[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： "8BZj;yS  
AA&5wDMV>  
KF.d
:  

关键点说几个： x5Z(_hU  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域）  f^vz  
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 v}>5!*  
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 &_Vd  

以下是几个重要的函数： LOPw0@  
1.判断点在区域中函数 bS2)L4MQY  
2.计算夹角函数 $z":E(oy  
3.转置函数 3<:m;F*#  
4.得到区域中心点，及区域半径函数 ww^!|VVa  
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） {0?]weN*  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 C3#mmiL-  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single >oOZDuj  
   cax = x2 - x1 y wf@G; fK  
   cay = y2 - y1 :TTZ@
q  
   cbx = x2 - x3 "6} #65  
   cby = y2 - y3 JIYZ  
   mo_jj = cax * cbx + cay * cby +Vsd%AnN"l  
   mo_ca = Sqr(cax * cax + cay * cay) p>#QFd"m  
   mo_cb = Sqr(cbx * cbx + cby * cby) ?yq $ >Qba  
   cos_acb = mo_jj / (mo_ca * mo_cb) F%s'R 0l  
   'ff_cos = cos_acb &|j^?ro6  
   If cos_acb >= 1 Then OqW (C  
   nn = 0 0)Wrfa  
   ElseIf cos_acb <= -1 Then B?|url6h  
   nn = 3.14159265258979 Pm}
 
   Else *(pmFEc
 
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) G|,'6|$jE  
   End If 8`?vWJS  
   'ff_angle = nn _1sjsGp>  
   ff_angle = nn * 180 / 3.14159265258979 JS:AHJSz  
End Function

'判断点在区域内函数 N7WQ{/PSG  
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{/  
Dim aob, boc, cod, doa, sum As Single tI-u@ g  
  If ppx = p1x And ppy = p1y Then <8_~60  
     point_in = True 4#c-?mh_  
     Exit Function g/v"E+  
  End If hDsSOpj  
  If ppx = p2x And ppy = p2y Then 0wlKBwf`J  
     point_in = True w]ZE('3%W  
     Exit Function )kl(}.9X  
  End If +LEU|#  
   If ppx = p3x And ppy = p3y Then dRXEF6G  
     point_in = True y~ZYI]` J  
     Exit Function ^o@N.+`&<  
  End If 4{Q{>S*h  
     |_ u  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) FO/[7ZH  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) s;[OR  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) y {PUklq  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 2U Q&n`A  
    sum = aob + boc + cod + doa <RFT W}f!  
    If 360.01 > sum And sum > 359.99 Then aGRD`ra  
       point_in = True 6k@(7Mw8A  
    Else #@cOyxUt  
       point_in = False hfBZ:es+  
    End If $ZEwz;HNo  
End Function

'得到点半径,得到交点坐标函数 K\2UwX  
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() JO^E x1c  
    '求得中心点坐标 PU\?eA  
Dim tt As String @-ms_Z  
Dim rt(3) As Single t;?TXAA  
    '判断是否平行 />EH]-|  
   acx = p3x - p1x U~)i&":sN  
   acy = p3y - p1y {#]vvO2~$  
   bdx = p4x - p2x ^q$m>|KI  
   bdy = p4y - p2y `]0E)  
   If acx * bdy = acy * bdx Then REe<k<>p~  
      rt(0) = 0 #w *]`5 T  
      Exit Function D_W,Jm
et  
   Else j=Co  
      '判断斜率存在否 =mq02C~y  
      If p1x = p3x And p2x <> p4x Then dg?[gD8!4&  
         tt = "ac_n_bd_y" }z$_=v  
      ElseIf p1x <> p3x And p2x = p4x Then 3,QsB<9Is  
         tt = "ac_y_bd_n" X4D>  
      ElseIf p1x <> p3x And p2x <> p4x Then
3ZF-n`  
         tt = "ac_y_bd_y" 
yHka7D  
      End If #:5vN-9?  
    Select Case tt &QoV(%:]  
         Case "ac_n_bd_y" %~`y82r6  
            'bd线段方程 j?YZOO>X  
            k_bd = bdy / bdx t5qNfiKC  
            b_bd = p2y - k_bd * p2x C]xKdPQj%  
            p_x = p1x (}|QSf:  
            p_y = k_bd * p_x + b_bd t.7KS:  
         Case "ac_y_bd_n" )225ee>
 
            'ac线段方程 (q@DBb4  
            k_ac = acy / acx j>?0Y  
            b_ac = p1y - k_ac * p1x ];vEj*jCX  
            p_x = p2x ir-= @@  
            p_y = k_ac * p_x + b_ac %]zaX-2dm!  
        Case "ac_y_bd_y" nisW<Q`uB  
           'ac，bd线段都要求 
G/w&yd4  
           k_ac = acy / acx =xa:>Vh#  
           b_ac = p1y - k_ac * p1x QNk\y@yKw  
           k_bd = bdy / bdx 8l, R|$RKP  
           b_bd = p2y - k_bd * p2x mo$`a6[h<  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) \}:&Hl+  
           p_y = k_ac * p_x + b_ac R`_RcHY:  
        End Select 905%5\Y  
      rt(1) = p_x cr&sI=i  
      rt(2) = p_y bm &$wf  
     #K5)Rb-H  
'计算最大半径 mX2(SFpJar  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) |#6B<'e'  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 0&YW#L|J  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) RoG `U  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ?dJ[?<aG  
Dim bb(5) As Single  u Z(vf  
  bb(1) = rr1 h7}D//~p  
  bb(2) = rr2 <vP{U  
  bb(3) = rr3 OF4iGFw  
  bb(4) = rr4 ?D6?W6@  
  nb = rr1 '`/Qr~]  
For i = 1 To 4 3kA
hvL  
    If nb <= bb(i) Then sbxOnwP\  
       nb = bb(i) K
!JXsdHK  
    End If nkv+O$LXP  
Next i 'T8(md299  
    rt(0) = Sqr(nb) Ic%c%U=i  
    rr = rt() x8#bd{  
  End If ?8g*"&cn  
         C6$F.v  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  QR.]?t;1  

Y&G]M  
有热压工艺方面的人才或者资料分享下； F$|Ec9  
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 MPexc5_  

高手真多！

楼主威武霸气.