[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： gE(QVbh(  
hf0G-r_ow  
[ivz/r(Rj  

关键点说几个： hE-`N,i}  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） -w=rNlj  
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 ##BMh!  
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 PHi'&)|  

以下是几个重要的函数： 5|x&Z/hL  
1.判断点在区域中函数 >k*QkIyq  
2.计算夹角函数 f[.RAHjk  
3.转置函数 6g29!F`y  
4.得到区域中心点，及区域半径函数 DUEA"m h  
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） pK1P-!c  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 3ypB~bNw  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Y<:%_]]  
   cax = x2 - x1 dwv xV$Nt  
   cay = y2 - y1 &E.0!BuqV  
   cbx = x2 - x3 fU!C:  
   cby = y2 - y3 VvSD&r^qI  
   mo_jj = cax * cbx + cay * cby KArf:d  
   mo_ca = Sqr(cax * cax + cay * cay) J*U,kyYF  
   mo_cb = Sqr(cbx * cbx + cby * cby) 3%{XJV  
   cos_acb = mo_jj / (mo_ca * mo_cb) }h5pM`|1  
   'ff_cos = cos_acb zOLt)2-<  
   If cos_acb >= 1 Then PDREwBX  
   nn = 0 /XEcA5C<  
   ElseIf cos_acb <= -1 Then W>K2d  
   nn = 3.14159265258979 Cq !VMl>hP  
   Else 6|X  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) $n(?oyf  
   End If ~bL(mq  
   'ff_angle = nn =R:3J"ly0  
   ff_angle = nn * 180 / 3.14159265258979 "^;'.~@e8  
End Function

'判断点在区域内函数 ~d/Doi  
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 dZ9[wkn  
Dim aob, boc, cod, doa, sum As Single ([_ls8  
  If ppx = p1x And ppy = p1y Then zc'!a"  
     point_in = True *oY59Yf  
     Exit Function 2[[pd&MJZ  
  End If Z7JI4"  
  If ppx = p2x And ppy = p2y Then f6PXcV   
     point_in = True q!7z4Cn  
     Exit Function 5Jp@n .  
  End If 8~ .r/!wfy  
   If ppx = p3x And ppy = p3y Then IxYuJpi  
     point_in = True R5X<8(4p  
     Exit Function r,2x?Qi  
  End If sw'20I  
     N
j %!N  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) nFzhj%Pt;  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) y,DK@X  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) LZ|G"5X[  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) .Ig`v  
    sum = aob + boc + cod + doa U.crRrN  
    If 360.01 > sum And sum > 359.99 Then Fq&@dxN3  
       point_in = True 4Mi*bN,  
    Else o83HR[
 
       point_in = False @0A0\2  
    End If rxI?|}4  
End Function

'得到点半径,得到交点坐标函数 JR$Dp&]I  
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() k^C;"awh  
    '求得中心点坐标 }qmZ  
Dim tt As String [\V]tpl!  
Dim rt(3) As Single bV@53_)N2  
    '判断是否平行 cI?dvfU?  
   acx = p3x - p1x Q6MDhv,  
   acy = p3y - p1y W7l/{a @  
   bdx = p4x - p2x 2OAh7'8<  
   bdy = p4y - p2y _:c8YJEG{  
   If acx * bdy = acy * bdx Then wI #_r_  
      rt(0) = 0 9C-F%te7  
      Exit Function @xtcjB9  
   Else Vhz?9i6|g^  
      '判断斜率存在否 VpWax]'  
      If p1x = p3x And p2x <> p4x Then $Z+N*w~8  
         tt = "ac_n_bd_y" WyA>OB<Zeq  
      ElseIf p1x <> p3x And p2x = p4x Then ^+mSf`5  
         tt = "ac_y_bd_n" zXbTpm  
      ElseIf p1x <> p3x And p2x <> p4x Then @gE +T37x2  
         tt = "ac_y_bd_y" h[C!cX  
      End If ^-4mZXAy1|  
    Select Case tt +m:U9K(\h  
         Case "ac_n_bd_y" .2.$Rq  
            'bd线段方程 (
4$lB{%  
            k_bd = bdy / bdx V>gEF'g  
            b_bd = p2y - k_bd * p2x fk*JoR.o  
            p_x = p1x I?4J69'  
            p_y = k_bd * p_x + b_bd JI3AR e?y  
         Case "ac_y_bd_n" %Q1v8l.}  
            'ac线段方程 lLmVat(  
            k_ac = acy / acx 7xwS .|
 
            b_ac = p1y - k_ac * p1x 1^}()H62}  
            p_x = p2x 6\\B{%3R2  
            p_y = k_ac * p_x + b_ac 9 ?MOeOV8  
        Case "ac_y_bd_y" H#m)`=nZSZ  
           'ac，bd线段都要求 qq[2h~6
P]  
           k_ac = acy / acx E0ud<'3<  
           b_ac = p1y - k_ac * p1x udp&U+L  
           k_bd = bdy / bdx >]T(}S~  
           b_bd = p2y - k_bd * p2x /'TzHO9_`  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ~<Gs<c}z  
           p_y = k_ac * p_x + b_ac gLl?e8[F  
        End Select g}ciG!0  
      rt(1) = p_x q&jZmr  
      rt(2) = p_y D<L]'  
     xb8fV*RO8A  
'计算最大半径 #mk#&i3"k  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) +**H7: bO  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 0Hff/~J  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) !ye%A&  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ;L(W'+  
Dim bb(5) As Single nP 2rN_:4  
  bb(1) = rr1 >^|\wy  
  bb(2) = rr2 6}C4 SZ  
  bb(3) = rr3 Eqp?cKrji  
  bb(4) = rr4 ?tqTG2!(  
  nb = rr1 x"8(j8e  
For i = 1 To 4 v{Zh!mk* L  
    If nb <= bb(i) Then |WXu;uf$.u  
       nb = bb(i) 87~. |nu  
    End If #Sb1oLC  
Next i Haj`mc!<D0  
    rt(0) = Sqr(nb) ppb]RN|)  
    rr = rt() <~"qz*_  
  End If fAUtqkB  
         zclt2?  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  1MfRFv  

[gIStKe  
有热压工艺方面的人才或者资料分享下； t!D=oBCro  
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 mQVduG  

高手真多！

楼主威武霸气.