[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： B)=)@h[f  
`C>De4nT@  

描述:请输入描述

图片:2.jpg

-AZ\u\xCB  

关键点说几个： %eW2w@8]  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 0i~?^sT'  
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 ]oizBa@?G  
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 ]!v\whZ>  

以下是几个重要的函数： s(cC;  
1.判断点在区域中函数 !]l;n Fd  
2.计算夹角函数 Q&8epO|J  
3.转置函数 7O<K?;I  
4.得到区域中心点，及区域半径函数 Dn@Sjsj>  
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） J8?V1Ad{  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 )uC5  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single FZx.Yuv  
   cax = x2 - x1 jh"YHe/X  
   cay = y2 - y1 l^
R1XBP  
   cbx = x2 - x3  |Fe*t  
   cby = y2 - y3 Esdw^MGL2  
   mo_jj = cax * cbx + cay * cby cS RmC  
   mo_ca = Sqr(cax * cax + cay * cay) n7pjj  
   mo_cb = Sqr(cbx * cbx + cby * cby) o?S


!o}  
   cos_acb = mo_jj / (mo_ca * mo_cb) ?b xak  
   'ff_cos = cos_acb ca,U>'(y  
   If cos_acb >= 1 Then w:/QB-`%  
   nn = 0 s_cur-  
   ElseIf cos_acb <= -1 Then WP >VQZ&  
   nn = 3.14159265258979 xP$\ }  
   Else S=qx,<J 39  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Ti$_V_  
   End If nTCwLnX(O  
   'ff_angle = nn ~'0W(~Q8  
   ff_angle = nn * 180 / 3.14159265258979 4q*mEV  
End Function

'判断点在区域内函数 z4 KKt&  
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 s^HI%mdf  
Dim aob, boc, cod, doa, sum As Single Y7<
(_
p7  
  If ppx = p1x And ppy = p1y Then G<Y}QhFU  
     point_in = True xM**n3SZ`  
     Exit Function y\ax?(z  
  End If mT,#"k8  
  If ppx = p2x And ppy = p2y Then BVu{To:g  
     point_in = True N1Dr'aw*  
     Exit Function J }|6m9k!  
  End If eDY)i9"W  
   If ppx = p3x And ppy = p3y Then [Nu py,v  
     point_in = True o<Qt<*  
     Exit Function
6&_K;  
  End If LL+PAvMg  
     B!((N{4H+  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) T9bUt|  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) |jb,sd[=S  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ^wz 2e  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) G{gc]7\=Cd  
    sum = aob + boc + cod + doa f0+vk'Z  
    If 360.01 > sum And sum > 359.99 Then mb*|$ysPx  
       point_in = True Y=Om0=v  
    Else "~L$oji  
       point_in = False i9D<jkc  
    End If tv%B=E!r  
End Function

'得到点半径,得到交点坐标函数 |z?c>
.  
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() {\gpXVrn_  
    '求得中心点坐标 3L9@ELY4  
Dim tt As String Y6m:d&p=}  
Dim rt(3) As Single \i3)/sZ?l  
    '判断是否平行 !vq|*8  
   acx = p3x - p1x wY3|5kbDj  
   acy = p3y - p1y yiMqe^zy  
   bdx = p4x - p2x <[?ZpG  
   bdy = p4y - p2y S=G2%u!;  
   If acx * bdy = acy * bdx Then ?{\h`+A  
      rt(0) = 0 h!?rk|  
      Exit Function Q^):tO]!Ma  
   Else h)Ol1[y`  
      '判断斜率存在否 eIQ@){lJ-]  
      If p1x = p3x And p2x <> p4x Then Wpc8T="q  
         tt = "ac_n_bd_y" 1NkJs&  
      ElseIf p1x <> p3x And p2x = p4x Then 1}~`g ED  
         tt = "ac_y_bd_n" ijgm-1ECk3  
      ElseIf p1x <> p3x And p2x <> p4x Then 1vdG\$  
         tt = "ac_y_bd_y" 6[-[6%o#z  
      End If onl,R{,`0  
    Select Case tt CW -[c  
         Case "ac_n_bd_y" O bc>f|l]  
            'bd线段方程 "(Nt9K%P)  
            k_bd = bdy / bdx Z=oGyA  
            b_bd = p2y - k_bd * p2x f$qkb$?]}  
            p_x = p1x k:URP`w[X=  
            p_y = k_bd * p_x + b_bd . f!dH  
         Case "ac_y_bd_n" 0cq<!{d  
            'ac线段方程 J3$@: S'  
            k_ac = acy / acx 85lcd4&~  
            b_ac = p1y - k_ac * p1x $e:bDZ(hjj  
            p_x = p2x L~C:1VG5  
            p_y = k_ac * p_x + b_ac 
Z>pZ|  
        Case "ac_y_bd_y" Ey%KbvNv  
           'ac，bd线段都要求 AF>t{rw=/  
           k_ac = acy / acx /@&#U bN\  
           b_ac = p1y - k_ac * p1x F
?t;
bV  
           k_bd = bdy / bdx 0~ o,^AW  
           b_bd = p2y - k_bd * p2x )KOIf{  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) $g),|[x+(  
           p_y = k_ac * p_x + b_ac L%+mD$@u  
        End Select AcHeZb8b  
      rt(1) = p_x ;9LOeH?  
      rt(2) = p_y e'->Sg  
     3i~X`@$k>  
'计算最大半径 V>D}z8w7  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ]n3!%0]\  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) NryOdt tI  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) %M:$ML6b<  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) '4CD }  
Dim bb(5) As Single d4p6.3  
  bb(1) = rr1 !t}yoN n|  
  bb(2) = rr2 p(nEcu  
  bb(3) = rr3 "C
?H:8W  
  bb(4) = rr4 =.w~qL  
  nb = rr1 >`p?
CE  
For i = 1 To 4
d{"@<0i?  
    If nb <= bb(i) Then hV
Aatn[  
       nb = bb(i) hzT)5'_  
    End If %m+7$iD  
Next i P#D|CP/Cu  
    rt(0) = Sqr(nb) Q>71uM%e`  
    rr = rt() =2}V=E/85  
  End If 8H|ac[hXK2  
         JKy~'>Q  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  miu?X!  

dR;N3KwY  
有热压工艺方面的人才或者资料分享下； mC$y*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 b9m`y*My  

高手真多！

楼主威武霸气.