[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： =&$z Nc4h  
dgoAaS2M  
t(uvc{K*  

关键点说几个： B#jnM~fJz  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 3,{eH6,O7M  
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 O=RS</01!  
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 j_N<aX  

以下是几个重要的函数： 8e*skL  
1.判断点在区域中函数 h' !C  
2.计算夹角函数 rBTg"^jsw  
3.转置函数 6Qt(Yu*s  
4.得到区域中心点，及区域半径函数 |di(hY|  
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） .F 6US<]  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 9,INyEyAL  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single vu*e*b$}  
   cax = x2 - x1 x:MwM?  
   cay = y2 - y1 5:IDl1f5  
   cbx = x2 - x3 F%|P#CaB  
   cby = y2 - y3 *zrGrk:l  
   mo_jj = cax * cbx + cay * cby 8>eYM  
   mo_ca = Sqr(cax * cax + cay * cay) HfVHjF)  
   mo_cb = Sqr(cbx * cbx + cby * cby) @Z ==B%`  
   cos_acb = mo_jj / (mo_ca * mo_cb) 9m)$^U>oz  
   'ff_cos = cos_acb wBXa;.  
   If cos_acb >= 1 Then A4,{ep'Z!  
   nn = 0 ;^xM" {G8  
   ElseIf cos_acb <= -1 Then zK5&,/  
   nn = 3.14159265258979 ?;CIS$$r  
   Else V ,p~,rC  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ):G%o  
   End If Hh^ "c}  
   'ff_angle = nn 1,+<|c)T?  
   ff_angle = nn * 180 / 3.14159265258979 ^^"zjl*^  
End Function

'判断点在区域内函数 =l43RawAmu  
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 yk8b>.Y\A  
Dim aob, boc, cod, doa, sum As Single ) 1AAL0F\B  
  If ppx = p1x And ppy = p1y Then #!F>cez  
     point_in = True 'z8FU~oU  
     Exit Function MTtx|L\4  
  End If O.B9w+G=  
  If ppx = p2x And ppy = p2y Then 66pjWS {X  
     point_in = True \PxT47[@e  
     Exit Function JW[6 ^Rw  
  End If Q<V(#)*  
   If ppx = p3x And ppy = p3y Then v=@y7P1  
     point_in = True \lQ3j8U  
     Exit Function !ddyJJ^a  
  End If 3UUdJh<~  
     VG 5*17nf5  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) rgVRF44X{  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 3T
u]-.  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) `CVkjLiy  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) /Ot3[B  
    sum = aob + boc + cod + doa =\.*CY|;N  
    If 360.01 > sum And sum > 359.99 Then b~vV++ou_  
       point_in = True _ACN  
    Else .3C::~:  
       point_in = False 4tCM2it%  
    End If }8 z:L<  
End Function

'得到点半径,得到交点坐标函数 <Ja&z M  
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() eI:[o  
    '求得中心点坐标 [<53_2]~  
Dim tt As String {ze69 h  
Dim rt(3) As Single K2Abu?  
    '判断是否平行 `w 6Qsah  
   acx = p3x - p1x jM$bWtq2  
   acy = p3y - p1y "/6#Z>y  
   bdx = p4x - p2x >}*W$i  
   bdy = p4y - p2y lV^#[%  
   If acx * bdy = acy * bdx Then b5|*p(7[  
      rt(0) = 0 D-/6RVq0m  
      Exit Function N] sbI)Z@  
   Else 7=Muq]j2  
      '判断斜率存在否 -E|"?  
      If p1x = p3x And p2x <> p4x Then }eVDe(7_  
         tt = "ac_n_bd_y" /#Pm'i>B  
      ElseIf p1x <> p3x And p2x = p4x Then 89:nF#  
         tt = "ac_y_bd_n" X6 BIZ  
      ElseIf p1x <> p3x And p2x <> p4x Then -]0:FKW  
         tt = "ac_y_bd_y" 67rY+u%  
      End If "v:k5a(  
    Select Case tt U*a#{C7"  
         Case "ac_n_bd_y" \
]<R`YMV  
            'bd线段方程 bpBn3f`?*  
            k_bd = bdy / bdx tAN!LI+w  
            b_bd = p2y - k_bd * p2x eWDXV-xD
 
            p_x = p1x Zeg'\&w0s  
            p_y = k_bd * p_x + b_bd J-<P~9m~I  
         Case "ac_y_bd_n" +zMhA p  
            'ac线段方程 8~O#@hB~3  
            k_ac = acy / acx Trs~KcsD  
            b_ac = p1y - k_ac * p1x 6HCg<_j]  
            p_x = p2x g*b`o87PI  
            p_y = k_ac * p_x + b_ac tlQ6>v'  
        Case "ac_y_bd_y" q.=Q
 
           'ac，bd线段都要求 W\>O$IX^e  
           k_ac = acy / acx tM"vIz 05  
           b_ac = p1y - k_ac * p1x /}@F q  
           k_bd = bdy / bdx ]z'L1vQl7  
           b_bd = p2y - k_bd * p2x #|E#Rkw!  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) qR cSB  
           p_y = k_ac * p_x + b_ac k4$zM/ob  
        End Select :0y-n.-{  
      rt(1) = p_x FL\pgbI  
      rt(2) = p_y n@+?tYk*e  
     sX6\AYF1M  
'计算最大半径 b<y*:(:  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) qe&|6M!  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) E}4{{{r  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) P-ZvW<M  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) }T.>p#z  
Dim bb(5) As Single E?+~S M1~  
  bb(1) = rr1 liYsUmjZ=  
  bb(2) = rr2 =i
W hK~S  
  bb(3) = rr3 ^*l dsc  
  bb(4) = rr4 \9,lMK[b  
  nb = rr1 a.<XJ\  
For i = 1 To 4 75H!i$(*+  
    If nb <= bb(i) Then --y,ky#  
       nb = bb(i) -I{op wd  
    End If ?jMM@O`Nu  
Next i lB _9b_|2  
    rt(0) = Sqr(nb) CL2zZk{u_  
    rr = rt() di_UJ~  
  End If ~Zsj@d  
         o%+w:u.  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  \SmYxdU'>  

vEt=enQ  
有热压工艺方面的人才或者资料分享下； N^`S'FVA  
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 _c11#  

高手真多！

楼主威武霸气.