[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： oA%[x  
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关键点说几个： elB 8   
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） nHrCSfK  
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 &2igX?60  
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 .x8$PXjPG  

以下是几个重要的函数： Y1\vt+`O  
1.判断点在区域中函数 7k|(5P;  
2.计算夹角函数 $twF93u$  
3.转置函数 CF_!{X_k}  
4.得到区域中心点，及区域半径函数 =rF8[Q0K  
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） q:^Cw8  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 !k9h6/b6  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ?%Fk0E#>2  
   cax = x2 - x1 s#ZH.z@J  
   cay = y2 - y1 RC%r7K f  
   cbx = x2 - x3
d?Cl04  
   cby = y2 - y3 W^Y0>W~  
   mo_jj = cax * cbx + cay * cby F-0PmO~3+W  
   mo_ca = Sqr(cax * cax + cay * cay) 12dW:#[  
   mo_cb = Sqr(cbx * cbx + cby * cby) V"iLeC  
   cos_acb = mo_jj / (mo_ca * mo_cb) *`T&Dlt'8  
   'ff_cos = cos_acb ts>}>}@vc  
   If cos_acb >= 1 Then ]{^vs'as\  
   nn = 0 c F]3gM  
   ElseIf cos_acb <= -1 Then Dj"=k
L0  
   nn = 3.14159265258979 :PkZ(WZ9  
   Else >/bK?yT<  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) \}NWR{=  
   End If Y3>\;W*?  
   'ff_angle = nn Pc==]H(  
   ff_angle = nn * 180 / 3.14159265258979 ped Yf{T  
End Function

'判断点在区域内函数 $VIq)s2az|  
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 w8I&:"^7<  
Dim aob, boc, cod, doa, sum As Single 5V8C+k)  
  If ppx = p1x And ppy = p1y Then 5>Yd\(`K  
     point_in = True FH`&C*/F0Y  
     Exit Function 7#qL9+G  
  End If b)^ZiRW``  
  If ppx = p2x And ppy = p2y Then { BL1j  
     point_in = True n3j h\  
     Exit Function }/3pC a  
  End If 6'!{0 5=m  
   If ppx = p3x And ppy = p3y Then OUO^/] J1S  
     point_in = True ){6)?[G  
     Exit Function WVK-dBU  
  End If &novkkqY  
     X$Vz  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) pF+wHMhUe  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) <dPxy`_  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) m@yVG|eP#  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 4 xzJql  
    sum = aob + boc + cod + doa jZ,[{Z(N   
    If 360.01 > sum And sum > 359.99 Then $: m87cR~  
       point_in = True $=xQX  
    Else bMOM`At>z  
       point_in = False g~:(EO(w  
    End If fYM6wYJ  
End Function

'得到点半径,得到交点坐标函数 L(2P|{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() O| 6\g>ew  
    '求得中心点坐标 &
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Dim tt As String SA+%c)j29  
Dim rt(3) As Single RzJ}CT  
    '判断是否平行 qTh='~m4[  
   acx = p3x - p1x ^lc}FN  
   acy = p3y - p1y Y!1^@;)^  
   bdx = p4x - p2x <kXV1@>  
   bdy = p4y - p2y ' raB  
   If acx * bdy = acy * bdx Then /\a]S:V-j  
      rt(0) = 0 ENx@Ex
 
      Exit Function %X,B-h^  
   Else p@7i=hyt`p  
      '判断斜率存在否 fqk Dk  
      If p1x = p3x And p2x <> p4x Then h$7Fe +#I#  
         tt = "ac_n_bd_y" ~d7Wjn$@  
      ElseIf p1x <> p3x And p2x = p4x Then >6l;/J  
         tt = "ac_y_bd_n" [[0bhmG)  
      ElseIf p1x <> p3x And p2x <> p4x Then $,e?X}4  
         tt = "ac_y_bd_y" Ce5w0&VlS  
      End If /q"d`!h)w  
    Select Case tt <[y$D=n  
         Case "ac_n_bd_y" 0fPHh>u  
            'bd线段方程 /#qs(! d  
            k_bd = bdy / bdx Rw/JPC"  
            b_bd = p2y - k_bd * p2x _L4<^Etfm  
            p_x = p1x jq("D,  
            p_y = k_bd * p_x + b_bd FSU%?PxO  
         Case "ac_y_bd_n" )
}Rfa}MD  
            'ac线段方程 P7wqZ?  
            k_ac = acy / acx wsJ%* eYf  
            b_ac = p1y - k_ac * p1x N;x<| %peL  
            p_x = p2x ^?s~Fk_V  
            p_y = k_ac * p_x + b_ac TXJY2J*24  
        Case "ac_y_bd_y" m/<F 5R  
           'ac，bd线段都要求 KM6N'x^z  
           k_ac = acy / acx W`Q$t56  
           b_ac = p1y - k_ac * p1x uh5Pn#da^  
           k_bd = bdy / bdx [<Os~bfOv  
           b_bd = p2y - k_bd * p2x NlF0\+h  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 6@?aVM~  
           p_y = k_ac * p_x + b_ac kByrhK5U  
        End Select 77xq/c[)  
      rt(1) = p_x c:ll
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      rt(2) = p_y vcw>v={x  
     aVppOxA  
'计算最大半径 %kK ][2e  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 5e#&"sJ.1  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ]{,Gf2v;;d  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 2JiA
d*WK  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) RGl=7^M  
Dim bb(5) As Single b46[fa  
  bb(1) = rr1 ~_u*\]-  
  bb(2) = rr2 "?.'{,Q  
  bb(3) = rr3 Qe>i{:N  
  bb(4) = rr4 't|Un G  
  nb = rr1 cBLR#Yu;O5  
For i = 1 To 4 ([,vX"4  
    If nb <= bb(i) Then r zMFof  
       nb = bb(i) %XP_\lu]  
    End If Uvjdx(fY[a  
Next i L$+d.=]  
    rt(0) = Sqr(nb) (C`FicY  
    rr = rt() .M9d*qp`S  
  End If bJQ5- *F  
         $J QWfGwR  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  >ajuk  

Mtm/}I  
有热压工艺方面的人才或者资料分享下； P` #QGZ>  
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 U#bl=%bF  

高手真多！

楼主威武霸气.