[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： 8C~]
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关键点说几个： /&{$ pM|?  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ,NVsn  
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 q^L<X)  
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 %\r!7@Q  

以下是几个重要的函数： >P $;79<  
1.判断点在区域中函数
0,rTdjH7  
2.计算夹角函数 njnDW~Snb  
3.转置函数 1YJC{bO  
4.得到区域中心点，及区域半径函数 z2hc.29t  
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） @%
lBrM  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 /q$,'^.A  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single t 6^l`6:p  
   cax = x2 - x1 {]]|5 \F  
   cay = y2 - y1 U(;&(W"M  
   cbx = x2 - x3 [kgdv6E  
   cby = y2 - y3 H'UR8%  
   mo_jj = cax * cbx + cay * cby 'EfR|7m  
   mo_ca = Sqr(cax * cax + cay * cay) _ _>.,gL7  
   mo_cb = Sqr(cbx * cbx + cby * cby) |xvy')(b  
   cos_acb = mo_jj / (mo_ca * mo_cb) W$Yc'E ;  
   'ff_cos = cos_acb PeE/iZ.  
   If cos_acb >= 1 Then ~w;]c_{.b  
   nn = 0 uH;-z_Wpn!  
   ElseIf cos_acb <= -1 Then _:B1_rz7,  
   nn = 3.14159265258979 u}|%@=xn  
   Else 2JS`Wqy  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) awUx=%ERtA  
   End If *8tI*Pus  
   'ff_angle = nn \S)2  
   ff_angle = nn * 180 / 3.14159265258979 I;?X f  
End Function

'判断点在区域内函数 &X]\)`j0  
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 DK&h eVIoZ  
Dim aob, boc, cod, doa, sum As Single mG1IQ!  
  If ppx = p1x And ppy = p1y Then ;|cTHGxbE  
     point_in = True ^U8
r0]9  
     Exit Function N=)z  
  End If xyE1Gw`V  
  If ppx = p2x And ppy = p2y Then h`}3h< 8  
     point_in = True -sMytHH.  
     Exit Function iYbX  
  End If @E53JKYhY  
   If ppx = p3x And ppy = p3y Then S-nlr@w8  
     point_in = True ='E$-_  
     Exit Function =)OC|?9C\  
  End If T^}  
     /+3a n9h  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ._96*r=o  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) <vbIp&  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y)
6dEyv99  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) +/+P\O  
    sum = aob + boc + cod + doa S|GWcSg  
    If 360.01 > sum And sum > 359.99 Then ;bX4(CMe &  
       point_in = True +tN&a  
    Else e[t<<u3"  
       point_in = False VRW]a  
    End If H_IGFZCh  
End Function

'得到点半径,得到交点坐标函数 g9my=gY  
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() IGAzE(  
    '求得中心点坐标 em]xtya  
Dim tt As String DjW$?>  
Dim rt(3) As Single qU[O1bN  
    '判断是否平行 c~dM`2J,  
   acx = p3x - p1x '?Iif#Z1  
   acy = p3y - p1y IdM*5Y>f  
   bdx = p4x - p2x " B@jfa%  
   bdy = p4y - p2y czBi Dk4  
   If acx * bdy = acy * bdx Then Pcu|k/tk  
      rt(0) = 0 ]R_G{%  
      Exit Function S9Yt1qb  
   Else px9>:t[P  
      '判断斜率存在否 j:1uP^.  
      If p1x = p3x And p2x <> p4x Then | D.C!/69  
         tt = "ac_n_bd_y" n!N\zx8  
      ElseIf p1x <> p3x And p2x = p4x Then ;~sr$6  
         tt = "ac_y_bd_n" wh~sZ  
      ElseIf p1x <> p3x And p2x <> p4x Then N)43
};e  
         tt = "ac_y_bd_y" "6I[4U"@  
      End If s=EiH  
    Select Case tt hE!7RM+Y  
         Case "ac_n_bd_y" GF--riyfB  
            'bd线段方程 iG[? ]]  
            k_bd = bdy / bdx F1A1@{8bN  
            b_bd = p2y - k_bd * p2x ->yeJTsE9  
            p_x = p1x @PcCiGZ  
            p_y = k_bd * p_x + b_bd Qp!Y.YnPd_  
         Case "ac_y_bd_n" Xi~9&ed#$i  
            'ac线段方程 ~/`X*n&  
            k_ac = acy / acx 4-:7.I(hq  
            b_ac = p1y - k_ac * p1x C;sgK
 
            p_x = p2x =wA5P@  
            p_y = k_ac * p_x + b_ac [{PqV):p  
        Case "ac_y_bd_y" !z=pP$81  
           'ac，bd线段都要求 O2H/rFx4  
           k_ac = acy / acx "oE*9J?e  
           b_ac = p1y - k_ac * p1x p~bkf>  
           k_bd = bdy / bdx i;lE
5  
           b_bd = p2y - k_bd * p2x *:arva5  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) $au2%NL  
           p_y = k_ac * p_x + b_ac XN;/nU  
        End Select ]M4NpUM  
      rt(1) = p_x kQ}s/*  
      rt(2) = p_y if@W ]%  
     org*z!;.   
'计算最大半径 z`'P>.x   
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) yzc pG6,  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) I>((o`  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) t&"5dM\  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Wg1tip8s  
Dim bb(5) As Single uJPH~mdW  
  bb(1) = rr1 %\yK5V5  
  bb(2) = rr2
"3t\em!  
  bb(3) = rr3 Gj`f--2GE  
  bb(4) = rr4 #^\}xn"[  
  nb = rr1 #'NY}6cb$  
For i = 1 To 4 .S|-4}G(6  
    If nb <= bb(i) Then ;Prg'R[o;  
       nb = bb(i) 5<r)+?!n  
    End If &PWf:y{R`  
Next i |+/$ g.  
    rt(0) = Sqr(nb) cMtJy"kK  
    rr = rt() |E|T%i^}./  
  End If f%1wMOzx  
         B*Cb6'Q  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  DwTi_8m;  

Sq.9-h%5  
有热压工艺方面的人才或者资料分享下； ?!_u,sT  
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 dV$3u"9  

高手真多！

楼主威武霸气.