[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： )p8I@E  
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关键点说几个： Ue$zH"w  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ~ y;y(4<  
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 }"zC >eX&  
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 |NrrTN?>  

以下是几个重要的函数： 4;KWG}~[o  
1.判断点在区域中函数 |}[nH>  
2.计算夹角函数 EO)%UrWnC  
3.转置函数 dDtFx2(R  
4.得到区域中心点，及区域半径函数 R1ktj  
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|=Hxq|-  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 I@ \#up}  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single o-eKAkh  
   cax = x2 - x1 vtxvS3   
   cay = y2 - y1 ohQAA h  
   cbx = x2 - x3 \u{8Bak0  
   cby = y2 - y3 YaY8 `M{  
   mo_jj = cax * cbx + cay * cby YQ(Po!NI\'  
   mo_ca = Sqr(cax * cax + cay * cay) +S~.c;EK  
   mo_cb = Sqr(cbx * cbx + cby * cby) cHD%{xlb  
   cos_acb = mo_jj / (mo_ca * mo_cb) u oVNK  
   'ff_cos = cos_acb HGDVOJq  
   If cos_acb >= 1 Then .36^[Jsz":  
   nn = 0 HJhH-\{@  
   ElseIf cos_acb <= -1 Then :w-`PYJ%G  
   nn = 3.14159265258979 4]XI"-M^D  
   Else 6)*xU|fU  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) >a>fb|r
 
   End If j"7 JLe*  
   'ff_angle = nn 85]SC$  
   ff_angle = nn * 180 / 3.14159265258979 &ITuyGmF  
End Function

'判断点在区域内函数 TEVI'%F
  
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 <94G  
Dim aob, boc, cod, doa, sum As Single {aj/HFLNY  
  If ppx = p1x And ppy = p1y Then z&+ zl6  
     point_in = True .y4&rF$n  
     Exit Function pSAR/':eg  
  End If B~gV'(9g  
  If ppx = p2x And ppy = p2y Then mLwY]2T"  
     point_in = True sQ1jrkm  
     Exit Function eaZQ2  
  End If Nhf~PO({&  
   If ppx = p3x And ppy = p3y Then sH!O0WL  
     point_in = True LAs7>hM  
     Exit Function Dpqt;8"2L  
  End If }Uw#f@Wh  
     z
V.pol  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) [aW=  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) \e:d)^cbh  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 4A.Q21s  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) tIZ~^*'  
    sum = aob + boc + cod + doa f~M8A.  
    If 360.01 > sum And sum > 359.99 Then )ly ^Ox  
       point_in = True UQ8bN I7  
    Else JWHSnu!  
       point_in = False :pC;`iQ  
    End If Vb4;-?s_  
End Function

'得到点半径,得到交点坐标函数 <[Oo*:A!7  
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() $&{IKP)u  
    '求得中心点坐标 rU\[SrIhz  
Dim tt As String trYTs,KV  
Dim rt(3) As Single yI8tH!  
    '判断是否平行 W{Q)-y  
   acx = p3x - p1x
~brFo2  
   acy = p3y - p1y "QY1.:o<(  
   bdx = p4x - p2x >mm'-P  
   bdy = p4y - p2y &7[[h+Lb  
   If acx * bdy = acy * bdx Then 4<v;1   
      rt(0) = 0 ijYvqZ_  
      Exit Function vq6%Ey3Gix  
   Else 1:NS}r+>3.  
      '判断斜率存在否 hC<14  
      If p1x = p3x And p2x <> p4x Then
q-AN[_@  
         tt = "ac_n_bd_y" ]7/gJ>g,  
      ElseIf p1x <> p3x And p2x = p4x Then NGTe4Crx  
         tt = "ac_y_bd_n" AtHS@p  
      ElseIf p1x <> p3x And p2x <> p4x Then 9){  
         tt = "ac_y_bd_y" La,QB3K/  
      End If hnxc`VX>g  
    Select Case tt JOfV]eCL  
         Case "ac_n_bd_y" %}qbkkZ  
            'bd线段方程 8Qrpa o  
            k_bd = bdy / bdx (6qsKX  
            b_bd = p2y - k_bd * p2x nX5C<Ky  
            p_x = p1x HOPqxI(k  
            p_y = k_bd * p_x + b_bd ZF{~ih*^u  
         Case "ac_y_bd_n" 8;zDg$(  
            'ac线段方程 6?gi_3g  
            k_ac = acy / acx =>LZm+P  
            b_ac = p1y - k_ac * p1x 5 2Hqu>  
            p_x = p2x Y1\K;;X  
            p_y = k_ac * p_x + b_ac a6nlt?1?D  
        Case "ac_y_bd_y" s>[{}7ca  
           'ac，bd线段都要求 C{m&}g`  
           k_ac = acy / acx la, h  
           b_ac = p1y - k_ac * p1x fI:H8  
           k_bd = bdy / bdx aiux^V  
           b_bd = p2y - k_bd * p2x Sb"2Im>  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) L.)yXuo4  
           p_y = k_ac * p_x + b_ac ]Yz'8uts  
        End Select x ^vt; $  
      rt(1) = p_x S/Oxr%H  
      rt(2) = p_y Pes =aw  
     ExrY>*v  
'计算最大半径 4rp6 C/i  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ^.HWkS`e  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Gp|JU Fo  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) !,bPe5?Ql  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) pXW`+<g0  
Dim bb(5) As Single ,2zKQ2z  
  bb(1) = rr1 HeS'~Z$  
  bb(2) = rr2 V SAafux  
  bb(3) = rr3 )I9aC~eAD  
  bb(4) = rr4 0m=(W^c  
  nb = rr1 x_:hii?6V  
For i = 1 To 4 =cp;Q,t'9L  
    If nb <= bb(i) Then ?qT(3C9p  
       nb = bb(i) -c={+z "  
    End If A*0*sZ0  
Next i W"qL-KW  
    rt(0) = Sqr(nb) 8/q*o>[?  
    rr = rt() U[fSQ`&D  
  End If !0jq6[&  
         ScJu_Af  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  *fOIq88  

8ZzU^x  
有热压工艺方面的人才或者资料分享下；
;pCG9  
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 9XY|V<}  

高手真多！

楼主威武霸气.