[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： \z@:OR,  
>@-BZJg/k  
fNrpYR X  

关键点说几个： W yP]]I.
 
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ?'t
FTh  
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 !<h-2YF<M  
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 ,nUovWN07  

以下是几个重要的函数： C5X!H_p  
1.判断点在区域中函数 E7<l^/<2S+  
2.计算夹角函数 ci
CQe]fS  
3.转置函数 8K\S]SZ  
4.得到区域中心点，及区域半径函数 _akpW  
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） K8v@)  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 :;&3"-  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single tR?)C=4,  
   cax = x2 - x1 zRm@ |IT  
   cay = y2 - y1 PD^Cj?wm  
   cbx = x2 - x3 :M@#.  
   cby = y2 - y3 }~v0o# I  
   mo_jj = cax * cbx + cay * cby U@LIw6B!KL  
   mo_ca = Sqr(cax * cax + cay * cay) '*
K%\]  
   mo_cb = Sqr(cbx * cbx + cby * cby) }#Kl6x  
   cos_acb = mo_jj / (mo_ca * mo_cb) i~{0>
"9  
   'ff_cos = cos_acb |O*?[|`H  
   If cos_acb >= 1 Then G~f|Sx  
   nn = 0 #*"I?B/fd8  
   ElseIf cos_acb <= -1 Then X/
D% cQ6  
   nn = 3.14159265258979 {YIVi:4q  
   Else Et;Ubj"+  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 07vzVsQ
}p  
   End If uA\KbA.c;U  
   'ff_angle = nn kM
76?M  
   ff_angle = nn * 180 / 3.14159265258979 |u[@g`Z  
End Function

'判断点在区域内函数 *zv*T"&ZP  
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 L#MM
N
c+  
Dim aob, boc, cod, doa, sum As Single 1HeE$  
  If ppx = p1x And ppy = p1y Then q=26($  
     point_in = True ezhK[/E=  
     Exit Function B~u
`bn,iQ  
  End If E>YE3-]  
  If ppx = p2x And ppy = p2y Then 9gETWz(3I  
     point_in = True &C6*"JZ4  
     Exit Function a=*JyZ.2  
  End If gV-A+;u  
   If ppx = p3x And ppy = p3y Then {fn1sGA  
     point_in = True C=DC g  
     Exit Function mzn#4;m$  
  End If 2Jt*s$  
     AN+S6t  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) vgKdhN2kI  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Yo,n#<37  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) I=7 YAm[W  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 69zMWuY  
    sum = aob + boc + cod + doa b25C[C5C  
    If 360.01 > sum And sum > 359.99 Then 
UQJ  
       point_in = True P?<G:]W  
    Else d-B,)$zE  
       point_in = False y~py+:_  
    End If ^x}k1F3  
End Function

'得到点半径,得到交点坐标函数 -~^sSLrbP  
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() {A{sRT=%  
    '求得中心点坐标 8g3?@i  
Dim tt As String Di&XDW/  
Dim rt(3) As Single KKNQ+'?  
    '判断是否平行 70N Lv  
   acx = p3x - p1x ?GeMD /]  
   acy = p3y - p1y dEPLkv  
   bdx = p4x - p2x g ?{o2gG  
   bdy = p4y - p2y `~2I  
   If acx * bdy = acy * bdx Then kB_T9$0e#  
      rt(0) = 0 6rN.)dL.#N  
      Exit Function 9+I/bl4  
   Else Ypx"<CKP}  
      '判断斜率存在否 .c\iKc#  
      If p1x = p3x And p2x <> p4x Then ]eo%eaA   
         tt = "ac_n_bd_y" W]M Fq5.  
      ElseIf p1x <> p3x And p2x = p4x Then B<&g  
         tt = "ac_y_bd_n" }KR"0G[f  
      ElseIf p1x <> p3x And p2x <> p4x Then G/yYIs  
         tt = "ac_y_bd_y" D[3QQT7c  
      End If %ZGG6Xgw  
    Select Case tt uevhW  
         Case "ac_n_bd_y" yG,uD!N]|  
            'bd线段方程 6-f-/$B  
            k_bd = bdy / bdx RdLk85<n  
            b_bd = p2y - k_bd * p2x 1n~^@f#`  
            p_x = p1x sv+6#  
            p_y = k_bd * p_x + b_bd g\G}b  
         Case "ac_y_bd_n" LMI7Ih;  
            'ac线段方程 PySFhb@  
            k_ac = acy / acx QQ./!  
            b_ac = p1y - k_ac * p1x MCl-er"]D  
            p_x = p2x pLtK
:Z  
            p_y = k_ac * p_x + b_ac
SL?YU(a  
        Case "ac_y_bd_y" P}"uC`036  
           'ac，bd线段都要求 #S"s8wdD  
           k_ac = acy / acx -b=Aj8h  
           b_ac = p1y - k_ac * p1x t
/h,-x  
           k_bd = bdy / bdx Jj~|2Zt  
           b_bd = p2y - k_bd * p2x 96<0=   
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) D|IS@gWa  
           p_y = k_ac * p_x + b_ac RSup_4A  
        End Select fxc?+<P  
      rt(1) = p_x EAK[2?CY  
      rt(2) = p_y kQO-V4z!  
     2Wr^#PY60  
'计算最大半径 5'n$aFqI  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) @nIoIz D~  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Fmzkbt~oe  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) zEi\#Zg$  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 6bT>x5?  
Dim bb(5) As Single TEi1,yc  
  bb(1) = rr1 !HKW_m^3J  
  bb(2) = rr2 ;3+_aoY  
  bb(3) = rr3 i-R}O6  
  bb(4) = rr4 0e(4+:0  
  nb = rr1 Dw<bLSaW&  
For i = 1 To 4 u4ZOHy_O^  
    If nb <= bb(i) Then {2U3   
       nb = bb(i) {TaYkuWS  
    End If ff 6x4t  
Next i ?Zc(Zy6  
    rt(0) = Sqr(nb) ba^/Ar(B  
    rr = rt() |g1Pr9{wy  
  End If 9s?gI4XN  
         M"yOWD~s~  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Dw$RHogb~y  

`26.+>Z7  
有热压工艺方面的人才或者资料分享下； i*@ZIw  
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 @FF80U4'  

高手真多！

楼主威武霸气.