[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： WIwbf|\  
nMU#g])y)  
pv;c<NQ'1  

关键点说几个： c%.f|/.k  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ;F&wGe  
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 b("JgE`  
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 lwH&4K  

以下是几个重要的函数： vg5zsR0u  
1.判断点在区域中函数 tC+9W1o  
2.计算夹角函数 +N[dYm  
3.转置函数 |
D^Q}uT  
4.得到区域中心点，及区域半径函数 xsRMF&8L  
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） o,) p*glO  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 VDnAQ[T@d  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single !Rb7q{@>  
   cax = x2 - x1 *R~oA`
 
   cay = y2 - y1 b1*6)  
   cbx = x2 - x3 ?tA-`\E  
   cby = y2 - y3 LnJ7i"Q  
   mo_jj = cax * cbx + cay * cby |9\Lv$
VJ  
   mo_ca = Sqr(cax * cax + cay * cay) +V'r>C:  
   mo_cb = Sqr(cbx * cbx + cby * cby) jB1\L<P  
   cos_acb = mo_jj / (mo_ca * mo_cb) Rkm7"dO0  
   'ff_cos = cos_acb V)(pe #P  
   If cos_acb >= 1 Then JR<R8+@g_  
   nn = 0 Osy5|Ts  
   ElseIf cos_acb <= -1 Then >8AtT=}w  
   nn = 3.14159265258979 2!6Kzq  
   Else '6WDs]\  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) fGe{7p6XV*  
   End If +?@qux!  
   'ff_angle = nn s+CXKb +  
   ff_angle = nn * 180 / 3.14159265258979 >y8Z{ALQ5  
End Function

'判断点在区域内函数 Q?;ntzi  
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 <?7~,#AK  
Dim aob, boc, cod, doa, sum As Single 2bC%P})m  
  If ppx = p1x And ppy = p1y Then _k@l-Bj  
     point_in = True V9bLm,DtT  
     Exit Function KW
H  
  End If bbM !<&F  
  If ppx = p2x And ppy = p2y Then A3$b_i@P  
     point_in = True hWu)0t  
     Exit Function :
)yM9^<D  
  End If Dm^kuTIG  
   If ppx = p3x And ppy = p3y Then t8+93,*B  
     point_in = True Smux&e  
     Exit Function !Yf0y;e|:  
  End If aRwBxf  
     c8s/`esA  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) !{XO#e  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) x M[#Ah)  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) .0ZvCv:>  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) $g^;*>yr  
    sum = aob + boc + cod + doa l{AT)
1;^  
    If 360.01 > sum And sum > 359.99 Then ?n+\T'f!  
       point_in = True }>:X|4]  
    Else D-!%L<<  
       point_in = False E;Hjw0M'k  
    End If z~5'p(|@f  
End Function

'得到点半径,得到交点坐标函数 Jx<  
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()
~] 2R+  
    '求得中心点坐标 J|IDnCK  
Dim tt As String ~
dLZ[6Z  
Dim rt(3) As Single 3\G=J  
    '判断是否平行 XEEbmIO*<9  
   acx = p3x - p1x v],DBw9  
   acy = p3y - p1y xW4+)F5P(  
   bdx = p4x - p2x e8 aV qq[  
   bdy = p4y - p2y "tARJW  
   If acx * bdy = acy * bdx Then cFvx*n  
      rt(0) = 0 W
U\bJ}  
      Exit Function "-?Y UY`  
   Else *% *^a\2  
      '判断斜率存在否 /f<(K-o]  
      If p1x = p3x And p2x <> p4x Then m5
X=P5U  
         tt = "ac_n_bd_y" 9iCud6H,h  
      ElseIf p1x <> p3x And p2x = p4x Then EYG E#C; d  
         tt = "ac_y_bd_n" mNel3J3  
      ElseIf p1x <> p3x And p2x <> p4x Then B;r$( 'UZ  
         tt = "ac_y_bd_y" ~2431<YV  
      End If UGt7iT<`8  
    Select Case tt .*blM1+6i/  
         Case "ac_n_bd_y" !.$P`wKr  
            'bd线段方程 dCTpO  
            k_bd = bdy / bdx uLljM{I  
            b_bd = p2y - k_bd * p2x G{~p.?f:  
            p_x = p1x Dt.Wb&V_w  
            p_y = k_bd * p_x + b_bd pe})A  
         Case "ac_y_bd_n" hp4(f W  
            'ac线段方程 vq7%SEkES  
            k_ac = acy / acx sLp LY1X  
            b_ac = p1y - k_ac * p1x ;@ X  
            p_x = p2x 1I_q3{  
            p_y = k_ac * p_x + b_ac ]#.&f]6l  
        Case "ac_y_bd_y" z{L;)U B^  
           'ac，bd线段都要求 0 _}89:-  
           k_ac = acy / acx pw yl,A  
           b_ac = p1y - k_ac * p1x .G~5F- 8'  
           k_bd = bdy / bdx @I6A9do  
           b_bd = p2y - k_bd * p2x p|V1Gh<  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) *+4iBpyiB  
           p_y = k_ac * p_x + b_ac F|`B2Gr  
        End Select 5yi q#  
      rt(1) = p_x z.HNb$;  
      rt(2) = p_y ibs"Iv34  
     {; cB
?II  
'计算最大半径 P.Z<b:V!  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 4(GgaQFO?  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Q8cPKDB  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) -xIhN?r)  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) D@W3;T^  
Dim bb(5) As Single _hL4@C  
  bb(1) = rr1 ,nRwwFd.  
  bb(2) = rr2 XPo'iI-  
  bb(3) = rr3 L)Ar{*xC  
  bb(4) = rr4 v^_]W3K  
  nb = rr1 !>Y\&zA  
For i = 1 To 4 -f|^}j?  
    If nb <= bb(i) Then S{7ik,Gdg  
       nb = bb(i) jI<WzvhYG  
    End If 8A u<\~p  
Next i 6Ok=q:;  
    rt(0) = Sqr(nb) "d>g)rvOc  
    rr = rt() k:)u7A+  
  End If T4Gw\Z%  
         |
|ZufFO  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  z'o
iyXEE3  

}uI7\\S  
有热压工艺方面的人才或者资料分享下； xBRh!w  
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 'LbeL1ca  

高手真多！

楼主威武霸气.