[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： ,yqzk.  
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关键点说几个： F@*lR(4C  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） /j)VES  
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 ~ghz%${`  
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 _9@?Th&_e  

以下是几个重要的函数： M$W#Q\<*#r  
1.判断点在区域中函数 !bcbzg2d&  
2.计算夹角函数 &+j
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3.转置函数 xI4I1"/  
4.得到区域中心点，及区域半径函数 9aU:[]w   
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） ._&lG3'  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 BR^J y<^F'  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single bQy%$7UmX,  
   cax = x2 - x1 J=X% xb  
   cay = y2 - y1 =[K)<5,@  
   cbx = x2 - x3 hu|hOr8  
   cby = y2 - y3 ]X~g@O{>_  
   mo_jj = cax * cbx + cay * cby !ix<|F5  
   mo_ca = Sqr(cax * cax + cay * cay) ^B5cNEO  
   mo_cb = Sqr(cbx * cbx + cby * cby) uK:-g,;  
   cos_acb = mo_jj / (mo_ca * mo_cb) 0Mu8ZVI{  
   'ff_cos = cos_acb unnx#e]  
   If cos_acb >= 1 Then Hm VTfH'  
   nn = 0 ]kkBgjQbS  
   ElseIf cos_acb <= -1 Then ~{vdP=/WP  
   nn = 3.14159265258979 -?nT mzRc  
   Else ING_:XpnJ  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ij(4)=  
   End If GWInN8.5  
   'ff_angle = nn U('<iw,Yy  
   ff_angle = nn * 180 / 3.14159265258979 %p2x^air  
End Function

'判断点在区域内函数 'n[+r}3  
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 W/r mm*  
Dim aob, boc, cod, doa, sum As Single vA;F]epr!  
  If ppx = p1x And ppy = p1y Then +F o$o  
     point_in = True QG|GXp_q`  
     Exit Function ls24ccOs  
  End If k9)u3  
  If ppx = p2x And ppy = p2y Then *?bk?*?s  
     point_in = True <.WM-Z  
     Exit Function PDt<lJU+X  
  End If vV.~76AD5  
   If ppx = p3x And ppy = p3y Then r)p2'+}pV  
     point_in = True *1W,Mzg  
     Exit Function (~Uel1~@  
  End If A!{.|x[S44  
     qEJ8o.D-=  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) {@V3?pG?p  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) )@,90Vhh  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) t@(9ga(  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 9Yl8ndP^E  
    sum = aob + boc + cod + doa 30?LsYXL62  
    If 360.01 > sum And sum > 359.99 Then ojx'g8yO  
       point_in = True V3mjbH>F  
    Else sm;E2BR$ `  
       point_in = False m-ph}  
    End If #P%1{l5m  
End Function

'得到点半径,得到交点坐标函数 2W3NL|P  
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() =.36y9Mfo  
    '求得中心点坐标 kmlG3hOR,  
Dim tt As String ]C16y. ~e  
Dim rt(3) As Single rQ~\~g[tP  
    '判断是否平行 JF~1'"_f:  
   acx = p3x - p1x sI&i{D  
   acy = p3y - p1y vi]
r  
   bdx = p4x - p2x *jM_
wwG  
   bdy = p4y - p2y =db'#m{$  
   If acx * bdy = acy * bdx Then C8IkpAD  
      rt(0) = 0 M{?zvq?d  
      Exit Function ,3Wb4so  
   Else iq"ob8.  
      '判断斜率存在否 #l*a~^dhqC  
      If p1x = p3x And p2x <> p4x Then .
dx 4,|6  
         tt = "ac_n_bd_y"  0]AN;  
      ElseIf p1x <> p3x And p2x = p4x Then 4q>7OB:e  
         tt = "ac_y_bd_n" {=UFk-$=  
      ElseIf p1x <> p3x And p2x <> p4x Then fdlvn*H  
         tt = "ac_y_bd_y" 6'xomRpYN  
      End If 5D,.^a1 A  
    Select Case tt d<Ggw#}:m  
         Case "ac_n_bd_y" -S"5{N73  
            'bd线段方程 AV40:y\RW  
            k_bd = bdy / bdx }]AT _bh,  
            b_bd = p2y - k_bd * p2x 'X =p7 d|'  
            p_x = p1x P$Z}  
            p_y = k_bd * p_x + b_bd {5^K Xj$B  
         Case "ac_y_bd_n" nX0HT )}  
            'ac线段方程 !FTNmyM~F  
            k_ac = acy / acx ^SZw`]  
            b_ac = p1y - k_ac * p1x L0rip5[;d  
            p_x = p2x +R-h ,$\=7  
            p_y = k_ac * p_x + b_ac u!Xb?:3uj  
        Case "ac_y_bd_y" ~C&*.ZR  
           'ac，bd线段都要求 *7ZGq(O  
           k_ac = acy / acx V=pMq?Nr  
           b_ac = p1y - k_ac * p1x UMV)wy|j  
           k_bd = bdy / bdx #j;Tb2&w  
           b_bd = p2y - k_bd * p2x ]' Y|Nl  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) w|IjQ1{  
           p_y = k_ac * p_x + b_ac N0i!l|G6  
        End Select U{6oLqwq3Y  
      rt(1) = p_x ~h
-C&G,v  
      rt(2) = p_y 5
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     @@I7$*  
'计算最大半径 vT|`%~Be  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) <5S@ORN  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) uG!:Z6%p  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) C{EAmv'  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ^/HW$8wEi  
Dim bb(5) As Single 0RUi\X4HI  
  bb(1) = rr1 )qL&%xz  
  bb(2) = rr2 H`~;|6}]n  
  bb(3) = rr3 $B;_Jo\|  
  bb(4) = rr4 ,~COZi;R.D  
  nb = rr1 H&#{l)  
For i = 1 To 4 h.)h@$d  
    If nb <= bb(i) Then v2Bzx/F:  
       nb = bb(i) ]hA,LY f  
    End If V A<5uk04K  
Next i + WVIZZ8  
    rt(0) = Sqr(nb) "-31'R-  
    rr = rt() QT! 4[,4  
  End If *O,H5lwU  
         k|xtrW`qo;  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  mLh kI!4[  

j;b42G~p  
有热压工艺方面的人才或者资料分享下； e~l#4{w  
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 h `}}  

高手真多！

楼主威武霸气.