[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： DB jUHirK  
2l+'p[b0>  
(7~vOWs:[  

关键点说几个： La^Zr,T!  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） z%6egi>  
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 eEmLl(Lb  
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 1mEW]z  

以下是几个重要的函数： uMC0XE|S  
1.判断点在区域中函数 6~k qU4l
L  
2.计算夹角函数 i079 V  
3.转置函数 NXE1v~9V  
4.得到区域中心点，及区域半径函数 O#U_mgfzJ  
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） mvtuV`  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 *-_joAWTG  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single |VoYFoiQ  
   cax = x2 - x1 
,!^w  
   cay = y2 - y1 :Z5kiEwYM  
   cbx = x2 - x3 ~HgN'
#Y?  
   cby = y2 - y3 D-5~CK4`  
   mo_jj = cax * cbx + cay * cby bNz2Uo!0K  
   mo_ca = Sqr(cax * cax + cay * cay) dU"C=c(w\  
   mo_cb = Sqr(cbx * cbx + cby * cby) uFi[50  
   cos_acb = mo_jj / (mo_ca * mo_cb) ~_SVQ7P  
   'ff_cos = cos_acb n~&e>_;(.  
   If cos_acb >= 1 Then Hkj| e6  
   nn = 0 ;W#/;C _h  
   ElseIf cos_acb <= -1 Then o Bp.|8-  
   nn = 3.14159265258979 $2*&\/;-E!  
   Else }(if|skau  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ok9G9|HA  
   End If mZ t:  
   'ff_angle = nn SVyJUd_
  
   ff_angle = nn * 180 / 3.14159265258979 fm,:8%  
End Function

'判断点在区域内函数 gIXc-=Ut  
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 @-qC".CI  
Dim aob, boc, cod, doa, sum As Single Y~bGgd]T  
  If ppx = p1x And ppy = p1y Then \8X8NCM  
     point_in = True h!>NS ?X7  
     Exit Function 4&LoE~  
  End If p}swJ;S  
  If ppx = p2x And ppy = p2y Then -Qco4>Z8  
     point_in = True ]^\+B4  
     Exit Function >pl*2M&  
  End If /%GMbO_  
   If ppx = p3x And ppy = p3y Then 0<S(zva7([  
     point_in = True k-vxKrjZ/  
     Exit Function >'z
p  
  End If :`P;(h  
     IN9o$CZ:  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) @'!61'}f  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) { e%  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) H}
c, P('  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) g
BG.3\[  
    sum = aob + boc + cod + doa #TSLgV'U  
    If 360.01 > sum And sum > 359.99 Then CSooJ1Ep~'  
       point_in = True &hYjQ&n  
    Else QcQ|,lA.HI  
       point_in = False Q-N.23\1  
    End If &_E*]Sj\  
End Function

'得到点半径,得到交点坐标函数 vu.f B4  
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() Cst>'g-yB  
    '求得中心点坐标 :1>R~2  
Dim tt As String Z [5HI;  
Dim rt(3) As Single <`9:hPp0  
    '判断是否平行 #zt+U^#)  
   acx = p3x - p1x \ca4X{x  
   acy = p3y - p1y V*'9yk"
 
   bdx = p4x - p2x 4"j5@bppJ  
   bdy = p4y - p2y $P@P}%2  
   If acx * bdy = acy * bdx Then W:>RstbnMG  
      rt(0) = 0 WiviH#hF  
      Exit Function 3)g1e=\i$  
   Else lv ^=g  
      '判断斜率存在否 GW{Nc!)  
      If p1x = p3x And p2x <> p4x Then xt"/e-h}  
         tt = "ac_n_bd_y" uYMW5k_,>  
      ElseIf p1x <> p3x And p2x = p4x Then ZcO!cR&*'J  
         tt = "ac_y_bd_n" _L!"3  
      ElseIf p1x <> p3x And p2x <> p4x Then a}c(#ZLs  
         tt = "ac_y_bd_y" T+4Musu{V  
      End If 4!gyFi6$  
    Select Case tt nw5#/5xw  
         Case "ac_n_bd_y" dYV)lMJ*  
            'bd线段方程 *G~c6BZ  
            k_bd = bdy / bdx w-CuO4P  
            b_bd = p2y - k_bd * p2x }}(~'
 
            p_x = p1x km<~Hw>Z  
            p_y = k_bd * p_x + b_bd C.(ZXU7  
         Case "ac_y_bd_n" 3nK'yC  
            'ac线段方程 >uJrq""+  
            k_ac = acy / acx "3j0)  
            b_ac = p1y - k_ac * p1x FJL9
x,%6  
            p_x = p2x I@L-%#@R1  
            p_y = k_ac * p_x + b_ac $~~=SOd0  
        Case "ac_y_bd_y" \K?./*  
           'ac，bd线段都要求 {Ue6DK%  
           k_ac = acy / acx G(0bulq  
           b_ac = p1y - k_ac * p1x (%fGS
.TR  
           k_bd = bdy / bdx 4 |5ekwk  
           b_bd = p2y - k_bd * p2x P7y[9|^  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) (x$k\H  
           p_y = k_ac * p_x + b_ac 4GHIRH C%[  
        End Select WAdl@){  
      rt(1) = p_x MA-$aN_(  
      rt(2) = p_y H*\ }W  
     @g=A\2  
'计算最大半径 }5]s+m  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) X7 ZaQ .  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 6|dUz*Pr|\  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) i~FCt4  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) q2<J`G(tZ  
Dim bb(5) As Single yauP j&^R  
  bb(1) = rr1 eO9nn9lql  
  bb(2) = rr2 [a |fm*B!  
  bb(3) = rr3 F#<PFT4i  
  bb(4) = rr4 ~!nd'{{9  
  nb = rr1 .N+xpxdG,  
For i = 1 To 4 `Ys })Pl  
    If nb <= bb(i) Then Jb$z(?S  
       nb = bb(i) <NAR'{f  
    End If ?\pE#~m  
Next i S2s-TpjB<  
    rt(0) = Sqr(nb) jN<]yhqf  
    rr = rt() 2b"5/$|6  
  End If !KlSw,&=.6  
         0Its;|  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  K@~#Gdnl  

Hu7zmh5
FF  
有热压工艺方面的人才或者资料分享下； t g*[%Jf^  
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 'uzv\[  

高手真多！

楼主威武霸气.