[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： /Wqx@#  
*gxo!F}  
i8Y$cac!  

关键点说几个： =:;KYuTr  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ;C+g)BW  
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 s?2DLXv}!  
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 uv,_?x\'  

以下是几个重要的函数： p`i_s(u  
1.判断点在区域中函数 kK]^q|vb6  
2.计算夹角函数 JvZNr?_w%  
3.转置函数 bBFdr  
4.得到区域中心点，及区域半径函数 :gNTQZR  
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） 4&+;n[D  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 +Y^_1  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single y'9 bs  
   cax = x2 - x1 a09]5>*  
   cay = y2 - y1 'e3[m  
   cbx = x2 - x3 ~\9bh6%R  
   cby = y2 - y3 3']yjj(gHr  
   mo_jj = cax * cbx + cay * cby !U@?Va~Zn  
   mo_ca = Sqr(cax * cax + cay * cay) l9J]<gG  
   mo_cb = Sqr(cbx * cbx + cby * cby) T|h/n\fx)a  
   cos_acb = mo_jj / (mo_ca * mo_cb) S'I{'jP5  
   'ff_cos = cos_acb {ER%r'(4Z  
   If cos_acb >= 1 Then 8qEK6-  
   nn = 0 jZm57{C#*?  
   ElseIf cos_acb <= -1 Then j]#-DIL  
   nn = 3.14159265258979 ?T\m V}  
   Else [S}o[v\  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) B@,L83  
   End If WheJ 7~  
   'ff_angle = nn ?Afx{
H7  
   ff_angle = nn * 180 / 3.14159265258979 +M+ht  
End Function

'判断点在区域内函数 $lj1924?^  
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 QY<{S&k9  
Dim aob, boc, cod, doa, sum As Single UQwLAXs  
  If ppx = p1x And ppy = p1y Then ^AWM/aY  
     point_in = True =H_|007C  
     Exit Function rNL*(PN}lO  
  End If ELp @/c=Wr  
  If ppx = p2x And ppy = p2y Then $vS`w4Y  
     point_in = True BfLh%XC  
     Exit Function =o5ZcC  
  End If .)W'{2J-  
   If ppx = p3x And ppy = p3y Then "+js7U-  
     point_in = True "YlN_U  
     Exit Function 1;p'2-x  
  End If 4c2*)x$@  
     .[1"Med J  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ~M 6^%  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) &Bbs\ ;  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) -WIT0F4o;  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ^ ~HV`s  
    sum = aob + boc + cod + doa DRLX0Ml]\  
    If 360.01 > sum And sum > 359.99 Then 2\ /(
!n  
       point_in = True taXS>*|B  
    Else g?ID}E~<  
       point_in = False S~+}_$  
    End If W@w#A]  
End Function

'得到点半径,得到交点坐标函数 KaC+x-%K  
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() H4 }^6><V  
    '求得中心点坐标 jb8v3L  
Dim tt As String 1}mIzrY  
Dim rt(3) As Single $-m`LF@  
    '判断是否平行 "Y9 *rL  
   acx = p3x - p1x F4i c^F{K  
   acy = p3y - p1y `Td
0R!  
   bdx = p4x - p2x d#.9!m~.  
   bdy = p4y - p2y |q5R5m
Q  
   If acx * bdy = acy * bdx Then Kw}-<y  
      rt(0) = 0 xI}h{AF7  
      Exit Function UBp0;)-  
   Else )/h~csy:~  
      '判断斜率存在否 [ZS}P  
      If p1x = p3x And p2x <> p4x Then <U=
:N~L  
         tt = "ac_n_bd_y" F{\MIuoy  
      ElseIf p1x <> p3x And p2x = p4x Then WRQJ6B  
         tt = "ac_y_bd_n" }tT"vCu  
      ElseIf p1x <> p3x And p2x <> p4x Then ba^cw}5  
         tt = "ac_y_bd_y" 3k;*xjv6@  
      End If <4,>`#NEo  
    Select Case tt yw`xK2(C$  
         Case "ac_n_bd_y" lL~T@+J~  
            'bd线段方程 w?A&XB+  
            k_bd = bdy / bdx !L"3Otd  
            b_bd = p2y - k_bd * p2x c6cGl]FL  
            p_x = p1x 2~+_T  
            p_y = k_bd * p_x + b_bd r#wMd9])  
         Case "ac_y_bd_n" 0n+Wv@/  
            'ac线段方程 +Gi~VW.  
            k_ac = acy / acx ygr[5Tl  
            b_ac = p1y - k_ac * p1x Q*mzfsgr  
            p_x = p2x OwrzD~  
            p_y = k_ac * p_x + b_ac Ob2H7!  
        Case "ac_y_bd_y" y\b.0-z  
           'ac，bd线段都要求 T<06y3sN  
           k_ac = acy / acx .vG_\-@  
           b_ac = p1y - k_ac * p1x pb_+_(/c  
           k_bd = bdy / bdx IC>OxYg*  
           b_bd = p2y - k_bd * p2x gT*0WgB  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ce&)djC7U  
           p_y = k_ac * p_x + b_ac E~]8>U?V  
        End Select 4
lH$BIAW  
      rt(1) = p_x K:fK!/  
      rt(2) = p_y >I AwNr  
     $QmP' <  
'计算最大半径 e!
b?SmNN  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ?J,hv'L]  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 0f/=C9L  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) l@nkR&4[  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) TLzg*  
Dim bb(5) As Single v:(_-8:F  
  bb(1) = rr1 N7k<q=r-  
  bb(2) = rr2 w~QUG^0Fx  
  bb(3) = rr3 O/$pT%D1x  
  bb(4) = rr4 rxjMCMF  
  nb = rr1 n.p6+^ES  
For i = 1 To 4 ZurQr}  
    If nb <= bb(i) Then ]kx)/n-K  
       nb = bb(i) )e|Cd} 2  
    End If I{AteL  
Next i LF?83P,UJ#  
    rt(0) = Sqr(nb) aPaGnP:^  
    rr = rt() *_}|EuY  
  End If g2.%x\d  
         RRig  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  s.+2[R1HF  

Y,K): ~T  
有热压工艺方面的人才或者资料分享下； D7cOEL<  
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 %\#s@8=2u  

高手真多！

楼主威武霸气.