[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： dk7x<$h-h0  
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Uh0g !zzp  

关键点说几个： k{r<S|PK0  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） #j Tkz  
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 6?xF!VIL  
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 .c>6}:ye  

以下是几个重要的函数： Hya.OW{  
1.判断点在区域中函数 J#Q>dC7  
2.计算夹角函数 ZklO9Ox(  
3.转置函数 RL&0?OT  
4.得到区域中心点，及区域半径函数 1BmKwux:  
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） >-V632(/{o  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 /t`|3Mw  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 0,-]O=   
   cax = x2 - x1 &*o4~6pQ#  
   cay = y2 - y1 -J=6)  
   cbx = x2 - x3 i`52tH y_  
   cby = y2 - y3 u ]y[g  
   mo_jj = cax * cbx + cay * cby xtCMK1# x  
   mo_ca = Sqr(cax * cax + cay * cay) ]gX8z#*k  
   mo_cb = Sqr(cbx * cbx + cby * cby) _"x%s  
   cos_acb = mo_jj / (mo_ca * mo_cb) t{B@k[|  
   'ff_cos = cos_acb y=pW+$k  
   If cos_acb >= 1 Then MA_YMxP.'  
   nn = 0 ?f9M59(l  
   ElseIf cos_acb <= -1 Then EZ>(}  
   nn = 3.14159265258979 <BT18u\  
   Else =c 9nC;C  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) /tG as  
   End If +5I5  
   'ff_angle = nn ZD]{HxGL!  
   ff_angle = nn * 180 / 3.14159265258979 #/Ob_~-?j  
End Function

'判断点在区域内函数 @i> r(
X  
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 WJ-.?   
Dim aob, boc, cod, doa, sum As Single .|u`s,\  
  If ppx = p1x And ppy = p1y Then \:s%;s51  
     point_in = True |AE{rvP{@  
     Exit Function ]v5/K  
  End If qLX<[UL  
  If ppx = p2x And ppy = p2y Then ;X]B0KFe7  
     point_in = True qT$IV\;_  
     Exit Function _1Rw~}O  
  End If x0%m}P/
 
   If ppx = p3x And ppy = p3y Then 4a&8G  
     point_in = True <z%**gP~G  
     Exit Function Wtw,YFT  
  End If At[Q0'jkc  
     (Nz`w  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ChUE,)  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) f*"T]AX0  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) :qqG%RB  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) y@$E5sz  
    sum = aob + boc + cod + doa 6Q>:vQ+E  
    If 360.01 > sum And sum > 359.99 Then 0+qC_ISns  
       point_in = True ^S;{;c+'  
    Else !^y;|9?O  
       point_in = False ?(R#  
    End If T=~d.&J  
End Function

'得到点半径,得到交点坐标函数 `Rq|*:LV  
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() ~vpF|4Zn5  
    '求得中心点坐标 SD*q+Si,1U  
Dim tt As String hR0a
5  
Dim rt(3) As Single T?[;ej:  
    '判断是否平行 Wk3-J&QbS  
   acx = p3x - p1x .H M3s  
   acy = p3y - p1y 3'6 UvAXFH  
   bdx = p4x - p2x Go:(R {P  
   bdy = p4y - p2y NL `  
   If acx * bdy = acy * bdx Then -le^ 5M7  
      rt(0) = 0 i" u|119  
      Exit Function "8ZV%%elp  
   Else 'xai5X  
      '判断斜率存在否 n2-+.9cY  
      If p1x = p3x And p2x <> p4x Then YWd2bRb  
         tt = "ac_n_bd_y" EI?8/c  
      ElseIf p1x <> p3x And p2x = p4x Then tvVf)bbz  
         tt = "ac_y_bd_n" _~CJitR3  
      ElseIf p1x <> p3x And p2x <> p4x Then  r90tXx  
         tt = "ac_y_bd_y" >*O5Ry:4  
      End If ;c]O*\/  
    Select Case tt r|ZB3L|7  
         Case "ac_n_bd_y" !wd wo0  
            'bd线段方程 1TA!9cz0Z  
            k_bd = bdy / bdx W!.FnM5x  
            b_bd = p2y - k_bd * p2x QaEiPn~  
            p_x = p1x jCtk3No  
            p_y = k_bd * p_x + b_bd ]Z\W%'q+  
         Case "ac_y_bd_n" ND?
"1/s  
            'ac线段方程 Z)~?foe'  
            k_ac = acy / acx :+QNN<  
            b_ac = p1y - k_ac * p1x bxxLAWQ(  
            p_x = p2x $
1d{R;b[  
            p_y = k_ac * p_x + b_ac ^J^~5q8  
        Case "ac_y_bd_y" 9cN@y<_I  
           'ac，bd线段都要求 gU&+^e >  
           k_ac = acy / acx .Xf_U.h$*@  
           b_ac = p1y - k_ac * p1x P%yL{  
           k_bd = bdy / bdx ^9hc`.5N&?  
           b_bd = p2y - k_bd * p2x AIQ {^:  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 8'3&z-  
           p_y = k_ac * p_x + b_ac E>*b,^J7g  
        End Select `g(#~0R  
      rt(1) = p_x j?$B@Zk  
      rt(2) = p_y CpX[8>&osD  
     U)-aecB!  
'计算最大半径 # Dgkl  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) &u[F)|  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) [-Y~g%M  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) GadY#]}(  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) I;_T_m4.q  
Dim bb(5) As Single %j17QD8  
  bb(1) = rr1 a}VR>!b  
  bb(2) = rr2
o8E<_rei  
  bb(3) = rr3 zSsBbu:  
  bb(4) = rr4 k)F!gV#  
  nb = rr1 O(0a l#Fvj  
For i = 1 To 4 FO!0TyQ  
    If nb <= bb(i) Then 6OC4?#96%'  
       nb = bb(i) ]!P6Z?  
    End If /M]P&Zb |  
Next i lc fAb@}2  
    rt(0) = Sqr(nb) c; .y  
    rr = rt() Ux" ^3D  
  End If Fv/{)H<:y  
         IhSXU<]  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  #V[Os!ns  

>8`;SEnv  
有热压工艺方面的人才或者资料分享下； skt9mU  
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 !i{5mc\  

高手真多！

楼主威武霸气.