[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： Ur`v*LT}~  
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图片:2.jpg

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关键点说几个： @.})nU  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） !-QKh aY  
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 $*PyzLS  
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 gFKQm(0g2  

以下是几个重要的函数： $exu}%  
1.判断点在区域中函数 
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2.计算夹角函数 &~k/G  
3.转置函数 3oSQe"  
4.得到区域中心点，及区域半径函数 os2yiF",   
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） +Kk6|+5u  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Y`M.hYBXk  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 6sPd")%G  
   cax = x2 - x1 @}FRiPo6  
   cay = y2 - y1 f6m^pbQFl  
   cbx = x2 - x3 'n=FBu^  
   cby = y2 - y3 nZ{~@E2  
   mo_jj = cax * cbx + cay * cby 4 Hu+ljdjB  
   mo_ca = Sqr(cax * cax + cay * cay) _rajm J  
   mo_cb = Sqr(cbx * cbx + cby * cby) I($u L@$  
   cos_acb = mo_jj / (mo_ca * mo_cb)
ue`F|  
   'ff_cos = cos_acb ;BI{v^()s  
   If cos_acb >= 1 Then uZqo"  
   nn = 0 >6aCBS?2  
   ElseIf cos_acb <= -1 Then F~{4)`  
   nn = 3.14159265258979 KR{kn[2|Q  
   Else 0^.q5#A2  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) *fjarZu  
   End If \,?yj  
   'ff_angle = nn [*1c.&%(  
   ff_angle = nn * 180 / 3.14159265258979 MHgS5b2  
End Function

'判断点在区域内函数 <H$CCo  
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 //WgK{Mt  
Dim aob, boc, cod, doa, sum As Single jL2
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  If ppx = p1x And ppy = p1y Then 7}nOF{RH]  
     point_in = True KKOu":b  
     Exit Function ~M <4HC  
  End If 
+wQGC  
  If ppx = p2x And ppy = p2y Then <q_H 3|  
     point_in = True ^goS?p/z  
     Exit Function YpuA,r;"  
  End If H-I*;  
   If ppx = p3x And ppy = p3y Then IQH;`+  
     point_in = True ma-|L3 #  
     Exit Function f(9w FT  
  End If ~kYF/B2*  
     @w2}WX>  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Ir]b.6B  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) PUa~Apj'  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 4E"qpy \(  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) E6n;_{Se/S  
    sum = aob + boc + cod + doa RI%*5lM8;  
    If 360.01 > sum And sum > 359.99 Then *gBaF/C  
       point_in = True :pNZQX  
    Else
d*H-l3N  
       point_in = False NeNKOW#X  
    End If F.O2;M|x  
End Function

'得到点半径,得到交点坐标函数 bk5~t'  
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() K<N0%c~  
    '求得中心点坐标 _I@dt6oF  
Dim tt As String %d*}:295  
Dim rt(3) As Single {\
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    '判断是否平行 O1/!)E!  
   acx = p3x - p1x %zY3,4~  
   acy = p3y - p1y &M<431y  
   bdx = p4x - p2x k"AY7vq@!P  
   bdy = p4y - p2y slw^BK3t  
   If acx * bdy = acy * bdx Then #+r-$N.7  
      rt(0) = 0 {9P<G]Z  
      Exit Function #
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   Else wus]  
      '判断斜率存在否 }LE.kd&  
      If p1x = p3x And p2x <> p4x Then `L:wx5?  
         tt = "ac_n_bd_y" sba0Q[IY  
      ElseIf p1x <> p3x And p2x = p4x Then v^KJU +  
         tt = "ac_y_bd_n" js2?t~E]  
      ElseIf p1x <> p3x And p2x <> p4x Then W/J3sAYv  
         tt = "ac_y_bd_y" $|AvT;4  
      End If $BNn1C8[  
    Select Case tt )Q9J,  
         Case "ac_n_bd_y" E4 JS   
            'bd线段方程 .t\Yv/|`  
            k_bd = bdy / bdx a)}?rzT]  
            b_bd = p2y - k_bd * p2x *6k (xL  
            p_x = p1x h~<#1'/<  
            p_y = k_bd * p_x + b_bd }<S|_F  
         Case "ac_y_bd_n" s;$ eq);  
            'ac线段方程 BhNwC[G?m  
            k_ac = acy / acx W;j*lII  
            b_ac = p1y - k_ac * p1x %f?#) 01>  
            p_x = p2x spAYb<  
            p_y = k_ac * p_x + b_ac
|"l g4S%  
        Case "ac_y_bd_y" $k}+,tHtJO  
           'ac，bd线段都要求 R(x%<I  
           k_ac = acy / acx GY0<\-  
           b_ac = p1y - k_ac * p1x f61
~%@fE  
           k_bd = bdy / bdx 6I 2`m(5  
           b_bd = p2y - k_bd * p2x #bf^Pq'8  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) M*@MkN*u&  
           p_y = k_ac * p_x + b_ac BXm{x6\  
        End Select Ik~5j(^E-  
      rt(1) = p_x qOkw6jfluh  
      rt(2) = p_y c[ =9Z;|  
     \$9S_z
 
'计算最大半径 ?p\'S w:  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) C%G-Ye|@  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) {jr>Z"/q  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) v82@']IN  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) cj5pI?@e)  
Dim bb(5) As Single Z;lE-`Z*(F  
  bb(1) = rr1 ~d>O.*Q)  
  bb(2) = rr2 %lEPFp  
  bb(3) = rr3 ]}C#"Xt  
  bb(4) = rr4 <w08p*?  
  nb = rr1 ca$D|3  
For i = 1 To 4 Jg: Uv6eN+  
    If nb <= bb(i) Then u!;kBs  
       nb = bb(i) &a1ag
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    End If _U'edK]R  
Next i }|Cw]GW  
    rt(0) = Sqr(nb) vzs6YsA  
    rr = rt() Cf8(Jk`v|  
  End If h]G}E9\l  
         FVL0K(V(  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  vWjK[5 M%  

_ 4Hf?m7z  
有热压工艺方面的人才或者资料分享下； XlDVJx<&J  
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  YVD%GJ  

高手真多！

楼主威武霸气.