[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： _u8d`7$*%  
??=7pFm  
Ozs&YZ  

关键点说几个： T'e p&tNY  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） /&G )IY]g  
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 pN7 v7rs  
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 XLsOn(U\&  

以下是几个重要的函数： .3,6Oo  
1.判断点在区域中函数 odC}RdN  
2.计算夹角函数 txXt<]N  
3.转置函数 dNgjM Q  
4.得到区域中心点，及区域半径函数 6i_dL|c  
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） LjMhPzCp  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 (YH/#n1"{  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single qb1[-H  
   cax = x2 - x1 y<A%&  
   cay = y2 - y1 bjYaJtn  
   cbx = x2 - x3 N
_),'2  
   cby = y2 - y3 <{UjO  
   mo_jj = cax * cbx + cay * cby W;@9x1jKX  
   mo_ca = Sqr(cax * cax + cay * cay) "/}cV5=Z  
   mo_cb = Sqr(cbx * cbx + cby * cby) eGh7,wngH  
   cos_acb = mo_jj / (mo_ca * mo_cb) auT
'ATW7i  
   'ff_cos = cos_acb .WT^L2l%  
   If cos_acb >= 1 Then Kk_h&by?  
   nn = 0 zS+_6s  
   ElseIf cos_acb <= -1 Then [.`%]Z(  
   nn = 3.14159265258979 sCE2 F_xjL  
   Else J,=: ]t  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) &b7i> ()  
   End If [Y=X^"PF  
   'ff_angle = nn F_&bE@k  
   ff_angle = nn * 180 / 3.14159265258979 &33.m
dBH  
End Function

'判断点在区域内函数 t@O4!mFH  
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 {BlKVsQ  
Dim aob, boc, cod, doa, sum As Single
O#5ll2?  
  If ppx = p1x And ppy = p1y Then }.R].4gT  
     point_in = True ~1yMw.04V  
     Exit Function U DC>iHt  
  End If XgmblNp1  
  If ppx = p2x And ppy = p2y Then tSvklI  
     point_in = True )QvuoaJQ  
     Exit Function IAJYD/Y&?  
  End If 7berkU
0P  
   If ppx = p3x And ppy = p3y Then ^sjL@.'m$N  
     point_in = True +e6c4Tw/  
     Exit Function /-W-MP=Wd  
  End If >.-$?2  
     K9J"Q4pEC  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) yw(E}   
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) GqrOj++>  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) yU@~UCmja  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) a}w%k  
    sum = aob + boc + cod + doa #1C~i}J1  
    If 360.01 > sum And sum > 359.99 Then !tNJLOYf  
       point_in = True pM i w9}  
    Else F|DKp[<]8  
       point_in = False qWzzUM1=  
    End If ) -C9W7?I  
End Function

'得到点半径,得到交点坐标函数 {xC C
UU  
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() [wM<J$=2
 
    '求得中心点坐标 >Ufjmm${  
Dim tt As String / h6(!-"  
Dim rt(3) As Single |m%M$^sZ}  
    '判断是否平行 #c0 dZ  
   acx = p3x - p1x xmDX1sL**  
   acy = p3y - p1y ItTIU  
   bdx = p4x - p2x a9E!2o+,  
   bdy = p4y - p2y )6
?.; B  
   If acx * bdy = acy * bdx Then m\lSBy6  
      rt(0) = 0 RT45@   
      Exit Function wjmZ`UMz  
   Else k:4?3zJI  
      '判断斜率存在否 i;0`d0^  
      If p1x = p3x And p2x <> p4x Then hG,gY;&[6  
         tt = "ac_n_bd_y" xX'Uq_Jv  
      ElseIf p1x <> p3x And p2x = p4x Then W7as=+;X  
         tt = "ac_y_bd_n" j}R
4mh  
      ElseIf p1x <> p3x And p2x <> p4x Then |7Q8WjCQ{m  
         tt = "ac_y_bd_y" c=2e?  
      End If ] %*970  
    Select Case tt ^gFjm~2I  
         Case "ac_n_bd_y" sQ^>.yG  
            'bd线段方程 #^Dc:1,  
            k_bd = bdy / bdx Siw9_c  
            b_bd = p2y - k_bd * p2x 6QRfju'  
            p_x = p1x '3o0J\cz  
            p_y = k_bd * p_x + b_bd F_~-o,\  
         Case "ac_y_bd_n" 'KGY;8<x]  
            'ac线段方程 $/C<^}A  
            k_ac = acy / acx e76@-fg  
            b_ac = p1y - k_ac * p1x Et'C4od s  
            p_x = p2x c 3@SgfKmk  
            p_y = k_ac * p_x + b_ac  ZW2#'$b  
        Case "ac_y_bd_y" b,a\`%m}  
           'ac，bd线段都要求 ZZC= 7FB  
           k_ac = acy / acx 4C/8hsn  
           b_ac = p1y - k_ac * p1x ^BM/K&7^  
           k_bd = bdy / bdx +29;T0>a  
           b_bd = p2y - k_bd * p2x L>UYR++<6  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) Jb-wvNJu  
           p_y = k_ac * p_x + b_ac ud:?~?j&w  
        End Select L1QQU  
      rt(1) = p_x l1cBY{3QD  
      rt(2) = p_y Wsz='@XvB  
     fnnwe2aso  
'计算最大半径 1|w,Z+/  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) VP4t~$"  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) :,q3?l6  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 3r em"M  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) (P#2Am$  
Dim bb(5) As Single , m|9L{  
  bb(1) = rr1 `^J~^Z7Y-  
  bb(2) = rr2 A?}OOjA  
  bb(3) = rr3 >KY\Bx  
  bb(4) = rr4 wI}'wALhA  
  nb = rr1 [bPE?_a,  
For i = 1 To 4 N/?MsrZw  
    If nb <= bb(i) Then _R(5?rG,  
       nb = bb(i) n'*Ljp  
    End If $fKwJFr  
Next i !v;r3*#Nky  
    rt(0) = Sqr(nb) 2K*-uT#$~  
    rr = rt() J|FyY)_  
  End If cHsJQU*K6  
         Z `\7B e  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  g7P1]CZ}  

i`SF<)M(  
有热压工艺方面的人才或者资料分享下； 9A_7:V]_  
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 jwq"B$ap  

高手真多！

楼主威武霸气.