[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： &Qmb?{S0  
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关键点说几个： Wm4C(y@  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） A b+qLh&?  
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 mqbCa6>_S  
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 $Gcj
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以下是几个重要的函数： %rV|{@J `  
1.判断点在区域中函数 b~2LD3"3  
2.计算夹角函数 <fE^S  
3.转置函数 M9G?^mW1sT  
4.得到区域中心点，及区域半径函数 nNeCi  
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）
!ST7@D  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 'u%vpvF  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 8llXpe  
   cax = x2 - x1 \4>w17qng  
   cay = y2 - y1 xm5?C>vu(  
   cbx = x2 - x3 K4]#X"  
   cby = y2 - y3 4|\
  
   mo_jj = cax * cbx + cay * cby ^nK7&]rK  
   mo_ca = Sqr(cax * cax + cay * cay) E
dTL]Xk  
   mo_cb = Sqr(cbx * cbx + cby * cby) |UB)q5I  
   cos_acb = mo_jj / (mo_ca * mo_cb) UFLx'VXd  
   'ff_cos = cos_acb jT/P+2hMW  
   If cos_acb >= 1 Then l`uMtv/Wp  
   nn = 0 ~2nt3
3"  
   ElseIf cos_acb <= -1 Then j5og}P
q:  
   nn = 3.14159265258979 n^b CrvD  
   Else K#'$_0.  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) $:# :"  
   End If %YbL%i|U  
   'ff_angle = nn fwmXIpteK  
   ff_angle = nn * 180 / 3.14159265258979  ?!<Q8=  
End Function

'判断点在区域内函数 }p-/R'  
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 ,0ilNi>  
Dim aob, boc, cod, doa, sum As Single Jt#HbAY  
  If ppx = p1x And ppy = p1y Then TvS<;0~K  
     point_in = True >56fa6=3@  
     Exit Function wt;`_}g  
  End If q`.=/O'  
  If ppx = p2x And ppy = p2y Then d[5v A/8O  
     point_in = True mq:WBSsV  
     Exit Function ^FQn\,  
  End If 7h0u7N  
   If ppx = p3x And ppy = p3y Then }s:3_9mE  
     point_in = True %IE;'aa }  
     Exit Function j%D{z5,nKm  
  End If XT*/aa-1'  
     o3eaNYa  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) (+0(A777M  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) /d">}%Jn  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) H+-x.l`  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) VbMud]40F  
    sum = aob + boc + cod + doa `p1B58deC  
    If 360.01 > sum And sum > 359.99 Then = Ezg3$%-  
       point_in = True PkZ1Db  
    Else c~ vql4  
       point_in = False $Ff6nc=  
    End If y\(xYB>T  
End Function

'得到点半径,得到交点坐标函数 7=yjd)Iy9m  
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() mxBx?xM-  
    '求得中心点坐标 0v9i43[S|J  
Dim tt As String :?LNP3}  
Dim rt(3) As Single 98| v.d  
    '判断是否平行 _?y3&4N)  
   acx = p3x - p1x ~3%\8,0  
   acy = p3y - p1y KaS*LDzw  
   bdx = p4x - p2x K7.a
yM 0  
   bdy = p4y - p2y %Tu(>vnuj  
   If acx * bdy = acy * bdx Then Y:#B0FD,gC  
      rt(0) = 0 !fd>wvJ,:  
      Exit Function &cTOr
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   Else +-SO}P  
      '判断斜率存在否 ;($xAAR  
      If p1x = p3x And p2x <> p4x Then PhV/WjCZ  
         tt = "ac_n_bd_y" S.`hl/  
      ElseIf p1x <> p3x And p2x = p4x Then ;&f(7 Q+T_  
         tt = "ac_y_bd_n" e6H}L:;  
      ElseIf p1x <> p3x And p2x <> p4x Then ~% t'}JDZ  
         tt = "ac_y_bd_y" 1*$6u5.=F  
      End If E(_k#X  
    Select Case tt ;I80<SZ  
         Case "ac_n_bd_y" ut]UU*g^$  
            'bd线段方程 u|.|dv'mbp  
            k_bd = bdy / bdx @$L
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            b_bd = p2y - k_bd * p2x -{J0~1'#-  
            p_x = p1x 7lAJ 0  
            p_y = k_bd * p_x + b_bd $cuBd  
         Case "ac_y_bd_n" #H4<8B  
            'ac线段方程 $%!06w#u  
            k_ac = acy / acx _ W#Km  
            b_ac = p1y - k_ac * p1x n@h$V\&\iM  
            p_x = p2x #O,w{S  
            p_y = k_ac * p_x + b_ac ( xzruI5P  
        Case "ac_y_bd_y" R/fE@d2~In  
           'ac，bd线段都要求 }.U(Gxu$  
           k_ac = acy / acx n9 FA`e  
           b_ac = p1y - k_ac * p1x ^_V0irv  
           k_bd = bdy / bdx WBJn1  
           b_bd = p2y - k_bd * p2x H^`J(J+  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) U(x$&um(l  
           p_y = k_ac * p_x + b_ac 7QZyd-  
        End Select \I/"W#\SJo  
      rt(1) = p_x vN@0
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      rt(2) = p_y Pg`+Q^^6S  
     lx0BKD?n  
'计算最大半径 ",[/pb  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) `1Md1e:J  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) b"}ya/  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) @MFEBc}  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) #nft{AN  
Dim bb(5) As Single B-L@
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  bb(1) = rr1 oa5L5Zr,A  
  bb(2) = rr2 =w8 0y'  
  bb(3) = rr3 C~K/yLCAi  
  bb(4) = rr4 )ezkp%I5D  
  nb = rr1 OEzSItAI/[  
For i = 1 To 4 '4
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    If nb <= bb(i) Then pNuU{:9 B0  
       nb = bb(i) Wnp[8IEU  
    End If S:xs[b.ZZ  
Next i RtxAIMzh?  
    rt(0) = Sqr(nb) KyDd( 'i  
    rr = rt() 0$Zh4Y  
  End If )' ,dP)b  
         p
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End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  gkx<<)y l  

`M_w^&6+n  
有热压工艺方面的人才或者资料分享下； lJ4/bL2I/  
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 E `%*lGu_  

高手真多！

楼主威武霸气.