[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： S.q].a  
KiOcu=F  
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关键点说几个： %v7[[U{T  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） *b}lF4O?  
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 (B-43!C  
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 15o?{=b[  

以下是几个重要的函数： UNi`P9D]3  
1.判断点在区域中函数 JA_BKA  
2.计算夹角函数 h=_0+\%  
3.转置函数 VA%Un,5h  
4.得到区域中心点，及区域半径函数 ]
$\|ktY!  
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） =)` p_W  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 9bq<GC'eX8  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single LW:LFzp  
   cax = x2 - x1 `\6?WXk3T  
   cay = y2 - y1 I]y.8~xs  
   cbx = x2 - x3 'vaLUy9]  
   cby = y2 - y3 d'Axum@  
   mo_jj = cax * cbx + cay * cby @M8|(N%  
   mo_ca = Sqr(cax * cax + cay * cay) T}=>C+3r  
   mo_cb = Sqr(cbx * cbx + cby * cby) {?}*1,I  
   cos_acb = mo_jj / (mo_ca * mo_cb) fQ=MJ7l  
   'ff_cos = cos_acb @IP)S[^' t  
   If cos_acb >= 1 Then "h7tnMS  
   nn = 0 *cg( ?yg  
   ElseIf cos_acb <= -1 Then *I0-O*Xr  
   nn = 3.14159265258979 `3'0I/d"z  
   Else X*7\lf2  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Ep4Hqx $  
   End If C}*cx$.  
   'ff_angle = nn b]JI@=s?  
   ff_angle = nn * 180 / 3.14159265258979 W Qc>  
End Function

'判断点在区域内函数 lRP1&FH0  
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 [!VOw@uz  
Dim aob, boc, cod, doa, sum As Single x4#T G  
  If ppx = p1x And ppy = p1y Then Jj^GWZRu  
     point_in = True 9=/N|m8.  
     Exit Function 9OfFM9(:  
  End If X+n`qiwq  
  If ppx = p2x And ppy = p2y Then N6[i{;K@N{  
     point_in = True Z2bcCIq4  
     Exit Function -)y%~Zn  
  End If D=)f )-u'  
   If ppx = p3x And ppy = p3y Then '?yCq$&  
     point_in = True H2-28XG
c  
     Exit Function 5ZAb]F90  
  End If ARfRsPxr  
     ehAu^^Q>  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) H_IGFZCh  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) \BI/G  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) =BZ?-mIU  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) mEuHl>  
    sum = aob + boc + cod + doa ,`8Y8  
    If 360.01 > sum And sum > 359.99 Then })IO#,  
       point_in = True 7> Pgc
 
    Else ; W7Y2Md  
       point_in = False Y+/lX6'  
    End If )J3kxmlzQ  
End Function

'得到点半径,得到交点坐标函数
}IlP:  
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() ^i:\@VA:  
    '求得中心点坐标 r[Zq3  
Dim tt As String H"+c)FGi  
Dim rt(3) As Single fV ZW[9[  
    '判断是否平行 QlW=_Ymv{  
   acx = p3x - p1x f8:$G.}i  
   acy = p3y - p1y I/UQ'xx  
   bdx = p4x - p2x `!w^0kZ  
   bdy = p4y - p2y Eo{EKI1  
   If acx * bdy = acy * bdx Then 4^!4eyQ^  
      rt(0) = 0 K
v+Bfh  
      Exit Function !g0cC.'  
   Else IvW@o1Q  
      '判断斜率存在否 dA#{Cn;  
      If p1x = p3x And p2x <> p4x Then <Ns &b.\h6  
         tt = "ac_n_bd_y" Eqphd!\#6  
      ElseIf p1x <> p3x And p2x = p4x Then )XVh&'(r  
         tt = "ac_y_bd_n" MMD<I6Iyv  
      ElseIf p1x <> p3x And p2x <> p4x Then IF?xnu  
         tt = "ac_y_bd_y" h}=M^SL  
      End If SQKt}kDbM  
    Select Case tt ,sb1"^Wc  
         Case "ac_n_bd_y" 
S]yvMj_?  
            'bd线段方程 DA LQ<iF  
            k_bd = bdy / bdx DcFCKji  
            b_bd = p2y - k_bd * p2x u;n(+8sz  
            p_x = p1x mTEVFm  
            p_y = k_bd * p_x + b_bd 'H=weH  
         Case "ac_y_bd_n" /= ^L iP  
            'ac线段方程 $ly0h W  
            k_ac = acy / acx cztS]dcf>~  
            b_ac = p1y - k_ac * p1x u3wL<$2[8  
            p_x = p2x ]A!.9Ko}u  
            p_y = k_ac * p_x + b_ac ~Ob8i1S>  
        Case "ac_y_bd_y" z Z%/W)t  
           'ac，bd线段都要求 G6Q4-kcK  
           k_ac = acy / acx aW@oE ~`  
           b_ac = p1y - k_ac * p1x AA7#c7  
           k_bd = bdy / bdx 5V|tXsy:  
           b_bd = p2y - k_bd * p2x _ +KmNfR  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 8!j=vCv  
           p_y = k_ac * p_x + b_ac &N{zkMf  
        End Select D_aR\  
      rt(1) = p_x #,P(isEZ"  
      rt(2) = p_y ~.Q4c*_b  
     ~N[|bPRmhE  
'计算最大半径 mG}k 3e-  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) z^~U]S3  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) %UmbDGDWI  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Mh
H);fn  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) XZ@>]P  
Dim bb(5) As Single _5h0@^m7y  
  bb(1) = rr1 l%bq2,-%  
  bb(2) = rr2 K.h]JD]o  
  bb(3) = rr3 /.-m}0h|W-  
  bb(4) = rr4 ' PL_~  
  nb = rr1 /'+4vXc@  
For i = 1 To 4 M+UMR+K  
    If nb <= bb(i) Then w)<4>(D  
       nb = bb(i) 0|Q.U  
    End If L{K*~B-p  
Next i Y\>\[*.v  
    rt(0) = Sqr(nb) 5V rcR=?O  
    rr = rt() di<B~:l58  
  End If Fc{((x s  
         D'?]yyrf  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  GsR-#tV@  

@ 8A{ 9i  
有热压工艺方面的人才或者资料分享下； %+/f'6
kR  
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 u2f `|+1^y  

高手真多！

楼主威武霸气.