[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： KNx/1lf  
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关键点说几个： yLa@27T\A  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） nGF +a[Z  
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 Z.\q$U7'9  
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 ^Oz~T
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以下是几个重要的函数： r[L.TX3Ah=  
1.判断点在区域中函数 >XgoN\w
 
2.计算夹角函数 LqWiw24#  
3.转置函数 hG1$YE  
4.得到区域中心点，及区域半径函数 WyO*8b_ D  
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 vErzUxN  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 '}hSh  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single n_Quu
UB  
   cax = x2 - x1 g0,~|.  
   cay = y2 - y1 xg p)G!  
   cbx = x2 - x3 ~^F]t$rz  
   cby = y2 - y3 FWW4n_74  
   mo_jj = cax * cbx + cay * cby ufL,Kq4  
   mo_ca = Sqr(cax * cax + cay * cay) ?_]Y8f  
   mo_cb = Sqr(cbx * cbx + cby * cby) x?Sx cQP  
   cos_acb = mo_jj / (mo_ca * mo_cb) : /5+p>Ep}  
   'ff_cos = cos_acb RRO@r}A!y  
   If cos_acb >= 1 Then !.R-|<2|6  
   nn = 0 h[(YH ;Y  
   ElseIf cos_acb <= -1 Then !{&r|6  
   nn = 3.14159265258979 30h[&
Oc  
   Else i@/%E~W  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) JQ+Mg&&Q  
   End If G]B0LUT6c  
   'ff_angle = nn r'i99~  
   ff_angle = nn * 180 / 3.14159265258979 I gJu/{:y^  
End Function

'判断点在区域内函数 P~(&lu/;P  
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 {r&r^!K;  
Dim aob, boc, cod, doa, sum As Single " lD -*e4  
  If ppx = p1x And ppy = p1y Then Pr>$m{ Z  
     point_in = True !d##q)D f?  
     Exit Function #7fOH U8v  
  End If $Y/z+ea  
  If ppx = p2x And ppy = p2y Then q`AsnAzo&  
     point_in = True $bp'b<jx  
     Exit Function >(:3H+  
  End If -Ua5anzB  
   If ppx = p3x And ppy = p3y Then /8Lb_QH{  
     point_in = True 0,0WdJAe  
     Exit Function ,5 8-h?B0v  
  End If Mx}r! Q  
     0Cc3NNdz  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) [
]OS p&  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) u9_?c G-  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 7gtaI3   
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) K81FKV.  
    sum = aob + boc + cod + doa D*L@I@ [  
    If 360.01 > sum And sum > 359.99 Then uJ"#j X  
       point_in = True X>dQK4!R  
    Else 8Ogg(uS70'  
       point_in = False SP0ueAa}  
    End If aaVq>$G3  
End Function

'得到点半径,得到交点坐标函数 _576Qa'rm  
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() J?p|Vy|9  
    '求得中心点坐标 tm;\m!^X{  
Dim tt As String UeUOGf ,  
Dim rt(3) As Single z'Bvjul  
    '判断是否平行 %i&am=  
   acx = p3x - p1x f`}u9!jVR  
   acy = p3y - p1y ?zo7.R-Vac  
   bdx = p4x - p2x |r*y63\T  
   bdy = p4y - p2y {s@&3i?ZiC  
   If acx * bdy = acy * bdx Then ^(*eoe  
      rt(0) = 0 @&h_+|:-  
      Exit Function ubl Y%{"  
   Else s
_u! RrC  
      '判断斜率存在否 d.snD)X  
      If p1x = p3x And p2x <> p4x Then F0xm%?  
         tt = "ac_n_bd_y" q|.0Ja  
      ElseIf p1x <> p3x And p2x = p4x Then R<T5lkJ\/  
         tt = "ac_y_bd_n" B)DtJf  
      ElseIf p1x <> p3x And p2x <> p4x Then 17rg!'+   
         tt = "ac_y_bd_y" kDKfJp&a  
      End If NS4W!o;"  
    Select Case tt xG%O^  
         Case "ac_n_bd_y" `C:J{`  
            'bd线段方程 %H"AHkge:a  
            k_bd = bdy / bdx En+`ZcA\z  
            b_bd = p2y - k_bd * p2x !&8B8jHqA  
            p_x = p1x BBoVn^Z*R  
            p_y = k_bd * p_x + b_bd btf]~YN  
         Case "ac_y_bd_n" LZPLz@=&]  
            'ac线段方程 5X`m.lhUc  
            k_ac = acy / acx r2;+ACwWf_  
            b_ac = p1y - k_ac * p1x 6K.0dhl>`B  
            p_x = p2x w3Qil[rg
 
            p_y = k_ac * p_x + b_ac .|6Wmn-uS  
        Case "ac_y_bd_y" jW|M)[KJN  
           'ac，bd线段都要求 \T!tUd  
           k_ac = acy / acx Cp-p7g0wlg  
           b_ac = p1y - k_ac * p1x kEdAt5/U{  
           k_bd = bdy / bdx i;<H^\%  
           b_bd = p2y - k_bd * p2x x8rp Z  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) k8sjW!2  
           p_y = k_ac * p_x + b_ac 4H%Ai(F}_  
        End Select ^^*dHWHn<  
      rt(1) = p_x *Q3q(rdrp  
      rt(2) = p_y alQ:'K  
     PwxRu  
'计算最大半径 vB/G#\Zqz  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) >x1?t  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) w
tro'r3  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) o7@81QA!e  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) y}lqF8s  
Dim bb(5) As Single NHzhGg]  
  bb(1) = rr1 (^Hpe5h&  
  bb(2) = rr2 tsTCZ);(  
  bb(3) = rr3 ~d6zpQf7>  
  bb(4) = rr4 $]]|#}J  
  nb = rr1 .37Jrh0Iv  
For i = 1 To 4 B}p{$g!  
    If nb <= bb(i) Then [Gb8o'  
       nb = bb(i) }7|UA%xz  
    End If 6M_,4> -  
Next i Hk|wO:7
Be  
    rt(0) = Sqr(nb) w ]$Hr   
    rr = rt() @ **]o  
  End If KP]{=~(  
         ?,x3*'-(  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  \&Zp/;n  

Qaeg3f3F3  
有热压工艺方面的人才或者资料分享下； $vK(Qm  
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 _8I\!  

高手真多！

楼主威武霸气.