[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： JeA_mtSQ|  
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关键点说几个： _g,_G  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Q:b0!  
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 A* Pz-z>z  
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 %,aSD#l`f  

以下是几个重要的函数： [ <k&]Kv  
1.判断点在区域中函数 U!JmSP  
2.计算夹角函数 Vh]=sd<F  
3.转置函数 H6`zzH0"  
4.得到区域中心点，及区域半径函数 Y@T$O<*  
5.再有就是若干个点抽取其中一部分；或者采用随机分布（该方法会有重合点，所以没采用） +[$Td%6  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ~SsfkM"  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single |W&K@g$  
   cax = x2 - x1 rL?{+S]&^)  
   cay = y2 - y1 n3 Rf:j^R  
   cbx = x2 - x3 !<b+7A  
   cby = y2 - y3 ]"j%:fr  
   mo_jj = cax * cbx + cay * cby 4! F$nmG)  
   mo_ca = Sqr(cax * cax + cay * cay) /sPa$D  
   mo_cb = Sqr(cbx * cbx + cby * cby)
{>TAnb?n  
   cos_acb = mo_jj / (mo_ca * mo_cb) _)4zm  
   'ff_cos = cos_acb %>y!N!.F  
   If cos_acb >= 1 Then Hd gABIuX  
   nn = 0 f
3:dn7  
   ElseIf cos_acb <= -1 Then L},o;p:  
   nn = 3.14159265258979 XjxI@VXzUV  
   Else I7t}$S6  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) }wEt=zOJ  
   End If &W&A88FfZU  
   'ff_angle = nn IA}.{zY~|  
   ff_angle = nn * 180 / 3.14159265258979 0TiDQ4}i[  
End Function

'判断点在区域内函数 ]xIgP%  
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 ~i>'3j0@k  
Dim aob, boc, cod, doa, sum As Single |t#s h  
  If ppx = p1x And ppy = p1y Then L%pAEoSG  
     point_in = True sp0_f;bC  
     Exit Function :cP u  
  End If Z1(!syg  
  If ppx = p2x And ppy = p2y Then K;TTGK  
     point_in = True |47 2X&e  
     Exit Function =Fq{#sC>  
  End If x'%vL",%  
   If ppx = p3x And ppy = p3y Then : >$v@d  
     point_in = True /~?[70B}E  
     Exit Function 1Eryw~,,9i  
  End If PX?^v8wlqL  
     R m2M  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) l[nf"'  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) jo0
XOs  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) s;tI?kR>%  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) Jr>Nc}!U  
    sum = aob + boc + cod + doa NG4@L1f%  
    If 360.01 > sum And sum > 359.99 Then X'2%'z<  
       point_in = True ^6!8)7b  
    Else =Prz|
 
       point_in = False ~4ijiw$  
    End If NpGz y`&b  
End Function

'得到点半径,得到交点坐标函数 B{V(g"dM  
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() T7M];@q  
    '求得中心点坐标 a6/ETQ  
Dim tt As String 2k`Q+[?{q>  
Dim rt(3) As Single O@LUM{\  
    '判断是否平行 q+XU Cnv  
   acx = p3x - p1x X8XE_VtP  
   acy = p3y - p1y 9a'}j#mJo  
   bdx = p4x - p2x
:1#$p  
   bdy = p4y - p2y yv> 6u7  
   If acx * bdy = acy * bdx Then Q:Y`^jP   
      rt(0) = 0 F}5skD=  
      Exit Function ]v$2JgF]@  
   Else O%Qz6R  
      '判断斜率存在否 +#@2,  
      If p1x = p3x And p2x <> p4x Then (IAR-957pN  
         tt = "ac_n_bd_y" h>/L4j*Z  
      ElseIf p1x <> p3x And p2x = p4x Then !Jaj2mS.N  
         tt = "ac_y_bd_n" df$pT?o  
      ElseIf p1x <> p3x And p2x <> p4x Then ]pVuRj'pP  
         tt = "ac_y_bd_y" 9;A9Q9Yr  
      End If '5 9{VA6h  
    Select Case tt NRe=O*O  
         Case "ac_n_bd_y" X>MDX.Z  
            'bd线段方程 _wZr`E)  
            k_bd = bdy / bdx : p7PiqQ  
            b_bd = p2y - k_bd * p2x &tlU.Whk+  
            p_x = p1x m;u:_4  
            p_y = k_bd * p_x + b_bd \YH*x`  
         Case "ac_y_bd_n" X@~R<  
            'ac线段方程 ^pocbmg  
            k_ac = acy / acx \Iz-<:gA'  
            b_ac = p1y - k_ac * p1x ZVCa0Km  
            p_x = p2x Z%VgAV>>  
            p_y = k_ac * p_x + b_ac NcIr; }  
        Case "ac_y_bd_y" VS5D)5w#  
           'ac，bd线段都要求 1_)Y{3L  
           k_ac = acy / acx Dwah_ p8  
           b_ac = p1y - k_ac * p1x !LpFK0rw  
           k_bd = bdy / bdx 0}$R4<"{Y>  
           b_bd = p2y - k_bd * p2x :U'Oc3l#Y  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) XC,by&nY<y  
           p_y = k_ac * p_x + b_ac -qB{TA-.\  
        End Select F'njtrO3  
      rt(1) = p_x e]7J_9t@  
      rt(2) = p_y h{e?Fl  
     #2qv"ntW  
'计算最大半径
Z7dVy8J  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 12bztlv  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ],f%: ?%50  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) L^jhr>-";  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 
-$(2Z[  
Dim bb(5) As Single B|-W  
  bb(1) = rr1 5Ja[p~^
L  
  bb(2) = rr2 ?#u_x4==e  
  bb(3) = rr3 DA/\[w?J  
  bb(4) = rr4 Kd3EZo.  
  nb = rr1 p+:MZP -%(  
For i = 1 To 4 8s6^!e&  
    If nb <= bb(i) Then dijHi  
       nb = bb(i) U5H5QW+  
    End If bbFzmS1  
Next i (.9H1aO46|  
    rt(0) = Sqr(nb) j4eq.{$  
    rr = rt() +Pb@@C&  
  End If qk!,:T  
         =b#,OXQ  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  K&/!3vc  

]ag^~8bG @  
有热压工艺方面的人才或者资料分享下； OiMr,  
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 ='\E+*[$I  

高手真多！

楼主威武霸气.