[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： V0{#q/q  
@` Pn<_L  
Wjq9f;  

关键点说几个： @F(e
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1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） yn ofDGAf  
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 yx`@f8Kr  
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 037\LPO  

以下是几个重要的函数： anz7ae&P'K  
1.判断点在区域中函数 Hh](n<Bs  
2.计算夹角函数 ~7}no}7  
3.转置函数 S|u5RU8*"|  
4.得到区域中心点，及区域半径函数 ZHA&gdK@  
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） EX<1hAw  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 g+.E=Ef8<4  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single c$A}mL_  
   cax = x2 - x1 N9)ERW2`*  
   cay = y2 - y1 )Knsy  
   cbx = x2 - x3 :]C\DUBo  
   cby = y2 - y3 U_B`SS  
   mo_jj = cax * cbx + cay * cby =g@hh)3wP  
   mo_ca = Sqr(cax * cax + cay * cay) ~ C_2D?  
   mo_cb = Sqr(cbx * cbx + cby * cby) SR)@'-Wd  
   cos_acb = mo_jj / (mo_ca * mo_cb) hW cM.  
   'ff_cos = cos_acb d<;XQ.Wo7  
   If cos_acb >= 1 Then S 1Ji\  
   nn = 0 QPF[D7\  
   ElseIf cos_acb <= -1 Then >yq
L  
   nn = 3.14159265258979 9>
@"W-  
   Else VHws9)  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) U`'w{~"D%  
   End If L/cbq*L  
   'ff_angle = nn Ipmr@%~  
   ff_angle = nn * 180 / 3.14159265258979 b}G +7B  
End Function

'判断点在区域内函数 AU$5"kBE  
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean *'t`;m~  
Dim aob, boc, cod, doa, sum As Single cE]kI,Fw,M  
  If ppx = p1x And ppy = p1y Then P?uKDON  
     point_in = True E0h!%/+-L  
     Exit Function <(t<gS#  
  End If p_(hM&>C  
  If ppx = p2x And ppy = p2y Then q B2#EsZ  
     point_in = True dCyQCA[  
     Exit Function nz&JG~Qfm  
  End If Z,&ywMm/G  
   If ppx = p3x And ppy = p3y Then ~5#7i_%@E}  
     point_in = True WL~`L!_. A  
     Exit Function %?$"oWmenS  
  End If %qv7;E2C  
     Mt:(w;Y  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y)  t|DYz#]  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ']NM_0  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) &Gt9a-ne  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) (^4%Fk&I-  
    sum = aob + boc + cod + doa Mf63 59  
    If 360.01 > sum And sum > 359.99 Then KKzvoc?Bt  
       point_in = True w?C\YKF7  
    Else N@>S>U8C  
       point_in = False hU{%x#8}lK  
    End If BkF[nL*|  
End Function

'得到点半径,得到交点坐标函数 ){:aGGtko  
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() a6d
KQ3D  
    '求得中心点坐标 qg/5m;U  
Dim tt As String 'Ap5
Aq  
Dim rt(3) As Single hz%IxI9  
    '判断是否平行 p rgjU  
   acx = p3x - p1x @El<"\  
   acy = p3y - p1y s|T7)PgR  
   bdx = p4x - p2x `9l\~t(M  
   bdy = p4y - p2y +IYSWR  
   If acx * bdy = acy * bdx Then `%3p.~>  
      rt(0) = 0 cG:`Zj~4  
      Exit Function #8jd,I%L  
   Else DG=Ap:sl*$  
      '判断斜率存在否 *lAdS]I  
      If p1x = p3x And p2x <> p4x Then lv*uXg.k^  
         tt = "ac_n_bd_y" tqCg<NH.!m  
      ElseIf p1x <> p3x And p2x = p4x Then m9@n  
         tt = "ac_y_bd_n" ;[ueNP%*y|  
      ElseIf p1x <> p3x And p2x <> p4x Then %LHV0u  
         tt = "ac_y_bd_y" Zd ,=  
      End If Vz]=J;`Mz  
    Select Case tt +=Wdn)T  
         Case "ac_n_bd_y" XH$|DeAFM  
            'bd线段方程 W2qQKv  
            k_bd = bdy / bdx @0,dyg<$>  
            b_bd = p2y - k_bd * p2x 1C=P#MU`  
            p_x = p1x 1o78e2B  
            p_y = k_bd * p_x + b_bd LW5ggU/  
         Case "ac_y_bd_n" D(U3zXdO  
            'ac线段方程 $4JX#lkt  
            k_ac = acy / acx ya g  
            b_ac = p1y - k_ac * p1x 9mphj)`d;#  
            p_x = p2x BrMp_M  
            p_y = k_ac * p_x + b_ac WV"QY/e3  
        Case "ac_y_bd_y" |o=ST  
           'ac，bd线段都要求 \ZWmef  
           k_ac = acy / acx 14!a)Ijl  
           b_ac = p1y - k_ac * p1x W;]UP$5l  
           k_bd = bdy / bdx 4~YQ\4h=  
           b_bd = p2y - k_bd * p2x SLOYlRGCi  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) P3ev4DL  
           p_y = k_ac * p_x + b_ac x~Ly$A2p  
        End Select _XNR um4  
      rt(1) = p_x A<X :K nl  
      rt(2) = p_y ieRBD6_  
     )X!DCL:16  
'计算最大半径 ::Q);  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y)  zn;Hs]G  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) JKi@Kw  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 7a]Zws  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) IH5} Az  
Dim bb(5) As Single uQtk|)T E  
  bb(1) = rr1 qb&NS4#  
  bb(2) = rr2 fy=C!N&/  
  bb(3) = rr3 ecqz@*d&  
  bb(4) = rr4 QD;f
~fZ  
  nb = rr1 U[e8K  
For i = 1 To 4 -,fa{yt-  
    If nb <= bb(i) Then 7}tZ?vD  
       nb = bb(i) CBnouKc:  
    End If *[1u[H9Cv  
Next i E%\7Uo-  
    rt(0) = Sqr(nb) Y^ZBA\D2,k  
    rr = rt() fzFvfMAU  
  End If 8K JQ(  
         1S[5#ewB;j  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  kAZC"qM%i  

kCima/+_  
有热压工艺方面的人才或者资料分享下； u.Mqj"o\  
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 Dh2:2Rz=#7  

高手真多！

楼主威武霸气.