[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： >>"@0tO  
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图片:2.jpg

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关键点说几个： ]!N=Z }LD  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） O{Mn\M6  
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 bI_MF/r''  
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 z.?slYe[  

以下是几个重要的函数： OdNcuiLa  
1.判断点在区域中函数 [!8bjc]c
 
2.计算夹角函数 }gB^C3b6  
3.转置函数 6A}tA$*s7  
4.得到区域中心点，及区域半径函数 gj
zWW0C  
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） u47`&\  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ;l `Ufx  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single lN{>.q@V`r  
   cax = x2 - x1 p9mGiK4!  
   cay = y2 - y1 &0:Gj3`  
   cbx = x2 - x3 UvB\kIH  
   cby = y2 - y3 >i.$s  
   mo_jj = cax * cbx + cay * cby dLwP7#r  
   mo_ca = Sqr(cax * cax + cay * cay) ?i\V^3S n$  
   mo_cb = Sqr(cbx * cbx + cby * cby) Qu7ML]e?z  
   cos_acb = mo_jj / (mo_ca * mo_cb) #F2DEo^0  
   'ff_cos = cos_acb QZa^Cng~  
   If cos_acb >= 1 Then d(R8^v/L  
   nn = 0 h4MBw=Tz~  
   ElseIf cos_acb <= -1 Then @~N"MsF3  
   nn = 3.14159265258979 )1R[X!KQ7  
   Else @H(7Mt  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) qQO*:_ezzk  
   End If ,1lW`Krx  
   'ff_angle = nn dnXu(e%  
   ff_angle = nn * 180 / 3.14159265258979 -eS r  
End Function

'判断点在区域内函数 {)!ua7GF0H  
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 <mTo54g  
Dim aob, boc, cod, doa, sum As Single A=e1uBGA  
  If ppx = p1x And ppy = p1y Then F{.g05^y  
     point_in = True ]~f-8!$$R  
     Exit Function xy$aFPH!-  
  End If Gi$\th,  
  If ppx = p2x And ppy = p2y Then US-f<Wq  
     point_in = True 
+>[zn  
     Exit Function *`/4KMrq  
  End If -ik((qx_  
   If ppx = p3x And ppy = p3y Then D(dV{^} 9  
     point_in = True g}a+%Obb  
     Exit Function Dvl\o;  
  End If RF4B]Gqd  
     ;b=7m#5  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) HJpx,NU'  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) w-v8P`V  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) k*F9&-rtN  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) aM,g@'.=  
    sum = aob + boc + cod + doa }XpZgd$  
    If 360.01 > sum And sum > 359.99 Then ,kYX|8SO  
       point_in = True xt`a":lru  
    Else 1Ak0A6E  
       point_in = False FJ?]|S.?,  
    End If i??+5o@uTF  
End Function

'得到点半径,得到交点坐标函数 _25PyG  
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() \X]I: 0^j  
    '求得中心点坐标 t 0p  
Dim tt As String G2@'S&2@s  
Dim rt(3) As Single +x4*T  
    '判断是否平行 ,5 
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   acx = p3x - p1x ('d,Sh  
   acy = p3y - p1y ,MHF  
   bdx = p4x - p2x /!/Pk'p=/  
   bdy = p4y - p2y B/hQvA;(  
   If acx * bdy = acy * bdx Then gssEdJ  
      rt(0) = 0 ;9J6)zg !n  
      Exit Function G-]_ d  
   Else b0se-#+  
      '判断斜率存在否 ?"?AH/ED  
      If p1x = p3x And p2x <> p4x Then r(n>N0:0Ls  
         tt = "ac_n_bd_y" .O+,1&D5  
      ElseIf p1x <> p3x And p2x = p4x Then c5i7mx:.  
         tt = "ac_y_bd_n" 6KN6SN$  
      ElseIf p1x <> p3x And p2x <> p4x Then /@DJf\`vM  
         tt = "ac_y_bd_y" SVV-zz]3M  
      End If />>KCmc  
    Select Case tt R7FI{A  
         Case "ac_n_bd_y" WBzPSnS2  
            'bd线段方程 PBiA/dG[;  
            k_bd = bdy / bdx W}(T5D" 3x  
            b_bd = p2y - k_bd * p2x .=hVto[QC  
            p_x = p1x Lo}/k}3Sx  
            p_y = k_bd * p_x + b_bd *F(<:
3;2  
         Case "ac_y_bd_n" ; =*=P8&5  
            'ac线段方程 , BZ(-M  
            k_ac = acy / acx FZ8Qj8  
            b_ac = p1y - k_ac * p1x k%s,(2)30  
            p_x = p2x %Z*)<[cIE0  
            p_y = k_ac * p_x + b_ac "Z dI~
 
        Case "ac_y_bd_y" 'S#^70kt  
           'ac，bd线段都要求 v9t'CMU  
           k_ac = acy / acx 0+w(cf~6  
           b_ac = p1y - k_ac * p1x :kjs: 6f]  
           k_bd = bdy / bdx Ou f\%E<  
           b_bd = p2y - k_bd * p2x ]{ch
]m  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 2%H_%Zu9  
           p_y = k_ac * p_x + b_ac ,hT**(W  
        End Select AOTtAV_e  
      rt(1) = p_x T[cJ
  
      rt(2) = p_y F hyY+{%  
     )$*B  
'计算最大半径 7+6I~&x!Lz  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 5.kKg=a  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) YnCuF0>  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Ms+SJ5Lg  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) : 'pK  
Dim bb(5) As Single h 3  J&  
  bb(1) = rr1 ]2[\E~^KU  
  bb(2) = rr2 XuU>.T$]c  
  bb(3) = rr3 Z 2$S'}F  
  bb(4) = rr4 IiX2O(*ZE  
  nb = rr1 ~BnmAv$m[  
For i = 1 To 4 h]VC<BD6S  
    If nb <= bb(i) Then _u~`RlA  
       nb = bb(i) C]na4yE8  
    End If wDBU+Z  
Next i {L M Q  
    rt(0) = Sqr(nb)  (8/&  
    rr = rt() {D[z>I;D  
  End If +)_DaL E  
         MOuEsm;  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ]y"=/Nu-Ja  

,!P}Y[|  
有热压工艺方面的人才或者资料分享下； D@c@Dt  
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 STPRC&7;  

高手真多！

楼主威武霸气.