[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： -Sj|Y}  
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关键点说几个： R3@$ao  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） lAx^!#
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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 :LBRyBV  
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 5<L+T  

以下是几个重要的函数： ,xsFBNCC  
1.判断点在区域中函数 6$*Z
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2.计算夹角函数 uj9IK  
3.转置函数 WEFvJ0]  
4.得到区域中心点，及区域半径函数 $oU40HA)W]  
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） Uk|(VR9  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 V8{5 y <Y>  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single sX$EdIq  
   cax = x2 - x1 c>nXnN  
   cay = y2 - y1 W_ hckq.  
   cbx = x2 - x3 ({_Dg43O'[  
   cby = y2 - y3 U$5 lh  
   mo_jj = cax * cbx + cay * cby `cBV+00YS  
   mo_ca = Sqr(cax * cax + cay * cay) &?mJL0fy  
   mo_cb = Sqr(cbx * cbx + cby * cby) m}dO\;  
   cos_acb = mo_jj / (mo_ca * mo_cb) ;.4A,7w#  
   'ff_cos = cos_acb b
5X~^L  
   If cos_acb >= 1 Then '8b/TL  
   nn = 0 pk0Cx  
   ElseIf cos_acb <= -1 Then 1hn4YcHb  
   nn = 3.14159265258979 "=97:H{!  
   Else o<r|YRzQl  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ` kG}NJf  
   End If Vx6/Rehj  
   'ff_angle = nn nR1QS_@{L  
   ff_angle = nn * 180 / 3.14159265258979 1IRlFC  
End Function

'判断点在区域内函数 5}uH;E)4  
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 _z$lg]q  
Dim aob, boc, cod, doa, sum As Single ] 3@.)  
  If ppx = p1x And ppy = p1y Then |E YJbL;1%  
     point_in = True `Y~EL?
 
     Exit Function lnk`D(>W  
  End If vxRy7:G"  
  If ppx = p2x And ppy = p2y Then Uz`K#Bz   
     point_in = True z!r-g(^G  
     Exit Function Gx]J6Z8  
  End If i,Q{Z@,  
   If ppx = p3x And ppy = p3y Then jeM/8~^4-  
     point_in = True EGZF@#N  
     Exit Function YGj3W.eH  
  End If ktILKpHt"  
     u
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    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) _ xAL0 (  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Wx<fD()  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Vg0$5@  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) EN =oA P  
    sum = aob + boc + cod + doa 5ZRO{rf  
    If 360.01 > sum And sum > 359.99 Then &GC`4!H  
       point_in = True g0P^O@8  
    Else &F*L=Ng  
       point_in = False Sj$XRkbj:  
    End If 8d90B9  
End Function

'得到点半径,得到交点坐标函数 xMAfa>]{n  
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() a5v}w7vL
 
    '求得中心点坐标 5w\>Whbd  
Dim tt As String H>x(c|ZBp  
Dim rt(3) As Single bvf}r ,`Q7  
    '判断是否平行 cBl F  
   acx = p3x - p1x PfaBzi9?f  
   acy = p3y - p1y SxHj3,`#C  
   bdx = p4x - p2x GvL)SVv?  
   bdy = p4y - p2y \BV$p2m5-  
   If acx * bdy = acy * bdx Then NDJIaX:]  
      rt(0) = 0 #+vIq?  
      Exit Function ]"jJgO^  
   Else Ye'=F  
      '判断斜率存在否 oJcDs-!  
      If p1x = p3x And p2x <> p4x Then L8&$o2+07r  
         tt = "ac_n_bd_y" l Ikh4T6i  
      ElseIf p1x <> p3x And p2x = p4x Then
D5wy7`c  
         tt = "ac_y_bd_n" e;y\v/A  
      ElseIf p1x <> p3x And p2x <> p4x Then zHI_U\"8D  
         tt = "ac_y_bd_y" jm_b3!J  
      End If 1keH1[  
    Select Case tt IA\CBwiLj  
         Case "ac_n_bd_y" JMMT886  
            'bd线段方程 gy Jx>i  
            k_bd = bdy / bdx hPs7mnSW  
            b_bd = p2y - k_bd * p2x ~w&P]L\dB  
            p_x = p1x ;b(*Bh<  
            p_y = k_bd * p_x + b_bd -R^OYgF  
         Case "ac_y_bd_n" #}/YnVk  
            'ac线段方程 3;wAm/Z:Q  
            k_ac = acy / acx p[Pa(a,B7  
            b_ac = p1y - k_ac * p1x ionFP
c].  
            p_x = p2x wj-=#gyAoo  
            p_y = k_ac * p_x + b_ac e/pZLj]M  
        Case "ac_y_bd_y" He#5d!cf:M  
           'ac，bd线段都要求 V &K:~[M  
           k_ac = acy / acx OJ (ho&((  
           b_ac = p1y - k_ac * p1x MZyzc{c,  
           k_bd = bdy / bdx wA+QUN3#n  
           b_bd = p2y - k_bd * p2x Hm>M}MF3  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) or?@Ti;  
           p_y = k_ac * p_x + b_ac C@{#OOa  
        End Select <oweLRt  
      rt(1) = p_x ~ .}  
      rt(2) = p_y OF$0]V  
     Htg,^d 5  
'计算最大半径 {XT3M{`rWL  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 8oM]gW;J~  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) }:5_vH0  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) =K
q/EDe  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) B0_[bQoc1  
Dim bb(5) As Single &+@~;p5F  
  bb(1) = rr1 ]bjXbbHd  
  bb(2) = rr2 334UMH__  
  bb(3) = rr3 ^6tcB* #A  
  bb(4) = rr4 lzJ[`i.  
  nb = rr1 >zYO1.~  
For i = 1 To 4 ]}KoW?M
 
    If nb <= bb(i) Then
5H (CP  
       nb = bb(i) v!\\aG/  
    End If s:_M+_7_  
Next i K4]42#
  
    rt(0) = Sqr(nb) +(v<_#wR-  
    rr = rt() 8db J'  
  End If H3$~S '  
         4 1w*<{Lk  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  {}Y QB'}  

>>lT-w  
有热压工艺方面的人才或者资料分享下； _Je k;N  
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 q6Q;9,  

高手真多！

楼主威武霸气.