[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： }`qAb/Ov  
d:)#-x*h7  

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图片:2.jpg

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关键点说几个： 4>,X.|9{  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ,@ '^3u  
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 UGAV"0  
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 T.da!!'B f  

以下是几个重要的函数： JI>Y?1i0O  
1.判断点在区域中函数 O,r;-t4vYU  
2.计算夹角函数 R1zt6oY  
3.转置函数 4p"'ox#  
4.得到区域中心点，及区域半径函数 OHndZ$'fI  
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） +4 k=Y  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 gKh*q.  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 0=>$J WF  
   cax = x2 - x1 !+SL=xy!{  
   cay = y2 - y1 RRja{*R  
   cbx = x2 - x3 %Y&48''"  
   cby = y2 - y3 0x<ASfka  
   mo_jj = cax * cbx + cay * cby {T8;-H0H  
   mo_ca = Sqr(cax * cax + cay * cay) lsax.uG5x  
   mo_cb = Sqr(cbx * cbx + cby * cby) $9G& wH>{  
   cos_acb = mo_jj / (mo_ca * mo_cb) "W(D0oy  
   'ff_cos = cos_acb h`6 (Oo|  
   If cos_acb >= 1 Then ZVXPp-M  
   nn = 0 d2
7q,2f!  
   ElseIf cos_acb <= -1 Then <H^jbK  
   nn = 3.14159265258979 |u>V> PN  
   Else s,Gl{  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) A
Myg>n!  
   End If *q6XK_  
   'ff_angle = nn -m^-p  
   ff_angle = nn * 180 / 3.14159265258979 <1*kXTN(  
End Function

'判断点在区域内函数 as@8L|i*  
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P-,2!r  
Dim aob, boc, cod, doa, sum As Single ^Q#_  
  If ppx = p1x And ppy = p1y Then Z'i@;^=A  
     point_in = True <6(0ZO%,C!  
     Exit Function 6_%Cd`4Z  
  End If Fn5BWV  
  If ppx = p2x And ppy = p2y Then 2.Z#\6Vj  
     point_in = True kEh\@x[  
     Exit Function Y*BmBRN  
  End If &
h/r]KrZ  
   If ppx = p3x And ppy = p3y Then ddgDq0N1j  
     point_in = True uqcG3Pi  
     Exit Function vhF9|('G  
  End If HVa D  
     TyV~2pcN  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) k'8q/]  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ~Z5AImR|  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) G y[5'J
`  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) WD%(RC"Q  
    sum = aob + boc + cod + doa >12jUm)  
    If 360.01 > sum And sum > 359.99 Then O[ z0+Q?6Z  
       point_in = True I3>8B  
    Else *Hx*s_F  
       point_in = False +[ ?!@)  
    End If -. *E<%  
End Function

'得到点半径,得到交点坐标函数 )bg|l?  
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() v/ Ge+o0K  
    '求得中心点坐标 mo<*h&;&  
Dim tt As String |"K%Tvxe  
Dim rt(3) As Single c(1tOQk.  
    '判断是否平行 ~ox}e(xy  
   acx = p3x - p1x 1)c{;x&W  
   acy = p3y - p1y 29grbP  
   bdx = p4x - p2x _xAru9=n^  
   bdy = p4y - p2y X_'tgP9  
   If acx * bdy = acy * bdx Then r??_2>Q  
      rt(0) = 0 O^\:J2I(  
      Exit Function %( OP  [  
   Else AO`@&e]o  
      '判断斜率存在否 hbYstK;]Z  
      If p1x = p3x And p2x <> p4x Then D 6'd&U{_  
         tt = "ac_n_bd_y" :JSxsA6k  
      ElseIf p1x <> p3x And p2x = p4x Then 7[=G;2<  
         tt = "ac_y_bd_n" ZNH-0mk  
      ElseIf p1x <> p3x And p2x <> p4x Then ^;/~$  
         tt = "ac_y_bd_y" "yH?df2
4  
      End If oC" [rn  
    Select Case tt S
8qg"YR  
         Case "ac_n_bd_y" Re~6'  
            'bd线段方程 ~hq\XQX  
            k_bd = bdy / bdx >&HW6 c  
            b_bd = p2y - k_bd * p2x ds`YVXKH  
            p_x = p1x vFHeGq70j  
            p_y = k_bd * p_x + b_bd }o]}R#|  
         Case "ac_y_bd_n" &wU"6E  
            'ac线段方程 _886>^b@  
            k_ac = acy / acx #NyO'  
            b_ac = p1y - k_ac * p1x \ o2oQ3  
            p_x = p2x nN$.^!;&  
            p_y = k_ac * p_x + b_ac L[44D6Vg  
        Case "ac_y_bd_y" ~I N g9|  
           'ac，bd线段都要求 .4ww5k>  
           k_ac = acy / acx Mh3.GpS  
           b_ac = p1y - k_ac * p1x l'<&H#A;'  
           k_bd = bdy / bdx fwUvFK1G  
           b_bd = p2y - k_bd * p2x ag8)^p'9  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) VS4Glx73  
           p_y = k_ac * p_x + b_ac Ib{#dhV  
        End Select CV HKP[-  
      rt(1) = p_x $-^&AKc  
      rt(2) = p_y +D @B eQu  
     sh,4n{+  
'计算最大半径 YL`MLt4MC  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) V%[t'uh  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) >4bw4 Z1  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) \a0{9Xx F  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) q8ZxeMqx%  
Dim bb(5) As Single |5>A^a  
  bb(1) = rr1 J|jvqt9C  
  bb(2) = rr2 tHaHBx1P  
  bb(3) = rr3 +EA ")T<l  
  bb(4) = rr4
8=bn TJf  
  nb = rr1 ?$)a[UnqX  
For i = 1 To 4 cb'Y
a_  
    If nb <= bb(i) Then 6VQQI9  
       nb = bb(i) F+VNrt-  
    End If 1 39T*0C  
Next i xxzUey  
    rt(0) = Sqr(nb) QNE/SSL  
    rr = rt() ;*K;)C  
  End If [x?9<#T  
         g#fn(A  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  4S+E%b|)  

EHl~y=9  
有热压工艺方面的人才或者资料分享下； `6YN/"unfp  
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 \Lbwfd=  

高手真多！

楼主威武霸气.