[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： ZYLPk<<  
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关键点说几个： p?' F$Wz  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） nn8uFISb  
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 H8A=]Gq  
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 M!Ywjvw*)3  

以下是几个重要的函数： "Xj>dB1~  
1.判断点在区域中函数 D6:"k 2  
2.计算夹角函数 qz }PTx  
3.转置函数 yJ2A!id  
4.得到区域中心点，及区域半径函数 ]8|peo{  
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） F>ps&h  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ^fhkWx4i  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Ew2ksZ>B]&  
   cax = x2 - x1 Wa'
m]J  
   cay = y2 - y1 N=;V
S-  
   cbx = x2 - x3 
|\/V1  
   cby = y2 - y3 5u
D'Kd$H  
   mo_jj = cax * cbx + cay * cby JDm7iJxc_  
   mo_ca = Sqr(cax * cax + cay * cay) ' 4Kf  
   mo_cb = Sqr(cbx * cbx + cby * cby) xmwH~UWp  
   cos_acb = mo_jj / (mo_ca * mo_cb) htHnQ4Q  
   'ff_cos = cos_acb +"D*0gYD  
   If cos_acb >= 1 Then 0BQ<a  
   nn = 0 r8vF I6J  
   ElseIf cos_acb <= -1 Then /Avl&Rd  
   nn = 3.14159265258979 u|8yV.=R  
   Else QW6\~l 4  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 
A!p70km2  
   End If 5#$5ct  
   'ff_angle = nn 3QD##Wr^  
   ff_angle = nn * 180 / 3.14159265258979 >T
wL&la  
End Function

'判断点在区域内函数 3qBZzM O*  
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 Dv[ 35[Yh  
Dim aob, boc, cod, doa, sum As Single i*Ee(m]I  
  If ppx = p1x And ppy = p1y Then |csR"DOqz  
     point_in = True .+Fh,bNYK  
     Exit Function x@480r  
  End If pTk1iGfB  
  If ppx = p2x And ppy = p2y Then "+:~#&r  
     point_in = True #F!'B|n  
     Exit Function Z}4 `y"By  
  End If y}!}*Qj+/  
   If ppx = p3x And ppy = p3y Then '}$$o1R  
     point_in = True 9?#L/  
     Exit Function $r87]
y!  
  End If H}B%OFI\+  
     "Rv],O"  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) isR|K9qf^  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) tN:PWj5  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 5cE
?>  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) o$_,2$>mn  
    sum = aob + boc + cod + doa a'2^kds  
    If 360.01 > sum And sum > 359.99 Then sZ9VXnz24  
       point_in = True QL_9a,R'r  
    Else cN\Fg
bt  
       point_in = False =g+Rk+jn  
    End If l gzA) (  
End Function

'得到点半径,得到交点坐标函数 ).b,KSi  
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() rW(<[2vg  
    '求得中心点坐标  N\9Wxz$  
Dim tt As String @XL5$k[Y  
Dim rt(3) As Single ^yo~C3r~  
    '判断是否平行 }hy, }2(8  
   acx = p3x - p1x fyE#8h_>4  
   acy = p3y - p1y z nxAP|  
   bdx = p4x - p2x mWPA]g(  
   bdy = p4y - p2y 8A ;)5!  
   If acx * bdy = acy * bdx Then gLL8-T[9
 
      rt(0) = 0 c/Ykk7T9--  
      Exit Function zZax![Z  
   Else [R~`6  
      '判断斜率存在否 Btgxzf  
      If p1x = p3x And p2x <> p4x Then %!X|X
,b^O  
         tt = "ac_n_bd_y" ?\.aq p1B  
      ElseIf p1x <> p3x And p2x = p4x Then 7}2Aq  
         tt = "ac_y_bd_n" %2jRJ  
      ElseIf p1x <> p3x And p2x <> p4x Then %P2l@}?a  
         tt = "ac_y_bd_y" ]'iOV-2^'  
      End If yHk}'YP  
    Select Case tt .h7`Q{  
         Case "ac_n_bd_y" b&j}f  
            'bd线段方程 muJR~
4  
            k_bd = bdy / bdx AYP*J  
            b_bd = p2y - k_bd * p2x Adma~]T9  
            p_x = p1x V|n}v?f_q  
            p_y = k_bd * p_x + b_bd _vV3A3|Ec,  
         Case "ac_y_bd_n" 34gC[G=  
            'ac线段方程 +-*Ww5Zti  
            k_ac = acy / acx zG. \xmp  
            b_ac = p1y - k_ac * p1x bk}'wcX<+]  
            p_x = p2x UTL
uzm  
            p_y = k_ac * p_x + b_ac x<fF1];  
        Case "ac_y_bd_y" Sd |=*X  
           'ac，bd线段都要求 x[_SNX"  
           k_ac = acy / acx c&GVIrJ  
           b_ac = p1y - k_ac * p1x 1R+/T  
           k_bd = bdy / bdx 3~o#1*->  
           b_bd = p2y - k_bd * p2x z?DI4O#Up  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) +\
_c*'K>  
           p_y = k_ac * p_x + b_ac S4hv7.A  
        End Select  h/*q +H  
      rt(1) = p_x ls*bCe  
      rt(2) = p_y 5mYX#//:  
     DQ*T2*L  
'计算最大半径 \~!!h.xR  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 
Z.l4<  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ' %&gER  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) G=ly .  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) =}D9sT  
Dim bb(5) As Single 6^l|/\Y{  
  bb(1) = rr1 l{o,"P"  
  bb(2) = rr2 e"D%eFkDW  
  bb(3) = rr3 5w+KIHhN|  
  bb(4) = rr4 x=M%QFe  
  nb = rr1 ?bH&F  
For i = 1 To 4 !Soz??~o/  
    If nb <= bb(i) Then M(/ATOJ(  
       nb = bb(i) iLC.?v2=  
    End If NxW Dw  
Next i Mm)yabP  
    rt(0) = Sqr(nb) ?`lD|~  
    rr = rt() [. Db56  
  End If B{ Ab#  
         ;0vCZaEF  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  %.m+6 zaF  

1<Sg@  
有热压工艺方面的人才或者资料分享下； UE{$hLI?g  
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 [#9i@40  

高手真多！

楼主威武霸气.