[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： w5FIHYl6B  
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关键点说几个：
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1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 2+]5}'M  
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 \Ne`9k  
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 0uy'Py@2<  

以下是几个重要的函数： f-U zFlU  
1.判断点在区域中函数 Ou[K7-m%&  
2.计算夹角函数 ;
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3.转置函数 ?G{0{c2  
4.得到区域中心点，及区域半径函数 jCd]ENl+_  
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） H4M=&"ll}  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 XJul~"  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single \p^V~fy7rU  
   cax = x2 - x1 !Uiq3s`1T  
   cay = y2 - y1 Va!G4_OT  
   cbx = x2 - x3 n%Oi~7>  
   cby = y2 - y3 5Fydh0.  
   mo_jj = cax * cbx + cay * cby jUT`V ZK4&  
   mo_ca = Sqr(cax * cax + cay * cay) hqRC:p#9  
   mo_cb = Sqr(cbx * cbx + cby * cby) zAB= >v  
   cos_acb = mo_jj / (mo_ca * mo_cb) ?mMM{{%(.  
   'ff_cos = cos_acb lpi"@3  
   If cos_acb >= 1 Then YS3~sA  
   nn = 0 :.PA(97xb  
   ElseIf cos_acb <= -1 Then RO3LZBL  
   nn = 3.14159265258979 lpT&v;$`  
   Else bH+NRNI]  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ]9!y3"..W{  
   End If AKk=XAGW  
   'ff_angle = nn @Y0
ZW't  
   ff_angle = nn * 180 / 3.14159265258979 Q#MB=:0{  
End Function

'判断点在区域内函数 (wj:Gc  
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 2: QT`e&  
Dim aob, boc, cod, doa, sum As Single Zk`y"[J  
  If ppx = p1x And ppy = p1y Then >/ _#+,  
     point_in = True (iKJ~bJ  
     Exit Function xLed];2G  
  End If
S(@kdL  
  If ppx = p2x And ppy = p2y Then |GMo"[  
     point_in = True iM
!Ya!  
     Exit Function ")KqPD6k  
  End If V u")%(ix  
   If ppx = p3x And ppy = p3y Then s.4+5
rE  
     point_in = True A=kOSq 4Q  
     Exit Function ge`GQ>  
  End If )4rt-_t<  
     /<_!Gz.@uG  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) +-tFgXG  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) J4+WF#xI2  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) yeyDB>#Va.  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) \W=3P[gb  
    sum = aob + boc + cod + doa -sJ1q^;f@  
    If 360.01 > sum And sum > 359.99 Then =]%,&Se  
       point_in = True et5lfj  
    Else 7R:j^"I@  
       point_in = False A~xw:[zy$a  
    End If =r+K2]z,L  
End Function

'得到点半径,得到交点坐标函数 .Wt3|?\=nd  
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() mrr]{K  
    '求得中心点坐标 a0hBF4+6  
Dim tt As String q\@_L.tc[  
Dim rt(3) As Single &|Wqzdo?#  
    '判断是否平行
%}(`?  
   acx = p3x - p1x M(L6PyEa!Y  
   acy = p3y - p1y -i?gYF!G  
   bdx = p4x - p2x (rFiHv5  
   bdy = p4y - p2y S3M!"l  
   If acx * bdy = acy * bdx Then |Uics:cQC  
      rt(0) = 0 .K84"Gdx  
      Exit Function T1qbb*  
   Else s! 2[zJ19p  
      '判断斜率存在否 zg3kU65PJE  
      If p1x = p3x And p2x <> p4x Then \dJhDR  
         tt = "ac_n_bd_y" /[dMw *SRz  
      ElseIf p1x <> p3x And p2x = p4x Then d4ecF%R  
         tt = "ac_y_bd_n" ^'[QCwY~  
      ElseIf p1x <> p3x And p2x <> p4x Then rJGh3%  
         tt = "ac_y_bd_y" -+{[.U<1jk  
      End If x</4/d  
    Select Case tt mt+i0PIfj  
         Case "ac_n_bd_y" V?dwTc  
            'bd线段方程 6!>p<p"Ns  
            k_bd = bdy / bdx rO>'QZ%  
            b_bd = p2y - k_bd * p2x ="78#Wfj2  
            p_x = p1x :+6W%B  
            p_y = k_bd * p_x + b_bd K ,NmDc^  
         Case "ac_y_bd_n" ;[;WEA  
            'ac线段方程 (m
p  
            k_ac = acy / acx FBwG3x  
            b_ac = p1y - k_ac * p1x lIS`_H}  
            p_x = p2x 3F]Dh^IR9  
            p_y = k_ac * p_x + b_ac k Nc-@B  
        Case "ac_y_bd_y" Hy4;i^Ik <  
           'ac，bd线段都要求 zoi0Z  
           k_ac = acy / acx =q0V%h{  
           b_ac = p1y - k_ac * p1x }xC2~  
           k_bd = bdy / bdx ^7\kvW  
           b_bd = p2y - k_bd * p2x 1iY4|j;ahV  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) Soq#cl'll-  
           p_y = k_ac * p_x + b_ac t3<8n;'y:  
        End Select #1U>  
      rt(1) = p_x \_O#M   
      rt(2) = p_y tkZUjQIX  
     D&F{0  
'计算最大半径 R/x3+_.f  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) yVnG+R&  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) AE>W$x8P  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) F/ZFO5C%  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 4ams~  
Dim bb(5) As Single n[0u&m8  
  bb(1) = rr1 xgMh@@e  
  bb(2) = rr2 rmzzbLTu  
  bb(3) = rr3 `$Rgn3  
  bb(4) = rr4 :0:Tl/))  
  nb = rr1 ,2$<Pt;  
For i = 1 To 4 LUD.  
    If nb <= bb(i) Then m[xl)/e  
       nb = bb(i) O Ol:  
    End If :=y5713  
Next i WfaMu| L  
    rt(0) = Sqr(nb) VA[EY`8  
    rr = rt() %?+vtX  
  End If  7qyPI  
         tnobqL'  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  jdG2u p  

;SU<T^a  
有热压工艺方面的人才或者资料分享下； !6=s{V&r1  
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 1M-(d Q  

高手真多！

楼主威武霸气.