[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： cO$ PK  
4H4U  
 T~I5W=y  

关键点说几个： wRwTN"Yg  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） *Vk%"rwaG  
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 WBS~e  
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 i#I+    

以下是几个重要的函数： iV
X12  
1.判断点在区域中函数 KjR^6v  
2.计算夹角函数 vJ*IUy  
3.转置函数 u|m>h(O  
4.得到区域中心点，及区域半径函数 5m,{?M`  
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） y74Ph:^k  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 tqLn
A  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single =|IB=  
   cax = x2 - x1 k$</7IuH  
   cay = y2 - y1 'LZF^m _<<  
   cbx = x2 - x3 @-dM'R6C  
   cby = y2 - y3 tjZ.p.IlG  
   mo_jj = cax * cbx + cay * cby (uG.s%I  
   mo_ca = Sqr(cax * cax + cay * cay) %1ofu,%  
   mo_cb = Sqr(cbx * cbx + cby * cby) =w HU*mK  
   cos_acb = mo_jj / (mo_ca * mo_cb) [KXxn>n  
   'ff_cos = cos_acb ,<$6-3sC-  
   If cos_acb >= 1 Then JlAUie8  
   nn = 0 %FnaS u  
   ElseIf cos_acb <= -1 Then j.MpQ^eJ7  
   nn = 3.14159265258979 -L>\58`  
   Else `{fqnNJE  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) $M\|zUQu.  
   End If Z&W|O>QTl  
   'ff_angle = nn =G9%Hz5~:  
   ff_angle = nn * 180 / 3.14159265258979 bX#IE[Yp}  
End Function

'判断点在区域内函数 'Im7^!-d  
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 |K?fVL  
Dim aob, boc, cod, doa, sum As Single [\CQ_qs|  
  If ppx = p1x And ppy = p1y Then Pxu!,Mi[d  
     point_in = True 
K1>.%m  
     Exit Function iorKS+w"  
  End If b_Ns Ch3@  
  If ppx = p2x And ppy = p2y Then &T?>Kx  
     point_in = True ]T\K-;i  
     Exit Function \a+F/I$hwa  
  End If LLv~yS O  
   If ppx = p3x And ppy = p3y Then <mlQn?u  
     point_in = True PT4Xr=z =  
     Exit Function !!&H'XEJV  
  End If xkR--/f  
     LXj2gsURu%  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) s~Wjh7'  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) !cnunLc`  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) _3<J!$]&p  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) "UVqkw,vt  
    sum = aob + boc + cod + doa  r(pp =  
    If 360.01 > sum And sum > 359.99 Then 0-"ps]X  
       point_in = True B`OggdE  
    Else xB:,l'\G  
       point_in = False 3F2> &p|7  
    End If ~/1kCZB  
End Function

'得到点半径,得到交点坐标函数 s]`&9{=E  
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() <uNBsYMuC  
    '求得中心点坐标 d.tjLe
Y  
Dim tt As String gWA)V*}f  
Dim rt(3) As Single 'qQ 5K o  
    '判断是否平行 P,!si#  
   acx = p3x - p1x !zLd,`  
   acy = p3y - p1y UK+;/Mtg  
   bdx = p4x - p2x yCkfAx8]  
   bdy = p4y - p2y ,GXwi|Y  
   If acx * bdy = acy * bdx Then :FwXoJc_+5  
      rt(0) = 0 ntkTrei ]  
      Exit Function Yo;/7gG>  
   Else Cl[ '6Lk  
      '判断斜率存在否 kHd_q.  
      If p1x = p3x And p2x <> p4x Then #T Cz$_=t  
         tt = "ac_n_bd_y" dgpo4'c
}  
      ElseIf p1x <> p3x And p2x = p4x Then 3B/ GcltfM  
         tt = "ac_y_bd_n" NuI
9"I/  
      ElseIf p1x <> p3x And p2x <> p4x Then mbv\Gn#>  
         tt = "ac_y_bd_y" Rct|"k_"Ys  
      End If /pgfa-<  
    Select Case tt
xc Wr hg  
         Case "ac_n_bd_y" ,e( |,u  
            'bd线段方程 B1c`(mHl  
            k_bd = bdy / bdx q,VJpqQ  
            b_bd = p2y - k_bd * p2x jV8mn{<  
            p_x = p1x CeS8I-,  
            p_y = k_bd * p_x + b_bd )u]J`.OA  
         Case "ac_y_bd_n" k(<5tvd  
            'ac线段方程 &#v^y3r  
            k_ac = acy / acx UBqA[9  
            b_ac = p1y - k_ac * p1x ZT4._|2
 
            p_x = p2x >8Zz<S&z  
            p_y = k_ac * p_x + b_ac Fwyv>U  
        Case "ac_y_bd_y" G& cm5  
           'ac，bd线段都要求 J}EQ_FC"$  
           k_ac = acy / acx Gnp,~F"  
           b_ac = p1y - k_ac * p1x LgRx\*[C*  
           k_bd = bdy / bdx /XS6X  
           b_bd = p2y - k_bd * p2x Tk$rwTCl  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) k#R}^Q  
           p_y = k_ac * p_x + b_ac :G
qyj_|<  
        End Select lG>rf*ei~  
      rt(1) = p_x Z!G_" 3  
      rt(2) = p_y *$/7;CLq  
     |;'V":yDs  
'计算最大半径 ~6.AE/ow  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 8Fx~i#FT  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) +e<P7}ZQ  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Jx1oK  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Ttn=VX{ \  
Dim bb(5) As Single *ntq;]  
  bb(1) = rr1 1c~c_Cc4  
  bb(2) = rr2 /@R|*7K;9  
  bb(3) = rr3 qd~)Ya1  
  bb(4) = rr4 [Av87!kJ!X  
  nb = rr1 'e02rqip{  
For i = 1 To 4 ,& =(DJ  
    If nb <= bb(i) Then 'P32G?1C&p  
       nb = bb(i) U4%d#  
    End If :-.R*W  
Next i OgyETSN8C  
    rt(0) = Sqr(nb) #<0%_Ca  
    rr = rt() . l RW  
  End If f"xi7vJv!f  
         ':!w%& \  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  >{~W"  

3Ku!;uo!u  
有热压工艺方面的人才或者资料分享下； L=iaL[zdJ  
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 v/c8P\  

高手真多！

楼主威武霸气.