[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： \+G.]|"Y  
'1Y<RD>x  
cB_pyX9Z  

关键点说几个： )nJzSN=>$  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） )\RzE[Cb  
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 r^fxyN2V  
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 Th.3j's  

以下是几个重要的函数： aIQrb  
1.判断点在区域中函数 0Ddn@!J*  
2.计算夹角函数 Lr K9F^c  
3.转置函数 yBr$ 0$  
4.得到区域中心点，及区域半径函数 GTT5<diw  
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） xWd9%,mDNR  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 EG'7}W  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single d,Hf-zJ%~  
   cax = x2 - x1 zyIza@V(  
   cay = y2 - y1 .t"n]X i  
   cbx = x2 - x3 !O 0ZD4/{4  
   cby = y2 - y3 *5ka.=Qs  
   mo_jj = cax * cbx + cay * cby v]LFZI5  
   mo_ca = Sqr(cax * cax + cay * cay) gubb .EY  
   mo_cb = Sqr(cbx * cbx + cby * cby) _Ym&UY.u#  
   cos_acb = mo_jj / (mo_ca * mo_cb) VZUZngw  
   'ff_cos = cos_acb 0S)"Q^6ny  
   If cos_acb >= 1 Then ,apd
3X%g  
   nn = 0 1C^HCIH7J  
   ElseIf cos_acb <= -1 Then Ws2prh^e(  
   nn = 3.14159265258979 /ig^7+#  
   Else },?-$eyX  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) -~QlHp&SY  
   End If |NphG|  
   'ff_angle = nn 9+WY@du+  
   ff_angle = nn * 180 / 3.14159265258979 GE/IaLo  
End Function

'判断点在区域内函数 -o!saX<  
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 XnNOj>!  
Dim aob, boc, cod, doa, sum As Single MY0[Oq cm=  
  If ppx = p1x And ppy = p1y Then LaAgoarN  
     point_in = True brpN>\  
     Exit Function "GIg|3  
  End If s5_1}KKCs  
  If ppx = p2x And ppy = p2y Then *YiD B?Si  
     point_in = True J.CZR[XF#  
     Exit Function OI;L9\MJc  
  End If
_BeX7  
   If ppx = p3x And ppy = p3y Then #/

&q  
     point_in = True W2X+NacD  
     Exit Function a8lo!e9q  
  End If bOnukbJ  
     Yc|-sEK/  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) qB`0^V  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) h:US]ZC^Z  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) <9MQ  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) I%VV4,I&pK  
    sum = aob + boc + cod + doa $yR{ZFo  
    If 360.01 > sum And sum > 359.99 Then s525`Q;  
       point_in = True //4p1^%  
    Else 0X}w[^f  
       point_in = False l")o!N?  
    End If Bt`r6v;\  
End Function

'得到点半径,得到交点坐标函数 )Sh;UW  
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() ;V
tpq3  
    '求得中心点坐标 O.m.]%URW  
Dim tt As String [;kj,j  
Dim rt(3) As Single k?@W/}Iv9  
    '判断是否平行 5"Xo
 R)  
   acx = p3x - p1x $(<*pU  
   acy = p3y - p1y EZNB`gO  
   bdx = p4x - p2x dsft=t8s  
   bdy = p4y - p2y E rRMiT  
   If acx * bdy = acy * bdx Then 4tN~UMw?  
      rt(0) = 0 {3yws4  
      Exit Function :Q%yW
%St$  
   Else h hNFp  
      '判断斜率存在否 ^LAS9K1.  
      If p1x = p3x And p2x <> p4x Then }e;p8)]Wl  
         tt = "ac_n_bd_y" c+ H)1Dfq  
      ElseIf p1x <> p3x And p2x = p4x Then F\$}8
,9  
         tt = "ac_y_bd_n" S3[oA&  
      ElseIf p1x <> p3x And p2x <> p4x Then <i`K%+<WO  
         tt = "ac_y_bd_y" rH9|JEz  
      End If ZBh@%A  
    Select Case tt +\]S<T*;  
         Case "ac_n_bd_y" 39^uLob  
            'bd线段方程 }Q,C;!'"  
            k_bd = bdy / bdx {N8rZ[Oo  
            b_bd = p2y - k_bd * p2x lVKF^-i  
            p_x = p1x >5YYij5Aj  
            p_y = k_bd * p_x + b_bd d`rDEa
 
         Case "ac_y_bd_n" vN[m5)aT  
            'ac线段方程 "nS{ ;:  
            k_ac = acy / acx cVt$#A)  
            b_ac = p1y - k_ac * p1x 9HBx[2&  
            p_x = p2x RI].LB_  
            p_y = k_ac * p_x + b_ac CX@HG)l  
        Case "ac_y_bd_y" yyYbB]D  
           'ac，bd线段都要求 1</t #r  
           k_ac = acy / acx tLGwF3e$A  
           b_ac = p1y - k_ac * p1x n$VPh/  
           k_bd = bdy / bdx Nl>
b'G96  
           b_bd = p2y - k_bd * p2x - &LZle&M  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) )fcpE,g'  
           p_y = k_ac * p_x + b_ac |kRx[UL  
        End Select ny;)+v?mN\  
      rt(1) = p_x Xv;ZAa  
      rt(2) = p_y [ZpG+VAJ8  
     t`/RcAwA  
'计算最大半径 {hp
@j#  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) "gVH;<&]  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Pxu
z {  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) oz7udY=]0  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) nT6iS}h  
Dim bb(5) As Single "Kf~`0P  
  bb(1) = rr1 CX(yrP6;  
  bb(2) = rr2 t7& GCZ  
  bb(3) = rr3 5|H(N}S_  
  bb(4) = rr4 Ib
<+m%Ac  
  nb = rr1 +]2~@=<@  
For i = 1 To 4 5^R#e(mr  
    If nb <= bb(i) Then vVRCM  
       nb = bb(i) 9n2%7dLQ*  
    End If L ~'N6  
Next i -cC(d$y  
    rt(0) = Sqr(nb) [ Sa C  
    rr = rt() q>h+Ke  
  End If d3hTz@JY  
         P<oD*C  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  4(gf!U  

K Hc+  
有热压工艺方面的人才或者资料分享下； md s\~l73  
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 Wuz~$SU  

高手真多！

楼主威武霸气.