[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： qhG2j;  
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关键点说几个： (4RtoYWW  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） LkK&<z  
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 FIAmAZH}_  
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 
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以下是几个重要的函数： P.k>6T<U>  
1.判断点在区域中函数 Sfc,F8$&N  
2.计算夹角函数 EBk-qd a}  
3.转置函数 65U\;Ew  
4.得到区域中心点，及区域半径函数 2'OY,Ooe  
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） LfU? 1:Du  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 (Uu5$q(  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single .!lLj1?p  
   cax = x2 - x1 V!yBH<X  
   cay = y2 - y1 Pf?&ys6  
   cbx = x2 - x3 (|<+yQ,@>  
   cby = y2 - y3 ypemp=+(r  
   mo_jj = cax * cbx + cay * cby xX{Zh;M&[  
   mo_ca = Sqr(cax * cax + cay * cay) o@[o6.B<  
   mo_cb = Sqr(cbx * cbx + cby * cby) L})*ck
 
   cos_acb = mo_jj / (mo_ca * mo_cb) Uugq.'>  
   'ff_cos = cos_acb :J x%K  
   If cos_acb >= 1 Then *V+,X  
   nn = 0 \UM&|yk:  
   ElseIf cos_acb <= -1 Then )Spa F)N8  
   nn = 3.14159265258979 kSCpr0c  
   Else
T$<'ZC  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) GNB'.tJ:0Y  
   End If B`3z(a92S  
   'ff_angle = nn -byaV;T?"  
   ff_angle = nn * 180 / 3.14159265258979 7PUy`H,&  
End Function

'判断点在区域内函数 Fe$o*r,  
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 k 7@:e$7  
Dim aob, boc, cod, doa, sum As Single OR'e!{  
  If ppx = p1x And ppy = p1y Then I3sf
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     point_in = True MU `!sb*  
     Exit Function "A~D(1K  
  End If z^4+Un  
  If ppx = p2x And ppy = p2y Then t.O~RE  
     point_in = True _F4=+dT|  
     Exit Function yzL9Ic  
  End If  z.2UZ%:  
   If ppx = p3x And ppy = p3y Then 4 CiRh  
     point_in = True Rp:I&f$Hk/  
     Exit Function W>&*.3{
v  
  End If s,/C^E  
     UMFM.GI  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) i=rA;2>  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) *r9D+}Y(4  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) T
-7(3#&  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) i*&b@.7N  
    sum = aob + boc + cod + doa F
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    If 360.01 > sum And sum > 359.99 Then 3|)cT1ej  
       point_in = True 0lOan  
    Else )u]=^  
       point_in = False w_~tY*IwB  
    End If pj3H4yCM:  
End Function

'得到点半径,得到交点坐标函数 KRP6b:+4L  
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() 5s4x%L (~}  
    '求得中心点坐标 I?\P^f  
Dim tt As String AxO.adQE%  
Dim rt(3) As Single 2sEG#/Y=  
    '判断是否平行 !g|[A7<|  
   acx = p3x - p1x BPOT!-  
   acy = p3y - p1y Y$|KY/)H)  
   bdx = p4x - p2x 3(*vZ  
   bdy = p4y - p2y m|]"e@SF2  
   If acx * bdy = acy * bdx Then dV*9bDkM/  
      rt(0) = 0 h*Mi/\  
      Exit Function (58r9WhS  
   Else 3fYfj  
      '判断斜率存在否 }h3[QUVf%  
      If p1x = p3x And p2x <> p4x Then or7l}X  
         tt = "ac_n_bd_y" Y10  
      ElseIf p1x <> p3x And p2x = p4x Then ~0Zy$L/D  
         tt = "ac_y_bd_n" :Z83*SPc  
      ElseIf p1x <> p3x And p2x <> p4x Then !<X/_+G\  
         tt = "ac_y_bd_y" tv]9n8v  
      End If  7(o:J  
    Select Case tt 0/%RrE  
         Case "ac_n_bd_y" 9c0
  
            'bd线段方程 &,,:pL[  
            k_bd = bdy / bdx fX1Ib$v  
            b_bd = p2y - k_bd * p2x \,!Qo*vj  
            p_x = p1x VP
Vg\K{  
            p_y = k_bd * p_x + b_bd .+lx}#-#  
         Case "ac_y_bd_n" <0Gk:NB,  
            'ac线段方程 Q } 0_}W  
            k_ac = acy / acx i"4;{C{s  
            b_ac = p1y - k_ac * p1x R"z}q(O:  
            p_x = p2x yU~wZjw  
            p_y = k_ac * p_x + b_ac e_S,N0  
        Case "ac_y_bd_y" #.,LWL]  
           'ac，bd线段都要求 N~?#Qh|ZnU  
           k_ac = acy / acx "412w^5[T  
           b_ac = p1y - k_ac * p1x 6J-=6t|  
           k_bd = bdy / bdx ScT{Tb]9bt  
           b_bd = p2y - k_bd * p2x &$~irI  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) G6\`Iy68/v  
           p_y = k_ac * p_x + b_ac oGt2n:  
        End Select F"' (i  
      rt(1) = p_x `C^0YGO%  
      rt(2) = p_y 7WNUHLEt  
     I(/*pa?m{  
'计算最大半径 3A! |M5  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) q$<VLrx  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) _X{ GZJm  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) <?Z]h]C^o  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) iBKH\em/  
Dim bb(5) As Single gmiLjI  
  bb(1) = rr1 g6?5  
  bb(2) = rr2 6_;n b
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  bb(3) = rr3 m1sV~"v;  
  bb(4) = rr4 &IG*;$c!  
  nb = rr1 dTwYDV}:  
For i = 1 To 4 4 *. O%  
    If nb <= bb(i) Then ]KUeSg|  
       nb = bb(i) ))7CqN  
    End If `j 4>  
Next i ;2gO(  
    rt(0) = Sqr(nb) q5) K  
    rr = rt() L3*HgkQQ  
  End If -x!JTx[K  
         .kfx\,lgm  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  9ZuKED  

R^"mGe\LL  
有热压工艺方面的人才或者资料分享下； 8EBd`kiq  
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  %\~U>3Q  

高手真多！

楼主威武霸气.