[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： q\q=PB6r  
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关键点说几个： mCz,2K|^~  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） _oB_YL;,*  
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 DS2)@  
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 oR~e#<$;  

以下是几个重要的函数： Q*YYTmZ  
1.判断点在区域中函数 \@~UDP]7  
2.计算夹角函数 vMs;>lhtg  
3.转置函数 /:\3 \{?0m  
4.得到区域中心点，及区域半径函数 Vi]c%*k  
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） @+Y8*Rj\3  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 nW+YOX|+  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 6S.~s6o,  
   cax = x2 - x1 ~/IexQB&  
   cay = y2 - y1 &*&?0ov^"  
   cbx = x2 - x3 "Jy
~PcJZ1  
   cby = y2 - y3 [<wbbvXR  
   mo_jj = cax * cbx + cay * cby =C f(B<u  
   mo_ca = Sqr(cax * cax + cay * cay) me\cLFw  
   mo_cb = Sqr(cbx * cbx + cby * cby) &kQ!KA28  
   cos_acb = mo_jj / (mo_ca * mo_cb) Ra3ukY

G[  
   'ff_cos = cos_acb 8@M'[jT  
   If cos_acb >= 1 Then m=b~i^@  
   nn = 0 A%vsno!  
   ElseIf cos_acb <= -1 Then bO<0qM~  
   nn = 3.14159265258979 !]S=z^"<  
   Else S*)o)34U  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) i_F$&?)  
   End If l9/:FiJ_  
   'ff_angle = nn 1Qh`6Ya f  
   ff_angle = nn * 180 / 3.14159265258979 K`nJVc  
End Function

'判断点在区域内函数 gvnj&h.GV  
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 m1.B\~S3  
Dim aob, boc, cod, doa, sum As Single 3ViM ?p  
  If ppx = p1x And ppy = p1y Then yty`2$O  
     point_in = True (BERY  
     Exit Function %{STz  
  End If * Zd_ HJi  
  If ppx = p2x And ppy = p2y Then K!b8= K`  
     point_in = True Sue 6+p  
     Exit Function 2z983^  
  End If F$*3@Y  
   If ppx = p3x And ppy = p3y Then *`KrVu 6s  
     point_in = True Yjup  
     Exit Function =w<VT%  
  End If *?8RXer  
     Q
#WE|,a  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 3 Lje<KzL  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) w3#`1T`N  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y)  #[ :w  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) s#lto0b"8  
    sum = aob + boc + cod + doa 'XTs -=  
    If 360.01 > sum And sum > 359.99 Then iMWW%@U^=  
       point_in = True m4gU*?  
    Else 8U^D(jrz  
       point_in = False p`GWhI?  
    End If Zu=kT}aGg  
End Function

'得到点半径,得到交点坐标函数 rBevVc![  
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() E0`[G]*G  
    '求得中心点坐标 k6J\Kkk(  
Dim tt As String y#bK,}  
Dim rt(3) As Single 8&T,LNZoY  
    '判断是否平行 W^(Iw%ek  
   acx = p3x - p1x ?48AY6  
   acy = p3y - p1y "=ElCaP}  
   bdx = p4x - p2x l7Y8b`  
   bdy = p4y - p2y u 6(GM  
   If acx * bdy = acy * bdx Then va>"#;37  
      rt(0) = 0 S*rO0s:  
      Exit Function 3`rIV*&_{  
   Else HZuiVW8  
      '判断斜率存在否 Bhx<g&|j  
      If p1x = p3x And p2x <> p4x Then gV.f*E1C  
         tt = "ac_n_bd_y" 1uC;$Aj6:  
      ElseIf p1x <> p3x And p2x = p4x Then #gI&lO*\gr  
         tt = "ac_y_bd_n" IM$0#2\  
      ElseIf p1x <> p3x And p2x <> p4x Then WQ.i$ID/  
         tt = "ac_y_bd_y" ^
vn\4  
      End If ?C~X@sq  
    Select Case tt hA5,w_G/  
         Case "ac_n_bd_y" /4H[4m]I  
            'bd线段方程 :K;T Q  
            k_bd = bdy / bdx p6[#f96^u  
            b_bd = p2y - k_bd * p2x >3+FZ@.iT  
            p_x = p1x U,38qKE  
            p_y = k_bd * p_x + b_bd bHJoEYY^  
         Case "ac_y_bd_n" H1C%o0CPY  
            'ac线段方程 !Z-9tYO  
            k_ac = acy / acx HNFhH0+^  
            b_ac = p1y - k_ac * p1x X [!X>w&z|  
            p_x = p2x W'V@  
            p_y = k_ac * p_x + b_ac 1wb
Tqc  
        Case "ac_y_bd_y" E+Im~=m$  
           'ac，bd线段都要求 %GS\1 Q%  
           k_ac = acy / acx ~z>BfL  
           b_ac = p1y - k_ac * p1x HlF}   
           k_bd = bdy / bdx 8Yxhd .  
           b_bd = p2y - k_bd * p2x }<.7xz|V  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) $mD>rx  
           p_y = k_ac * p_x + b_ac 2pjW,I!`  
        End Select m'SmN{(t  
      rt(1) = p_x QS5H>5M)  
      rt(2) = p_y \.kTe<.:_  
     pY,O_ t$  
'计算最大半径 2H3(HZv  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) +!Q!m 3/I  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Gxo# !  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y)  A<2I!  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 2DUr7rM  
Dim bb(5) As Single ;hkro$  
  bb(1) = rr1 Ogd8!'\  
  bb(2) = rr2 l`G(O$ct  
  bb(3) = rr3 X:R%1+&*  
  bb(4) = rr4
u\:rY)V  
  nb = rr1 *$JB`=Q  
For i = 1 To 4 )F
+nSV;  
    If nb <= bb(i) Then ,7t3>9-M"  
       nb = bb(i) ,zG<7~m  
    End If A"0wvk)UcY  
Next i jzMhJ  
    rt(0) = Sqr(nb) WBy[m ?d  
    rr = rt() v;Swo("  
  End If Lr wINVa  
         XynU/Go,  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  %T`4!:vy  

]]\)=F`n77  
有热压工艺方面的人才或者资料分享下； 4C l,Iw/;  
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 =#OHxM  

高手真多！

楼主威武霸气.