[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： dIW@L  
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图片:2.jpg

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关键点说几个： z%S$~^=b  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Bm
Kf%:l}  
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 7Xx3s@  
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 f0vO(@I  

以下是几个重要的函数： n&Ckfo_D  
1.判断点在区域中函数 D'<L6w`  
2.计算夹角函数 <3!Al,!ej@  
3.转置函数 fGb}V'x}r  
4.得到区域中心点，及区域半径函数 8T1zL.u>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） s3eS` rK-  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 )i}j\";>L  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single =B9-}]DDO  
   cax = x2 - x1 PQDLbSe)\  
   cay = y2 - y1 
p;>A:i  
   cbx = x2 - x3 kh9'W<tE  
   cby = y2 - y3 3("C'(W  
   mo_jj = cax * cbx + cay * cby g35!a<JW  
   mo_ca = Sqr(cax * cax + cay * cay) nm@
h5ON_  
   mo_cb = Sqr(cbx * cbx + cby * cby) [a04
( 2g  
   cos_acb = mo_jj / (mo_ca * mo_cb) h<e  
   'ff_cos = cos_acb kzKej"a;  
   If cos_acb >= 1 Then db~^Gqv6k  
   nn = 0 7Y9#y{v1  
   ElseIf cos_acb <= -1 Then /QY F|%7!  
   nn = 3.14159265258979 )[ A-d(y=  
   Else
Yy88 5  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) *{3d+j/?/  
   End If qtExd~E  
   'ff_angle = nn J-hJqR*;K  
   ff_angle = nn * 180 / 3.14159265258979 T9 /;$6s*  
End Function

'判断点在区域内函数 k ucbI_  
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 qD{1X25O  
Dim aob, boc, cod, doa, sum As Single Ipk;Nq  
  If ppx = p1x And ppy = p1y Then }:0_%=)N<  
     point_in = True wb0$FZzh  
     Exit Function {V6&((E8  
  End If Ca|egQv  
  If ppx = p2x And ppy = p2y Then |}z)>E  
     point_in = True wM+1/[7  
     Exit Function /W/e%.  
  End If Co1d44Q  
   If ppx = p3x And ppy = p3y Then X:oOp=y]|  
     point_in = True oX|T&"&  
     Exit Function G:<f(Gy  
  End If <rBW6o7  
     Y;/@[AwF  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) fB8, )&  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) h3o'T=`Sm  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) d=D-s  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) $*ff]>#  
    sum = aob + boc + cod + doa jr=9.=jI8k  
    If 360.01 > sum And sum > 359.99 Then hzo> :U  
       point_in = True x4WCAqi/2  
    Else ubwM*P  
       point_in = False aV\i3\da  
    End If n9B5D:.G  
End Function

'得到点半径,得到交点坐标函数 MTu\T  
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() ?()*"+N(ck  
    '求得中心点坐标 B[N]=V  
Dim tt As String M~A#_%2U  
Dim rt(3) As Single q`9.@u@a  
    '判断是否平行 -8 uS#  
   acx = p3x - p1x zjmoIE  
   acy = p3y - p1y =A'>1N  
   bdx = p4x - p2x P T;{U<5  
   bdy = p4y - p2y EpS/"adI-!  
   If acx * bdy = acy * bdx Then 0>28o.  
      rt(0) = 0 ^B<-.(F  
      Exit Function /HdXJL9B  
   Else 9^a|yyzL  
      '判断斜率存在否 `=(<!nXJx  
      If p1x = p3x And p2x <> p4x Then 1aAOT6h  
         tt = "ac_n_bd_y" =t,oj6P~  
      ElseIf p1x <> p3x And p2x = p4x Then W`[VLi}fe  
         tt = "ac_y_bd_n" 2u]G]:ml  
      ElseIf p1x <> p3x And p2x <> p4x Then pr<u 5  
         tt = "ac_y_bd_y" f)Qln[/  
      End If !]F`qS>  
    Select Case tt Xh8U}w<k6  
         Case "ac_n_bd_y" > "hP  
            'bd线段方程 HxO+JI`'3  
            k_bd = bdy / bdx d]E=w6+;Q  
            b_bd = p2y - k_bd * p2x &{Z+p(3Gj  
            p_x = p1x nE]rPRU}[  
            p_y = k_bd * p_x + b_bd HhynU/36  
         Case "ac_y_bd_n" bW
`nLiw}%  
            'ac线段方程 ntIR#fB  
            k_ac = acy / acx Bl+\|[yd  
            b_ac = p1y - k_ac * p1x -5*OSA:8x  
            p_x = p2x 1
)~|{X+~  
            p_y = k_ac * p_x + b_ac QBa+xI_ J  
        Case "ac_y_bd_y" -C2!`/
U  
           'ac，bd线段都要求 jRsl/dmy  
           k_ac = acy / acx [A~?V.G  
           b_ac = p1y - k_ac * p1x kXL0  
           k_bd = bdy / bdx mZiKA-t  
           b_bd = p2y - k_bd * p2x lat5n&RP Y  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 0Z2XVq~T$  
           p_y = k_ac * p_x + b_ac 2bCfY\k  
        End Select S<T'B0r8  
      rt(1) = p_x w[GEm,ZC  
      rt(2) = p_y ;pm/nu  
     ]y#'U  
'计算最大半径 H'i\N?VL  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 
]Gi&:k  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) &<><4MQ  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) R
y+?#P+  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) g%J\YRo  
Dim bb(5) As Single E:qh}wY  
  bb(1) = rr1 Wrp~OF0k  
  bb(2) = rr2 lW"0fZ_x'E  
  bb(3) = rr3 ?GX@&_
  
  bb(4) = rr4 6|=]i-8  
  nb = rr1 ^P,Pj z  
For i = 1 To 4 @G;9eh0$  
    If nb <= bb(i) Then l$5nv5
r  
       nb = bb(i) 4V9BmVS|Th  
    End If m^FKE:  
Next i ViW2q"4=  
    rt(0) = Sqr(nb) *-ys}sX  
    rr = rt() %f<>Kwr`2  
  End If 8Y-*rpLy  
         0=&S?J#!  
End Function

高手啊.人才啊.

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

$,O8SW.O$  
有热压工艺方面的人才或者资料分享下； ,<!*@xy7v  
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 OLt0Q.{  

高手真多！

楼主威武霸气.