[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： p'/%"  
Pvkr$ou  

描述:请输入描述

图片:2.jpg

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关键点说几个： <m`Os2#  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） w01\KV  
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 G"<} s mB  
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 W6*5e{  

以下是几个重要的函数： P<xCg  
1.判断点在区域中函数 +JFE\>O  
2.计算夹角函数 6x_D0j%^]  
3.转置函数 CM%
;r5  
4.得到区域中心点，及区域半径函数 .TRp74  
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） FVHR  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 XbAoW\D(  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single {{4Sgb  
   cax = x2 - x1 OOX}S1lA  
   cay = y2 - y1 L{i|OK^e  
   cbx = x2 - x3 1
|\/2  
   cby = y2 - y3 mOi 8
W,2  
   mo_jj = cax * cbx + cay * cby z2A1h!Me  
   mo_ca = Sqr(cax * cax + cay * cay) GCA?sFwo>  
   mo_cb = Sqr(cbx * cbx + cby * cby) 6/thhP3`-  
   cos_acb = mo_jj / (mo_ca * mo_cb) V\o&{7!  
   'ff_cos = cos_acb 
wTY8={p]  
   If cos_acb >= 1 Then &!FWo@  
   nn = 0 Bso3Z ^X.  
   ElseIf cos_acb <= -1 Then .Cf`D tK  
   nn = 3.14159265258979 !|S{e^WhbU  
   Else FY;R0+N  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) L9)
nRV8  
   End If 4~/3MG  
   'ff_angle = nn ;v1&Rs  
   ff_angle = nn * 180 / 3.14159265258979 h/n&&J  
End Function

'判断点在区域内函数 ]RJcY1  
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 IvyBK]{|  
Dim aob, boc, cod, doa, sum As Single k9<P]%  
  If ppx = p1x And ppy = p1y Then g4 |s9RMD  
     point_in = True eO:wx.PW  
     Exit Function n++L =&Wd  
  End If dLMKfh/4Q  
  If ppx = p2x And ppy = p2y Then qEoa%O  
     point_in = True Sc zYL?w^  
     Exit Function l4sFT)}-J  
  End If +5+?)8Ls  
   If ppx = p3x And ppy = p3y Then 2& l~8,  
     point_in = True _#/zH~V%  
     Exit Function @dzO{)  
  End If ZsP
T!l,  
     4j'cXxo  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) MZX-<p+  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Z'vGX,:  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) _8CE|<Cn  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) F#w=z/  
    sum = aob + boc + cod + doa |h; _r&  
    If 360.01 > sum And sum > 359.99 Then Ol~jq;75  
       point_in = True OA_Bz"  
    Else CN$wlhs  
       point_in = False *L3>:],7  
    End If n~g,qEI;<x  
End Function

'得到点半径,得到交点坐标函数 SJRiMR_F~  
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() vPn(~d_  
    '求得中心点坐标 5m`@ 4%)zp  
Dim tt As String .&AS-">Z  
Dim rt(3) As Single <303PPX^6  
    '判断是否平行 $Q[a^V~:  
   acx = p3x - p1x 9~^%v zM  
   acy = p3y - p1y 1Y"[Qs]"mU  
   bdx = p4x - p2x t UJ m}+=>  
   bdy = p4y - p2y G H
N  
   If acx * bdy = acy * bdx Then OA\2ja~+  
      rt(0) = 0 Z^w}: {  
      Exit Function P| o_/BS  
   Else b{C3r3B8  
      '判断斜率存在否 MZGN,[~)6  
      If p1x = p3x And p2x <> p4x Then pv.
0!a/M  
         tt = "ac_n_bd_y" 3McBTa!  
      ElseIf p1x <> p3x And p2x = p4x Then x:`]uOp  
         tt = "ac_y_bd_n" %C_RBd  
      ElseIf p1x <> p3x And p2x <> p4x Then HG2i^y  
         tt = "ac_y_bd_y" h\k!X/  
      End If ef\Pu\'U  
    Select Case tt &wbe^Wp  
         Case "ac_n_bd_y" l I&%^>  
            'bd线段方程 }b-"[TDEF  
            k_bd = bdy / bdx $6~D 2K  
            b_bd = p2y - k_bd * p2x ]VifDFL
}  
            p_x = p1x n{dl-P  
            p_y = k_bd * p_x + b_bd !@9Vq6  
         Case "ac_y_bd_n" M^\#(0^2@  
            'ac线段方程 `p@YV(  
            k_ac = acy / acx jg]_'^pVzr  
            b_ac = p1y - k_ac * p1x j$h.V#1z  
            p_x = p2x *Z! #6(G  
            p_y = k_ac * p_x + b_ac [HJ^'/bB'  
        Case "ac_y_bd_y" z116i?7EnV  
           'ac，bd线段都要求 7]t$t3I`  
           k_ac = acy / acx seh1(q?Va4  
           b_ac = p1y - k_ac * p1x eeX^zaKl]  
           k_bd = bdy / bdx qEC-'sl<  
           b_bd = p2y - k_bd * p2x ozZW7dveU  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 'u }|~u
?m  
           p_y = k_ac * p_x + b_ac >=|Dir  
        End Select G992{B  
      rt(1) = p_x wu5]S)?*  
      rt(2) = p_y hr&&"d {s  
     5Z]zul@+*  
'计算最大半径 P9~7GFas|  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) q-%;~LF  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) A)/ 8FYc  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) %./vh=5)  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) gTE/g'3  
Dim bb(5) As Single xS%
Z   
  bb(1) = rr1 H#IJ&w|  
  bb(2) = rr2 \|\Dc0p}  
  bb(3) = rr3 $Q,Fr; B  
  bb(4) = rr4 6eSc
`t&  
  nb = rr1 D"^4X'6  
For i = 1 To 4 6-U+<[,x  
    If nb <= bb(i) Then g9> 0N#<  
       nb = bb(i) Ca]+*Eb9z{  
    End If Tbl~6P  
Next i vT)(#0>z  
    rt(0) = Sqr(nb) OOy]:t4 /  
    rr = rt() 1|)l6#hOL  
  End If Y4cIYUSc  
         hu (h'  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  \s
B a  

,4$ZB(\  
有热压工艺方面的人才或者资料分享下； J@RhbsZn  
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 WE""be8  

高手真多！

楼主威武霸气.