[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： _m#TL60m  
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关键点说几个： fv>Jn`  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） t#]VR7]  
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^#}kN7V  
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 2|M,#2E-  

以下是几个重要的函数： bXHtw}n  
1.判断点在区域中函数 k@9q5lu;T  
2.计算夹角函数 kw1Lm1C  
3.转置函数 "1ZVuI  
4.得到区域中心点，及区域半径函数 ,#.^2O9-^  
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） v[m1R'  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Bq85g5Dc  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single T!5g:;~y >  
   cax = x2 - x1 w6k^|."  
   cay = y2 - y1 /9C>{29x!  
   cbx = x2 - x3 A^
ry|4`3(  
   cby = y2 - y3 PF;`mdi-,  
   mo_jj = cax * cbx + cay * cby LoS%FI  
   mo_ca = Sqr(cax * cax + cay * cay) G9> 0w)r  
   mo_cb = Sqr(cbx * cbx + cby * cby) S3/Z]?o  
   cos_acb = mo_jj / (mo_ca * mo_cb) js=w!q0)9  
   'ff_cos = cos_acb k%cT38V*  
   If cos_acb >= 1 Then rAQ3x0  
   nn = 0 D)
JI11a<  
   ElseIf cos_acb <= -1 Then d[KG0E5`  
   nn = 3.14159265258979 s.@DI|Gnf  
   Else SL%lY  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) rEZMX2  
   End If , @6_sl  
   'ff_angle = nn /57)y_ \  
   ff_angle = nn * 180 / 3.14159265258979 ]P(_ d'}  
End Function

'判断点在区域内函数 ais"xm
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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 25`6V>\  
Dim aob, boc, cod, doa, sum As Single 09rbu\h  
  If ppx = p1x And ppy = p1y Then &r!*Y&  
     point_in = True u+vUv~4A6  
     Exit Function l8ZzKb-  
  End If S4(lC%$|  
  If ppx = p2x And ppy = p2y Then 1C\[n(9  
     point_in = True 5i1Xumh 4  
     Exit Function GbZqLZ0  
  End If q%GlS=o"  
   If ppx = p3x And ppy = p3y Then dJd(m&.|N  
     point_in = True =P<7tsSuoK  
     Exit Function `+Ojh>"*z*  
  End If ibskce{H  
     'IroQ M  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) IHtNaN )  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ]l4#KI@  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ue{0X\[P<  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) qY$/i#  
    sum = aob + boc + cod + doa zHvG3Ed@  
    If 360.01 > sum And sum > 359.99 Then Mk@%Wuxg2  
       point_in = True .#y.:Pb|e  
    Else %B'*eBj~fw  
       point_in = False I='S).  
    End If ohe0}~)V  
End Function

'得到点半径,得到交点坐标函数 EpCsJ08K  
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() .A`Q!  
    '求得中心点坐标 %;|^*?!J0  
Dim tt As String c~a:i=y67  
Dim rt(3) As Single MxO0#  
    '判断是否平行 0"_FQv  
   acx = p3x - p1x xi2!__  
   acy = p3y - p1y OZ6gu$ n*  
   bdx = p4x - p2x Z;bg;@r|  
   bdy = p4y - p2y pIy+3&\e;  
   If acx * bdy = acy * bdx Then Hki  
      rt(0) = 0 fH/J8<  
      Exit Function 9$pQ|e0t
J  
   Else !Z*2X ^  
      '判断斜率存在否 ir%?J&C+t  
      If p1x = p3x And p2x <> p4x Then ?UlAwxn  
         tt = "ac_n_bd_y" bZ.q?Hlfk  
      ElseIf p1x <> p3x And p2x = p4x Then OTNcNY  
         tt = "ac_y_bd_n" { ke}W  
      ElseIf p1x <> p3x And p2x <> p4x Then QVVR_1Q  
         tt = "ac_y_bd_y" CfoT$g  
      End If "Y Z B@  
    Select Case tt -_@3!X1~i+  
         Case "ac_n_bd_y" o0Y {k8  
            'bd线段方程 A[F tPk{k  
            k_bd = bdy / bdx "r Bb2.  
            b_bd = p2y - k_bd * p2x z+>FKAF  
            p_x = p1x n.{Ud\|  
            p_y = k_bd * p_x + b_bd $-zt,iRyV  
         Case "ac_y_bd_n" 4ACL|RF)A  
            'ac线段方程 JlZU31Xws  
            k_ac = acy / acx -c"nx$  
            b_ac = p1y - k_ac * p1x %B&y^mZv*\  
            p_x = p2x >:s#MwIwm  
            p_y = k_ac * p_x + b_ac Ungex@s_  
        Case "ac_y_bd_y" 4PwjG;!K  
           'ac，bd线段都要求 zCZ]`  
           k_ac = acy / acx cg-\|H1  
           b_ac = p1y - k_ac * p1x O(~74:#*  
           k_bd = bdy / bdx f,ajo   
           b_bd = p2y - k_bd * p2x b42"Y,sbB  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) mlsM;Ad2  
           p_y = k_ac * p_x + b_ac FvpI\%#~  
        End Select ^a6c/2K  
      rt(1) = p_x ~@=*JzP?  
      rt(2) = p_y $n30[P@p;  
     ai!zb2j!E  
'计算最大半径 6PF7Wl7.  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) {_GhS
%  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) >}tm8|IHoo  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) o& g01t  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) \J>a*  
Dim bb(5) As Single h JVy-]  
  bb(1) = rr1 <<,YgRl2  
  bb(2) = rr2 Oq-O|qJj  
  bb(3) = rr3 +9MoKn=h  
  bb(4) = rr4 ev}lb+pr)_  
  nb = rr1 <6_RWtU  
For i = 1 To 4  F'!pM(+  
    If nb <= bb(i) Then _sEkKh8x  
       nb = bb(i) r2WW}W  
    End If ?pS,?>J f  
Next i Rt &Oz!TQ  
    rt(0) = Sqr(nb) IkzY  
    rr = rt() yMdE[/+3  
  End If 73b(A|kQ@  
         \yIan<q  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  | e?:Uq  

)#(6J  
有热压工艺方面的人才或者资料分享下； 0*=[1tdWY  
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 5$58z  

高手真多！

楼主威武霸气.