[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： c4ZuW_&:  
zldfRo\wl  
Bg 7j5  

关键点说几个： VxkCK02k  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） i}/e}s<-6  
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 |+Hp+9J  
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 V-KL%  

以下是几个重要的函数： C5O5S:|'  
1.判断点在区域中函数 csH2_+uG  
2.计算夹角函数 FAQr~G}  
3.转置函数 hpbwZ  
4.得到区域中心点，及区域半径函数 !dU9sB2  
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） :a_BD  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 x(L(l=^"  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single e]lJqC  
   cax = x2 - x1 !ZFr7Xz  
   cay = y2 - y1 =43I1&_   
   cbx = x2 - x3 ""co6qo#>  
   cby = y2 - y3 ')B =|T)  
   mo_jj = cax * cbx + cay * cby +7,8w  
   mo_ca = Sqr(cax * cax + cay * cay) zVSx$6eiU  
   mo_cb = Sqr(cbx * cbx + cby * cby) 6cJ<9i &  
   cos_acb = mo_jj / (mo_ca * mo_cb) yL0f1nS  
   'ff_cos = cos_acb 5L8&/EN9-  
   If cos_acb >= 1 Then _ Yfmxn8V  
   nn = 0 4&Byl85q  
   ElseIf cos_acb <= -1 Then g>so R&*  
   nn = 3.14159265258979 G6ayMw]OF  
   Else l , ..5   
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) QV7,G9  
   End If P0^c?s"I  
   'ff_angle = nn -<_QF82  
   ff_angle = nn * 180 / 3.14159265258979 S}[l*7  
End Function

'判断点在区域内函数 l3.  
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 we3tx{j  
Dim aob, boc, cod, doa, sum As Single .u l 53 m  
  If ppx = p1x And ppy = p1y Then yub{8f;v  
     point_in = True mzWP8Hlw  
     Exit Function }Dn^d}?s||  
  End If Y25^]ON*\^  
  If ppx = p2x And ppy = p2y Then `H>b5  
     point_in = True l4rMk^>>  
     Exit Function xACdZB(  
  End If #EDEYEW7  
   If ppx = p3x And ppy = p3y Then u)a'  
     point_in = True UUeB;'E+  
     Exit Function B:< ]Hl$  
  End If 'cV?i&;  
     aBhV3Fd[B  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) kZLMtj-   
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) U3E
&n1AA  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) !nd*W"_gQ/  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) >O#grDXb  
    sum = aob + boc + cod + doa Tkw;pb  
    If 360.01 > sum And sum > 359.99 Then oKA&An  
       point_in = True ZtK\HDdp  
    Else *FK`&(B+}  
       point_in = False 87V1#U^  
    End If \=;uu_
v$  
End Function

'得到点半径,得到交点坐标函数 c3)C{9T](  
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() cK@jmGj+  
    '求得中心点坐标 h5"Ov,K3[  
Dim tt As String j}:~5|.  
Dim rt(3) As Single x[Im%k  
    '判断是否平行 k`\R+WK$  
   acx = p3x - p1x >\2:
\wI  
   acy = p3y - p1y [8XLK4e  
   bdx = p4x - p2x ; A,#;
%j  
   bdy = p4y - p2y JWv{=_2w  
   If acx * bdy = acy * bdx Then >9H@|[C  
      rt(0) = 0 ;`dh fcU  
      Exit Function t*G/]  
   Else VsK>6S\T  
      '判断斜率存在否 47r&8C+&\  
      If p1x = p3x And p2x <> p4x Then y "w|g~x]c  
         tt = "ac_n_bd_y" +GF#?X0^  
      ElseIf p1x <> p3x And p2x = p4x Then
aG+j9Q_  
         tt = "ac_y_bd_n" I.'b'-
^  
      ElseIf p1x <> p3x And p2x <> p4x Then -nbMTY}  
         tt = "ac_y_bd_y" p|+B3  
      End If F_;DN: {  
    Select Case tt ,=QM#l]  
         Case "ac_n_bd_y" e>}}:Ud  
            'bd线段方程 !#2=\LUC  
            k_bd = bdy / bdx 0aI;\D*Ts  
            b_bd = p2y - k_bd * p2x g(C|!}ex/  
            p_x = p1x ~utJB 'gr  
            p_y = k_bd * p_x + b_bd `J0i.0p  
         Case "ac_y_bd_n" CO:u1?  
            'ac线段方程 Bux [6O%  
            k_ac = acy / acx V9wI\0  
            b_ac = p1y - k_ac * p1x %+)
o'nf"U  
            p_x = p2x uC3:7  
            p_y = k_ac * p_x + b_ac L!Cz'm"Nl  
        Case "ac_y_bd_y" ^].jH+7i*  
           'ac，bd线段都要求 DZS]AC*  
           k_ac = acy / acx iRV~Il#~!  
           b_ac = p1y - k_ac * p1x .|qK+Hnc  
           k_bd = bdy / bdx <A5]]{9 +  
           b_bd = p2y - k_bd * p2x H)w(q^i  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) >EsziRm  
           p_y = k_ac * p_x + b_ac fBn"kr;  
        End Select hU]HTX'R  
      rt(1) = p_x DQ#H,\^<  
      rt(2) = p_y ;< jbLhHwD  
     $~0Q@):  
'计算最大半径 4+$b~u  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) U9y|>P\)T  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) /cr}N%HZB  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) D]a:@x`+Bz  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) N,dT3we  
Dim bb(5) As Single WEg6Kz  
  bb(1) = rr1 3.d"
rl  
  bb(2) = rr2 \c v?^AI  
  bb(3) = rr3 6lwta`2  
  bb(4) = rr4 D4Al3fe  
  nb = rr1 =]`lN-rYw  
For i = 1 To 4 }v9\F-0>Q  
    If nb <= bb(i) Then w%AcG~`j!B  
       nb = bb(i) T<3BT  
    End If 9E2j!  
Next i >(w2GD?  
    rt(0) = Sqr(nb) le+R16Z
 
    rr = rt() 5!YA o\S  
  End If n<sd!xmqFx  
         Zv11uH-C  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  1ygpp0IGJ  

iU6Gp-<M,  
有热压工艺方面的人才或者资料分享下； 8|E'>+ D_-  
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 e><5Pr
)  

高手真多！

楼主威武霸气.