[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： u]jvXPE6  
<jIuVX  

描述:请输入描述

图片:2.jpg

gN5;Uk  

关键点说几个： Pm==m9  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） %1z`/B  
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 xY<*:&  
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 `IH*~d]  

以下是几个重要的函数： h_\OtoRa  
1.判断点在区域中函数 e1Bqd+  
2.计算夹角函数 JGQ)/(  
3.转置函数 jYE ?wc+FT  
4.得到区域中心点，及区域半径函数 !<= ^&\A  
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） aqKrf(Rv  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 A}G>JL  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single wPl9%  
   cax = x2 - x1 A O3MlK9t  
   cay = y2 - y1 $aDk
Zj  
   cbx = x2 - x3 8B7~Nq'  
   cby = y2 - y3 UNyk, #4  
   mo_jj = cax * cbx + cay * cby 1R"Z+tNB  
   mo_ca = Sqr(cax * cax + cay * cay) I\Pw`  
   mo_cb = Sqr(cbx * cbx + cby * cby) e|eWV{Dsz  
   cos_acb = mo_jj / (mo_ca * mo_cb) q*7:L  
   'ff_cos = cos_acb G!E1N(%o  
   If cos_acb >= 1 Then UAOH9*9*  
   nn = 0 8XD_p);Oy  
   ElseIf cos_acb <= -1 Then F5%I
sAH  
   nn = 3.14159265258979 Vu;z|L  
   Else cHX~-:KOr  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) X][=(l!;w7  
   End If ] D+'Ao^'  
   'ff_angle = nn cXbQ  
   ff_angle = nn * 180 / 3.14159265258979 jPEOp#C  
End Function

'判断点在区域内函数 qKk|2ecTB5  
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 w3jcit|  
Dim aob, boc, cod, doa, sum As Single b=XHE1^rM  
  If ppx = p1x And ppy = p1y Then ]}L tf,9  
     point_in = True Xp0S  
     Exit Function  _:HQ4s@  
  End If |Q$9I#rv  
  If ppx = p2x And ppy = p2y Then aRcVoOq  
     point_in = True k:#u%Z   
     Exit Function gmN$}Gy}  
  End If C=`MzZbJ  
   If ppx = p3x And ppy = p3y Then <ToRPx&E  
     point_in = True oW3|b2D  
     Exit Function Dr5AJ`y9A  
  End If  =h|xlT  
     v0KJKrliGO  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) lQ#='Jqfp  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Zw_'u=r >  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) d0;<Cw~Tl  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) qe|U*K 2_  
    sum = aob + boc + cod + doa /&W~:F  
    If 360.01 > sum And sum > 359.99 Then remRmY?  
       point_in = True nIGElt]  
    Else IGF25-7B  
       point_in = False C sCH :>  
    End If .zsYV
tK  
End Function

'得到点半径,得到交点坐标函数 .+&M,% x  
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() 8/R9YiY5*  
    '求得中心点坐标 #@J{ )  
Dim tt As String a(lmm@;V<  
Dim rt(3) As Single F8|m i`f-  
    '判断是否平行 :Z+Jt=;  
   acx = p3x - p1x .yB{+  
   acy = p3y - p1y =3EjD;2  
   bdx = p4x - p2x Y(=A HmR  
   bdy = p4y - p2y [F 24xC+  
   If acx * bdy = acy * bdx Then 6N[X:F 3`,  
      rt(0) = 0 -Eoq#ULvR  
      Exit Function * 'Bu-
1{  
   Else !o\e/HGc!  
      '判断斜率存在否 *z&hXYm  
      If p1x = p3x And p2x <> p4x Then sQn@:Gk  
         tt = "ac_n_bd_y" pO)5NbU  
      ElseIf p1x <> p3x And p2x = p4x Then 8khIy-9-'  
         tt = "ac_y_bd_n" eVj7%9  
      ElseIf p1x <> p3x And p2x <> p4x Then KPA.5,ai  
         tt = "ac_y_bd_y" a#a n+JY3  
      End If $hy0U_}6  
    Select Case tt hGR
Hu
J  
         Case "ac_n_bd_y" K94bM5O 1  
            'bd线段方程 vbfQy2q  
            k_bd = bdy / bdx }6gum  
            b_bd = p2y - k_bd * p2x (*9-
Fa  
            p_x = p1x L;v.X'f  
            p_y = k_bd * p_x + b_bd &r2\P6J  
         Case "ac_y_bd_n" tGF3Hw^mS  
            'ac线段方程 xtut S  
            k_ac = acy / acx biENRJQ.  
            b_ac = p1y - k_ac * p1x S|F:[(WaM  
            p_x = p2x A=wG};%_  
            p_y = k_ac * p_x + b_ac 'V\V=yc1  
        Case "ac_y_bd_y" &0]5zQ  
           'ac，bd线段都要求 6FY.kN\  
           k_ac = acy / acx bnJ4Ed
y  
           b_ac = p1y - k_ac * p1x tVh"C%Vkr  
           k_bd = bdy / bdx &Bqu2^^  
           b_bd = p2y - k_bd * p2x $laUkD#vz  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) J?Oeuk~[D  
           p_y = k_ac * p_x + b_ac z0Z1J8Qq6.  
        End Select FH%M5RD  
      rt(1) = p_x 5v^tPGg4  
      rt(2) = p_y a'A<'(yv  
     45&Rl,2  
'计算最大半径 / }*}r  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) sKk+^.K}|  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ';v1AX}5q  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) BN~ndWRK  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 4W}mPeEeV  
Dim bb(5) As Single .y lv
J$  
  bb(1) = rr1 qae|?z  
  bb(2) = rr2 MGY0^6yK5  
  bb(3) = rr3 '_5|9 }  
  bb(4) = rr4 0o:R:*  
  nb = rr1 F|@\IVEB]  
For i = 1 To 4 Vcnc=ct  
    If nb <= bb(i) Then v7\rW{~Jd&  
       nb = bb(i)
BGHZL~  
    End If P](
8Qrl  
Next i pw`'q(ad  
    rt(0) = Sqr(nb) ;#9ioGx  
    rr = rt() %0 i)l|  
  End If O<E8,MCA[a  
         +(y8q  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  )$bF*  

y<6c*e1  
有热压工艺方面的人才或者资料分享下； _+NjfF|  
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 [l3\0
e6-/  

高手真多！

楼主威武霸气.