[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： )p12SGR5  
P,D >gxl  

描述:请输入描述

图片:2.jpg

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关键点说几个： ^/Gjk  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 5g/^wKhKG  
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 $@8\9Y {  
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 ]p+t>'s  

以下是几个重要的函数： [.dNX  
1.判断点在区域中函数 { H9pF2C  
2.计算夹角函数 NF&\<2kX  
3.转置函数 TSHp.ABf  
4.得到区域中心点，及区域半径函数 pc-'+7Dh>  
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） >2$Ehw:K^  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 / HaS.  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single bmT  J  
   cax = x2 - x1 C .YtjLQP$  
   cay = y2 - y1 nW|[poQK  
   cbx = x2 - x3 9h*$P:S;1v  
   cby = y2 - y3 6LvUi|~"<  
   mo_jj = cax * cbx + cay * cby O@E&lP6  
   mo_ca = Sqr(cax * cax + cay * cay) ^T^U:Zdq  
   mo_cb = Sqr(cbx * cbx + cby * cby) * k=L  
   cos_acb = mo_jj / (mo_ca * mo_cb) $8_*LR$  
   'ff_cos = cos_acb \I'A:~b)L  
   If cos_acb >= 1 Then OQ!mL3f  
   nn = 0 ZMx_J  
   ElseIf cos_acb <= -1 Then (W@ y
pK@  
   nn = 3.14159265258979 {-17;M$  
   Else 6{+~B2Ef  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) k"Sw,"e>+  
   End If -*yj[?6  
   'ff_angle = nn Tb{,WUJg2  
   ff_angle = nn * 180 / 3.14159265258979 \N"K^kR4  
End Function

'判断点在区域内函数 Yq5}r?N  
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 c#{<| .  
Dim aob, boc, cod, doa, sum As Single s|{K?s  
  If ppx = p1x And ppy = p1y Then -,4_ &V  
     point_in = True -F5U.6~`!  
     Exit Function 4] DmgOru%  
  End If ao7|8[  
  If ppx = p2x And ppy = p2y Then < W&~tVv  
     point_in = True 8q tNK>D  
     Exit Function "aa6W  
  End If wlKL|N  
   If ppx = p3x And ppy = p3y Then Pv/P<i^  
     point_in = True F ^E(AE  
     Exit Function 9"V27"s  
  End If pl"|NZz 7;  
     5~.\rcr%  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) |AWu0h\keO  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Hs-NP#I  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) d3n TJX  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) {z.}u5N
 
    sum = aob + boc + cod + doa ,][+:fvS  
    If 360.01 > sum And sum > 359.99 Then 5'z&kl0"S  
       point_in = True u\t ;  
    Else b0KorUr  
       point_in = False EkTen:{G  
    End If T>?sPq  
End Function

'得到点半径,得到交点坐标函数 ]AHi$Xx  
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() H%%#^rb^  
    '求得中心点坐标 M#|TQa
N  
Dim tt As String _<3:vyfdC  
Dim rt(3) As Single G:@gO2(D  
    '判断是否平行 O-&n5  
   acx = p3x - p1x slPFDBx  
   acy = p3y - p1y h hdn9n  
   bdx = p4x - p2x kYR&t}jlCg  
   bdy = p4y - p2y @nZFw.  
   If acx * bdy = acy * bdx Then b1 KiO2 E  
      rt(0) = 0 nFB;!r  
      Exit Function XHe=  
   Else @9c^{x\4  
      '判断斜率存在否 dmF<J>[  
      If p1x = p3x And p2x <> p4x Then iSsy_ |  
         tt = "ac_n_bd_y" *2>%>qu  
      ElseIf p1x <> p3x And p2x = p4x Then tDi=T]-bt  
         tt = "ac_y_bd_n" 8a05`ZdP  
      ElseIf p1x <> p3x And p2x <> p4x Then Ak9W8Z}  
         tt = "ac_y_bd_y" $*@mxwMQ}  
      End If HV?awc  
    Select Case tt Jl9T[QAJn1  
         Case "ac_n_bd_y" ^SjGNg^ 7D  
            'bd线段方程 &Owt:R)9~  
            k_bd = bdy / bdx Ar):D#D  
            b_bd = p2y - k_bd * p2x I;xTyhUd  
            p_x = p1x 6%yr>BFtVV  
            p_y = k_bd * p_x + b_bd 9(@bjL465  
         Case "ac_y_bd_n"
m_]"L
 
            'ac线段方程 MK"Yt<e(o  
            k_ac = acy / acx E|5gKp-wJ  
            b_ac = p1y - k_ac * p1x Q5jP`<zWU  
            p_x = p2x
+"SBt}1  
            p_y = k_ac * p_x + b_ac \ _i`=dx  
        Case "ac_y_bd_y" [&zP$i&  
           'ac，bd线段都要求 rzO:9# d  
           k_ac = acy / acx ->j9(76"  
           b_ac = p1y - k_ac * p1x wZOO#&X#r  
           k_bd = bdy / bdx :
#gz)r  
           b_bd = p2y - k_bd * p2x 4 5Ql7~  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) %d?%^) u,  
           p_y = k_ac * p_x + b_ac C'=C^X%  
        End Select |Rp
C0I  
      rt(1) = p_x o?%x!m>  
      rt(2) = p_y W"2\vo)  
     P, Vq/Tt  
'计算最大半径 @E==~ b  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) I5bi^!i  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 95H`-A  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 6?KsH;L9  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) U5"F1CaW~  
Dim bb(5) As Single V)0bLR  
  bb(1) = rr1 rSZWmns  
  bb(2) = rr2 fqr}tvMr=T  
  bb(3) = rr3 jf%Ydr}`  
  bb(4) = rr4 ae^xuM?7  
  nb = rr1 (Ux%7H_d  
For i = 1 To 4 :}GxJT4  
    If nb <= bb(i) Then dyx4_!fO  
       nb = bb(i) ^<E,aCy  
    End If "qDEI}  
Next i qt1#P  
    rt(0) = Sqr(nb) ioviJ7N% O  
    rr = rt() $GPA6  
  End If IBuuZ.=j2h  
         T2Vj&EA@  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  C :e 'wmA  

7i'vAOnw^  
有热压工艺方面的人才或者资料分享下； d- ]%  
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 VVf~
ULZ-  

高手真多！

楼主威武霸气.