[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： we]>(|  
ku.A|+Tn  

描述:请输入描述

图片:2.jpg

a1x7~)z>zi  

关键点说几个： O~'FR[J  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） z\Ui8jo:;  
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 %8D?$v"#Z  
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 zl)&U=
4l  

以下是几个重要的函数： "?H+ u/8$  
1.判断点在区域中函数 $^$ECDOTB  
2.计算夹角函数 j
sWX 6(=  
3.转置函数 pTET%)3  
4.得到区域中心点，及区域半径函数 6Q$BUL}2?  
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） zPBfiK_hV  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 /s8/q2:  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 2fP~;\AP  
   cax = x2 - x1 w`Xg%*]}  
   cay = y2 - y1 v>:=w|.HC  
   cbx = x2 - x3 Mk "vvk  
   cby = y2 - y3 w`-$-4i  
   mo_jj = cax * cbx + cay * cby }{=8&gA0  
   mo_ca = Sqr(cax * cax + cay * cay) \CwtX(6.  
   mo_cb = Sqr(cbx * cbx + cby * cby) N
xB+?  
   cos_acb = mo_jj / (mo_ca * mo_cb) fp-m.d:|  
   'ff_cos = cos_acb  2$)mC9  
   If cos_acb >= 1 Then w>vmF cp  
   nn = 0 ex0oAt^  
   ElseIf cos_acb <= -1 Then D+hB[*7Fs  
   nn = 3.14159265258979 ,5kvn  
   Else PC0HH  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) N*':U^/t4J  
   End If Un\Ubqi0  
   'ff_angle = nn ~zj"OG"zOw  
   ff_angle = nn * 180 / 3.14159265258979 ?"u'#f_  
End Function

'判断点在区域内函数 sU0Stg8&b  
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 ,b4~!V  
Dim aob, boc, cod, doa, sum As Single 3M
xz_~  
  If ppx = p1x And ppy = p1y Then qr
9Imr0w<  
     point_in = True J$#D:KaU:N  
     Exit Function niQ+EAD  
  End If eL_^: -   
  If ppx = p2x And ppy = p2y Then *afej
jW[  
     point_in = True ,,Jjr[A_j  
     Exit Function )ph30B  
  End If tr5'dX4]  
   If ppx = p3x And ppy = p3y Then q _19&;&  
     point_in = True ` %l&zwj>  
     Exit Function ),MU+*`  
  End If xl|ghjn  
     89db5Dx  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 4p?+LdL  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) -ywX5B  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) cB_pyX9Z  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ~K_]N/ >  
    sum = aob + boc + cod + doa [#7D~Lx/  
    If 360.01 > sum And sum > 359.99 Then $vW^n4!  
       point_in = True j6RJC  
    Else \ hrBq^I  
       point_in = False n}VbdxlN  
    End If +<GrRYbC  
End Function

'得到点半径,得到交点坐标函数 $xLEA\s  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() >-UD]?>  
    '求得中心点坐标 ;_>s0rUV  
Dim tt As String _'H2>V_  
Dim rt(3) As Single {bW"~
_6}  
    '判断是否平行 Z`^ K%P=  
   acx = p3x - p1x @gs26jX~2}  
   acy = p3y - p1y Bjurmo  
   bdx = p4x - p2x mipi]*ZfXE  
   bdy = p4y - p2y A$%@fO.b  
   If acx * bdy = acy * bdx Then GTT5<diw  
      rt(0) = 0 zC<'fT/rG  
      Exit Function (r.$%[,.<  
   Else 58M'r{8_  
      '判断斜率存在否 (PRaiE  
      If p1x = p3x And p2x <> p4x Then 8W(<q|t  
         tt = "ac_n_bd_y" m]bL)]Z  
      ElseIf p1x <> p3x And p2x = p4x Then z~GVvgd  
         tt = "ac_y_bd_n" OJnPP>  
      ElseIf p1x <> p3x And p2x <> p4x Then 0*37D5jH  
         tt = "ac_y_bd_y" ;+S2

h-4  
      End If ON:LPf>"-  
    Select Case tt -fb1cv~N  
         Case "ac_n_bd_y" ?y+\v'3v  
            'bd线段方程 U;x99Go:  
            k_bd = bdy / bdx p*A^0DN'Fn  
            b_bd = p2y - k_bd * p2x
$I?=.:<+  
            p_x = p1x k/$Ja;  
            p_y = k_bd * p_x + b_bd Rh wt<  
         Case "ac_y_bd_n" 43UJ#rF  
            'ac线段方程 :7HVBH  
            k_ac = acy / acx dL1~]Z y  
            b_ac = p1y - k_ac * p1x Y9z:xE  
            p_x = p2x 6|Ba  
            p_y = k_ac * p_x + b_ac #R~">g:w  
        Case "ac_y_bd_y" uYG #c(lc  
           'ac，bd线段都要求 3MS3O.0]/  
           k_ac = acy / acx k+W  
           b_ac = p1y - k_ac * p1x T=hm#]
  
           k_bd = bdy / bdx -~QlHp&SY  
           b_bd = p2y - k_bd * p2x |NphG|  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 9+WY@du+  
           p_y = k_ac * p_x + b_ac 31 KDeFg  
        End Select KUl Zk^a  
      rt(1) = p_x SL?%/$2g=O  
      rt(2) = p_y {|8:U}<#h  
     eZa3K3^  
'计算最大半径 d +*T@k]>M  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ;XD>$t@  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) m? \#vw$
 
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) |q1b8A\  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ;/6:lL  
Dim bb(5) As Single \t&n jMWpZ  
  bb(1) = rr1 :Su5  
  bb(2) = rr2 /NPl2\o.  
  bb(3) = rr3 B1 jH.(  
  bb(4) = rr4 s+OvS9et_  
  nb = rr1 #R"9)vHp  
For i = 1 To 4 K-g=td/@  
    If nb <= bb(i) Then \kua9b
K  
       nb = bb(i) QjW~6Z.tI  
    End If VfJX<e=k  
Next i ;DT
"S{"7  
    rt(0) = Sqr(nb) ThT.iD[  
    rr = rt() Q!BkS=H30K  
  End If AOvH&9**  
         +E""8kW- Z  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  U S~JLJI
 

9cHNwgD>v  
有热压工艺方面的人才或者资料分享下； B\~3p4S  
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 r;s3(@[,@  

高手真多！

楼主威武霸气.