[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： . .je<  
T2_#[bk*d  

描述:请输入描述

图片:2.jpg

eh7r'DmAR  

关键点说几个： +|)#yE$aMh  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） N\e@$1  
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 NITx;iC  
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 $M<4Bqr  

以下是几个重要的函数： /lQ0`^yB  
1.判断点在区域中函数 q>4i0p8^  
2.计算夹角函数 VEKITBs  
3.转置函数 q/-j`'A_pb  
4.得到区域中心点，及区域半径函数 Hz3X*G\5b  
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） Y4!q 1]TGX  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 IX?%H!i  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single TaJn2cC^  
   cax = x2 - x1 tsVhPo]e0  
   cay = y2 - y1 }v,P3  
   cbx = x2 - x3 n$Fm~iPo,  
   cby = y2 - y3 B2WX#/lgd  
   mo_jj = cax * cbx + cay * cby oySM?ZE  
   mo_ca = Sqr(cax * cax + cay * cay) Z9~Wlt'?  
   mo_cb = Sqr(cbx * cbx + cby * cby) )nxIxr0d-  
   cos_acb = mo_jj / (mo_ca * mo_cb) )qXe`3d5  
   'ff_cos = cos_acb tg3JU\  
   If cos_acb >= 1 Then EXzNehO~e  
   nn = 0 A"VXs1>_^  
   ElseIf cos_acb <= -1 Then Cfb-:e$0  
   nn = 3.14159265258979 gt(nZ
  
   Else 3DvkoV  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) =u"|qD  
   End If EZRZ)h  
   'ff_angle = nn |o) _=Fx  
   ff_angle = nn * 180 / 3.14159265258979 :.df(1(RL  
End Function

'判断点在区域内函数 <qt%MM [Y  
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 9GaER+d|  
Dim aob, boc, cod, doa, sum As Single (1]@ fCd +  
  If ppx = p1x And ppy = p1y Then y36aoKH  
     point_in = True PQ]N>'v-  
     Exit Function 4FdH:os  
  End If /2cOZ1G;  
  If ppx = p2x And ppy = p2y Then ]+9:i!s  
     point_in = True Kp;o
?5H  
     Exit Function ^IkMRlJh%  
  End If =ab}.dWC  
   If ppx = p3x And ppy = p3y Then Q3Lqj2r  
     point_in = True YWFHiB7x
 
     Exit Function Ve) :I  
  End If I!'(>VlP7  
     SX;IUvVE5  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Ooy96M~
_G  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) x%&V!L  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) -v@^6bQVp  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) j,jUg}b  
    sum = aob + boc + cod + doa n//a;m  
    If 360.01 > sum And sum > 359.99 Then O v6=|]cW  
       point_in = True 8;3
F
TF  
    Else r'?&VS-Cj  
       point_in = False kk#d-! $[  
    End If <{kj}nxz  
End Function

'得到点半径,得到交点坐标函数 rD?o97  
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() JJXf%o0yq  
    '求得中心点坐标 k2;yl_7  
Dim tt As String gO36tc:ce  
Dim rt(3) As Single VF.S)='>Eu  
    '判断是否平行 0nAS4Az  
   acx = p3x - p1x m`aUz}Y>c  
   acy = p3y - p1y UqbE  
   bdx = p4x - p2x uc8>B&B%  
   bdy = p4y - p2y `h#JDcT;a  
   If acx * bdy = acy * bdx Then ><HXd+- sd  
      rt(0) = 0 %l,EA#89s  
      Exit Function ~8K~@e$./  
   Else LBR_Q0EP  
      '判断斜率存在否 @P/{x@J  
      If p1x = p3x And p2x <> p4x Then UQy+&;#5  
         tt = "ac_n_bd_y" $[e*0!e  
      ElseIf p1x <> p3x And p2x = p4x Then J u7AxTf~  
         tt = "ac_y_bd_n" e2v,#3Q\  
      ElseIf p1x <> p3x And p2x <> p4x Then ZN^Q!v  
         tt = "ac_y_bd_y" '|.u*M,b  
      End If nS#;<p$\  
    Select Case tt f,*e?9@;s  
         Case "ac_n_bd_y" N !:&$z-  
            'bd线段方程 h#>67gJV  
            k_bd = bdy / bdx e^fjla5  
            b_bd = p2y - k_bd * p2x N?p$-{  
            p_x = p1x NH/H+7,o  
            p_y = k_bd * p_x + b_bd ;2^=#7I?  
         Case "ac_y_bd_n" JdnZY.{S0  
            'ac线段方程 -.y3:^){^  
            k_ac = acy / acx 4*]`s|fbu  
            b_ac = p1y - k_ac * p1x LT!4pD:a  
            p_x = p2x 4Q.70  
            p_y = k_ac * p_x + b_ac y g7z?AZ  
        Case "ac_y_bd_y" v,s]:9f`\>  
           'ac，bd线段都要求 s_|wvOW)'  
           k_ac = acy / acx rB\UNXy  
           b_ac = p1y - k_ac * p1x \y=,=;yv  
           k_bd = bdy / bdx ;J<kG@  
           b_bd = p2y - k_bd * p2x ax$0J|}7  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) Xc.~6nYp  
           p_y = k_ac * p_x + b_ac U i;o/Z3  
        End Select DvGtO)5._  
      rt(1) = p_x ,}<v:!  
      rt(2) = p_y ;tj_vmZ@R  
     7@ZL(G  
'计算最大半径 &p*N8S8  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) w% M0Mu  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ^#%[  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) )pJzw-m"  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) SU:Cm:$  
Dim bb(5) As Single |h;MA,qva  
  bb(1) = rr1 F4@h}T5)  
  bb(2) = rr2 umj7-fh  
  bb(3) = rr3 Yq.Omr
!  
  bb(4) = rr4 nBQG.3  
  nb = rr1 ~ohW9Z1  
For i = 1 To 4 A="h}9ok  
    If nb <= bb(i) Then >q}EZC  
       nb = bb(i) <I}k%q'  
    End If $0WAhq  
Next i 9yQ[*  
    rt(0) = Sqr(nb) sUA)I%Q!  
    rr = rt() ,
30&VW##  
  End If \K?3LtJ  
         4&?%"2  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  eQNo'cz  

e!Y:UB2 7u  
有热压工艺方面的人才或者资料分享下； }_Jr[ia
B  
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 byoDGUv  

高手真多！

楼主威武霸气.