[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： b5I 8jPj4c  
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关键点说几个： +nim47  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） b?VByJl  
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 -AU'1iRcK7  
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 ~D`R"vzw=  

以下是几个重要的函数： v6|[p  
1.判断点在区域中函数 p!)tA  
2.计算夹角函数 ' V*}d  
3.转置函数 w5rtYTI  
4.得到区域中心点，及区域半径函数 lUp%1x+  
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） KK]R@{ r  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 )56L`5#tS  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single k6Vs#K7a  
   cax = x2 - x1 b"`fS`@/MW  
   cay = y2 - y1 H!,V7R  
   cbx = x2 - x3 gkq~0/  
   cby = y2 - y3 ,?Vxcr  
   mo_jj = cax * cbx + cay * cby 3m2y<l<  
   mo_ca = Sqr(cax * cax + cay * cay) dS \n2Qb  
   mo_cb = Sqr(cbx * cbx + cby * cby) kK 5~hpv  
   cos_acb = mo_jj / (mo_ca * mo_cb) dVGcth;  
   'ff_cos = cos_acb l&"bm C:xr  
   If cos_acb >= 1 Then D+
oV( Pw,  
   nn = 0 e8egxm  
   ElseIf cos_acb <= -1 Then i.
[k"(  
   nn = 3.14159265258979 ;- Vs|X  
   Else cXN0D\%`  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 'd;aAG  
   End If V\FlKC  
   'ff_angle = nn i=M[$   
   ff_angle = nn * 180 / 3.14159265258979 3/& |Z<f  
End Function

'判断点在区域内函数 N "eK9>  
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 >SYOtzg%  
Dim aob, boc, cod, doa, sum As Single I<xcVY9L  
  If ppx = p1x And ppy = p1y Then KpS=oFX{}  
     point_in = True ZX{eggXl  
     Exit Function A,= R`m  
  End If T:CWxusL  
  If ppx = p2x And ppy = p2y Then ?9 `T_,  
     point_in = True |Q?$n3-f"  
     Exit Function XoMgbDC  
  End If qPhVc9D#  
   If ppx = p3x And ppy = p3y Then b Hy<`p0  
     point_in = True *S4&V<W>  
     Exit Function T).}~i;!  
  End If [
r'hX#  
     m5KLi &R  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) OU mZ|  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) fKuaom9  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) (ueH@A"9;  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) L9whgXD  
    sum = aob + boc + cod + doa +yHzp   
    If 360.01 > sum And sum > 359.99 Then Xa&:Hg<  
       point_in = True Ag1nxV1M$  
    Else v57Kr ,  
       point_in = False l?;ReK.r  
    End If :n x;~f  
End Function

'得到点半径,得到交点坐标函数 Mq6_Q07  
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() _b=})**  
    '求得中心点坐标 gJzS,g1]  
Dim tt As String 0E&XD&D  
Dim rt(3) As Single !}xRwkN  
    '判断是否平行 CR|>?9V  
   acx = p3x - p1x fK=vLcH  
   acy = p3y - p1y HlX7A1i/  
   bdx = p4x - p2x hDEZq>&  
   bdy = p4y - p2y $5>x)jr:w+  
   If acx * bdy = acy * bdx Then \z2d=
E  
      rt(0) = 0 :/NP8$~@j  
      Exit Function 6M8(KN^  
   Else |'#uV)b0@  
      '判断斜率存在否 =E8Kacu%  
      If p1x = p3x And p2x <> p4x Then H329P*P  
         tt = "ac_n_bd_y" R"PO@v  
      ElseIf p1x <> p3x And p2x = p4x Then W8!8/IZbN  
         tt = "ac_y_bd_n" 8@I.\u)0  
      ElseIf p1x <> p3x And p2x <> p4x Then 6r,zOs-I]  
         tt = "ac_y_bd_y" Szlww  
      End If )v.\4Q4  
    Select Case tt lHPhZ(Z  
         Case "ac_n_bd_y" ;!>>C0s"  
            'bd线段方程 }HZ'i;~r|9  
            k_bd = bdy / bdx /p@0Q[E  
            b_bd = p2y - k_bd * p2x VU|Cct&)  
            p_x = p1x ^#2Y4[@  
            p_y = k_bd * p_x + b_bd f<3r;F7  
         Case "ac_y_bd_n" (8j@+J  
            'ac线段方程 hM`*-+Zb  
            k_ac = acy / acx );x[1*e  
            b_ac = p1y - k_ac * p1x DRi/<  
            p_x = p2x B&H [z  
            p_y = k_ac * p_x + b_ac `3F/7$q_  
        Case "ac_y_bd_y" H0mDs7  
           'ac，bd线段都要求 e9?y0vT//  
           k_ac = acy / acx 3bB%@^<  
           b_ac = p1y - k_ac * p1x vy F(k3W  
           k_bd = bdy / bdx 'MIM_m)H  
           b_bd = p2y - k_bd * p2x !^A t{[U  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) *yA.D
?  
           p_y = k_ac * p_x + b_ac 1uhSP!b  
        End Select N&lKo}hk  
      rt(1) = p_x ZbcpE~<a  
      rt(2) = p_y 1Aa=&B2  
     u\G\KASUK%  
'计算最大半径 Z7R+'OC  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) '~'3x4B
o  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) k$} 6Qd  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) \t@|-`  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) JTB5#S4W  
Dim bb(5) As Single (*YENT}  
  bb(1) = rr1 Cqk6Igw  
  bb(2) = rr2 y<5xlN(+v  
  bb(3) = rr3 DnPV Tp(>  
  bb(4) = rr4 Q /\Hc  
  nb = rr1 5=Y\d,SS"  
For i = 1 To 4 meV RdQ  
    If nb <= bb(i) Then \>-%OcYlM  
       nb = bb(i) pF"IDC  
    End If *,DBRJ_*7  
Next i <$ Ar*<,6  
    rt(0) = Sqr(nb) c^8y/wfok  
    rr = rt() l=J
K+uZ  
  End If 'H,l\i@"  
         wA}+E)x/C  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  n9Z|69W6>  

'tp1|n/1  
有热压工艺方面的人才或者资料分享下； :0j9  
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 }}v;V*_V  

高手真多！

楼主威武霸气.