[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： GYwU3`{  
T1#r>3c\  
|Q?^Ba  

关键点说几个： MUn(ZnQy|  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） *WaqNMD[%  
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 Ake@krh>$  
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 gE: ?C2  

以下是几个重要的函数： KX J7
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1.判断点在区域中函数 T>68 ,; p  
2.计算夹角函数
#/Bg5:  
3.转置函数 EK
us0"|  
4.得到区域中心点，及区域半径函数 :g~_  
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） @;\0cEn>  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 k/(]1QnW  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single <
RKT |  
   cax = x2 - x1 df!i}L  
   cay = y2 - y1 flT6y-d  
   cbx = x2 - x3 uP+VS>b  
   cby = y2 - y3 d6W\ \6V  
   mo_jj = cax * cbx + cay * cby U*b7 Pxq;  
   mo_ca = Sqr(cax * cax + cay * cay) jD${ZIv  
   mo_cb = Sqr(cbx * cbx + cby * cby) \<ysJgqUG  
   cos_acb = mo_jj / (mo_ca * mo_cb) |kP utB  
   'ff_cos = cos_acb P?S]Q19Q4  
   If cos_acb >= 1 Then C]p@7"l  
   nn = 0 -n8d#Qm)  
   ElseIf cos_acb <= -1 Then oC-v>&bW  
   nn = 3.14159265258979 j+@3.^vK
 
   Else uFh
aN\S  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) )U
=]HpuzI  
   End If !I.}[9N  
   'ff_angle = nn Ptf(p`  
   ff_angle = nn * 180 / 3.14159265258979 rtfRA<  
End Function

'判断点在区域内函数 s M*ay,v;  
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 Px&_6}Y
Wy  
Dim aob, boc, cod, doa, sum As Single N!Rt040.%  
  If ppx = p1x And ppy = p1y Then }zx ~  
     point_in = True a]T&-#c,}  
     Exit Function -rn6ZSD)  
  End If ddyX+.LMk  
  If ppx = p2x And ppy = p2y Then Xh>($ U  
     point_in = True 5|nc^ 12  
     Exit Function r4fHD~#l{  
  End If P.qzP/Ny  
   If ppx = p3x And ppy = p3y Then #K6cBfqI  
     point_in = True P/dnH  
     Exit Function 8'HS$J;C  
  End If F,{mF2U*$  
     o$buoGSPc  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) &'x~<rx  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Ff%V1BH[  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) avL_>7q
 
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) i*Ldec^  
    sum = aob + boc + cod + doa 4]uj+J  
    If 360.01 > sum And sum > 359.99 Then uTxa5j  
       point_in = True /rnI"ze`  
    Else kB> ~Tb0  
       point_in = False {VE h@yn  
    End If Cq"KKuf  
End Function

'得到点半径,得到交点坐标函数 &~ y)b`r  
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()  ir6' \  
    '求得中心点坐标 )O
DF6Ag  
Dim tt As String rNii,_  
Dim rt(3) As Single x8PT+KC  
    '判断是否平行
3KkfQ{  
   acx = p3x - p1x "y,YC M`  
   acy = p3y - p1y 3}0\W.jH  
   bdx = p4x - p2x ~,b^f{7`!  
   bdy = p4y - p2y .p&@;fZ  
   If acx * bdy = acy * bdx Then ~ELMLwn.  
      rt(0) = 0 'J|)4OG:  
      Exit Function %w*)7@,+-  
   Else !Qe;oMqy}  
      '判断斜率存在否 l%0bF9\  
      If p1x = p3x And p2x <> p4x Then jO-?t9^  
         tt = "ac_n_bd_y" h'):
/}JPl  
      ElseIf p1x <> p3x And p2x = p4x Then /
x6p  
         tt = "ac_y_bd_n" 6lSz/V;  
      ElseIf p1x <> p3x And p2x <> p4x Then wZ
iUzS;v  
         tt = "ac_y_bd_y" ;Y$>WKsV  
      End If  5&&4-  
    Select Case tt xzOa9w/  
         Case "ac_n_bd_y" (+> 2&@@<  
            'bd线段方程 ~#A}=,4>  
            k_bd = bdy / bdx xH-d<Ht,7  
            b_bd = p2y - k_bd * p2x {r,Uik-nL  
            p_x = p1x {ALEK  
            p_y = k_bd * p_x + b_bd u0q$`9J  
         Case "ac_y_bd_n" <v:V
A!]  
            'ac线段方程 Cbw *?9d  
            k_ac = acy / acx I,j4 BU4  
            b_ac = p1y - k_ac * p1x 5i!Q55Yv=,  
            p_x = p2x WQK<z!W5  
            p_y = k_ac * p_x + b_ac $KiCs]I+  
        Case "ac_y_bd_y" $YL9 vJV  
           'ac，bd线段都要求 ~~tTr$  
           k_ac = acy / acx ~t`^|cr|  
           b_ac = p1y - k_ac * p1x L
L^KZ-  
           k_bd = bdy / bdx 5p;AON  
           b_bd = p2y - k_bd * p2x SS=<\q#MS  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 4Gc M  
           p_y = k_ac * p_x + b_ac 1i76u!{U  
        End Select 9%/hoA)  
      rt(1) = p_x 9y7N}T6  
      rt(2) = p_y
ze+YQF  
     CLR1CGnn7  
'计算最大半径 &L;ocd$  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) =)[m[@,c  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) (vs<Fo|]  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y)
-8TJ:#|N  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) %tCv-aX4  
Dim bb(5) As Single Bt+^H6cb  
  bb(1) = rr1 r
bw$=bX}  
  bb(2) = rr2 -+#%]P8l  
  bb(3) = rr3 6>>; fy2  
  bb(4) = rr4 Dyov}
y  
  nb = rr1 :xh{SsW@  
For i = 1 To 4 [{znwK@  
    If nb <= bb(i) Then w?Te%/s.  
       nb = bb(i) )pB#7aEw  
    End If diq}\'f  
Next i f98,2I(>`+  
    rt(0) = Sqr(nb) T
lqHj  
    rr = rt() SK<R
k  
  End If gq+SM i=  
         =kjKK
  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  OO:S2-]Y>e  

Od1\$\4Z  
有热压工艺方面的人才或者资料分享下； 6$u/
N gS  
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 {u'szO}k  

高手真多！

楼主威武霸气.