[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： ivagS\Q  
Vm.u3KE  

描述:请输入描述

图片:2.jpg

J-QQ!qa0  

关键点说几个： %-*vlNC)  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 1uH\Bn]p?  
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 YVaQ3o|!  
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 ^twv0>vEo  

以下是几个重要的函数： ^GAdl
}  
1.判断点在区域中函数 !'gz&3B~h  
2.计算夹角函数 _F*w ,b$8  
3.转置函数 ,G:4H%?  
4.得到区域中心点，及区域半径函数 TZP{=v<
 
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） N1Z8I:  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 StDmJ]  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single < t (Pw  
   cax = x2 - x1 A{J1 n  
   cay = y2 - y1 vedMzef[@>  
   cbx = x2 - x3 (XwLKkw0n  
   cby = y2 - y3 7gMtnwT  
   mo_jj = cax * cbx + cay * cby <D dHP  
   mo_ca = Sqr(cax * cax + cay * cay) YJ^ lM\/<  
   mo_cb = Sqr(cbx * cbx + cby * cby) OT&E
)eR  
   cos_acb = mo_jj / (mo_ca * mo_cb) G}-.
xj]  
   'ff_cos = cos_acb t(Zs*c(  
   If cos_acb >= 1 Then Uaj=}p\+.p  
   nn = 0 '*XNgvX  
   ElseIf cos_acb <= -1 Then )c'>E4>  
   nn = 3.14159265258979 0;h1LI)  
   Else tN{t-xUgk  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) eE{L>u  
   End If f0`' i[  
   'ff_angle = nn xs I/DW  
   ff_angle = nn * 180 / 3.14159265258979 QP[a^5;Tt  
End Function

'判断点在区域内函数 {&#~t4  
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 .G_3blE;  
Dim aob, boc, cod, doa, sum As Single ow_y  
  If ppx = p1x And ppy = p1y Then p}A4K#G  
     point_in = True M91lV(Z   
     Exit Function unnx#e]  
  End If Hm VTfH'  
  If ppx = p2x And ppy = p2y Then ]kkBgjQbS  
     point_in = True ~{vdP=/WP  
     Exit Function -?nT mzRc  
  End If ING_:XpnJ  
   If ppx = p3x And ppy = p3y Then =_=Z;#`cXk  
     point_in = True 06^1#M$'  
     Exit Function bez'[Y{  
  End If a9Fm Y`  
     pRwGv  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 3EVC8ue  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) (bx\4Ws  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) aoDD&JE  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) <i'u96  
    sum = aob + boc + cod + doa "q^#39i?  
    If 360.01 > sum And sum > 359.99 Then r^A#[-VyNP  
       point_in = True ;(Xe@OtW  
    Else .W :  
       point_in = False 9J7J/]7f  
    End If NVJ&C]H6  
End Function

'得到点半径,得到交点坐标函数 4`6c28K0?  
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() 43>9)
t  
    '求得中心点坐标 +^*5${g;@H  
Dim tt As String {@V3?pG?p  
Dim rt(3) As Single )@,90Vhh  
    '判断是否平行 t@(9ga(  
   acx = p3x - p1x 9Yl8ndP^E  
   acy = p3y - p1y 30?LsYXL62  
   bdx = p4x - p2x  @yt2_  
   bdy = p4y - p2y R6!cK[e]4  
   If acx * bdy = acy * bdx Then K3rBl!7v  
      rt(0) = 0 ^m_^  
      Exit Function VyWYfPK  
   Else nuSN)}b<Q  
      '判断斜率存在否 eA?uny f2r  
      If p1x = p3x And p2x <> p4x Then =_RcoG/^~  
         tt = "ac_n_bd_y" Jq$_=X&  
      ElseIf p1x <> p3x And p2x = p4x Then z!s.9  
         tt = "ac_y_bd_n" 7G.o@p6$  
      ElseIf p1x <> p3x And p2x <> p4x Then DB`$Ru@  
         tt = "ac_y_bd_y" [0u.}c;(  
      End If 3vdu;W=Sz  
    Select Case tt >gk z4.*  
         Case "ac_n_bd_y" Dxt),4%P  
            'bd线段方程 ;8*XOC;[  
            k_bd = bdy / bdx ,-(T"Ph<  
            b_bd = p2y - k_bd * p2x O3kg  
            p_x = p1x _F`$ d2  
            p_y = k_bd * p_x + b_bd RpO@pd m  
         Case "ac_y_bd_n" Z5G]p4  
            'ac线段方程 B;Xoa,  
            k_ac = acy / acx &yxNvyA[u  
            b_ac = p1y - k_ac * p1x <NG/i i=  
            p_x = p2x q=6Cc9FN  
            p_y = k_ac * p_x + b_ac p)B33ZzC  
        Case "ac_y_bd_y" I@0z/4H``  
           'ac，bd线段都要求 YV/>8*i  
           k_ac = acy / acx DX
}B0B  
           b_ac = p1y - k_ac * p1x L*g. 6+2  
           k_bd = bdy / bdx :}y9$p  
           b_bd = p2y - k_bd * p2x `$s)X$W?  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) gq'>6vOj  
           p_y = k_ac * p_x + b_ac /?KtXV>]  
        End Select pOC% oj  
      rt(1) = p_x Y5dD|]F|  
      rt(2) = p_y G2.|fp_}pG  
     +|y*
}bG  
'计算最大半径 d<Ggw#}:m  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 0A;"V'i  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) AV40:y\RW  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) }]AT _bh,  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 'X =p7 d|'  
Dim bb(5) As Single P$Z}  
  bb(1) = rr1 {5^K Xj$B  
  bb(2) = rr2 !z11" c  
  bb(3) = rr3 C5P$&s\  
  bb(4) = rr4 ^SZw`]  
  nb = rr1 L0rip5[;d  
For i = 1 To 4 +R-h ,$\=7  
    If nb <= bb(i) Then u!Xb?:3uj  
       nb = bb(i) ~C&*.ZR  
    End If aaDP9FW9e  
Next i '|A|vCRCG  
    rt(0) = Sqr(nb) Hd9XfU  
    rr = rt() ^ eQFg>  
  End If F{<5aLaYti  
         ? ^M /[@  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  %c|UmKKi  

=w$tvo/  
有热压工艺方面的人才或者资料分享下； POAw M  
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!(@q!>G  

高手真多！

楼主威武霸气.