[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： w>pq+og&  
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关键点说几个： C 3^JAP  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） tr<Nm6!  
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 iW$_zgN  
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 =bfJ^]R  

以下是几个重要的函数： &v56#lG  
1.判断点在区域中函数 ?9!6%]2D  
2.计算夹角函数 /Lfm&;  
3.转置函数 Z"/p,A9W9|  
4.得到区域中心点，及区域半径函数 nCUg,;_=  
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） w mn+  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 t)~"4]{*}D  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single bp* ^z,w  
   cax = x2 - x1 BBaQ}{F8>2  
   cay = y2 - y1 t>L;kRujVJ  
   cbx = x2 - x3 R cAwrsd  
   cby = y2 - y3 Z?6%;n^ 54  
   mo_jj = cax * cbx + cay * cby V[RF</2T  
   mo_ca = Sqr(cax * cax + cay * cay) pV9IHs}  
   mo_cb = Sqr(cbx * cbx + cby * cby) p, h9D_  
   cos_acb = mo_jj / (mo_ca * mo_cb) >=qf/K+#  
   'ff_cos = cos_acb ynq}76 H0k  
   If cos_acb >= 1 Then Bc(Y(X$PK  
   nn = 0 ap.K=-H  
   ElseIf cos_acb <= -1 Then (jnQ -  
   nn = 3.14159265258979
I5`4Al  
   Else lNz7u:U3  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) b+%f+zz*h  
   End If |
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   'ff_angle = nn v_<rNc,z-s  
   ff_angle = nn * 180 / 3.14159265258979 P2NQHX  
End Function

'判断点在区域内函数 ]%hn`ZJ  
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 ?8I?'\F;  
Dim aob, boc, cod, doa, sum As Single fFMlDg[];  
  If ppx = p1x And ppy = p1y Then aAZZ8V  
     point_in = True cm&nd'A't  
     Exit Function '<jyw   
  End If <Q3oT  
  If ppx = p2x And ppy = p2y Then %D UH
@j  
     point_in = True *U^6u/iH  
     Exit Function srPWE^&  
  End If ls_'')yp  
   If ppx = p3x And ppy = p3y Then bENdMH";  
     point_in = True c>,'Y)8  
     Exit Function Sj-n;F|=X  
  End If 61Bwb]\f/|  
     .S!mf  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) e|NG"
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    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Gk. ruQW"  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) g%ndvdb m  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ,MdV;j~"'  
    sum = aob + boc + cod + doa i)o2klIkB  
    If 360.01 > sum And sum > 359.99 Then [/,)  
       point_in = True Nu0C;B66  
    Else e h&IPU S  
       point_in = False %r<rcY  
    End If ZEXc%-M  
End Function

'得到点半径,得到交点坐标函数 QsGiclU  
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() u~r=)His  
    '求得中心点坐标 pe0F0Ruy
 
Dim tt As String HpR]q05d  
Dim rt(3) As Single \(~y?l  
    '判断是否平行 ?RX3MUN
  
   acx = p3x - p1x w4_ U0 n3  
   acy = p3y - p1y O1rvaOlr  
   bdx = p4x - p2x qBU-~"2t  
   bdy = p4y - p2y ZufR{^W  
   If acx * bdy = acy * bdx Then JHW"-b  
      rt(0) = 0 4]rnY~  
      Exit Function )r';lGh2#  
   Else VGLaN%|  
      '判断斜率存在否 <z+t,<3D  
      If p1x = p3x And p2x <> p4x Then F@^~7ZmP`  
         tt = "ac_n_bd_y" x9NEFtqjm  
      ElseIf p1x <> p3x And p2x = p4x Then l+3[ KCE  
         tt = "ac_y_bd_n" zuP B6W^  
      ElseIf p1x <> p3x And p2x <> p4x Then LO'**}vm  
         tt = "ac_y_bd_y" IWBX'|}K  
      End If 2:*w~|6>}5  
    Select Case tt Y4%:7mw~=  
         Case "ac_n_bd_y" Pih tf4
i  
            'bd线段方程 m9)p-1y@5  
            k_bd = bdy / bdx 7;u e
 
            b_bd = p2y - k_bd * p2x `+`Z7  
            p_x = p1x BK*x] zG$  
            p_y = k_bd * p_x + b_bd .\K_@M  
         Case "ac_y_bd_n" Twh!X*uQ  
            'ac线段方程 kM!kD4&  
            k_ac = acy / acx Pnw]Tm}g  
            b_ac = p1y - k_ac * p1x PEN\-*Pv  
            p_x = p2x o-;E>N7t  
            p_y = k_ac * p_x + b_ac 6L:x^bM  
        Case "ac_y_bd_y" m2-Sx  
           'ac，bd线段都要求 R= a|Blp  
           k_ac = acy / acx 5NBV[EP  
           b_ac = p1y - k_ac * p1x -VZ-<\uH  
           k_bd = bdy / bdx 3E7ULK  
           b_bd = p2y - k_bd * p2x Ytgcs( /$  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) -HQQw$  
           p_y = k_ac * p_x + b_ac >82@Q^O  
        End Select %el"BSB  
      rt(1) = p_x 832v"kCD  
      rt(2) = p_y ()`7L|(`;q  
     9s_vL9u  
'计算最大半径 L9-h;] x!  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Ok{*fa.PK  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) tzZ63@cm  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) jNe`;o  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) "rTQG6`  
Dim bb(5) As Single ot@|!V  
  bb(1) = rr1 Q*~LCtrI  
  bb(2) = rr2 -7m:91x  
  bb(3) = rr3 "b?v?V0%C  
  bb(4) = rr4 ,_|]Ufr!a  
  nb = rr1 lT4Hn;tnN  
For i = 1 To 4 `/_o!(Z`  
    If nb <= bb(i) Then Gn&-X]Rrl  
       nb = bb(i) Z.d7U~_  
    End If )iq-yjO6  
Next i Z1zVwHa_  
    rt(0) = Sqr(nb) ! N|0x
`  
    rr = rt() 33jovK2  
  End If p/(~IC"!J  
         H&F9J^rC  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  5K^69mx  

RaWG w  
有热压工艺方面的人才或者资料分享下； \%/#x V  
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 y;t6sM@  

高手真多！

楼主威武霸气.