[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： ;s$,}O.  
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图片:2.jpg

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关键点说几个： 6M#}&Gv  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） R:5uZAx  
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 Ja7yq{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 Q{o]^tN  

以下是几个重要的函数： adtgNwg  
1.判断点在区域中函数 n`X}
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2.计算夹角函数 nu `R(2/  
3.转置函数 2{xf{)hO?  
4.得到区域中心点，及区域半径函数 4*&2D-8<K  
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） #|QA_5  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 =eQ'^3a  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single cKB1o0JsYJ  
   cax = x2 - x1 SQ057V>'=  
   cay = y2 - y1 gs(ZJO1 /L  
   cbx = x2 - x3 4C }#lW9  
   cby = y2 - y3 sdBB(  
   mo_jj = cax * cbx + cay * cby ]Jnrs  
   mo_ca = Sqr(cax * cax + cay * cay) owzcc-g  
   mo_cb = Sqr(cbx * cbx + cby * cby) iBk1QRdn  
   cos_acb = mo_jj / (mo_ca * mo_cb) IOY<'t+  
   'ff_cos = cos_acb PQrc#dfc|  
   If cos_acb >= 1 Then GE*%I1?]  
   nn = 0  ^+wA,r.  
   ElseIf cos_acb <= -1 Then 1nR\m+{  
   nn = 3.14159265258979 39bw,lRPV  
   Else Ae* 6&R4  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) =J`M}BBx  
   End If PU-L,]K  
   'ff_angle = nn ub]s>aqy   
   ff_angle = nn * 180 / 3.14159265258979 0*,]`A=  
End Function

'判断点在区域内函数
3b/J  
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 z,RjQTd  
Dim aob, boc, cod, doa, sum As Single p@eW*tE  
  If ppx = p1x And ppy = p1y Then QsBC[7<jd-  
     point_in = True P1&Irwb`  
     Exit Function i.gagb   
  End If }J6 y NoXu  
  If ppx = p2x And ppy = p2y Then 825 QS`  
     point_in = True a>&dAo}  
     Exit Function 2>g!+p Ox  
  End If s=Xg6D  
   If ppx = p3x And ppy = p3y Then %zN~%mJ
G  
     point_in = True Q"K`~QF"  
     Exit Function ;P^}2i[q>[  
  End If z8j7K'vV1  
     y>c Yw!  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) jEm=A8q  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) '26 ,.1  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) bZ}T;!U?I  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) zh5ovA%  
    sum = aob + boc + cod + doa 1-.(pA'  
    If 360.01 > sum And sum > 359.99 Then jP.dQj^j&  
       point_in = True 
t')%;N  
    Else bUe6f,8,  
       point_in = False ^*F'[!. p  
    End If 6M[OEI5  
End Function

'得到点半径,得到交点坐标函数 TVK*l*  
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() } a!HbH  
    '求得中心点坐标 ITZ}$=   
Dim tt As String EME}G42KN  
Dim rt(3) As Single 2>)::9e4  
    '判断是否平行 !T.yv5ge'  
   acx = p3x - p1x bQHJ}aCi  
   acy = p3y - p1y G1:"Gxja  
   bdx = p4x - p2x Kc`#~-`,(  
   bdy = p4y - p2y a``
Q}.ST  
   If acx * bdy = acy * bdx Then ;".]W;I*O  
      rt(0) = 0 ~n%]u! 6  
      Exit Function eIbz`|%3  
   Else SKo*8r   
      '判断斜率存在否 !Hj 7|5  
      If p1x = p3x And p2x <> p4x Then TlC?
?#  
         tt = "ac_n_bd_y" )!5"\eys  
      ElseIf p1x <> p3x And p2x = p4x Then <W/YC2b  
         tt = "ac_y_bd_n" AbB+<0  
      ElseIf p1x <> p3x And p2x <> p4x Then _+<AxE9\  
         tt = "ac_y_bd_y" "sed{?  
      End If Er|j\(jM  
    Select Case tt
5KW n>n  
         Case "ac_n_bd_y" *s?C\)x  
            'bd线段方程 ew,g'$drD  
            k_bd = bdy / bdx ?}No'E1!I  
            b_bd = p2y - k_bd * p2x  @4>?Y=#  
            p_x = p1x _3{8Zg  
            p_y = k_bd * p_x + b_bd A s8IjGNs{  
         Case "ac_y_bd_n" 9L>ep&u)^  
            'ac线段方程 u+ 8wBb5!  
            k_ac = acy / acx 7
2dd%  
            b_ac = p1y - k_ac * p1x Nk?L<'  
            p_x = p2x 5G=fJAG  
            p_y = k_ac * p_x + b_ac 9w-;d=(Q  
        Case "ac_y_bd_y" c22L]Sxo  
           'ac，bd线段都要求 E :UJ"6  
           k_ac = acy / acx LHs^Xo18  
           b_ac = p1y - k_ac * p1x |^O3~!JP(>  
           k_bd = bdy / bdx hYVy65Ea  
           b_bd = p2y - k_bd * p2x J74kK#uF=  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) T/q*k)IoR  
           p_y = k_ac * p_x + b_ac C+0BV~7J<<  
        End Select j^D/,SW  
      rt(1) = p_x T8Ye+eP}  
      rt(2) = p_y o'ZW  
     D\ P-|}  
'计算最大半径 -_

f-j  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 2K2_
-  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) >n5Kz]]
%  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 7/bF04~%  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) '3B7F5uLx"  
Dim bb(5) As Single FwDEYG  
  bb(1) = rr1 ,DCrhk
 
  bb(2) = rr2 z[0t%]7l  
  bb(3) = rr3 MYUL y2)  
  bb(4) = rr4 `'ak/%Krh  
  nb = rr1 >"D0vj  
For i = 1 To 4 SKJ'6*6  
    If nb <= bb(i) Then G4"[ynlWV  
       nb = bb(i) qO>A
6  
    End If oi%IHX(`  
Next i (o!i9)  
    rt(0) = Sqr(nb) &usum~@  
    rr = rt() f4^\iZ{`G  
  End If _p%@x:\  
         r?WOum  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  be~'}`>  

q%k _C0  
有热压工艺方面的人才或者资料分享下； s%t =*+L\  
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 3+iQct[  

高手真多！

楼主威武霸气.