[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： *l7 ojv  
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关键点说几个： DbOWnXV"o  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ;| \Ojuf  
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 C 
#TS  
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 Cs*u{O  

以下是几个重要的函数： nnr(\r~  
1.判断点在区域中函数 kyY tL_SD  
2.计算夹角函数 uV%7|/fD  
3.转置函数 $e<3z6  
4.得到区域中心点，及区域半径函数 ~G"6^C:x  
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） ;itz`9T  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 DmD*,[rD  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single .Olq_wuH  
   cax = x2 - x1 vH7"tz&RIp  
   cay = y2 - y1 se(_`a/4Q  
   cbx = x2 - x3 f#mY44:,C  
   cby = y2 - y3 'VO^H68  
   mo_jj = cax * cbx + cay * cby QEtZ]p1H@  
   mo_ca = Sqr(cax * cax + cay * cay) Vl'|l)b4W  
   mo_cb = Sqr(cbx * cbx + cby * cby) n]_8!NU  
   cos_acb = mo_jj / (mo_ca * mo_cb) lfWxdi  
   'ff_cos = cos_acb JY%c<  
   If cos_acb >= 1 Then 
"3}Bv X  
   nn = 0 c t,p?[Q  
   ElseIf cos_acb <= -1 Then 3:);vh!  
   nn = 3.14159265258979 {mueP6Gz@J  
   Else t;E-9`N  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Pm;"Y!S<  
   End If x{&Z|D_CM  
   'ff_angle = nn +]*?J1Y8Z  
   ff_angle = nn * 180 / 3.14159265258979 L6U[H#3(  
End Function

'判断点在区域内函数 Ok O;V6`  
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 +mV4T
y  
Dim aob, boc, cod, doa, sum As Single ggX'`bK  
  If ppx = p1x And ppy = p1y Then L42C<  
     point_in = True SAXjB;VH6  
     Exit Function rWSw1(sAA  
  End If }&;0:hw%  
  If ppx = p2x And ppy = p2y Then [)9bR1wh  
     point_in = True nvpdu)q<  
     Exit Function d<: VoQM6M  
  End If 0$* z   
   If ppx = p3x And ppy = p3y Then %n!s{5:F  
     point_in = True }%_x T  
     Exit Function O^oFH OpFh  
  End If g4%x7#vz0  
     ;>|:I(l;  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 9k2HP]8=[{  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) mVU(u_lh  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) mKWA-h+f  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) U
3%!#E{  
    sum = aob + boc + cod + doa UHweV:(|T  
    If 360.01 > sum And sum > 359.99 Then 8|V6RgA%  
       point_in = True >^> \y8on  
    Else (zye Ch  
       point_in = False >iWl-hI-  
    End If sStaTR{  
End Function

'得到点半径,得到交点坐标函数 #.a4}ya19  
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() LK/gG6n5M0  
    '求得中心点坐标 <hQ@]2w$  
Dim tt As String &l{yEWA}g  
Dim rt(3) As Single b"x;i\Z0%  
    '判断是否平行 T(7 8{A>  
   acx = p3x - p1x 18V*Cu  
   acy = p3y - p1y 8uS1HE\%  
   bdx = p4x - p2x #j iQa"  
   bdy = p4y - p2y VLu_SXlo*  
   If acx * bdy = acy * bdx Then M)Tv(7  
      rt(0) = 0 D-A#{e _  
      Exit Function m7^a4  
   Else Lm:O vVVB  
      '判断斜率存在否 GAtK1%nPD  
      If p1x = p3x And p2x <> p4x Then U-X  
         tt = "ac_n_bd_y" m'oVqA&  
      ElseIf p1x <> p3x And p2x = p4x Then lb`P9mbr+  
         tt = "ac_y_bd_n" sVaWg?=qs'  
      ElseIf p1x <> p3x And p2x <> p4x Then JB''Ujyi  
         tt = "ac_y_bd_y" ^fXNeBj  
      End If 241YJ  
    Select Case tt E)H8jBm6w  
         Case "ac_n_bd_y" `k_5Pz\  
            'bd线段方程 $:/y5zi  
            k_bd = bdy / bdx dFo9O!YX[f  
            b_bd = p2y - k_bd * p2x {3`#? q^o'  
            p_x = p1x aW4tJN%!  
            p_y = k_bd * p_x + b_bd #B)/d?aa'  
         Case "ac_y_bd_n" 76$19  
            'ac线段方程 Y\sLwLLlG  
            k_ac = acy / acx G\Toi98d*  
            b_ac = p1y - k_ac * p1x uSM4:!8  
            p_x = p2x X f!Bsp#\g  
            p_y = k_ac * p_x + b_ac <74q]C
 
        Case "ac_y_bd_y" z`>a,X
 
           'ac，bd线段都要求 r"Pj,}$A  
           k_ac = acy / acx 2~Gcoda  
           b_ac = p1y - k_ac * p1x ~e,  
           k_bd = bdy / bdx g4RkkoZ>)  
           b_bd = p2y - k_bd * p2x S)@R4{=e"V  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) +7N6]pK|"  
           p_y = k_ac * p_x + b_ac \QHe0?6  
        End Select cJj0`@0f  
      rt(1) = p_x Ai(M06P:h  
      rt(2) = p_y jr"yIC_  
     7<|1 xOT  
'计算最大半径 ')Ozz<{  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) (RWZ[-;)  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) =lr*zeHLC  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) NT= ?@ux
D  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) G*\wu&7!  
Dim bb(5) As Single ( F0.lDZ  
  bb(1) = rr1 m\"M`o B  
  bb(2) = rr2 3
f eI   
  bb(3) = rr3 WI[6l6  
  bb(4) = rr4 dZ`nv[]k~  
  nb = rr1 RvYew!n  
For i = 1 To 4 2s?j5 Sd  
    If nb <= bb(i) Then K]N^6ome  
       nb = bb(i)
hSp[BsF`,  
    End If Dn<2.!ZKQ  
Next i "*kWM  
    rt(0) = Sqr(nb) |KplbU0iC  
    rr = rt() C&zgt :q6}  
  End If htMsS4^Kvd  
         @T?:[nPf&F  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  k+JDbJ@  

amlE5GK;  
有热压工艺方面的人才或者资料分享下； QOy+T6en  
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 b==<7[8  

高手真多！

楼主威武霸气.