[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： t0#[#I1+  
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aVe/ gE  

关键点说几个： -@IL"U6  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 7W9~1 .SC  
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 !7U\J]  
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 N8!TZ~1$  

以下是几个重要的函数： (tl}q3U  
1.判断点在区域中函数 _a+ICqR  
2.计算夹角函数 !U BVPR*  
3.转置函数 u8OxD  
4.得到区域中心点，及区域半径函数 T+RZ  
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） L8V3BH7B  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 k_3
j '  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single V2yveNz\7  
   cax = x2 - x1 ,
w&:_n  
   cay = y2 - y1 =s'7$D}0.  
   cbx = x2 - x3 w{'2q^>6*  
   cby = y2 - y3 v3JPE])/  
   mo_jj = cax * cbx + cay * cby ^t78jfl  
   mo_ca = Sqr(cax * cax + cay * cay) ma9ADFFT  
   mo_cb = Sqr(cbx * cbx + cby * cby)
2q%K)h  
   cos_acb = mo_jj / (mo_ca * mo_cb) }f}IA\8]  
   'ff_cos = cos_acb 3#Y3Dz`  
   If cos_acb >= 1 Then C(,=[Fi-  
   nn = 0 O}gX{_|6  
   ElseIf cos_acb <= -1 Then DuF7HTN[K  
   nn = 3.14159265258979 7Qh_8
M  
   Else @8"18HEp#  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Yg6I&#f7&  
   End If #'>?:k  
   'ff_angle = nn cw+g z!!  
   ff_angle = nn * 180 / 3.14159265258979 a{_ KSg  
End Function

'判断点在区域内函数 pAg$oe#  
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 Wy(pLBmb  
Dim aob, boc, cod, doa, sum As Single H'h#wV`(  
  If ppx = p1x And ppy = p1y Then q2!'==h2i  
     point_in = True G{A)H_o*  
     Exit Function 01nsdZ-  
  End If qG^_c;l6
a  
  If ppx = p2x And ppy = p2y Then k2
OM="Ei}  
     point_in = True (zm
Na}-  
     Exit Function .b _?-Fv  
  End If [`
'd#pR  
   If ppx = p3x And ppy = p3y Then q5?L1  
     point_in = True ! o^Ic`FhS  
     Exit Function H56 ^n<tg  
  End If h^d\xn9GT#  
     .M+v?Ad  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 4OEKx|:5n  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) yId;\o B  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) >i`8R  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) E&9!1!B
 
    sum = aob + boc + cod + doa C.HYS S  
    If 360.01 > sum And sum > 359.99 Then SW;HjQ>V  
       point_in = True "<*nZ~nE)  
    Else *]'qLL7d  
       point_in = False V{FE[v_  
    End If bpnv&EG  
End Function

'得到点半径,得到交点坐标函数 enPLaiJ'|q  
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() .c:)Qli  
    '求得中心点坐标 >"bnpYSe  
Dim tt As String ($:y\,5(9I  
Dim rt(3) As Single %GS\1 Q%  
    '判断是否平行 ~z>BfL  
   acx = p3x - p1x S{ey@X(  
   acy = p3y - p1y qf)C%3gXI  
   bdx = p4x - p2x gjQ=8&i  
   bdy = p4y - p2y $^K]&Mft  
   If acx * bdy = acy * bdx Then 4XD)E&  
      rt(0) = 0 Ny B&uf  
      Exit Function 1N>6rN  
   Else }ymc5-  
      '判断斜率存在否 FXeV6zfrE  
      If p1x = p3x And p2x <> p4x Then m]1!-`(*  
         tt = "ac_n_bd_y" 7:h<`_HT(X  
      ElseIf p1x <> p3x And p2x = p4x Then ||`qIElAW,  
         tt = "ac_y_bd_n" l3BD <PB2S  
      ElseIf p1x <> p3x And p2x <> p4x Then .
E#<fz  
         tt = "ac_y_bd_y" 61L7 -~  
      End If 6{ C Fe|XN  
    Select Case tt 3y/1!A3  
         Case "ac_n_bd_y" V8\$`NEP  
            'bd线段方程 Esb?U|F4  
            k_bd = bdy / bdx QTeFR&q8  
            b_bd = p2y - k_bd * p2x H/pcXj  
            p_x = p1x q%DVDq( z  
            p_y = k_bd * p_x + b_bd Z6NJ)XQy6F  
         Case "ac_y_bd_n" `(!W s\:  
            'ac线段方程 >/8ru*Oc  
            k_ac = acy / acx m';#R9\Fz  
            b_ac = p1y - k_ac * p1x sE-x"c  
            p_x = p2x Q6eN+i2 ;  
            p_y = k_ac * p_x + b_ac {ip=iiW2  
        Case "ac_y_bd_y" //~POm
  
           'ac，bd线段都要求 " \`BPN  
           k_ac = acy / acx g&
q]@m  
           b_ac = p1y - k_ac * p1x ]c5DOv&  
           k_bd = bdy / bdx (rAiDRQ[  
           b_bd = p2y - k_bd * p2x ss/h[4h4h  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) l_bL,-|E8  
           p_y = k_ac * p_x + b_ac N?\bBt
@  
        End Select vlAO z  
      rt(1) = p_x hx*HY%\P  
      rt(2) = p_y O>nK,.  
     /tG5!l  
'计算最大半径 ^WmGo]<B_  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 1]_?$)$T  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) C:rRK*  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) D~5yj&&T;  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) GSC{F#:z  
Dim bb(5) As Single i5.?g<.H  
  bb(1) = rr1 '`9%'f)  
  bb(2) = rr2 gW'P`Oxw  
  bb(3) = rr3 1d/NZJ9  
  bb(4) = rr4 >_&~!Y.Z=  
  nb = rr1 ,2RC|h^O,  
For i = 1 To 4 j?Cr31  
    If nb <= bb(i) Then d&NCFx  
       nb = bb(i) S
Ad97A:  
    End If @c6"RHG9  
Next i P{"WlJ  
    rt(0) = Sqr(nb) C(EYM$  
    rr = rt() <\E"clZI  
  End If kuWK/6l4  
         c:3@[nF~  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ](B&l{V  

^>,<*p  
有热压工艺方面的人才或者资料分享下； '+o:,6  
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 c[wQJc  

高手真多！

楼主威武霸气.