[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： ZS]Z0iZv9  
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描述:请输入描述

图片:2.jpg

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关键点说几个： W  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） &$_!S!Sa/  
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 W,CAg7:*  
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 oxL<\4)WJ  

以下是几个重要的函数： `<>QKpAn  
1.判断点在区域中函数 ?0*[ L  
2.计算夹角函数 `t)9u^[<(  
3.转置函数 G&1bhi52  
4.得到区域中心点，及区域半径函数 ?(d1;/0v>  
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） 1kL8EPT%o  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 0D@$  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single xt,Qn460;  
   cax = x2 - x1 JVy|SA&R  
   cay = y2 - y1 $>O~7Nfst7  
   cbx = x2 - x3 }a~hd*-#  
   cby = y2 - y3 [NO4Wzc  
   mo_jj = cax * cbx + cay * cby ;2&"
 
   mo_ca = Sqr(cax * cax + cay * cay) O |P<s+  
   mo_cb = Sqr(cbx * cbx + cby * cby) OQ?N_zs,  
   cos_acb = mo_jj / (mo_ca * mo_cb) \-;f<%+  
   'ff_cos = cos_acb At=d//5FFP  
   If cos_acb >= 1 Then EXVZ?NG  
   nn = 0 2y^:T'p  
   ElseIf cos_acb <= -1 Then q: FhuOP  
   nn = 3.14159265258979 ~BJE~  
   Else C2v_]
,]  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ^OWG9`p+  
   End If J$1H3#VVG  
   'ff_angle = nn ' :B;!3a0d  
   ff_angle = nn * 180 / 3.14159265258979 h^tCF=S  
End Function

'判断点在区域内函数 _(h=@cv  
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 <YFDS;b|  
Dim aob, boc, cod, doa, sum As Single 4mo/MK&M:  
  If ppx = p1x And ppy = p1y Then <F0^+Pf/  
     point_in = True ;i6~iLY  
     Exit Function bGeIb-|(  
  End If %C
iF;wJ  
  If ppx = p2x And ppy = p2y Then ?}s;,_GH  
     point_in = True L>sLb(2\i  
     Exit Function 2n@`Og_0  
  End If sS}:Od  
   If ppx = p3x And ppy = p3y Then wX]$xZ!s  
     point_in = True Ju47}t%HB  
     Exit Function \Yr*x7!  
  End If aH_c84DS  
     `Fr ,,Q81\  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) zG='U  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) )x/#sW%)  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) R~oJ-}iYX  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ;(`bP  
    sum = aob + boc + cod + doa Yt
(FSb31H  
    If 360.01 > sum And sum > 359.99 Then ?{f6su@rW  
       point_in = True 15j5F5P   
    Else e*}zl>f  
       point_in = False X13+n2^8]  
    End If (X"5x]7]  
End Function

'得到点半径,得到交点坐标函数 # atq7tX  
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() 2T2<I/")O  
    '求得中心点坐标 PDD2ouv4  
Dim tt As String }5vKQf  
Dim rt(3) As Single %;QK5L 
 
    '判断是否平行 2Cp4aTGv#  
   acx = p3x - p1x mnM]@8^G  
   acy = p3y - p1y z]8Mv(eL  
   bdx = p4x - p2x QZvQ8  
   bdy = p4y - p2y [m:cO6DM,  
   If acx * bdy = acy * bdx Then D|ze0A@  
      rt(0) = 0 ?{TWsuP7  
      Exit Function vf3)T;X>  
   Else -"nkC  
      '判断斜率存在否 nzaDO-2!  
      If p1x = p3x And p2x <> p4x Then *x2!N$b  
         tt = "ac_n_bd_y" BGibBF^  
      ElseIf p1x <> p3x And p2x = p4x Then Qt4mg?X/  
         tt = "ac_y_bd_n" ]j7`3%4uK  
      ElseIf p1x <> p3x And p2x <> p4x Then F!#)l*OX;  
         tt = "ac_y_bd_y" k(H]ILL  
      End If ]"V_`i7Z  
    Select Case tt <T[LugI  
         Case "ac_n_bd_y" )
'n@A%B  
            'bd线段方程 }~@/r5Zl  
            k_bd = bdy / bdx ZUHW*U.  
            b_bd = p2y - k_bd * p2x 3\m!  
            p_x = p1x $jh$nMx)!  
            p_y = k_bd * p_x + b_bd o i'iZX  
         Case "ac_y_bd_n" 6t;;Fz  
            'ac线段方程 UiV#w#&P  
            k_ac = acy / acx h<&GdK2U+  
            b_ac = p1y - k_ac * p1x J(#6Cld`c  
            p_x = p2x SV t~pE+Y  
            p_y = k_ac * p_x + b_ac N:U}b1$L6  
        Case "ac_y_bd_y" (k!7`<k!Y  
           'ac，bd线段都要求 +C!GV.q[  
           k_ac = acy / acx xbCR4upS  
           b_ac = p1y - k_ac * p1x c+3(|k-M  
           k_bd = bdy / bdx
OlyW/hd  
           b_bd = p2y - k_bd * p2x aWTurnee^  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) pl r@  
           p_y = k_ac * p_x + b_ac ?X|q   
        End Select ri4z^1\  
      rt(1) = p_x O)&W0`VY  
      rt(2) = p_y afX|R  
     
>C_G~R  
'计算最大半径 ^9,^BHlC0  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) @*vVc`;  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) !~C%0{9+u@  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) *bp09XG  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) }6a}8EyFP  
Dim bb(5) As Single 5;KJ0N*-  
  bb(1) = rr1 !%65YTxY-  
  bb(2) = rr2 '-A;B.GV%  
  bb(3) = rr3 xDw~n(*  
  bb(4) = rr4 wyX3qH  
  nb = rr1 JqO1 a?H  
For i = 1 To 4
tm5{h{AM  
    If nb <= bb(i) Then )lLeL#]FLO  
       nb = bb(i) fmK~
?  
    End If ~-vCY  
Next i pdJ]V`m  
    rt(0) = Sqr(nb) yH"i5L9
 
    rr = rt() QSF0?Puf  
  End If (]cL5o9  
         Z#@  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ,nL~?h-Zh  

\^,J
h|T  
有热压工艺方面的人才或者资料分享下； ($`IHKF1.l  
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 lHM} E$5  

高手真多！

楼主威武霸气.