[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： GC'O[q+  
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图片:2.jpg

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关键点说几个： kU`r)=1"  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） SgOheN-  
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 =tY T8Q;al  
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 Y<8vw d  

以下是几个重要的函数： sx<%2  
1.判断点在区域中函数 H>@+om  
2.计算夹角函数 WuW^GC{7  
3.转置函数 W@!S%Y9  
4.得到区域中心点，及区域半径函数 hR|MEn6KC  
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） RpYERAgT  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 WMP,\=6k0  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single >@AB<$A  
   cax = x2 - x1 B?o7e<l[  
   cay = y2 - y1 SK
.: Q5:  
   cbx = x2 - x3 \5cpFj5%  
   cby = y2 - y3 yR.Ong  
   mo_jj = cax * cbx + cay * cby xAP+FWyV  
   mo_ca = Sqr(cax * cax + cay * cay) 2dgd~   
   mo_cb = Sqr(cbx * cbx + cby * cby) .3!1`L3  
   cos_acb = mo_jj / (mo_ca * mo_cb) y18Y:)DkL  
   'ff_cos = cos_acb 3{(/x1a,4  
   If cos_acb >= 1 Then sUm'  
   nn = 0 #LN`X8Wz'  
   ElseIf cos_acb <= -1 Then j1HW._G  
   nn = 3.14159265258979 Nl1Do:PY  
   Else dGTsc/$  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) v74&BL]a
 
   End If /JU.?M35  
   'ff_angle = nn ]jRfH(i  
   ff_angle = nn * 180 / 3.14159265258979 ?b5^  
End Function

'判断点在区域内函数 _8agtQ:<  
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 Pd]|:W< E  
Dim aob, boc, cod, doa, sum As Single R_S.tT!  
  If ppx = p1x And ppy = p1y Then 
w^0nqh  
     point_in = True ib791  
     Exit Function <yg
F(  
  End If Ok\7y-w^  
  If ppx = p2x And ppy = p2y Then R .2wqkY  
     point_in = True {P#|zp4C{  
     Exit Function ',5ky{  
  End If ^D-/`d  
   If ppx = p3x And ppy = p3y Then *bpD`s @  
     point_in = True 2jCfT>`3  
     Exit Function QoH6  
  End If d4z/5Oa  
     VBcPu  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) {U !g.rh  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Tc3yS(aq  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Z>#i**  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) LvYB7<zk>  
    sum = aob + boc + cod + doa c_!cv":s  
    If 360.01 > sum And sum > 359.99 Then 0%I=d  
       point_in = True ?=fyc1  
    Else r^ ZEImjc  
       point_in = False ayF\nk4b  
    End If ZO$%[ftb  
End Function

'得到点半径,得到交点坐标函数 o J;$sj  
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() ]-QA'Lq  
    '求得中心点坐标 T0rGM  
Dim tt As String mUF,@>o  
Dim rt(3) As Single n^6j9FQ7  
    '判断是否平行 'Ne@e)s9  
   acx = p3x - p1x N_[*H  
   acy = p3y - p1y OX\F~+  
   bdx = p4x - p2x PBkt~=j  
   bdy = p4y - p2y 5(HG|  
   If acx * bdy = acy * bdx Then GYUn6P  
      rt(0) = 0 (0y~%J  
      Exit Function _~iw[*#u  
   Else $[=%R`~w  
      '判断斜率存在否 ]}2ZttQ?  
      If p1x = p3x And p2x <> p4x Then )~ h}  
         tt = "ac_n_bd_y" #"iu|D  
      ElseIf p1x <> p3x And p2x = p4x Then x>`%DwoRI  
         tt = "ac_y_bd_n" C#Iybg  
      ElseIf p1x <> p3x And p2x <> p4x Then c.F6~IHu7  
         tt = "ac_y_bd_y" Pce;r*9  
      End If X1vd'
>  
    Select Case tt r#]WI|  
         Case "ac_n_bd_y" /{--+ C  
            'bd线段方程 xbYi.  
            k_bd = bdy / bdx }s<4{:cv+  
            b_bd = p2y - k_bd * p2x _X"N1,0  
            p_x = p1x aM0f/"-_  
            p_y = k_bd * p_x + b_bd n3 r3"~i  
         Case "ac_y_bd_n" Qhcu>ra  
            'ac线段方程 zi*R`;_`,  
            k_ac = acy / acx L.0mk_&  
            b_ac = p1y - k_ac * p1x um>6z_"  
            p_x = p2x Is?La  
            p_y = k_ac * p_x + b_ac gn".u!9j  
        Case "ac_y_bd_y" PGV/ h  
           'ac，bd线段都要求 Jcm&RI"{  
           k_ac = acy / acx +-CtjhoS  
           b_ac = p1y - k_ac * p1x ZlzjVU/E  
           k_bd = bdy / bdx g0ly  
           b_bd = p2y - k_bd * p2x e|WJQd4+S  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) d-r@E3  
           p_y = k_ac * p_x + b_ac % 0+j?>#X  
        End Select 9kS^Abtk  
      rt(1) = p_x @eIJ]p  
      rt(2) = p_y qfRH5)k  
     d;9FB[MmOJ  
'计算最大半径 vJOw]cwq  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) b-Q>({=i  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) T&o(N3lW  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) !fR3(=oN  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) bsA-2*Q+  
Dim bb(5) As Single s?,Ek  
  bb(1) = rr1 C-6F]2:  
  bb(2) = rr2 Y+u_IJ  
  bb(3) = rr3 '|p$)yx2  
  bb(4) = rr4 ktBj|-'>  
  nb = rr1 ~=RT*>G_  
For i = 1 To 4 2OR{[L*  
    If nb <= bb(i) Then ^qQZT]  
       nb = bb(i) f-G:uI_  
    End If KP5C}ZK+s  
Next i YU5(g^<  
    rt(0) = Sqr(nb) E3gh?6  
    rr = rt() nWYN Np?h  
  End If "PTZ%7YH}  
         kbMWGB%;  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  (\a]"g,]v  

t2"O  
有热压工艺方面的人才或者资料分享下； G_{&sa  
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 C8e !H  

高手真多！

楼主威武霸气.