[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： tiHP?N
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Q?7:XbN  
O%R*1 P9  

关键点说几个： 1p]Z9$Y  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） DTi\ 4&41  
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 Dw-i!dq  
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 8/16<yZ  

以下是几个重要的函数： _8;)J
  
1.判断点在区域中函数 ( 8}'JvSu  
2.计算夹角函数 y7x[noGtR  
3.转置函数 #vnJJ#uI|>  
4.得到区域中心点，及区域半径函数 057$b!A-a  
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） cHO8%xu`  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Bt\z0*t=s  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single [Q+qu>&HB7  
   cax = x2 - x1 "Nx3_mQ  
   cay = y2 - y1 3-T}8VsiP  
   cbx = x2 - x3 ag \d4y6  
   cby = y2 - y3 3>I  
   mo_jj = cax * cbx + cay * cby 01P ~K|s  
   mo_ca = Sqr(cax * cax + cay * cay) QV@NA@;XZ  
   mo_cb = Sqr(cbx * cbx + cby * cby) i$Sq.NU  
   cos_acb = mo_jj / (mo_ca * mo_cb) dU4G!  
   'ff_cos = cos_acb xO<
$xx  
   If cos_acb >= 1 Then 5cza0CriJ  
   nn = 0 Qn*a#]p  
   ElseIf cos_acb <= -1 Then  t=;84lA  
   nn = 3.14159265258979 s?2DLXv}!  
   Else uv,_?x\'  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ?(!<m'jEy  
   End If /#,3JU$w  
   'ff_angle = nn J^G#x}y  
   ff_angle = nn * 180 / 3.14159265258979 nvdo
|5  
End Function

'判断点在区域内函数 /W6r{Et  
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 N{f4-i~  
Dim aob, boc, cod, doa, sum As Single >WsRCBA  
  If ppx = p1x And ppy = p1y Then E|aPkq]  
     point_in = True /<Doe SDJ|  
     Exit Function <$\En[u0  
  End If ;BR`}~m  
  If ppx = p2x And ppy = p2y Then N~%F/`Z<+  
     point_in = True mu(EmAoenQ  
     Exit Function o~*5FN}%+l  
  End If {[&_)AW6m%  
   If ppx = p3x And ppy = p3y Then / xfg4  
     point_in = True 'kD~tpZ  
     Exit Function AV0C9a/td  
  End If {cNH|  
     Uv-xP(X  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) -cjwa-9 ~  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) #\[
((y:q  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) .i7bI2^  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) _l`s}yC  
    sum = aob + boc + cod + doa @Ik@1  
    If 360.01 > sum And sum > 359.99 Then LZCz
iW  
       point_in = True k]n=7vw;  
    Else -}Jf4k#G  
       point_in = False ;!CYp;_  
    End If t^=6czk  
End Function

'得到点半径,得到交点坐标函数 O MEPF2:  
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() By t{3$  
    '求得中心点坐标 ~$0Qvyb>  
Dim tt As String ys5b34JN  
Dim rt(3) As Single X^PR];V:$  
    '判断是否平行 He4sP
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   acx = p3x - p1x ;P-xKRU!Xx  
   acy = p3y - p1y f!`,!dZgkd  
   bdx = p4x - p2x L`yyn/2>  
   bdy = p4y - p2y qp-/S^%  
   If acx * bdy = acy * bdx Then c1IK9X*  
      rt(0) = 0 mW_<c,3D.  
      Exit Function pcM'j#;  
   Else Vo%MG.IPB  
      '判断斜率存在否 oEHUb?(p  
      If p1x = p3x And p2x <> p4x Then (ia
(y(=C  
         tt = "ac_n_bd_y" FDB^JH9d  
      ElseIf p1x <> p3x And p2x = p4x Then xGQ958@  
         tt = "ac_y_bd_n" 0Ts[IHpg&E  
      ElseIf p1x <> p3x And p2x <> p4x Then !s;+6Sy  
         tt = "ac_y_bd_y" )fz)Rrr  
      End If Bv^{|w  
    Select Case tt =OIxG}*  
         Case "ac_n_bd_y" Oj#nF@U  
            'bd线段方程 3*G7H  
            k_bd = bdy / bdx 3_Su5~^  
            b_bd = p2y - k_bd * p2x _LV;q! /j  
            p_x = p1x
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            p_y = k_bd * p_x + b_bd 1.]Py"@:  
         Case "ac_y_bd_n" m8F-#?~  
            'ac线段方程 $=
f,z>j  
            k_ac = acy / acx =N,Mmz%  
            b_ac = p1y - k_ac * p1x Q:\I %o  
            p_x = p2x VJMn5v[V  
            p_y = k_ac * p_x + b_ac I=VPw5"E  
        Case "ac_y_bd_y" <_@ S@t)  
           'ac，bd线段都要求 (]Z%&>*  
           k_ac = acy / acx S1pikwB  
           b_ac = p1y - k_ac * p1x f1;Pzr  
           k_bd = bdy / bdx X I\zEXO  
           b_bd = p2y - k_bd * p2x n&=3Knbd@d  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) L$7 NT}L  
           p_y = k_ac * p_x + b_ac [-cYFdt"V  
        End Select L&F0^  
      rt(1) = p_x ^tIi;7k  
      rt(2) = p_y v\#69J5.>)  
     d18%zY>  
'计算最大半径 Nhv~f0  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) U}7a;4?  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 7WG"_A~V  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ~A+DH  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) bWK}oYB*  
Dim bb(5) As Single l6.z-Qw  
  bb(1) = rr1 f)\ =LV  
  bb(2) = rr2 F8km8lPQl  
  bb(3) = rr3 <qs>c<Vj  
  bb(4) = rr4
i~}[/^  
  nb = rr1 4,kT4_&,  
For i = 1 To 4
n%I%O
7  
    If nb <= bb(i) Then Bry\"V"'g  
       nb = bb(i) $D8eCjUm  
    End If ( Kh<qAP_n  
Next i +Sk;  
    rt(0) = Sqr(nb) `d,hP"jBc  
    rr = rt() Vd[[<  
  End If aDuO!?Cm  
         a!}.l< )  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ]0.? 1se  

R:kNAtK  
有热压工艺方面的人才或者资料分享下； \](IBI:  
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 U8kH'OD  

高手真多！

楼主威武霸气.