[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： tN<X3$aN  
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关键点说几个： sJKr%2nVV  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） f2[R2sto@  
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 XfE0P(sE  
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 /69yR  

以下是几个重要的函数： (=uT*Cb  
1.判断点在区域中函数 2Snb+,o2  
2.计算夹角函数 Jy/< {7j  
3.转置函数 @*|VWHR  
4.得到区域中心点，及区域半径函数 9V1d`]tP  
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） <qfAW?tF  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ya1 aWs~  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single OY}FtGy  
   cax = x2 - x1 X PyDZk/m  
   cay = y2 - y1 mP\V.^  
   cbx = x2 - x3 by'KJxl[  
   cby = y2 - y3 ss%,  
   mo_jj = cax * cbx + cay * cby V3ht:>c9qs  
   mo_ca = Sqr(cax * cax + cay * cay) }P?e31@:  
   mo_cb = Sqr(cbx * cbx + cby * cby) "7y,d%H  
   cos_acb = mo_jj / (mo_ca * mo_cb) %\ i&g$  
   'ff_cos = cos_acb
]UUa/ep
-  
   If cos_acb >= 1 Then ]O@iT= *3  
   nn = 0 OM0r*<D"!  
   ElseIf cos_acb <= -1 Then avq$aq(3&  
   nn = 3.14159265258979 hUi@T}aA|  
   Else "6\5eFN;  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 9no<;1+j,  
   End If pM@
8T25=  
   'ff_angle = nn N-QS/*C
.~  
   ff_angle = nn * 180 / 3.14159265258979 Zpg;hj5_  
End Function

'判断点在区域内函数 ?d3K:|g  
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 +]cf/_8+s  
Dim aob, boc, cod, doa, sum As Single xg/(  
  If ppx = p1x And ppy = p1y Then 4&cQW)  
     point_in = True pL1ABvBB  
     Exit Function 9k ~8n9
  
  End If 5NZuaN  
  If ppx = p2x And ppy = p2y Then c ^ds|7i]a  
     point_in = True ^g*Sy, A  
     Exit Function < 8' b  
  End If /al56n  
   If ppx = p3x And ppy = p3y Then l%2VA  
     point_in = True pF8$83S  
     Exit Function a6n@   
  End If 5kw  K%  
     d[9{&YnH !  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) &Tt7VYJfIV  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) YCiG~y/~  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) cEu_p2(7!B  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) U!q2bF<@  
    sum = aob + boc + cod + doa (.P}>$M9  
    If 360.01 > sum And sum > 359.99 Then (G>su  
       point_in = True \JM6zR^Ef  
    Else e2c'Wab  
       point_in = False ]|g2V a~-  
    End If jdG2u p  
End Function

'得到点半径,得到交点坐标函数 )8oyo~4?  
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() 8J'5%$3u  
    '求得中心点坐标 >P j#?j*Y  
Dim tt As String 1R8tR#l  
Dim rt(3) As Single $V3If  
    '判断是否平行 A[m?^vk q  
   acx = p3x - p1x sC\?{B0r  
   acy = p3y - p1y C'[4jz0xF  
   bdx = p4x - p2x vxPE=!|  
   bdy = p4y - p2y (9]1p;  
   If acx * bdy = acy * bdx Then _DSDY$Ec  
      rt(0) = 0 LA
c60^t1  
      Exit Function %T
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   Else xMk>r1Ud  
      '判断斜率存在否 +!u9_?Tp  
      If p1x = p3x And p2x <> p4x Then [xM&Jdf8  
         tt = "ac_n_bd_y" wp}Q4I
  
      ElseIf p1x <> p3x And p2x = p4x Then `/T.u&QF  
         tt = "ac_y_bd_n" +ZjDTTk  
      ElseIf p1x <> p3x And p2x <> p4x Then t+A*Ws*o  
         tt = "ac_y_bd_y" q0%QMut%  
      End If m&=Dy5  
    Select Case tt I@m(}  
         Case "ac_n_bd_y" Z#u{th  
            'bd线段方程 Ec<33i]h*p  
            k_bd = bdy / bdx vGsAM*vw6  
            b_bd = p2y - k_bd * p2x | t:UpP  
            p_x = p1x FFZ?-sE  
            p_y = k_bd * p_x + b_bd n#"G)+h3#  
         Case "ac_y_bd_n" [@qjy*5p  
            'ac线段方程 0Md.3
kY  
            k_ac = acy / acx u^SInanw  
            b_ac = p1y - k_ac * p1x [gUD +  
            p_x = p2x Sm {Sq  
            p_y = k_ac * p_x + b_ac 5GAW3j{  
        Case "ac_y_bd_y" -l}"DP _  
           'ac，bd线段都要求 O+mEE>:w%  
           k_ac = acy / acx TqN@l\  
           b_ac = p1y - k_ac * p1x jl}9R]Y_2  
           k_bd = bdy / bdx IY.M#Q]  
           b_bd = p2y - k_bd * p2x lPz`?Hn  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) }8 ;,2E*z  
           p_y = k_ac * p_x + b_ac "a;$uW@.6  
        End Select =),ZZD#J  
      rt(1) = p_x .7 j#F  
      rt(2) = p_y 7)D[}UXz  
     rhOxyY0  
'计算最大半径 @>VX]Qe^X  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 3-{WFnA  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) p&\QkI=  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Heqr1btK  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) sE]z.Po=  
Dim bb(5) As Single O=}  
  bb(1) = rr1 <z60EvHg  
  bb(2) = rr2 3BK 8{/  
  bb(3) = rr3 m==DBh  
  bb(4) = rr4 JO]?u(m01  
  nb = rr1 _t]Q*i0p  
For i = 1 To 4 _T.`+0UV  
    If nb <= bb(i) Then *eXs7"H  
       nb = bb(i) XjzGtZ#6  
    End If PfYeV/M|  
Next i q@S\R 7R  
    rt(0) = Sqr(nb) p);[;S  
    rr = rt() }t(5n$go6  
  End If bRFZ:hu l  
         J s33S)  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  SrWmV@"y  

5C-n"8&C&  
有热压工艺方面的人才或者资料分享下； Rh@UxNy\,  
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 ZQ\O| n8  

高手真多！

楼主威武霸气.