[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|7;Zsd:  
2#@-t{\3-p  

描述:请输入描述

图片:2.jpg

Id{Ix(O  

关键点说几个： 3^]Kd  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） n!L}4Nmp  
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 oiItQ4{<  
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 1 Ay.^f  

以下是几个重要的函数： 7o9[cq w  
1.判断点在区域中函数 vq1u!SY  
2.计算夹角函数 y|(?>\jBl  
3.转置函数 %)=c#H1  
4.得到区域中心点，及区域半径函数 R2y~+tko?
 
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） O7yIFqI=/  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 |\N))K-2D  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single :)kWQQ+,  
   cax = x2 - x1 hzrS_v  
   cay = y2 - y1 /H*n(d  
   cbx = x2 - x3 #4F0o@Z  
   cby = y2 - y3 dyt.(2  
   mo_jj = cax * cbx + cay * cby Q6d>tqWhq  
   mo_ca = Sqr(cax * cax + cay * cay) B+[L/C}=;  
   mo_cb = Sqr(cbx * cbx + cby * cby) Cg]S`R-  
   cos_acb = mo_jj / (mo_ca * mo_cb) h 2C9p2.  
   'ff_cos = cos_acb =/bC0bb{i  
   If cos_acb >= 1 Then `Lr|KuFN  
   nn = 0 %Ktlez:S  
   ElseIf cos_acb <= -1 Then [ip}f4K  
   nn = 3.14159265258979 b#Vm;6BHD1  
   Else O
GPrjL+  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) #X*=oG  
   End If }kMKA.O"  
   'ff_angle = nn >(a[b@[K  
   ff_angle = nn * 180 / 3.14159265258979 tF!-}{c"k  
End Function

'判断点在区域内函数 cTLW}4m%g  
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 b#:!b  
Dim aob, boc, cod, doa, sum As Single [wcp2g3Px  
  If ppx = p1x And ppy = p1y Then p~dj-w  
     point_in = True $rH}2  
     Exit Function =p&uQ6.i+  
  End If HQV#8G#B  
  If ppx = p2x And ppy = p2y Then W"1=K]B  
     point_in = True s^GE>rf  
     Exit Function c)zwyBz  
  End If pGsu#`t  
   If ppx = p3x And ppy = p3y Then }Pj;9ivz  
     point_in = True MzI
n~[\  
     Exit Function ]gmkajCzD  
  End If C^ Oy.s  
     R9InUX"k  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 5Pd^Sew  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) z=Khbh  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) z&Lcl{<MA  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) W4:#=.m  
    sum = aob + boc + cod + doa w'<"5F`  
    If 360.01 > sum And sum > 359.99 Then sF p% T4j  
       point_in = True vSGvv43G  
    Else ihopQb+k^m  
       point_in = False |\SwZTr  
    End If _[S<Cb*1  
End Function

'得到点半径,得到交点坐标函数 p$l'y""i  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() kTm>`.kKJ=  
    '求得中心点坐标 01vKx)f  
Dim tt As String OLyl.#J  
Dim rt(3) As Single Ogp@!  
    '判断是否平行 1ika'  
   acx = p3x - p1x YF<U'EVU-  
   acy = p3y - p1y y/!jC]!+c  
   bdx = p4x - p2x j~k+d$a  
   bdy = p4y - p2y L] !M1\  
   If acx * bdy = acy * bdx Then 0Y9fK? (  
      rt(0) = 0 I'%ASZ  
      Exit Function \Culf'iX  
   Else Q ;$NDYV1  
      '判断斜率存在否 )H-y  
      If p1x = p3x And p2x <> p4x Then &``nYI g/  
         tt = "ac_n_bd_y" ?m dGMf)  
      ElseIf p1x <> p3x And p2x = p4x Then #iP5@:!Wm~  
         tt = "ac_y_bd_n" O@sJ#i>  
      ElseIf p1x <> p3x And p2x <> p4x Then CL<m+dW%*  
         tt = "ac_y_bd_y" *&~wl(+O=  
      End If '+E\-X  
    Select Case tt 03a<Cd/S  
         Case "ac_n_bd_y" Gw?$.@L'I6  
            'bd线段方程 s?_H<u  
            k_bd = bdy / bdx z;6,,  
            b_bd = p2y - k_bd * p2x 70yM]C^  
            p_x = p1x Kp%:\s,lO  
            p_y = k_bd * p_x + b_bd )P #
MUC  
         Case "ac_y_bd_n" v}BXH4&Y  
            'ac线段方程 Fm
C [u  
            k_ac = acy / acx TtP2>eh-  
            b_ac = p1y - k_ac * p1x W4n(6esO  
            p_x = p2x }g_\?z3gt  
            p_y = k_ac * p_x + b_ac do=s=&T  
        Case "ac_y_bd_y" %2<u>=6byG  
           'ac，bd线段都要求 y\c-I!6>26  
           k_ac = acy / acx F]
6$4o[  
           b_ac = p1y - k_ac * p1x }+i
~JK  
           k_bd = bdy / bdx 9\KMU@Ne  
           b_bd = p2y - k_bd * p2x ~oE@y6Q  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) Pm!/#PtX  
           p_y = k_ac * p_x + b_ac oO][X  
        End Select Geyj`t  
      rt(1) = p_x C!6d`|  
      rt(2) = p_y CyD)=e{  
     <F<jx"/)  
'计算最大半径 nv_9Llh=z  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ]c\d][R N  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) @"'$e_jj"  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) DE" Y(;S  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ]]8^j='P
'  
Dim bb(5) As Single Vc$y^|=  
  bb(1) = rr1 +'!Y[7|9iv  
  bb(2) = rr2 -9~WtTaV.H  
  bb(3) = rr3 |}naI_Qudv  
  bb(4) = rr4 CCU<t Q  
  nb = rr1 ^Bu55q  
For i = 1 To 4 Ff{dOV.i  
    If nb <= bb(i) Then z 3N'Xk  
       nb = bb(i) ZOY zCc(d  
    End If zt/N)5\V  
Next i x5 ?>y{6D  
    rt(0) = Sqr(nb) D=:O^<  
    rr = rt() NH0uK  
  End If 5;q{9wvqO  
         Rxk0^d:sNi  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Z7p!YTA  

<.hutU*1  
有热压工艺方面的人才或者资料分享下； o>\o=%D.a  
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 8p_6RvG  

高手真多！

楼主威武霸气.