[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： 0c&+|>!  
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关键点说几个： h~26WLf.  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 1}37Q&2  
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 "j-CZ\]U|  
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 i!cCMh8  

以下是几个重要的函数： jtc~DL  
1.判断点在区域中函数 I|J/F}@p  
2.计算夹角函数 >MK98(F  
3.转置函数 a>)f=uS  
4.得到区域中心点，及区域半径函数 kl,3IKHa  
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） to\Ni~a&  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 <ih[TtZ  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single vI]N^j2%  
   cax = x2 - x1 }-fl$j?9E  
   cay = y2 - y1 80;(Gt@<"  
   cbx = x2 - x3 &OBkevg  
   cby = y2 - y3 Kg$Mx  
   mo_jj = cax * cbx + cay * cby - YV>j  
   mo_ca = Sqr(cax * cax + cay * cay) ETLD$=iS  
   mo_cb = Sqr(cbx * cbx + cby * cby) c(%|: P^  
   cos_acb = mo_jj / (mo_ca * mo_cb)
ipILG4  
   'ff_cos = cos_acb 1.X@;  
   If cos_acb >= 1 Then xKC[=E>z  
   nn = 0 go"Hf_  
   ElseIf cos_acb <= -1 Then JLi|Td"1%  
   nn = 3.14159265258979 `XB 9Mi=  
   Else Z/K{A`  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) n(|^SH4$b  
   End If 0^ibNiSP  
   'ff_angle = nn H.2QKws^F  
   ff_angle = nn * 180 / 3.14159265258979
0RK!/:'  
End Function

'判断点在区域内函数 +]50DxflA  
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 @vB!u[{  
Dim aob, boc, cod, doa, sum As Single )0R'(#  
  If ppx = p1x And ppy = p1y Then eIo7F m  
     point_in = True ^KELKv,_  
     Exit Function Bw{I;rW{2  
  End If 42{:G8  
  If ppx = p2x And ppy = p2y Then /SrAW`;"  
     point_in = True f`/x"@~H5  
     Exit Function F3N6{ysK#  
  End If ym6K!i]q4  
   If ppx = p3x And ppy = p3y Then j w9b)  
     point_in = True l
PJ\-/>$z  
     Exit Function <rmvcim{*  
  End If }{< '8J.R  
     .%OR3"9@  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) N&V`K0FU  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) [=_jYzD,j|  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 4,0{7MLgK  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) xp9pl[l  
    sum = aob + boc + cod + doa s!e3|pGS  
    If 360.01 > sum And sum > 359.99 Then  65m"J'  
       point_in = True N"y)Oca{  
    Else gGS=cdl
V  
       point_in = False k: ;WtBC6j  
    End If pO.2<  
End Function

'得到点半径,得到交点坐标函数 !7&5` q7  
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() 63~ E#Dt4  
    '求得中心点坐标 ED& `_h7?  
Dim tt As String @jlw_ob2g  
Dim rt(3) As Single c\V7i#u[d;  
    '判断是否平行 uc"P3,M  
   acx = p3x - p1x 'oC) NpnH  
   acy = p3y - p1y wIBO ^w\
J  
   bdx = p4x - p2x wuJ4kW$  
   bdy = p4y - p2y SG4%}wn%  
   If acx * bdy = acy * bdx Then M[112%[+4  
      rt(0) = 0 dmN&+t  
      Exit Function ~<OSYb  
   Else Ezv Y"T@  
      '判断斜率存在否 mju>>
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      If p1x = p3x And p2x <> p4x Then &q|K!5[k  
         tt = "ac_n_bd_y" MO <3"@/,  
      ElseIf p1x <> p3x And p2x = p4x Then yqiq,=OvP  
         tt = "ac_y_bd_n" *GN# r11d  
      ElseIf p1x <> p3x And p2x <> p4x Then J{&H+rd  
         tt = "ac_y_bd_y" }k G9!sf  
      End If m<q
JcZk  
    Select Case tt {3{"8-18  
         Case "ac_n_bd_y" klR|6u]%  
            'bd线段方程 f
! .<$ih  
            k_bd = bdy / bdx ^_5r<{7/ :  
            b_bd = p2y - k_bd * p2x hzbw>g+  
            p_x = p1x Y,e B|  
            p_y = k_bd * p_x + b_bd h@WhNk7"xa  
         Case "ac_y_bd_n" }t1a*z  
            'ac线段方程 nSAdCJ;4  
            k_ac = acy / acx Y<ql49-X  
            b_ac = p1y - k_ac * p1x M6-&R=78K  
            p_x = p2x yU}
qOgXx  
            p_y = k_ac * p_x + b_ac %zw1}|s#z  
        Case "ac_y_bd_y" ["e3Ez  
           'ac，bd线段都要求 1!T1Y,w  
           k_ac = acy / acx 0f>5(ek  
           b_ac = p1y - k_ac * p1x "E?2xf|.  
           k_bd = bdy / bdx pK'V9fD5J  
           b_bd = p2y - k_bd * p2x oW Nh@C  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ;<2G  
           p_y = k_ac * p_x + b_ac M8b;d}XL  
        End Select } c}_<#I  
      rt(1) = p_x EJ:%}HhA  
      rt(2) = p_y pWsDzb6?%  
     &<U0ZvrsH  
'计算最大半径 c[1oww  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) zXxT%ZcCj  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) -kwXvYu\  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 6s/&BR  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) qF-@V25P  
Dim bb(5) As Single X;c'[q  
  bb(1) = rr1 ^ tg<K  
  bb(2) = rr2 spPNr  
  bb(3) = rr3 5m(^W[u `  
  bb(4) = rr4 /j|G(vt5  
  nb = rr1 FXN/Yq  
For i = 1 To 4 hP)LY=-2  
    If nb <= bb(i) Then qd)/9*|Jl  
       nb = bb(i) Hi1JLW,  
    End If zSja/yq  
Next i "Yj'oE%\  
    rt(0) = Sqr(nb) 4 bH^":i(  
    rr = rt() bNNr]h8y-  
  End If V<uR>TD(  
         i||]V*5n  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  2hkRd>)&
5  

i9A+
gtd  
有热压工艺方面的人才或者资料分享下； MLWM&cFG
 
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 #=f?0UTA  

高手真多！

楼主威武霸气.