[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： &Th/Qv}[  
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关键点说几个： 0sVCTJ@  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 1Y@6oT  
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 Eag->mw/~  
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 '1ff|c!x9  

以下是几个重要的函数： sq*R)cZ  
1.判断点在区域中函数 wke
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2.计算夹角函数 RmO-".$yt  
3.转置函数 |^Try2@  
4.得到区域中心点，及区域半径函数 9NaC7D$,  
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） !OPK?7  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 $b\Gl=YX^  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single "6 dC  
   cax = x2 - x1 +;`Cm.Iu  
   cay = y2 - y1 ub}t3#  
   cbx = x2 - x3 V5K`TC^
 
   cby = y2 - y3 ?.|qRzWL  
   mo_jj = cax * cbx + cay * cby p4<&NMG  
   mo_ca = Sqr(cax * cax + cay * cay) g[-'0d\1  
   mo_cb = Sqr(cbx * cbx + cby * cby) r&0v,WSp&S  
   cos_acb = mo_jj / (mo_ca * mo_cb) $Xk1'AzB8  
   'ff_cos = cos_acb R2x(8k"LPU  
   If cos_acb >= 1 Then S`K8e^]
 
   nn = 0 ~8`r.1aUO  
   ElseIf cos_acb <= -1 Then RNcHU  
   nn = 3.14159265258979 >8
t3a-/  
   Else hX$k8 o0  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Sq-mH=rs]  
   End If "J,ErnM  
   'ff_angle = nn wjoxfPnf  
   ff_angle = nn * 180 / 3.14159265258979 q3T'rw%Eh  
End Function

'判断点在区域内函数 (3%NudkwT  
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 op"RrZAZBT  
Dim aob, boc, cod, doa, sum As Single HMS9_#[kE  
  If ppx = p1x And ppy = p1y Then Hl?\P6  
     point_in = True hR[Qdu6r  
     Exit Function kJlRdt2  
  End If ]. IUQ*4t  
  If ppx = p2x And ppy = p2y Then zRD{"uqi  
     point_in = True ts{Tk5+  
     Exit Function ^WVH z;  
  End If enO5XsIc  
   If ppx = p3x And ppy = p3y Then
\H*"UgS  
     point_in = True v /G,  
     Exit Function <S6|$7{1  
  End If 06]J]  
     Yr,e7da  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) DKF`uRvGN:  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) qI) Yzc/  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) UKZsq5Q  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) yw{GO([ZQ  
    sum = aob + boc + cod + doa _Sosw|A  
    If 360.01 > sum And sum > 359.99 Then e#0R9+"Ba  
       point_in = True 4@4$kro  
    Else Qg%B<3 <  
       point_in = False bEMD2ABm  
    End If =Mc*~[D/  
End Function

'得到点半径,得到交点坐标函数 y['$^T?
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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() 'hf#Q9W5  
    '求得中心点坐标 gH,^XZe  
Dim tt As String f2`[skNj  
Dim rt(3) As Single ?.LS_e_0  
    '判断是否平行 JpcG5gX^B  
   acx = p3x - p1x Ty}'A(U  
   acy = p3y - p1y [GyW1-p33w  
   bdx = p4x - p2x f0~<qT?:n  
   bdy = p4y - p2y Ovq-rI{  
   If acx * bdy = acy * bdx Then Z]@my,+Z;  
      rt(0) = 0 "@xI  
      Exit Function ||;V5iR
:  
   Else $>hPB[[  
      '判断斜率存在否 u<!8dQ8  
      If p1x = p3x And p2x <> p4x Then wI'T Je,  
         tt = "ac_n_bd_y" C?fd.2#U  
      ElseIf p1x <> p3x And p2x = p4x Then |e!%6Qq3  
         tt = "ac_y_bd_n" NoB)tAvw  
      ElseIf p1x <> p3x And p2x <> p4x Then 3,8<5)ds*  
         tt = "ac_y_bd_y" ]o$aGrZ  
      End If bX Q*d_]WT  
    Select Case tt <~X4&E]rT_  
         Case "ac_n_bd_y" <'>c`80@\*  
            'bd线段方程 eGkB#.+J!  
            k_bd = bdy / bdx H9?(5  
            b_bd = p2y - k_bd * p2x i+ ]3J/J  
            p_x = p1x 7?9QlUO  
            p_y = k_bd * p_x + b_bd -|bnvPmE  
         Case "ac_y_bd_n" 4@AY~"dq  
            'ac线段方程 mSm:>hBd  
            k_ac = acy / acx A(V,qw8  
            b_ac = p1y - k_ac * p1x +DmfqKKbd  
            p_x = p2x }F!tM"X\  
            p_y = k_ac * p_x + b_ac ~2PD%+e7]  
        Case "ac_y_bd_y" 3q:U0&F  
           'ac，bd线段都要求 `$*I%oT;  
           k_ac = acy / acx ^hr^f;N  
           b_ac = p1y - k_ac * p1x  Sg  
           k_bd = bdy / bdx t1}R#NB  
           b_bd = p2y - k_bd * p2x :[xFp}w{  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) io%WV%1_  
           p_y = k_ac * p_x + b_ac R&KFF'%  
        End Select O?L6Ues  
      rt(1) = p_x aO)Cq5  
      rt(2) = p_y :%7y6V
*  
     v7gs $'Q  
'计算最大半径 iY?J3nxD-:  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) UR?biq  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) vX1 8 ]  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) +-~8t^  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y)  PgIH(  
Dim bb(5) As Single yw
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  bb(1) = rr1 cZC%W!pT  
  bb(2) = rr2 ]Y111<Ja  
  bb(3) = rr3 O/Cwm;&t  
  bb(4) = rr4 =\~<##sRJ  
  nb = rr1 o-i9 :AHs  
For i = 1 To 4 q>|&u  
    If nb <= bb(i) Then !-rG1VI_S*  
       nb = bb(i) @=rYOQj|  
    End If RwKnNIp  
Next i V3D`pt\[x  
    rt(0) = Sqr(nb) H j [!F%  
    rr = rt() i&mcM_g32  
  End If 9UDanj P  
         )hG4,0hv&  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  |k$6"dXSO  

xkCM*5:  
有热压工艺方面的人才或者资料分享下； 8WE@ X)e  
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 7KesfH?  

高手真多！

楼主威武霸气.