[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?/  
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关键点说几个： ,t&-`U]AX  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Am?Hkh2  
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 NUnc"@  
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 Z a1|fB  

以下是几个重要的函数： GGL4<P7  
1.判断点在区域中函数 yz$1qEII`q  
2.计算夹角函数 #!&R7/ KdD  
3.转置函数 |QTqa~~B  
4.得到区域中心点，及区域半径函数 ,p`bWm  
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） KB *#t  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 `&[:!U2]F  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single wR+`("2{r  
   cax = x2 - x1 $5CY<,f  
   cay = y2 - y1 SVWSO  
   cbx = x2 - x3 'L59\y8H  
   cby = y2 - y3 {#M{~  
   mo_jj = cax * cbx + cay * cby ];~[Olc  
   mo_ca = Sqr(cax * cax + cay * cay) C{,] 1X
6g  
   mo_cb = Sqr(cbx * cbx + cby * cby) JU \J   
   cos_acb = mo_jj / (mo_ca * mo_cb) ZV4' |q  
   'ff_cos = cos_acb ',s7h"  
   If cos_acb >= 1 Then :9q^  
   nn = 0 5N+(Gv[`"  
   ElseIf cos_acb <= -1 Then PH%gX`N  
   nn = 3.14159265258979 ]%8;c  
   Else >P"/nS"nn  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) +Qb/:xQu  
   End If pz}hh^]t  
   'ff_angle = nn 9QZwUQ  
   ff_angle = nn * 180 / 3.14159265258979 ayz1i:Q|  
End Function

'判断点在区域内函数 -+@~*$ d  
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 (`/i1#nR  
Dim aob, boc, cod, doa, sum As Single zGz'2,o3  
  If ppx = p1x And ppy = p1y Then ;OqLNfU3y  
     point_in = True @7 HBXP
 
     Exit Function 8&hn$~ate  
  End If Cy'W!qH  
  If ppx = p2x And ppy = p2y Then @$}\S  
     point_in = True Mt
THKp  
     Exit Function [z@RgDXv  
  End If h,?Yw+#o"  
   If ppx = p3x And ppy = p3y Then H4A+Dg,  
     point_in = True }U1shG[  
     Exit Function N ] /d  
  End If DI[^H
 
     8>;o MM  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) _!1c.[\T  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 8Kkr1}!wd  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) D ,^ U%<`  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) pvxqeC9`  
    sum = aob + boc + cod + doa urjp&L&  
    If 360.01 > sum And sum > 359.99 Then g]JI}O*5  
       point_in = True 5
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    Else )X$n'E  
       point_in = False `&7
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    End If qZ1PC
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End Function

'得到点半径,得到交点坐标函数 (:]iHg3  
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()  :Xr3 3  
    '求得中心点坐标 WLFzLW=PD  
Dim tt As String $R36`wk  
Dim rt(3) As Single )+R3C%  
    '判断是否平行 @cNI|T  
   acx = p3x - p1x !XceiQu  
   acy = p3y - p1y 6 VDF@V$E  
   bdx = p4x - p2x ]^%3Y  
   bdy = p4y - p2y f89<o#bm7h  
   If acx * bdy = acy * bdx Then Mt0|`=64  
      rt(0) = 0 |8ZAE%/d  
      Exit Function u{G6xuPWf  
   Else g;@PEZk1  
      '判断斜率存在否 wO NQlt  
      If p1x = p3x And p2x <> p4x Then BtZm_SeA  
         tt = "ac_n_bd_y" cn{l %6K  
      ElseIf p1x <> p3x And p2x = p4x Then Q"uu&JC  
         tt = "ac_y_bd_n" B`Pi\1H6%  
      ElseIf p1x <> p3x And p2x <> p4x Then {.W%m  
         tt = "ac_y_bd_y" UQr+\ u  
      End If Id1[}B-T  
    Select Case tt 5J3kQ;5Q?  
         Case "ac_n_bd_y" tJ3s#q6  
            'bd线段方程 qpCi61lTDJ  
            k_bd = bdy / bdx rR;Om1 -,  
            b_bd = p2y - k_bd * p2x #y%Ao\~kG  
            p_x = p1x ,oe4*b}O=.  
            p_y = k_bd * p_x + b_bd IC~D?c0H:  
         Case "ac_y_bd_n" $E6uA}s  
            'ac线段方程 ><^@
1z.J  
            k_ac = acy / acx cMAfW3j: ;  
            b_ac = p1y - k_ac * p1x )qe o`4+y  
            p_x = p2x #kEdf0  
            p_y = k_ac * p_x + b_ac SNFz#*
  
        Case "ac_y_bd_y" Stpho4+/y  
           'ac，bd线段都要求 |R;=P(0it  
           k_ac = acy / acx Rwk|

cqr  
           b_ac = p1y - k_ac * p1x <u\G&cd_tA  
           k_bd = bdy / bdx L}+!<Ug  
           b_bd = p2y - k_bd * p2x  _>l,%n  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) qB`P7!VN^]  
           p_y = k_ac * p_x + b_ac |n/id(R+  
        End Select ~ME=!;<_  
      rt(1) = p_x hBw~l?G  
      rt(2) = p_y -)GfSk   
     @hv] [(<  
'计算最大半径 m? hX=  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 75u*ZMK  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) @P>@;S  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) IA'AA|v  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) `)fGw7J {  
Dim bb(5) As Single 8*ysuL#  
  bb(1) = rr1 7Ll(,i<,C  
  bb(2) = rr2 <rI~+J]s  
  bb(3) = rr3 ,58[WZ
G  
  bb(4) = rr4 umeb&\:8S-  
  nb = rr1 XDF",N)  
For i = 1 To 4 {3>^nMv@e  
    If nb <= bb(i) Then `JCC-\9T_  
       nb = bb(i) }PJ:9<G y  
    End If I/l]Yv!  
Next i tKs0]8tc  
    rt(0) = Sqr(nb) S3m+(N"&  
    rr = rt() $- L)>"  
  End If K!X8KPo  
         KpL82  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  P)T:6K  

.EI/0"^  
有热压工艺方面的人才或者资料分享下； zdY`c  
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 /%.K`BMN  

高手真多！

楼主威武霸气.