[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： f>5{SoM  
1A">tgA1  

描述:请输入描述

图片:2.jpg

sW#6B+5_k  

关键点说几个： xRJv_=dT  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 1/3Go97/qV  
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 gc7S_D~;  
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 ?Il$f_"B:  

以下是几个重要的函数： ^{_`jE  
1.判断点在区域中函数 S>aN#  
2.计算夹角函数 x,STt{I=  
3.转置函数 \('8_tqI"  
4.得到区域中心点，及区域半径函数 ?7'uo$  
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） #]oVVf_  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 gdRwh  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 5u MP31  
   cax = x2 - x1 wLPL9  
   cay = y2 - y1 7KnZ  
   cbx = x2 - x3 -]~&Pi|  
   cby = y2 - y3 `$j
c=ZLm  
   mo_jj = cax * cbx + cay * cby b!J21cg<L  
   mo_ca = Sqr(cax * cax + cay * cay) a=&a)FR  
   mo_cb = Sqr(cbx * cbx + cby * cby) 13I 7ah  
   cos_acb = mo_jj / (mo_ca * mo_cb) {v}f/cu  
   'ff_cos = cos_acb RRqHo~*0  
   If cos_acb >= 1 Then **d3uc4y  
   nn = 0 w-2p'u['Z  
   ElseIf cos_acb <= -1 Then WLQm|C,  
   nn = 3.14159265258979 ce\]o^4  
   Else Qa~o'  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) [nJ),9$z_  
   End If {O*WLZ{0  
   'ff_angle = nn %kS+n_*  
   ff_angle = nn * 180 / 3.14159265258979 y~w2^VN=  
End Function

'判断点在区域内函数 v=EV5#A  
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 nR-`;lrF~  
Dim aob, boc, cod, doa, sum As Single cu5Yvp  
  If ppx = p1x And ppy = p1y Then q{HfT d  
     point_in = True bYGK}:T8U  
     Exit Function abh='5H|^|  
  End If H'Bor\;[>  
  If ppx = p2x And ppy = p2y Then oA%8k51>~K  
     point_in = True 0tv"tA;  
     Exit Function 1P:r=Rt/  
  End If $@"o BCc  
   If ppx = p3x And ppy = p3y Then Lg0Vn&k  
     point_in = True LFvKF.  
     Exit Function >j5) MF{"  
  End If l5F>v!NA  
     uo;aC$US  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 9>\P]:  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) "Kx2k>ym  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) GoP,_sd\O  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) y.AVH`_u  
    sum = aob + boc + cod + doa !'o5X]s  
    If 360.01 > sum And sum > 359.99 Then 0)`{]&  
       point_in = True [`nY/g:  
    Else o4,fwPkB  
       point_in = False YjN2 ,Xi  
    End If wYQTG*&h  
End Function

'得到点半径,得到交点坐标函数 MG)wVS<d_  
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() Pj9n`LwM  
    '求得中心点坐标 Kk#g(YgNz  
Dim tt As String tgXIj5z  
Dim rt(3) As Single hbRDM'  
    '判断是否平行 #va|&QBZxM  
   acx = p3x - p1x rqbX9M^  
   acy = p3y - p1y 8 #fzL7  
   bdx = p4x - p2x =<mpZ'9gW  
   bdy = p4y - p2y ^HYmi\`  
   If acx * bdy = acy * bdx Then /z:pid,_0  
      rt(0) = 0 b*Ny  
      Exit Function GWo^hIfJ  
   Else 'zCJ
K~x`x  
      '判断斜率存在否 "D0:Y(\  
      If p1x = p3x And p2x <> p4x Then n!=%MgF'*p  
         tt = "ac_n_bd_y" [5K&J-W  
      ElseIf p1x <> p3x And p2x = p4x Then e=K2]Y Q{  
         tt = "ac_y_bd_n" 1-[~}  
      ElseIf p1x <> p3x And p2x <> p4x Then H%
N!;Jz=  
         tt = "ac_y_bd_y" L".Qf|b*  
      End If ,FRFH8p  
    Select Case tt #eSVFD5ZU  
         Case "ac_n_bd_y" EOJk7  
            'bd线段方程 3]xe7F'`  
            k_bd = bdy / bdx NX7(;02  
            b_bd = p2y - k_bd * p2x fDyFkhc  
            p_x = p1x &2IrST{d:V  
            p_y = k_bd * p_x + b_bd P'f0KZL;  
         Case "ac_y_bd_n" Tdtn-  
            'ac线段方程 2,,zN-9mt  
            k_ac = acy / acx uim4,Zm{  
            b_ac = p1y - k_ac * p1x ^.bYLF  
            p_x = p2x "#bL/b'{  
            p_y = k_ac * p_x + b_ac C"l_78  
        Case "ac_y_bd_y" RDU,yTHq  
           'ac，bd线段都要求 _~!*|<A_  
           k_ac = acy / acx 3`sM/BoA  
           b_ac = p1y - k_ac * p1x vlYDhjZk#  
           k_bd = bdy / bdx f1GV6/| m  
           b_bd = p2y - k_bd * p2x
c@u)m}V  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) hnWo.5;$  
           p_y = k_ac * p_x + b_ac *zoAD|0N  
        End Select wn*<.s  
      rt(1) = p_x B.wihJVDg  
      rt(2) = p_y ;#c|ZnX  
     R^zTgyr  
'计算最大半径 C =fs[  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) "0x"Xw#I  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) v&g(6~b_>  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) *p!K9$4  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 3/a$oO
 
Dim bb(5) As Single 3&Dln  
  bb(1) = rr1 v_Om3i9$E  
  bb(2) = rr2 tln*Baq  
  bb(3) = rr3 &8!*u3  
  bb(4) = rr4 Z9-HQ5>  
  nb = rr1 +$i-"^  
For i = 1 To 4 W[S4s/)mg  
    If nb <= bb(i) Then tBEZ4 W>67  
       nb = bb(i) >XzCHtEP  
    End If =6j4_+5mnH  
Next i O8BxXa@5  
    rt(0) = Sqr(nb) "0Xa?z8"  
    rr = rt() gb 6 gIFq;  
  End If fdr.'aMf%  
         v~-z["=}!  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  l'-dB  

*EOIgQp  
有热压工艺方面的人才或者资料分享下； }S'+Ytea  
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 m<005_Z0Q  

高手真多！

楼主威武霸气.