[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： gi]ZG  
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图片:2.jpg

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关键点说几个： 0mexF@  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 7>i2OBkAhB  
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 9<s4yZF@x  
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 ~p*1:ij  

以下是几个重要的函数： $h28(K%  
1.判断点在区域中函数 xx8U$,Ng  
2.计算夹角函数 UG2w 1xqHw  
3.转置函数 N4UM82N  
4.得到区域中心点，及区域半径函数 xh0xSqDM  
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） eW8[I'v_&  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 HDIk9WC^  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 4]&<?"LSK  
   cax = x2 - x1 I&]G   
   cay = y2 - y1 GAEO$e:  
   cbx = x2 - x3 H+ZSPHs  
   cby = y2 - y3 >q7 %UK]&  
   mo_jj = cax * cbx + cay * cby 9=+-QdX+0]  
   mo_ca = Sqr(cax * cax + cay * cay) rwqv V^  
   mo_cb = Sqr(cbx * cbx + cby * cby) KN[d!}W:  
   cos_acb = mo_jj / (mo_ca * mo_cb) |4b)>8TL/  
   'ff_cos = cos_acb ?Zcj}e.r  
   If cos_acb >= 1 Then w+AuMc  
   nn = 0 #a9_
~\s  
   ElseIf cos_acb <= -1 Then $v27]"]  
   nn = 3.14159265258979 3/goCg  
   Else k#)
Ad*t  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) &%F@O<:  
   End If rPiNv 30L  
   'ff_angle = nn Fhj8lVvk  
   ff_angle = nn * 180 / 3.14159265258979 O\beKBT;  
End Function

'判断点在区域内函数 t#~?{i@m  
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 pGWA\}'  
Dim aob, boc, cod, doa, sum As Single y] V1b{9p  
  If ppx = p1x And ppy = p1y Then $k2)8#\  
     point_in = True ps1@d[
n  
     Exit Function ,4@|1z{bfm  
  End If N:BL=}V  
  If ppx = p2x And ppy = p2y Then ,=%nw]:  
     point_in = True WjMRH+  
     Exit Function 79Bg]~}Z  
  End If @LX6hm*}  
   If ppx = p3x And ppy = p3y Then UuJjO^t  
     point_in = True |X(2Zv^O  
     Exit Function @h?crJ6$  
  End If J !#Zi#8sF  
     Fi;VDK(V9  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) T] | d5E  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 'fW#7W  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) -q>^ALf|@>  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) kDsIp=  
    sum = aob + boc + cod + doa h/ep`-YaH  
    If 360.01 > sum And sum > 359.99 Then .YcN S%  
       point_in = True M'5'O;kn  
    Else l},NcPL`  
       point_in = False <$Yi]ty  
    End If Np,2j KF(  
End Function

'得到点半径,得到交点坐标函数 -T_\f?V88  
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() =_d%=m  
    '求得中心点坐标 +"!aM?o  
Dim tt As String CjZ2z%||=  
Dim rt(3) As Single (4+1lOd  
    '判断是否平行 Q< *8<Oo4g  
   acx = p3x - p1x H~fdbR  
   acy = p3y - p1y M?@pN<|  
   bdx = p4x - p2x y\PxR708  
   bdy = p4y - p2y uHM@h{r  
   If acx * bdy = acy * bdx Then :7b-$fm  
      rt(0) = 0
:`W|hE^  
      Exit Function o$J6 ~dn  
   Else GESXc$E8  
      '判断斜率存在否 f(Hu {c5yV  
      If p1x = p3x And p2x <> p4x Then Fb_S&!  
         tt = "ac_n_bd_y" PZOKrW  
      ElseIf p1x <> p3x And p2x = p4x Then "yh Pm  
         tt = "ac_y_bd_n" FC>d_=V  
      ElseIf p1x <> p3x And p2x <> p4x Then j6>tH"i  
         tt = "ac_y_bd_y" A WJWtUa  
      End If @.$MzPQQI  
    Select Case tt w6zBVi  
         Case "ac_n_bd_y" CZ=0mWfF  
            'bd线段方程 G\~^&BAC  
            k_bd = bdy / bdx aG27%(@  
            b_bd = p2y - k_bd * p2x SkP[|g'56  
            p_x = p1x &RY)o^g[4  
            p_y = k_bd * p_x + b_bd R@`rT*lJ  
         Case "ac_y_bd_n" #Z9L_gDp  
            'ac线段方程 HeIS;gfUY  
            k_ac = acy / acx 8LrK94  
            b_ac = p1y - k_ac * p1x P_Uutn~  
            p_x = p2x ?2`$3[ET-  
            p_y = k_ac * p_x + b_ac ZKdh%8C  
        Case "ac_y_bd_y" ; B$*)X9  
           'ac，bd线段都要求 &3DK^|Lq  
           k_ac = acy / acx dOXD{c  
           b_ac = p1y - k_ac * p1x TOT PzB  
           k_bd = bdy / bdx ~j&?/{7I  
           b_bd = p2y - k_bd * p2x *\ECf.7jz  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) MCy~@)-IN  
           p_y = k_ac * p_x + b_ac <DmTj$  
        End Select +/cgw,  
      rt(1) = p_x ==9ZFdf  
      rt(2) = p_y L;)v&a7[P  
     =,:K)  
'计算最大半径 Tg''1 Wl*  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) X47!E |*  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) i21QJ6jPcI  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) rsxRk7s@  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 8
hB.fau  
Dim bb(5) As Single u0]q`u/T  
  bb(1) = rr1 qgexb\x\4  
  bb(2) = rr2 nCaLdj?  
  bb(3) = rr3 }$aNOf%:  
  bb(4) = rr4 7),*3c')  
  nb = rr1 c@OP5L>{  
For i = 1 To 4 (%DRt4u<H  
    If nb <= bb(i) Then uPDaq ]A  
       nb = bb(i) Z_itu73I  
    End If aN'0}<s  
Next i vttrKVA  
    rt(0) = Sqr(nb) S0xIvzS  
    rr = rt() 0yQe5i}  
  End If ?( 12aU  
         !-(J-45  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  2nYiG)tg  

GdL4|xv  
有热压工艺方面的人才或者资料分享下； @Zh8 QI+  
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 Q.uR<C6)v  

高手真多！

楼主威武霸气.