[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： QRx9;!~b}  
WHqw=!G  
0EasPbp  

关键点说几个： |[p]])
o  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） *\_>=sS x;  
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 5=fS^]- F  
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 p&\DG  

以下是几个重要的函数： VA`VDUG,  
1.判断点在区域中函数 4;(W0RQa  
2.计算夹角函数 @1qdnU  
3.转置函数 lanU)+U.  
4.得到区域中心点，及区域半径函数 \w&R`;b8w  
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） _n4_;0  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 5g;mc.Cvt  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single of >  
   cax = x2 - x1 o)Px d  
   cay = y2 - y1 m
R|']^!SE  
   cbx = x2 - x3 C0khG9,BL  
   cby = y2 - y3  Y=H_U$  
   mo_jj = cax * cbx + cay * cby gc b8eB,  
   mo_ca = Sqr(cax * cax + cay * cay) E_P,>f  
   mo_cb = Sqr(cbx * cbx + cby * cby) Hq&MePl[  
   cos_acb = mo_jj / (mo_ca * mo_cb) 9|NF)~Q}'  
   'ff_cos = cos_acb ')iyD5/4  
   If cos_acb >= 1 Then L-m' #  
   nn = 0 ZTj!ti;5  
   ElseIf cos_acb <= -1 Then {bC(>k|CQ  
   nn = 3.14159265258979 k4!p))ql  
   Else 1uEM;O  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) F3 g$b,RMH  
   End If z uo:yaO  
   'ff_angle = nn |`|zo+aW  
   ff_angle = nn * 180 / 3.14159265258979 j'Gezx^.<e  
End Function

'判断点在区域内函数 qZlL6  
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 c0_512  
Dim aob, boc, cod, doa, sum As Single @udc
/J$  
  If ppx = p1x And ppy = p1y Then YllW2g:  
     point_in = True ?\<Kb|Q  
     Exit Function 9U@>&3[v  
  End If j*~z.Q|  
  If ppx = p2x And ppy = p2y Then Z}IuR|=  
     point_in = True 7c<_j55(  
     Exit Function > lI2r}  
  End If )Q<u0AxAn  
   If ppx = p3x And ppy = p3y Then gRw? <U^  
     point_in = True -AQ 7Bd  
     Exit Function Ss1&fZoj  
  End If \SWuylE  
     ' R= OeH  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) rT
;_"y
}  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) D+h`Z]"|  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) COxJ,v(  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ,8DjQz0ZPo  
    sum = aob + boc + cod + doa xj5MKX{CJT  
    If 360.01 > sum And sum > 359.99 Then y+7A?"s)  
       point_in = True kZcGe*  
    Else ^~3{n  
       point_in = False :Yi 4Ia  
    End If u~Y+YzCxV  
End Function

'得到点半径,得到交点坐标函数 iP?lP= M  
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() b\xse2#  
    '求得中心点坐标 NH,4>mV$!  
Dim tt As String C-(O*hK  
Dim rt(3) As Single 3IoN.  
    '判断是否平行 h
3p~\%^  
   acx = p3x - p1x 1R#1Fy%  
   acy = p3y - p1y uTmT'u:}  
   bdx = p4x - p2x h~#.s*0.F  
   bdy = p4y - p2y :|=Xh"l"  
   If acx * bdy = acy * bdx Then *{=q:E$  
      rt(0) = 0 ]w!=1(  
      Exit Function &Z+.FTo  
   Else qITd.< k  
      '判断斜率存在否 "@itn  
      If p1x = p3x And p2x <> p4x Then Jx8DVjy  
         tt = "ac_n_bd_y" oho~?.F  
      ElseIf p1x <> p3x And p2x = p4x Then {HP.H
K  
         tt = "ac_y_bd_n" jG,^~5x  
      ElseIf p1x <> p3x And p2x <> p4x Then x' 3kHw  
         tt = "ac_y_bd_y" ?9z1'6  
      End If N&W7g#F  
    Select Case tt rTeADu_vf  
         Case "ac_n_bd_y" w)}@svv"  
            'bd线段方程 sP%J`L@h  
            k_bd = bdy / bdx FNXVd/{M3  
            b_bd = p2y - k_bd * p2x B(pHo&ox  
            p_x = p1x K$-|7tJon  
            p_y = k_bd * p_x + b_bd .X6V>e)(3  
         Case "ac_y_bd_n" ^K!R4Y4t  
            'ac线段方程 ZIaFvm&q7Z  
            k_ac = acy / acx ,fyqa  
            b_ac = p1y - k_ac * p1x w)Y}hlcq  
            p_x = p2x V`LW~P;  
            p_y = k_ac * p_x + b_ac qjIcRue'"  
        Case "ac_y_bd_y" WZ ,t~TN  
           'ac，bd线段都要求 K(}<L-cv  
           k_ac = acy / acx /O$)m[  
           b_ac = p1y - k_ac * p1x dkOERVRe  
           k_bd = bdy / bdx 7 '7a`-W  
           b_bd = p2y - k_bd * p2x ''CowI  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) cqb]L
C  
           p_y = k_ac * p_x + b_ac pEiq;2{~Yn  
        End Select -V}ZbXJD  
      rt(1) = p_x 4,ewp coC%  
      rt(2) = p_y &0J/V>k  
     P)hawH=  
'计算最大半径 Jl89}Sf  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) lziC.Dpa  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) i$4lBy_2  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) s9BdmD^|#  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) *q(H
W  
Dim bb(5) As Single 2$oGy  
  bb(1) = rr1 ^4>Icz^ F  
  bb(2) = rr2 )auuk<  
  bb(3) = rr3 |1Ko5z  
  bb(4) = rr4 -o sxKT:  
  nb = rr1 9;EY3[N  
For i = 1 To 4 ~Nl`Zmn(A|  
    If nb <= bb(i) Then A;Uw b  
       nb = bb(i) 5>M@ F0  
    End If QEl~uhc3  
Next i l,1.6  
    rt(0) = Sqr(nb) PX,fg5s\b  
    rr = rt() edh<L/%D  
  End If pPZ^T5-ks  
         )hK1W\5  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  o<-+y\J8K  

?
V&[U  
有热压工艺方面的人才或者资料分享下； >, }m=X8  
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 "i_}\p.,X  

高手真多！

楼主威武霸气.