[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： @)U.Dbm  
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关键点说几个： #kC~qux^  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） )7 p" -  
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 Z Ts*Y,  
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 R0-0  

以下是几个重要的函数： kk=n&M  
1.判断点在区域中函数 <&E}db  
2.计算夹角函数 tRoSq;VrS  
3.转置函数 |}G"^r  
4.得到区域中心点，及区域半径函数 KR?;7*qF  
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） eGEwXza 4  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ~}_^$l8#-Q  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 07.p {X R  
   cax = x2 - x1 ]KFh1  
   cay = y2 - y1 CF;Gy L1M  
   cbx = x2 - x3 x@  =p  
   cby = y2 - y3 v<1@"9EH  
   mo_jj = cax * cbx + cay * cby Z[@ i/. I  
   mo_ca = Sqr(cax * cax + cay * cay) 5=TgOS]R  
   mo_cb = Sqr(cbx * cbx + cby * cby) !4p{b f  
   cos_acb = mo_jj / (mo_ca * mo_cb) ;?Pz0,{h  
   'ff_cos = cos_acb 9 /H~hEVK  
   If cos_acb >= 1 Then f+:iz'b#U  
   nn = 0 [E9iuym  
   ElseIf cos_acb <= -1 Then fJLl-H  
   nn = 3.14159265258979 \Tz|COG5h\  
   Else ='"Yj  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) p\[!=ZXFr\  
   End If x]7:MG$  
   'ff_angle = nn )w].m  
   ff_angle = nn * 180 / 3.14159265258979 )?jFz'<r  
End Function

'判断点在区域内函数 }%XB*pzQ  
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 m'2F#{  
Dim aob, boc, cod, doa, sum As Single "r6qFxY  
  If ppx = p1x And ppy = p1y Then 1sXCu|\q  
     point_in = True U.TZd"  
     Exit Function |lLe^FM  
  End If IgbuMEfL  
  If ppx = p2x And ppy = p2y Then 9':Ipf&x  
     point_in = True 7#)k-S!B  
     Exit Function le5@WG/x  
  End If $j- Fm:ZIA  
   If ppx = p3x And ppy = p3y Then x;
[)#>.'  
     point_in = True T.#_v#oM  
     Exit Function UA.Tp[u  
  End If />xEpR3_A  
     e,OXngC  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) :O
u~?q%X  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) $@VJ@JAe  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) w^L`"  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ~;(\a@ _  
    sum = aob + boc + cod + doa 72|gzm  
    If 360.01 > sum And sum > 359.99 Then 0/~p1SSun  
       point_in = True }6l:'nW  
    Else 7b1 yF,N  
       point_in = False w(HVC  
    End If Ow-ejo  
End Function

'得到点半径,得到交点坐标函数 Wda?$3!^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() N_D=j6B  
    '求得中心点坐标 oxFd@WV5  
Dim tt As String K;/f?3q  
Dim rt(3) As Single FBNi (D  
    '判断是否平行 O#tmB?n*  
   acx = p3x - p1x Rq15AR  
   acy = p3y - p1y ~a=]w#-KD  
   bdx = p4x - p2x ';eAaDM  
   bdy = p4y - p2y n}NUe`E_h  
   If acx * bdy = acy * bdx Then djf8FNnn  
      rt(0) = 0 Wr Wz+5M8  
      Exit Function h9Sf  
   Else qw4wg9w5p  
      '判断斜率存在否 '\H & EJ'  
      If p1x = p3x And p2x <> p4x Then hpOY&7QUTD  
         tt = "ac_n_bd_y" i_Lu  
      ElseIf p1x <> p3x And p2x = p4x Then x^3K=l;N  
         tt = "ac_y_bd_n" ;Qd'G7+  
      ElseIf p1x <> p3x And p2x <> p4x Then Q]/g=Nn ^~  
         tt = "ac_y_bd_y" PJb/tKC  
      End If |{MFo)  
    Select Case tt O0^Y1l  
         Case "ac_n_bd_y" H{P*d=9v  
            'bd线段方程 &}gH!5L m  
            k_bd = bdy / bdx [HXd|,~_j-  
            b_bd = p2y - k_bd * p2x TbMlYf]It  
            p_x = p1x +L?;g pVE&  
            p_y = k_bd * p_x + b_bd &hpznIN  
         Case "ac_y_bd_n" 6wiuNGZb  
            'ac线段方程 2QHu8mFU  
            k_ac = acy / acx Md
:*[]<~  
            b_ac = p1y - k_ac * p1x sC.cMZe  
            p_x = p2x _z^&zuO  
            p_y = k_ac * p_x + b_ac @zR_[s  
        Case "ac_y_bd_y" On4Vqbks  
           'ac，bd线段都要求 I<lkociUCG  
           k_ac = acy / acx $v{sb,  
           b_ac = p1y - k_ac * p1x l5e`m^GK  
           k_bd = bdy / bdx #I yM`YB0  
           b_bd = p2y - k_bd * p2x 7<Ut/1$MI  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) O6-"q+H)  
           p_y = k_ac * p_x + b_ac DKQQZ`PF  
        End Select ~}YgZ/U7T  
      rt(1) = p_x .R+n}>+K  
      rt(2) = p_y bxz6 >>  
     S r7EcT-  
'计算最大半径 r-BqIoVT  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) D//Ts`}+n  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) U,/9fzgd  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) wW/wvC-  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) h" YA>_1  
Dim bb(5) As Single
Th])jQ*  
  bb(1) = rr1 6l?KX  
  bb(2) = rr2 QZ-6aq\sgp  
  bb(3) = rr3 53^1;  
  bb(4) = rr4 b|Ed@C  
  nb = rr1 9hwn,=Vh)  
For i = 1 To 4 h1_KZ[X  
    If nb <= bb(i) Then wCr+/"t  
       nb = bb(i) e3&.RrA  
    End If $/i;UUd  
Next i ;S>ml  
    rt(0) = Sqr(nb) QEL3b4Vm  
    rr = rt() 0.Nik^~  
  End If 0Ioa;XgOn  
         ! F&{I  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  7,2b
R  

0"L_0 t:  
有热压工艺方面的人才或者资料分享下； 0Y9\,y_  
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 FHS6
Mk26  

高手真多！

楼主威武霸气.