[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： 8${Yu  
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图片:2.jpg

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关键点说几个： BLvI[b|3gn  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） K9J"Q4pEC  
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 mzX <!  
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 V^U1o[`  

以下是几个重要的函数： >Lo!8Hen  
1.判断点在区域中函数 Yv`8{
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2.计算夹角函数 "k${5wk#Fl  
3.转置函数 !j3V'XU#Zn  
4.得到区域中心点，及区域半径函数 dLSnhZ  
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） R "&(Ae?LR  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 4nh
e *ip  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single sJlX]\RLQ  
   cax = x2 - x1 toipEp<ci  
   cay = y2 - y1 / -=(51}E  
   cbx = x2 - x3 Zw5\{Z0  
   cby = y2 - y3 n(Up?_  
   mo_jj = cax * cbx + cay * cby T$]2U>=<J  
   mo_ca = Sqr(cax * cax + cay * cay) ~PNO|]8j  
   mo_cb = Sqr(cbx * cbx + cby * cby) X*~NE\  
   cos_acb = mo_jj / (mo_ca * mo_cb)  :*M\z3`k  
   'ff_cos = cos_acb ]kmOX  
   If cos_acb >= 1 Then /s%I(iP4  
   nn = 0 0;)6ZU  
   ElseIf cos_acb <= -1 Then /S;o2\  
   nn = 3.14159265258979 (%>Sln5hq  
   Else xLZQ\2q  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) \QUvImT  
   End If ED/-,>[f  
   'ff_angle = nn %uGA+ \b  
   ff_angle = nn * 180 / 3.14159265258979 !v2,lH  
End Function

'判断点在区域内函数 T , =ga  
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 2al~`  
Dim aob, boc, cod, doa, sum As Single 3i(k6)H$4  
  If ppx = p1x And ppy = p1y Then ~~1~_0?e  
     point_in = True
*vhm  
     Exit Function n@L!{zY  
  End If U>;itHW/  
  If ppx = p2x And ppy = p2y Then !E_uQ?/w]Z  
     point_in = True l``1^&K  
     Exit Function ):78GVp  
  End If nu0bJ:0aLd  
   If ppx = p3x And ppy = p3y Then 6sy%KO*A  
     point_in = True [/uKo13  
     Exit Function :e
@JESlLf  
  End If ;(0:6P8I  
    
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    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) M]` Q4\  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Dlj=$25  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) W,{`)NWg  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) H5RHA^p|  
    sum = aob + boc + cod + doa 'v|2}T*  
    If 360.01 > sum And sum > 359.99 Then 6 qKIz{;  
       point_in = True 0v7;ZxD  
    Else 4_.k Q"'DH  
       point_in = False 3n:<oOV  
    End If CJKH"'u3^  
End Function

'得到点半径,得到交点坐标函数 6$6NVq  
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() 1UM]$$:i  
    '求得中心点坐标 *Ra")(RnDK  
Dim tt As String  iz^wBQ  
Dim rt(3) As Single 78QFaN$  
    '判断是否平行 g?$9~/h :;  
   acx = p3x - p1x ONGe/CEXT  
   acy = p3y - p1y x b0
+4w|  
   bdx = p4x - p2x =hs@W)-O  
   bdy = p4y - p2y =h_gj >  
   If acx * bdy = acy * bdx Then YqJIp. Z  
      rt(0) = 0 %|,<\~P  
      Exit Function <@vE3v;  
   Else \QM
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      '判断斜率存在否 0&nF Vsz  
      If p1x = p3x And p2x <> p4x Then UUU^Y
T \  
         tt = "ac_n_bd_y"  yY| .  
      ElseIf p1x <> p3x And p2x = p4x Then o7T|w~F~R  
         tt = "ac_y_bd_n" V[xy9L[#  
      ElseIf p1x <> p3x And p2x <> p4x Then /*O,T  
         tt = "ac_y_bd_y" !>:tF,fcB  
      End If .-|O"H$  
    Select Case tt a,4g`?  
         Case "ac_n_bd_y" Ur-^X(nL  
            'bd线段方程 V0AX1?H~w  
            k_bd = bdy / bdx m5p~>]}fYF  
            b_bd = p2y - k_bd * p2x eLYFd,?9  
            p_x = p1x *=7[Ip<X  
            p_y = k_bd * p_x + b_bd %xfy\of+Nk  
         Case "ac_y_bd_n" `?@7 KEl>  
            'ac线段方程 W^N"y&  
            k_ac = acy / acx piG1&*  
            b_ac = p1y - k_ac * p1x <M7*N.  
            p_x = p2x `l+SJLyJ%  
            p_y = k_ac * p_x + b_ac 0\#Q;Z2  
        Case "ac_y_bd_y" z )pV$  
           'ac，bd线段都要求 "XY?v8*c  
           k_ac = acy / acx 9>#|~P&FE  
           b_ac = p1y - k_ac * p1x |i`@!NrFL  
           k_bd = bdy / bdx _Nn!S
E  
           b_bd = p2y - k_bd * p2x 84[^#ke  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) *YtNt5u  
           p_y = k_ac * p_x + b_ac uf^:3{1  
        End Select DsX>xzM  
      rt(1) = p_x }m H>lN  
      rt(2) = p_y YzZF^q^I  
     oSl>%}  
'计算最大半径 cMl

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   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) jyGVbno
`  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) t4IJ%#22  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) x]ti3?w  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 6\3k0z  
Dim bb(5) As Single 4cQ5E9  
  bb(1) = rr1 QB[s8"S  
  bb(2) = rr2 9^ r  
  bb(3) = rr3 Ng"vBycy  
  bb(4) = rr4 &XsLp&Do2  
  nb = rr1 QVW6S
Y  
For i = 1 To 4 ^PQV3\N  
    If nb <= bb(i) Then #FB>}:L{h*  
       nb = bb(i) W\,lII0  
    End If 0'hxw3#  
Next i ^JtHTLH
L=  
    rt(0) = Sqr(nb) s.sy7%{  
    rr = rt() XX-T"
,  
  End If ]uvbQ.l_t  
         #'x?)AS  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ws2j:B  

a-A+.7  
有热压工艺方面的人才或者资料分享下； D2%G.z  
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 qVD!/;l  

高手真多！

楼主威武霸气.