[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： tSDp>0yZ3  
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图片:2.jpg

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关键点说几个： Y@'1}=`J  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） tX*L_  
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 28+Sz>SP  
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 **YNR:#Y  

以下是几个重要的函数： qaGIU`}:$A  
1.判断点在区域中函数 E 0pF; P5  
2.计算夹角函数 't_=%^q  
3.转置函数 J2[QHr&tn  
4.得到区域中心点，及区域半径函数 O-2H!58$)  
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） 7<:w-  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 lM1!2d'P  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single xA5$!Oq7  
   cax = x2 - x1 1=a}{)0h  
   cay = y2 - y1 q |^O  
   cbx = x2 - x3 E\*",MGL  
   cby = y2 - y3 n1/lE)  
   mo_jj = cax * cbx + cay * cby E$>e< T  
   mo_ca = Sqr(cax * cax + cay * cay) $B?7u@>,  
   mo_cb = Sqr(cbx * cbx + cby * cby) r"[T9  
   cos_acb = mo_jj / (mo_ca * mo_cb) *&0Hz{|  
   'ff_cos = cos_acb +=k|(8Js#  
   If cos_acb >= 1 Then dJ^`9W  
   nn = 0 !m|%4/ M@  
   ElseIf cos_acb <= -1 Then w;$+7  
   nn = 3.14159265258979 ,h._iO)I^  
   Else dR+$7N$  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) WLl9>v^1  
   End If RHbp:Mlk  
   'ff_angle = nn !v L:P2  
   ff_angle = nn * 180 / 3.14159265258979 .Cus t  
End Function

'判断点在区域内函数 PWu2;JF  
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 r![JPhei  
Dim aob, boc, cod, doa, sum As Single 8Jj0-4]
 
  If ppx = p1x And ppy = p1y Then 8k^y.B  
     point_in = True u/c3omY"#  
     Exit Function ]/Qy1,  
  End If XSjelA?  
  If ppx = p2x And ppy = p2y Then 2] G$6H  
     point_in = True Wb)l8[=  
     Exit Function c|( ?  
  End If ;S`-9}6  
   If ppx = p3x And ppy = p3y Then yKEFne8^  
     point_in = True TeCpT2!5j  
     Exit Function qU*&49X  
  End If ;;hyjFGq%  
     zf>^2t*\  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) |;m`874  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y)  &Z!K]OSY  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) hUvuq,LH_  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) )NmlV99q  
    sum = aob + boc + cod + doa Ca@=s  
    If 360.01 > sum And sum > 359.99 Then 8{SU?MHQLE  
       point_in = True g+ 1=5g  
    Else ;GFB@I@  
       point_in = False !aw#',r8m  
    End If {hRie+  
End Function

'得到点半径,得到交点坐标函数 s w.AfRQP  
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() (ND5CKCR^  
    '求得中心点坐标 >PJtG]D  
Dim tt As String '`]n_$f'  
Dim rt(3) As Single 33<fN:J]f  
    '判断是否平行 Xm8Z+}i  
   acx = p3x - p1x C?60`^  
   acy = p3y - p1y A!ioji+{[  
   bdx = p4x - p2x ?VZ11?u  
   bdy = p4y - p2y C](z#c~c  
   If acx * bdy = acy * bdx Then _[TH@fO6:  
      rt(0) = 0 P('t6MVlT  
      Exit Function T1(j l)  
   Else VqD[G<|9T  
      '判断斜率存在否 ^$=tcoQG  
      If p1x = p3x And p2x <> p4x Then WjY{rM,K  
         tt = "ac_n_bd_y" \7,MZt  
      ElseIf p1x <> p3x And p2x = p4x Then r*6"'W>c6  
         tt = "ac_y_bd_n" >,>;)B@J  
      ElseIf p1x <> p3x And p2x <> p4x Then q}<.x8\  
         tt = "ac_y_bd_y" *|LbbRu  
      End If 0~+NB-L}  
    Select Case tt 1m>^{u  
         Case "ac_n_bd_y" Vl{~@G,@  
            'bd线段方程 GSz @rDGY  
            k_bd = bdy / bdx *?_qE  
            b_bd = p2y - k_bd * p2x QFW0KD`5  
            p_x = p1x Yzj%{fkh  
            p_y = k_bd * p_x + b_bd zBk_-'z  
         Case "ac_y_bd_n" b:P\=k]8#  
            'ac线段方程 JsmbW|t^  
            k_ac = acy / acx E tJ~dL)  
            b_ac = p1y - k_ac * p1x ]urK$  
            p_x = p2x Qm.z@DwFM{  
            p_y = k_ac * p_x + b_ac 5%<TF.;-J  
        Case "ac_y_bd_y" 29"mE;j  
           'ac，bd线段都要求 V~OUE]]Q  
           k_ac = acy / acx O6y @G .+  
           b_ac = p1y - k_ac * p1x {]&R8?%  
           k_bd = bdy / bdx [O=W>l  
           b_bd = p2y - k_bd * p2x :3*`IB !  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) MWBXs75I  
           p_y = k_ac * p_x + b_ac A)8rk_92Q  
        End Select R=`U4Ml;  
      rt(1) = p_x AK6=Ydu  
      rt(2) = p_y +x(YG(5\w  
     y:Z$LmPc<  
'计算最大半径 /sy-;JDnsu  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) $zdd=.!KiK  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ytEQ`  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) f[x~)=  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) a;%I\w;2  
Dim bb(5) As Single d>UnJ)V}  
  bb(1) = rr1 ,ohmc\*J  
  bb(2) = rr2 d$}&nV/A)  
  bb(3) = rr3 5\WUoSgy  
  bb(4) = rr4 \UOm]z  
  nb = rr1 W;qP=DK2  
For i = 1 To 4 -!l^]MU  
    If nb <= bb(i) Then :WVSJ,. !  
       nb = bb(i) 1t.R+1[c  
    End If vTdUuj3N  
Next i -OWZ6#v(  
    rt(0) = Sqr(nb) K!p,x;YX  
    rr = rt() $(3uOsy   
  End If rS
4%$p"  
         "e@n:N!  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  GLUUY0  

7lA:)a_!]  
有热压工艺方面的人才或者资料分享下； #ekM"p  
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 q>s`uFRg(  

高手真多！

楼主威武霸气.