[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： $4jell  
zF4
[}*  

描述:请输入描述

图片:2.jpg

OdMO=Hy6d  

关键点说几个： %7Kooq(i  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ,_!6U  
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 cYNJhGY  
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 VC5_v62&.  

以下是几个重要的函数： 4 ;Qlu  
1.判断点在区域中函数 wLuv6\E  
2.计算夹角函数 XwM611  
3.转置函数 Ql?^ B SqG  
4.得到区域中心点，及区域半径函数 A`O<6   
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） dsK&U\ej}  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ^[TV;9I*  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ?_6YtR,{  
   cax = x2 - x1 2k7bK6=nm  
   cay = y2 - y1 _BnTv$.P  
   cbx = x2 - x3 9-*NW0  
   cby = y2 - y3 YHxbDf dA  
   mo_jj = cax * cbx + cay * cby ]pTvMom$6  
   mo_ca = Sqr(cax * cax + cay * cay) Hr;h4J  
   mo_cb = Sqr(cbx * cbx + cby * cby) S_J :&9L  
   cos_acb = mo_jj / (mo_ca * mo_cb) z?8~[h{i%  
   'ff_cos = cos_acb ScnY3&rc  
   If cos_acb >= 1 Then (J:dK=O@Z  
   nn = 0 f<[jwhCWV  
   ElseIf cos_acb <= -1 Then jigs
6#  
   nn = 3.14159265258979 OVoO6F]  
   Else HgJb4Fi  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) !7H6i#g*  
   End If O^{1RV3:,T  
   'ff_angle = nn V7CoZnz  
   ff_angle = nn * 180 / 3.14159265258979 (VHND%7P  
End Function

'判断点在区域内函数 u'9gVU B  
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 [p;*r)f2}
 
Dim aob, boc, cod, doa, sum As Single Yt1mB[&f^  
  If ppx = p1x And ppy = p1y Then #JNy  
     point_in = True Uf,fX/:!  
     Exit Function H;vZm[\0N-  
  End If Z-Wfcnk  
  If ppx = p2x And ppy = p2y Then =v2%Vs\7k  
     point_in = True eO5ktEoJ  
     Exit Function cFfTYP9  
  End If vgPUIxB@  
   If ppx = p3x And ppy = p3y Then &/F_*=VE  
     point_in = True `bgb*Yaod  
     Exit Function 4!%]fg}Um  
  End If &{^eU5  
     >Gd.&flSj
 
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) w$Ux?y-L  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 'Tf9z+0;  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 9 pKm*n&  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) #a}N"*P  
    sum = aob + boc + cod + doa n E:'Zxj  
    If 360.01 > sum And sum > 359.99 Then R8sck)k'}  
       point_in = True ~Yk"Hos  
    Else q(9%^cV6  
       point_in = False r%MyR8'k]  
    End If r
ZC3\,W  
End Function

'得到点半径,得到交点坐标函数 `!Ln|_,d  
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() m#ad6 \  
    '求得中心点坐标 x`2p
r
 
Dim tt As String ]Y5dl;xrM)  
Dim rt(3) As Single kk
fCAM  
    '判断是否平行 Fzs>J&sY&  
   acx = p3x - p1x y9 uVCR
 
   acy = p3y - p1y ) hdgz$cl  
   bdx = p4x - p2x @a;sV
!S{  
   bdy = p4y - p2y hmzair3X  
   If acx * bdy = acy * bdx Then gHH&IzHF  
      rt(0) = 0 4!'1/3cY  
      Exit Function i+U51t<  
   Else GMb!Q0I8  
      '判断斜率存在否 'wE\{1~_[+  
      If p1x = p3x And p2x <> p4x Then cju@W]!  
         tt = "ac_n_bd_y" !u0U5>ccw  
      ElseIf p1x <> p3x And p2x = p4x Then Oy'0I,  
         tt = "ac_y_bd_n" a(Sv,@/  
      ElseIf p1x <> p3x And p2x <> p4x Then $~hdm$  
         tt = "ac_y_bd_y" "gg(tp45  
      End If N l|^o{#  
    Select Case tt J[+Tj@n'  
         Case "ac_n_bd_y" Jk~UEqr+  
            'bd线段方程 &Q+]t"OA!  
            k_bd = bdy / bdx #Y: ~UVV  
            b_bd = p2y - k_bd * p2x (\uAAW"  
            p_x = p1x Ns
~g+C9  
            p_y = k_bd * p_x + b_bd 5=.7\#D  
         Case "ac_y_bd_n" % &+|==-  
            'ac线段方程 8!6<p[_  
            k_ac = acy / acx g5<ZS3tQ  
            b_ac = p1y - k_ac * p1x }!knU3J  
            p_x = p2x yUj;4vd  
            p_y = k_ac * p_x + b_ac B{4"$Mi  
        Case "ac_y_bd_y" w*2^/zh  
           'ac，bd线段都要求 j,ZW[*M  
           k_ac = acy / acx -g$OOJB6  
           b_ac = p1y - k_ac * p1x Yoe les-  
           k_bd = bdy / bdx * S{\#s  
           b_bd = p2y - k_bd * p2x QS%,7'EG  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) (V^QQ !:  
           p_y = k_ac * p_x + b_ac $uTlbAuv  
        End Select S#hu2\9D,  
      rt(1) = p_x B,:23[v  
      rt(2) = p_y _we3jzMW  
     _32/WQF6  
'计算最大半径 +E)e1:8  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) :(RL8  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) FcY$k%;'Q  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) M+\rX1T  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) TA<hj[-8  
Dim bb(5) As Single L&rO6  
  bb(1) = rr1 zH'!fhcy  
  bb(2) = rr2 q>c+bo 6  
  bb(3) = rr3 JH-nvv  
  bb(4) = rr4 )*+u\x_Hx  
  nb = rr1 mnQal>0~  
For i = 1 To 4 ]&
/0  
    If nb <= bb(i) Then EqYz,%I%  
       nb = bb(i) |#!eMJ&0  
    End If $kM'  
Next i XZ!cW=bqS  
    rt(0) = Sqr(nb) |\rSa^:5  
    rr = rt() 5=Zp%[#  
  End If HI7]%<L  
         o<~-k,{5P  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  }1X11+/W  

I?^Q084  
有热压工艺方面的人才或者资料分享下； q\\8b{~  
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 1]D/3!  

高手真多！

楼主威武霸气.