[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： 4)k-gKS*  
+9|0\Q  
3 yb]d5:U  

关键点说几个： , .~k  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） j<~T:Tk  
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 !9YCuHj!p  
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 &0y`Gt  

以下是几个重要的函数： tu$rVwgM  
1.判断点在区域中函数 3h=kn@I  
2.计算夹角函数 9_jiUZFje  
3.转置函数 l4r>#n\yj  
4.得到区域中心点，及区域半径函数 N[\J#x!U  
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） s !2Iui @  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 5fiWo^s}  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single +"BJjxG  
   cax = x2 - x1 T*0;3&sA  
   cay = y2 - y1 %~M*<pN  
   cbx = x2 - x3 iEr?s-or  
   cby = y2 - y3 =fnBE`Uc  
   mo_jj = cax * cbx + cay * cby 'm6bfS^T  
   mo_ca = Sqr(cax * cax + cay * cay) n~\; +U  
   mo_cb = Sqr(cbx * cbx + cby * cby) C"**>OGe  
   cos_acb = mo_jj / (mo_ca * mo_cb) !DSm[Z1  
   'ff_cos = cos_acb ] L#c <0  
   If cos_acb >= 1 Then wf]?:'}  
   nn = 0 W]7<PL*u  
   ElseIf cos_acb <= -1 Then B'(zhjV  
   nn = 3.14159265258979 hI*v)c  
   Else @M-w8!.~  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) c"lwFr9x7  
   End If c;X,-Q9  
   'ff_angle = nn X-<,zRM  
   ff_angle = nn * 180 / 3.14159265258979 j|Vl\Z&o)  
End Function

'判断点在区域内函数 #CI0G  
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 a*X{hU9P  
Dim aob, boc, cod, doa, sum As Single :X'
B K4EN  
  If ppx = p1x And ppy = p1y Then +CdUr~6  
     point_in = True SZrc-f_  
     Exit Function I9+h-t  
  End If u4xtlGt5  
  If ppx = p2x And ppy = p2y Then >}~[ew  
     point_in = True wH@S$WT  
     Exit Function sPW:[  
  End If d@{12hq  
   If ppx = p3x And ppy = p3y Then KyVzf(^  
     point_in = True `Rt w'Uz  
     Exit Function %RtL4"M2j  
  End If ."BXA8c;A  
     srN7  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) [efU)O&  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ~<K,P   
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) LFi* O&  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) U7n#TPet  
    sum = aob + boc + cod + doa q\i&ERr  
    If 360.01 > sum And sum > 359.99 Then 7"aN7Q+EbI  
       point_in = True Et}%)M  
    Else ,|VLOY^  
       point_in = False mCg^Y)Q  
    End If z)^.ai,:0  
End Function

'得到点半径,得到交点坐标函数 [c1Gq)ht  
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() MLTS<pW/  
    '求得中心点坐标 f!YlYk5  
Dim tt As String ~PyS;L}  
Dim rt(3) As Single tx<^PV2  
    '判断是否平行 T`]%$$1s  
   acx = p3x - p1x k.54lNl  
   acy = p3y - p1y =d"5kDK-m  
   bdx = p4x - p2x RaSuzy^`*]  
   bdy = p4y - p2y 5p~5-_JX  
   If acx * bdy = acy * bdx Then (:E@kpK  
      rt(0) = 0 a)r["*bTx  
      Exit Function 9@"pR;X@  
   Else BH}Cx[n?~  
      '判断斜率存在否 J^#g?RHN>m  
      If p1x = p3x And p2x <> p4x Then ,!^c`_Q\>@  
         tt = "ac_n_bd_y" DS%]7,g]  
      ElseIf p1x <> p3x And p2x = p4x Then t D 8l0  
         tt = "ac_y_bd_n" _\k?uUo&,^  
      ElseIf p1x <> p3x And p2x <> p4x Then  H6nH  
         tt = "ac_y_bd_y" 4*f+np  
      End If Sw>>]UjU  
    Select Case tt X)RgXl{  
         Case "ac_n_bd_y" Io
 IhQ  
            'bd线段方程 ZZHQ?p-  
            k_bd = bdy / bdx kUGFg{"  
            b_bd = p2y - k_bd * p2x *rxYal4ad  
            p_x = p1x tXrKC  
            p_y = k_bd * p_x + b_bd )n9,?F#l  
         Case "ac_y_bd_n" a"O;DYh  
            'ac线段方程 ;q%z\gA  
            k_ac = acy / acx havmhS)O  
            b_ac = p1y - k_ac * p1x B<.\^fuS  
            p_x = p2x &D-z|ZjgHi  
            p_y = k_ac * p_x + b_ac
7y30TU  
        Case "ac_y_bd_y" 2x|FVp  
           'ac，bd线段都要求 xuqG)HthRS  
           k_ac = acy / acx KCZ<#ca^  
           b_ac = p1y - k_ac * p1x MK Sw  
           k_bd = bdy / bdx
b[:m[^  
           b_bd = p2y - k_bd * p2x Mby4(M+&n  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) Qp:m=f6@  
           p_y = k_ac * p_x + b_ac lZIJ[.  
        End Select F"M/gy  
      rt(1) = p_x :,qvqh][  
      rt(2) = p_y rzie_)a Y%  
     @C=gMn.E  
'计算最大半径 *6u2c%^  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) |XQ_4{  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) o>+mw|{  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ct,;V/Dx  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ?9eiT:2  
Dim bb(5) As Single Br<lP#u=G  
  bb(1) = rr1 T)q Uf H  
  bb(2) = rr2  yoe@]c=  
  bb(3) = rr3 >tMI%r  
  bb(4) = rr4 Hiwij,1
 
  nb = rr1 H*N{4zBB  
For i = 1 To 4 wRK27=\z  
    If nb <= bb(i) Then I} Q+{/?/  
       nb = bb(i) hD?6RVfG  
    End If UYy #DA  
Next i ra^%__N}  
    rt(0) = Sqr(nb) Fx1FxwIJ  
    rr = rt() ;{R;lF,  
  End If GZx*A S]+  
         >y#qn9rV1  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Y8lZ]IB  

FK-q-PKO#.  
有热压工艺方面的人才或者资料分享下； 1Q9Hs(s  
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 +NvpYz  

高手真多！

楼主威武霸气.