[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： "UGj
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关键点说几个： ^Xy$is3  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） `}8@[iB'  
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 )):22}I#  
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 d3=6MX[c  

以下是几个重要的函数： oz0n$`O$/  
1.判断点在区域中函数 ]AZ\5C-J  
2.计算夹角函数 JdUz!=I  
3.转置函数 [mf7>M`p]@  
4.得到区域中心点，及区域半径函数 Hdbnb[e  
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） 3pTS@  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 vpeBQ=2\  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 3r-VxP 5n  
   cax = x2 - x1 Cwsoz  
   cay = y2 - y1 (Q@+v<   
   cbx = x2 - x3 .kbr?N,
'  
   cby = y2 - y3 ]D?# \|  
   mo_jj = cax * cbx + cay * cby qJX+[PJ  
   mo_ca = Sqr(cax * cax + cay * cay) 6R-C0_'h  
   mo_cb = Sqr(cbx * cbx + cby * cby) dE5 5  
   cos_acb = mo_jj / (mo_ca * mo_cb) $h,&b<-  
   'ff_cos = cos_acb *dG}R#9Nv  
   If cos_acb >= 1 Then u 5Eo  
   nn = 0 cZaF f?]k  
   ElseIf cos_acb <= -1 Then e+F}9HR7  
   nn = 3.14159265258979 >w2Q1!  
   Else z)&naw.  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) x5fgF;  
   End If dXhCyr%"6  
   'ff_angle = nn J@k
tj(  
   ff_angle = nn * 180 / 3.14159265258979 Q/QQ:t<XUi  
End Function

'判断点在区域内函数 :u>W&D  
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 CF3E]dt  
Dim aob, boc, cod, doa, sum As Single W>p\O9BG  
  If ppx = p1x And ppy = p1y Then }.fL$,7a  
     point_in = True DC
$7B`#D  
     Exit Function kf+JM/  
  End If Yw~;g:
=  
  If ppx = p2x And ppy = p2y Then kF(Ce{;z  
     point_in = True eZ@Gu  
     Exit Function tSEA999  
  End If Jj=yG"$!  
   If ppx = p3x And ppy = p3y Then U9<_6Bsd  
     point_in = True l9_m>X~  
     Exit Function W$z#ssr  
  End If -!XrwQyk  
     /J1S@-  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) H{j~ihq7  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ?JuX~{{.L  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) %$/=4f.j  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 6PiEa(  
    sum = aob + boc + cod + doa 'fS?xDs-v  
    If 360.01 > sum And sum > 359.99 Then .HyjL5r-  
       point_in = True 3xBN10R#  
    Else r@|R-Binz  
       point_in = False r> Fec  
    End If E/:+@'(k  
End Function

'得到点半径,得到交点坐标函数 !$D&6M|C8l  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() B:e.gtM5  
    '求得中心点坐标 |$M@09,F"  
Dim tt As String /r>IV`n{  
Dim rt(3) As Single kXigX
-  
    '判断是否平行 M,&tA1CH  
   acx = p3x - p1x nARxn#<+  
   acy = p3y - p1y 'n>K^rA  
   bdx = p4x - p2x ?x:m;z/  
   bdy = p4y - p2y 9Kc0&?q@D  
   If acx * bdy = acy * bdx Then {V.Wk  
      rt(0) = 0 vZ:G8K)o(  
      Exit Function +z+F-  
   Else 7Aqn[1{_O  
      '判断斜率存在否 XxhsPFv  
      If p1x = p3x And p2x <> p4x Then =\M)6"}y}  
         tt = "ac_n_bd_y" :b"=KQ  
      ElseIf p1x <> p3x And p2x = p4x Then I9;xzES  
         tt = "ac_y_bd_n" VxNXd?  
      ElseIf p1x <> p3x And p2x <> p4x Then |B 9t-  
         tt = "ac_y_bd_y" K-Re"zsz  
      End If NK8<= n%"  
    Select Case tt 7kdeYr~<1  
         Case "ac_n_bd_y" J(4g4?  
            'bd线段方程 QQ*gFP.Ao  
            k_bd = bdy / bdx O97VdNT8  
            b_bd = p2y - k_bd * p2x Dq|GQdZ>o  
            p_x = p1x yGRR8F5>(  
            p_y = k_bd * p_x + b_bd  "";=DH  
         Case "ac_y_bd_n" %yeu"  
            'ac线段方程 \e_IFISC  
            k_ac = acy / acx @]*[c})/  
            b_ac = p1y - k_ac * p1x 1bd$XnU  
            p_x = p2x kPWBDpzN  
            p_y = k_ac * p_x + b_ac $Tfm/=e  
        Case "ac_y_bd_y" Qy/uB$q{A  
           'ac，bd线段都要求 L,#^&9bHa#  
           k_ac = acy / acx YDW|-HIF  
           b_ac = p1y - k_ac * p1x ]7*k
Wc2  
           k_bd = bdy / bdx VDG|>#[!  
           b_bd = p2y - k_bd * p2x 3eWJt\}?B  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) lHcA j{6  
           p_y = k_ac * p_x + b_ac su}&".e^  
        End Select f#1/}Hq/I  
      rt(1) = p_x TopHE  
      rt(2) = p_y V- /YNRV  
     XJc ,uj7  
'计算最大半径 ,}KwP*:Z  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) pKq]X}[^c  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 9YAM#LBTWi  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 0',[J  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) #vtN+E  
Dim bb(5) As Single dbCNhbN(  
  bb(1) = rr1 @$oZ|ZkZ  
  bb(2) = rr2 t-x[:i  
  bb(3) = rr3 vG2.]?  
  bb(4) = rr4 pp<E))&R  
  nb = rr1 s"q=2i  
For i = 1 To 4 Z/gsCYS3F  
    If nb <= bb(i) Then Yc|uD-y  
       nb = bb(i) 0 k9<&  
    End If CG.,/]_  
Next i pcnl0o~  
    rt(0) = Sqr(nb) Zb"jB$58  
    rr = rt() eSn$k:\W  
  End If _W}(!TKO  
         ?,>5[Ha^?  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  (w$'o*z;(  

sLhDO'kM  
有热压工艺方面的人才或者资料分享下； mNDuwDd$S  
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 %*K;np-q{  

高手真多！

楼主威武霸气.