[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： 3k%fY  
@B.;V=8wJ  
bxxazsj^  

关键点说几个： Ark+Df/  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） y#Cp Vm#!>  
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 tVAWc$3T  
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 t>f61<27eB  

以下是几个重要的函数： |E& Fe8  
1.判断点在区域中函数 |igr3p5Fw  
2.计算夹角函数 PZT]H?  
3.转置函数 *\-R
&8  
4.得到区域中心点，及区域半径函数 ZsgJ6 Y  
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） /*V:Lh  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 MD"a%H#p  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 3SI~?&HU!/  
   cax = x2 - x1 qD/GYqvm  
   cay = y2 - y1 Q3@MRR^tY  
   cbx = x2 - x3 T<jo@
z1UL  
   cby = y2 - y3 X@["Jjp  
   mo_jj = cax * cbx + cay * cby LTn@OhC  
   mo_ca = Sqr(cax * cax + cay * cay)  (0wQ [(  
   mo_cb = Sqr(cbx * cbx + cby * cby) ^R g=*L  
   cos_acb = mo_jj / (mo_ca * mo_cb) wqB 5KxO  
   'ff_cos = cos_acb nnzfKn:J  
   If cos_acb >= 1 Then 6w?l I  
   nn = 0 YK=o[nPmK  
   ElseIf cos_acb <= -1 Then B-R& v8F  
   nn = 3.14159265258979 @]{+9m8G@  
   Else 0mb|JoE(  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ""Ub^:ucD  
   End If t PJW|wo  
   'ff_angle = nn 0xN1Xm0d  
   ff_angle = nn * 180 / 3.14159265258979 $] gwaJ:  
End Function

'判断点在区域内函数 u|G&CV#r  
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 #"T< mM7  
Dim aob, boc, cod, doa, sum As Single S-5|t]LV  
  If ppx = p1x And ppy = p1y Then 9s.x%m,  
     point_in = True Pse1NMK9 [  
     Exit Function ?<*mIf:?  
  End If L[j73z'  
  If ppx = p2x And ppy = p2y Then pv}k=wqJ1  
     point_in = True 1xBg^  
     Exit Function ~xp(k  
  End If eG@0:  
   If ppx = p3x And ppy = p3y Then rUz-\H(-  
     point_in = True (V06cb*42[  
     Exit Function hoLQuh%2%  
  End If #A:+|{H"  
     !5wuBJ0  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) |riP*b
 
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) W1$<,4j@M  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 0afDqvrC6  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ask76  e  
    sum = aob + boc + cod + doa <*Ex6/j  
    If 360.01 > sum And sum > 359.99 Then ./KXElvQ%  
       point_in = True DHnO ,"  
    Else 46(=*iT&V  
       point_in = False {9,!XiF.:  
    End If liuw!
  
End Function

'得到点半径,得到交点坐标函数 MT3TWWtZ:  
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() =.Hq]l6+  
    '求得中心点坐标 -aV!ZODt  
Dim tt As String >Av[`1a2F  
Dim rt(3) As Single qb[UA5S\`  
    '判断是否平行 zZhA]J  
   acx = p3x - p1x 01_*^iCf5  
   acy = p3y - p1y Rn4Bl8z'>  
   bdx = p4x - p2x tx9;8K3  
   bdy = p4y - p2y ?6#F9\  
   If acx * bdy = acy * bdx Then KT9!R  
      rt(0) = 0 [2l2w[7Rid  
      Exit Function oZ!1^o3V  
   Else HO`N]AMw  
      '判断斜率存在否 `Vf k
.OP  
      If p1x = p3x And p2x <> p4x Then
5Xr<~xr  
         tt = "ac_n_bd_y" 5L!cS+QNU  
      ElseIf p1x <> p3x And p2x = p4x Then [e6zCN^t  
         tt = "ac_y_bd_n"
)<+t#5"  
      ElseIf p1x <> p3x And p2x <> p4x Then ALO0yc  
         tt = "ac_y_bd_y" ]E:K8E  
      End If :MFF*1  
    Select Case tt 5dNM:1VoE  
         Case "ac_n_bd_y" o]jPG  
            'bd线段方程 cN&]JS,  
            k_bd = bdy / bdx >Hd0l L  
            b_bd = p2y - k_bd * p2x h
@H8oZ[  
            p_x = p1x &%\H170S  
            p_y = k_bd * p_x + b_bd <=g{E-  
         Case "ac_y_bd_n" @L/p  
            'ac线段方程 "rJJ~[Y  
            k_ac = acy / acx c*~/`lG  
            b_ac = p1y - k_ac * p1x pFW^  
            p_x = p2x hUo}n>Aa  
            p_y = k_ac * p_x + b_ac u
;/5@ADW
 
        Case "ac_y_bd_y" tF&g3)D:NV  
           'ac，bd线段都要求 n]Z() "D  
           k_ac = acy / acx uA]!y{"}J  
           b_ac = p1y - k_ac * p1x IBn+42V  
           k_bd = bdy / bdx wa f)S=  
           b_bd = p2y - k_bd * p2x t)__J\xF  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 7J6D wh{  
           p_y = k_ac * p_x + b_ac oz[
Mt i*  
        End Select !*1Kjg3  
      rt(1) = p_x z=[?&X]O9b  
      rt(2) = p_y )a=58r07  
     6dlV:f_\y  
'计算最大半径 S!@h\3d8{  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) TaqqEL  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 921m'WE  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 1.S?(1e"  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 9:v0gE+.  
Dim bb(5) As Single W3M1> (  
  bb(1) = rr1 XN Gw@$  
  bb(2) = rr2 _B6W:k|-7l  
  bb(3) = rr3 DN0`vl{*  
  bb(4) = rr4 (/;<K$u*h  
  nb = rr1 vvwQ/iJO4Q  
For i = 1 To 4 5BAGIO<w  
    If nb <= bb(i) Then 5z=.Z\M`8  
       nb = bb(i) p2I
9t|  
    End If VsjE*AJpe  
Next i M7PGs-l  
    rt(0) = Sqr(nb) 41XS/# M$*  
    rr = rt() &WV&_z  
  End If AL{r/h  
         5oTj^W8M(  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  B*OBXN>'P  

SQ la]%  
有热压工艺方面的人才或者资料分享下； MRN=-|fV^  
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 6mmc{kw'  

高手真多！

楼主威武霸气.