 1 Then
/aTW X  
   nn = 0 JkShtLEr  
   ElseIf cos_acb <= -1 Then VdL*"i  
   nn = 3.14159265258979 baQORU=X  
   Else \+M6R<Qw  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) q]scKWYI  
   End If d4~;!#<  
   'ff_angle = nn /PZx['
g  
   ff_angle = nn * 180 / 3.14159265258979 #Mw 6>5}<  
End Function

'判断点在区域内函数 n1U!od  
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 *z
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Dim aob, boc, cod, doa, sum As Single N_^PoX935O  
  If ppx = p1x And ppy = p1y Then ;FGS(.mjlC  
     point_in = True gc\/A\F<  
     Exit Function ,&~-Sq)~  
  End If f\;w(_  
  If ppx = p2x And ppy = p2y Then Wsb>3J  
     point_in = True $d-$dM?R5  
     Exit Function :5sjF:@  
  End If Z;O!KsJ  
   If ppx = p3x And ppy = p3y Then s\zY^(v4  
     point_in = True Cnr=1E=  
     Exit Function <z#.J]  
  End If gvFJ~lL  
     BOOb{kcg  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) K0WX($z~;  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) %4wEAi$I  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 0q28Ulv9  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) q`'m:{8  
    sum = aob + boc + cod + doa Gf +>AjU'  
    If 360.01 > sum And sum > 359.99 Then KE.O>M,I.  
       point_in = True fig~z=m
  
    Else /Y=_EOS  
       point_in = False GorEHlvVh  
    End If bY-koJo  
End Function

'得到点半径,得到交点坐标函数 Vm?#~}T  
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() pIV|hb!G  
    '求得中心点坐标 /!JxiGn  
Dim tt As String _&(L{cFx6  
Dim rt(3) As Single k')H5h+Q=  
    '判断是否平行 %K+hG=3O  
   acx = p3x - p1x d~MY z6"  
   acy = p3y - p1y }3, 4B-8!  
   bdx = p4x - p2x cuC' o\f  
   bdy = p4y - p2y ])G|
U A.  
   If acx * bdy = acy * bdx Then q44vI  
      rt(0) = 0 n=)LB& m  
      Exit Function nrA 4N1  
   Else lI%RdA[  
      '判断斜率存在否 E,F^!4 rJ$  
      If p1x = p3x And p2x <> p4x Then MQDLC7Y.p5  
         tt = "ac_n_bd_y" qRgFVX+vc  
      ElseIf p1x <> p3x And p2x = p4x Then '4It>50b  
         tt = "ac_y_bd_n"  _X  
      ElseIf p1x <> p3x And p2x <> p4x Then "Bv V8
9  
         tt = "ac_y_bd_y" fN@ZJ~F%j  
      End If \[qxOZ{  
    Select Case tt ~+d{:WY  
         Case "ac_n_bd_y" #eN2{G=4+  
            'bd线段方程 "uP*pR^  
            k_bd = bdy / bdx ]8R@2L3s  
            b_bd = p2y - k_bd * p2x tAo$;|  
            p_x = p1x 1ni72iz\  
            p_y = k_bd * p_x + b_bd ps?su`  
         Case "ac_y_bd_n" m]*a;a'}#  
            'ac线段方程 am!ssF5s  
            k_ac = acy / acx YcV^Fqi!  
            b_ac = p1y - k_ac * p1x HL]J=Gh  
            p_x = p2x P3YM4&6XA  
            p_y = k_ac * p_x + b_ac
4s~X  
        Case "ac_y_bd_y"  3Z`"k2k  
           'ac，bd线段都要求 S(U9Dlyarg  
           k_ac = acy / acx %sPze]  
           b_ac = p1y - k_ac * p1x N34-z|"q  
           k_bd = bdy / bdx WVsj  
           b_bd = p2y - k_bd * p2x ~N
PhVlT  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) CJh,-w{wJ"  
           p_y = k_ac * p_x + b_ac }ng?Ar[  
        End Select `#w#!@s#@  
      rt(1) = p_x pEz^z9  
      rt(2) = p_y [E%g3>/mt  
     VwRZgL  
'计算最大半径 r~JGs
?GH  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) CS(XN>N  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 1_Ks*7vuq  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) tl{{Vc[  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) '^C *%"I]  
Dim bb(5) As Single qBcbMa9m  
  bb(1) = rr1 Nd"IW${Kg  
  bb(2) = rr2 T)%6"rPL3!  
  bb(3) = rr3 TQKcPVlE  
  bb(4) = rr4 R2?s NlF  
  nb = rr1 TBrwir  
For i = 1 To 4 }:YL'$:5!  
    If nb <= bb(i) Then l5=ih9u  
       nb = bb(i) 8X.= 6M  
    End If QcX\z\'vg  
Next i qy.$5-e:[9  
    rt(0) = Sqr(nb) ra6\+M~}e  
    rr = rt() jUKMDlH  
  End If yGNpx3H  
         2HSFMgy  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  vX6JjE!  

Rh)XYCM  
有热压工艺方面的人才或者资料分享下； tbR  
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 (M1YOK)I  

高手真多！

楼主威武霸气.