[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： %/^kr ZD  
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描述:请输入描述

图片:2.jpg

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关键点说几个： m-SP#?3  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） %HRFH  
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 -zeodv7  
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 doCWJ   

以下是几个重要的函数： =5P_xQx  
1.判断点在区域中函数 ."m6zq  
2.计算夹角函数 67I6]3[Z  
3.转置函数 u_aln[oIv  
4.得到区域中心点，及区域半径函数 (%fl  
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） o:\RJig<  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 $'f<4  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single (~oUd4  
   cax = x2 - x1 -aiQp@^/J  
   cay = y2 - y1 n:?fv=9n  
   cbx = x2 - x3 j+3~  
   cby = y2 - y3 \lKiUy/  
   mo_jj = cax * cbx + cay * cby a;Ic!:L
 
   mo_ca = Sqr(cax * cax + cay * cay) /Yk2 |L  
   mo_cb = Sqr(cbx * cbx + cby * cby) IMY?L  
   cos_acb = mo_jj / (mo_ca * mo_cb) %$j)?e  
   'ff_cos = cos_acb .>0e?A4,5?  
   If cos_acb >= 1 Then -ob_]CKtJ~  
   nn = 0 s-eC')w~E  
   ElseIf cos_acb <= -1 Then LxkToO{  
   nn = 3.14159265258979 d\`A ^  
   Else %S8e:kc6  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) :GC<U|p  
   End If 8T'=lTJ  
   'ff_angle = nn N2_j[Pe  
   ff_angle = nn * 180 / 3.14159265258979 W[o~AbU  
End Function

'判断点在区域内函数 OpY2Z7_  
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'  
Dim aob, boc, cod, doa, sum As Single (LPMEQhI:  
  If ppx = p1x And ppy = p1y Then -zg,pK$+  
     point_in = True 1
)u 3  
     Exit Function 2O {@W +Mt  
  End If KyW6[WA9  
  If ppx = p2x And ppy = p2y Then FG7}MUu  
     point_in = True ?eT
^gWX  
     Exit Function /-<S F
T`  
  End If `G\uTCpk  
   If ppx = p3x And ppy = p3y Then nBL7LocvR  
     point_in = True |")}p=   
     Exit Function i8I%}8  
  End If I#Ay)+D  
     IpY  R  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) KotJ,s]B  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) m;{_%oQ;  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Nm%&xm  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) *52*I
RH  
    sum = aob + boc + cod + doa I!.o&dk  
    If 360.01 > sum And sum > 359.99 Then ,FX;-nP%  
       point_in = True $b\`N2J-_  
    Else `CW8Wj  
       point_in = False PJN TIa  
    End If bp2l%A;  
End Function

'得到点半径,得到交点坐标函数 :kqJ~  
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() npg.*I/>  
    '求得中心点坐标 $6h:j#{JE  
Dim tt As String -_.)~)P  
Dim rt(3) As Single /ZZo`   
    '判断是否平行 kVw5z3]Xg  
   acx = p3x - p1x XodA(73`i  
   acy = p3y - p1y ed4:r/Dpo  
   bdx = p4x - p2x `w6\II)aB  
   bdy = p4y - p2y =v=
a:e  
   If acx * bdy = acy * bdx Then ;oVdkp  
      rt(0) = 0 Ojq>4=Z\  
      Exit Function mv%fX2.  
   Else Qn(e[ C6\  
      '判断斜率存在否 EsXCi2]1  
      If p1x = p3x And p2x <> p4x Then -
EFtk\/  
         tt = "ac_n_bd_y" \%=\_"^?  
      ElseIf p1x <> p3x And p2x = p4x Then MPA<?  
         tt = "ac_y_bd_n" Ek(. ["  
      ElseIf p1x <> p3x And p2x <> p4x Then :}TT1@  
         tt = "ac_y_bd_y" bgGd  
      End If $[5ihV$u  
    Select Case tt KOGbC`TN<  
         Case "ac_n_bd_y" {NXc<0a(  
            'bd线段方程 "DM$FRI0  
            k_bd = bdy / bdx &Qy_= -]  
            b_bd = p2y - k_bd * p2x 5Tluxt71  
            p_x = p1x k'}}eu/ q  
            p_y = k_bd * p_x + b_bd r^-3( 77n  
         Case "ac_y_bd_n" aiGT!2  
            'ac线段方程 ~"!F&  
            k_ac = acy / acx mb~w .~%  
            b_ac = p1y - k_ac * p1x Oyhl*`-*t  
            p_x = p2x Sx+.<]t2A  
            p_y = k_ac * p_x + b_ac :.f =>s]  
        Case "ac_y_bd_y" OaRtGJnR  
           'ac，bd线段都要求 P!'Sx;C^f  
           k_ac = acy / acx 5WgdgDb@L  
           b_ac = p1y - k_ac * p1x ug0[*#|Y  
           k_bd = bdy / bdx LF* 7;a  
           b_bd = p2y - k_bd * p2x R<lj$_72Q  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ]h~=lItTRZ  
           p_y = k_ac * p_x + b_ac >3s9vdUp4h  
        End Select {uh]b(}s)  
      rt(1) = p_x (p26TN;*$5  
      rt(2) = p_y +"6_rbeuO  
     7lY&/-V  
'计算最大半径 A>(m}P  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 7)S`AQ2:)  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) d$8rzd  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) \Xc6K!HJM  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 2;r(?ebw  
Dim bb(5) As Single K/79Tb-  
  bb(1) = rr1 1i4KZ"A5+  
  bb(2) = rr2 sy+1xnz  
  bb(3) = rr3 Q\&FuU  
  bb(4) = rr4 ]S<eO6z  
  nb = rr1 Brr{iBz*"  
For i = 1 To 4 ZXljCiNn+\  
    If nb <= bb(i) Then ^%-$8sV  
       nb = bb(i) U(]
a(k<r  
    End If G$XvxJ  
Next i SLpB$puS  
    rt(0) = Sqr(nb) ~Tq `c  
    rr = rt() 1O*5>dkX;%  
  End If yjvzA|(YC  
         >'wl)j$  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  &QO~p3M  

RFd.L@-]  
有热压工艺方面的人才或者资料分享下； . [DCL  
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 O4@sN=o  

高手真多！

楼主威武霸气.