[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：  +Lhe,  
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关键点说几个： V07VwVD  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ovbEmb  
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 |SxMN%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 F:S"gRKz  

以下是几个重要的函数： p1klLX  
1.判断点在区域中函数 sbgJw  
2.计算夹角函数 qg|Ox*_od"  
3.转置函数 p%tE v  
4.得到区域中心点，及区域半径函数 D/e&7^iK  
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） 40R"^*  
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!(*F@M,  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single dJloH)uJZ>  
   cax = x2 - x1 $|rCrak;  
   cay = y2 - y1 fBf]4@{
  
   cbx = x2 - x3 NS h%t+XU]  
   cby = y2 - y3 m\_+)eI|  
   mo_jj = cax * cbx + cay * cby LFl2uV"  
   mo_ca = Sqr(cax * cax + cay * cay) fdN45in=>  
   mo_cb = Sqr(cbx * cbx + cby * cby) BHEs+e0  
   cos_acb = mo_jj / (mo_ca * mo_cb) "tfn?n0  
   'ff_cos = cos_acb
_L8Mpx*E  
   If cos_acb >= 1 Then MgHOj  
   nn = 0 +8]W\<Kp  
   ElseIf cos_acb <= -1 Then mp!YNI  
   nn = 3.14159265258979 ]gH wfqx  
   Else n; Lo  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) lQ+Ru8I  
   End If 43+EX
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   'ff_angle = nn joxS+P5#  
   ff_angle = nn * 180 / 3.14159265258979 su,`q  
End Function

'判断点在区域内函数 AmP#'U5  
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 xylpiSJ  
Dim aob, boc, cod, doa, sum As Single OD{5m(JwL  
  If ppx = p1x And ppy = p1y Then 3yeK@>C  
     point_in = True kJHr&=VO~  
     Exit Function ,lrYl!,  
  End If V*~1,6N[  
  If ppx = p2x And ppy = p2y Then aeEw#  
     point_in = True O]c=Yyl  
     Exit Function eV"dv*R  
  End If =6.8bZT\
 
   If ppx = p3x And ppy = p3y Then b{Z^)u2X  
     point_in = True xR\D(FLVS  
     Exit Function m"96:v  
  End If "9c.CI  
     sjkWz2]S  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) RpBiE8F4  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) $KoPGgC[  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) x, G6\QmA  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) szf"|k!  
    sum = aob + boc + cod + doa .}IK}A/-  
    If 360.01 > sum And sum > 359.99 Then ZC3tb
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       point_in = True 9V|E1-")E  
    Else LXBbz;vYl  
       point_in = False uPa/,"p  
    End If v[0DE*p  
End Function

'得到点半径,得到交点坐标函数 bYwI==3
 
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() jxRF"GD  
    '求得中心点坐标 Wl^prs7}c  
Dim tt As String A)b)ff,  
Dim rt(3) As Single ]_^"|RJ  
    '判断是否平行 zjluX\  
   acx = p3x - p1x .b=M5JsyV  
   acy = p3y - p1y r1[E{Tpz  
   bdx = p4x - p2x U%mkhWn  
   bdy = p4y - p2y (z8]FT  
   If acx * bdy = acy * bdx Then -/(DPx  
      rt(0) = 0 3q~":bpAp  
      Exit Function Q3<bC6$r  
   Else p)?qJ2c|  
      '判断斜率存在否 ?z\q Mu  
      If p1x = p3x And p2x <> p4x Then ikEWY_1Y  
         tt = "ac_n_bd_y" ua]\xBWx  
      ElseIf p1x <> p3x And p2x = p4x Then 7Y-FUZ.`>  
         tt = "ac_y_bd_n" /|4Q9=  
      ElseIf p1x <> p3x And p2x <> p4x Then W~XV  
         tt = "ac_y_bd_y" v`[Tl  
      End If =:xV(GK}  
    Select Case tt 2*~JMbm  
         Case "ac_n_bd_y" R-r+=x&  
            'bd线段方程 %Y)PH-z  
            k_bd = bdy / bdx Zu2m%=J`  
            b_bd = p2y - k_bd * p2x fZka%[B  
            p_x = p1x ?$"x^=te7  
            p_y = k_bd * p_x + b_bd "e1{V8 4  
         Case "ac_y_bd_n" |'V<>v.v  
            'ac线段方程 JfZL?D{NM  
            k_ac = acy / acx aGq_hP   
            b_ac = p1y - k_ac * p1x x
'E'jh%  
            p_x = p2x rh:s 7  
            p_y = k_ac * p_x + b_ac 2]of SdM  
        Case "ac_y_bd_y" EmtDrx4!(f  
           'ac，bd线段都要求 "?2  
           k_ac = acy / acx p6&LZ=tL3  
           b_ac = p1y - k_ac * p1x o1 hdO  
           k_bd = bdy / bdx i#pjv'C  
           b_bd = p2y - k_bd * p2x p=8M0k  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) E)&NP}k-P  
           p_y = k_ac * p_x + b_ac Pi&fwGL  
        End Select ;#5-.z  
      rt(1) = p_x ugIm:bg&  
      rt(2) = p_y kbIY%\QSO  
     *([0"  
'计算最大半径 tMD^$E"C  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 2- Npw%;  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) p?Z+z  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ;w>3,ub(0  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) hQg,#r(JE4  
Dim bb(5) As Single ZXssvjWQV}  
  bb(1) = rr1 yBYuDfeZ  
  bb(2) = rr2 sx)$=~o  
  bb(3) = rr3 )H[h53bIq  
  bb(4) = rr4 )*^OPVt  
  nb = rr1 ^G'yaaLXR  
For i = 1 To 4 |?;"B:0  
    If nb <= bb(i) Then SHXa{-  
       nb = bb(i) 7(A G]  
    End If KV^:sxU  
Next i }2iKi(io*  
    rt(0) = Sqr(nb) >0g`U  
    rr = rt() :w {M6mM>  
  End If {L-{Y<fke  
         }6uV]V{  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  k>z-Zg  

BorfEv} SN  
有热压工艺方面的人才或者资料分享下； )H37a  
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 R
=Ly49  

高手真多！

楼主威武霸气.