[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： L
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关键点说几个： w9< R#y[A  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） < t,zaIi  
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 [YlKR'_  
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 t gI{`jS%  

以下是几个重要的函数： \Q0[?k  
1.判断点在区域中函数 jB%lB1Q|  
2.计算夹角函数 %4et&zRC  
3.转置函数 a&/#X9/  
4.得到区域中心点，及区域半径函数 <>y;.@}Q  
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） +Elf
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6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 2@'oe7E  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ,?8qpEG~#+  
   cax = x2 - x1 52:HNA\E/  
   cay = y2 - y1 l{I6&^!KS  
   cbx = x2 - x3 ^1iSn)&  
   cby = y2 - y3 $HHs^tW  
   mo_jj = cax * cbx + cay * cby vQosPS_2L  
   mo_ca = Sqr(cax * cax + cay * cay) n.'8A(,r3  
   mo_cb = Sqr(cbx * cbx + cby * cby) +)!YrKuu  
   cos_acb = mo_jj / (mo_ca * mo_cb) @XLy7_}  
   'ff_cos = cos_acb t<#mP@Mz=N  
   If cos_acb >= 1 Then #hfXZVD  
   nn = 0 PF)jdcX  
   ElseIf cos_acb <= -1 Then 60P#,o@G  
   nn = 3.14159265258979 nw-xSS{  
   Else $$|rrG  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 7Ri46Tkt  
   End If 1C}NQ!.  
   'ff_angle = nn sqEI4~514  
   ff_angle = nn * 180 / 3.14159265258979 MLw7}[  
End Function

'判断点在区域内函数 M2PAy! J  
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 <;vbsksZeH  
Dim aob, boc, cod, doa, sum As Single /1"(cQ%?  
  If ppx = p1x And ppy = p1y Then 'Y*E<6:  
     point_in = True ;YA(|h<  
     Exit Function o<|cA5f\  
  End If /(u}KMR!f  
  If ppx = p2x And ppy = p2y Then Ov5"  
     point_in = True (!ZM{Js%  
     Exit Function ?oV
x2LdD|  
  End If rf $QxJ  
   If ppx = p3x And ppy = p3y Then 5:pM4J  
     point_in = True AJh w  
     Exit Function Rn}l6kbM  
  End If o|>'h$  
     +AR5W(&  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 'Q|M'5'  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) XG}
C+;4Aw  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ;XF:\<+  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) {_7i8c<s=  
    sum = aob + boc + cod + doa a][f  
    If 360.01 > sum And sum > 359.99 Then ,5i`-OI  
       point_in = True bSiYHRH.e  
    Else _7H7 dV  
       point_in = False < vL,*.zd  
    End If Wr<j!>J6Ki  
End Function

'得到点半径,得到交点坐标函数 <vUbv  
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() mkYqpD7  
    '求得中心点坐标 y+X2Pl  
Dim tt As String (pY 7J  
Dim rt(3) As Single x}_]A$nV  
    '判断是否平行 %
W=b?:  
   acx = p3x - p1x Sx708`/Ep  
   acy = p3y - p1y |uX,5Q#6  
   bdx = p4x - p2x W?qmp|YD  
   bdy = p4y - p2y 5 xppKt  
   If acx * bdy = acy * bdx Then M^O2\G#B  
      rt(0) = 0 =8t]\Y?  
      Exit Function :# .<[  
   Else [Yo,*,y31  
      '判断斜率存在否 Rtb7|  
      If p1x = p3x And p2x <> p4x Then le1}0L  
         tt = "ac_n_bd_y" 'm4W}F  
      ElseIf p1x <> p3x And p2x = p4x Then !qv ea,vw  
         tt = "ac_y_bd_n" 'JCZ]pZ  
      ElseIf p1x <> p3x And p2x <> p4x Then QIB\AAclO  
         tt = "ac_y_bd_y" : ]sUpO  
      End If 8"U. Hnu  
    Select Case tt Gcdd3W`O  
         Case "ac_n_bd_y" U*i{5/$  
            'bd线段方程 R$
q; !  
            k_bd = bdy / bdx GO__$%~  
            b_bd = p2y - k_bd * p2x B.dH(um  
            p_x = p1x N.\- 8?>  
            p_y = k_bd * p_x + b_bd {_`^R>"\&w  
         Case "ac_y_bd_n" 5MN8D COF  
            'ac线段方程 -db
_E#  
            k_ac = acy / acx *QwY]j%^  
            b_ac = p1y - k_ac * p1x J&M o%"[)  
            p_x = p2x K%a%a6k`  
            p_y = k_ac * p_x + b_ac y`F3Hr c  
        Case "ac_y_bd_y" ht2\y&si  
           'ac，bd线段都要求 P
K{acen  
           k_ac = acy / acx rf>0H^r  
           b_ac = p1y - k_ac * p1x xD5:RE~g  
           k_bd = bdy / bdx \9cG36  
           b_bd = p2y - k_bd * p2x <~6h|F8  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) fDT%!  
           p_y = k_ac * p_x + b_ac pm_`>3  
        End Select `Gn50-@  
      rt(1) = p_x Ove<mFI\  
      rt(2) = p_y h-G)o[MA  
     (Dw,DY9  
'计算最大半径 Y"~gw~7OD  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) G&i!Hs  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 8zRP(+&W  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 9fhsIe  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) PmKeF}  
Dim bb(5) As Single np8gKVD  
  bb(1) = rr1 \HKxh:F'  
  bb(2) = rr2 )TVFtI=,NN  
  bb(3) = rr3 Nd$W0YN:  
  bb(4) = rr4 hp#W9@NR  
  nb = rr1
K POa|$  
For i = 1 To 4 yzerOL  
    If nb <= bb(i) Then wN;^[F  
       nb = bb(i) d8[J@M53|T  
    End If K_RjX>q%N  
Next i M%ICdIc'  
    rt(0) = Sqr(nb) h|,:e;>}  
    rr = rt() _H j!2 '  
  End If LIcM3_.  
         n?- })  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  C71qPb|$R  

s$Z _48  
有热压工艺方面的人才或者资料分享下； 9~]~#Uj  
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 YjxF}VI~<  

高手真多！

楼主威武霸气.