[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： J~N!. i  
w~n+hhMF  
_OK!/T*FBt  

关键点说几个： ]hbrzvo  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） w(Q{;RNM;  
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 O81'i2MJ9  
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 A|m0.'/  

以下是几个重要的函数： \M*c3\&~,e  
1.判断点在区域中函数 [MeFj!(  
2.计算夹角函数 I0_>ryA  
3.转置函数 =3GgfU5k  
4.得到区域中心点，及区域半径函数 Q6CVMYT  
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） fhro"5/4  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ]'0}fuV  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single -e_pw,5c '  
   cax = x2 - x1 D+Z2y1
  
   cay = y2 - y1 @$;I%  
   cbx = x2 - x3 .Z@iz5  
   cby = y2 - y3 #eKH'fE  
   mo_jj = cax * cbx + cay * cby |[$TT$
Fb  
   mo_ca = Sqr(cax * cax + cay * cay) R^yh,  
   mo_cb = Sqr(cbx * cbx + cby * cby) ZUl-&P_X  
   cos_acb = mo_jj / (mo_ca * mo_cb) a*nCvZ  
   'ff_cos = cos_acb 3O|2Z~>3  
   If cos_acb >= 1 Then $IJ"fs  
   nn = 0 )vGxF}I3  
   ElseIf cos_acb <= -1 Then lXutZ<S[  
   nn = 3.14159265258979 h~ehZJys  
   Else pR!m  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) @/='BVb'T  
   End If *d-JAE  
   'ff_angle = nn L$@qEsO  
   ff_angle = nn * 180 / 3.14159265258979 XM`&/)  
End Function

'判断点在区域内函数 ?2K~']\S  
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 lr)9U7  
Dim aob, boc, cod, doa, sum As Single m:cWnG  
  If ppx = p1x And ppy = p1y Then u0%bv\$m  
     point_in = True ksyQ_4^SO  
     Exit Function $]4o!Z  
  End If <=%G%V_s  
  If ppx = p2x And ppy = p2y Then ?v&2^d4C*F  
     point_in = True #r@>.S=U]  
     Exit Function UryHte  
  End If lN*"?%<
x>  
   If ppx = p3x And ppy = p3y Then .+5;AtN  
     point_in = True {]O.?Yru?  
     Exit Function 3o#K8EL  
  End If ;7(vqm<V2~  
     )IKqO:@  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 8TYoa:pZ  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ozl>Au  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) -9R.mG  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) m(CsO|pz  
    sum = aob + boc + cod + doa Gy
c_B  
    If 360.01 > sum And sum > 359.99 Then 5.l
g*vh  
       point_in = True u|(Iu}sE=  
    Else l=47#zbpZ]  
       point_in = False w=thaF.  
    End If 0RN7hpf&`  
End Function

'得到点半径,得到交点坐标函数 Iv?1XI=  
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() }+F@A`Bm&  
    '求得中心点坐标 vX$|/74  
Dim tt As String . Fm| $x  
Dim rt(3) As Single aUKa+"`S  
    '判断是否平行 'r}y{`3M  
   acx = p3x - p1x +B4i,]lCx  
   acy = p3y - p1y T^Hq 5Oy  
   bdx = p4x - p2x 0kaMYV?  
   bdy = p4y - p2y 3vEwui-5  
   If acx * bdy = acy * bdx Then 4r9AUmJqw  
      rt(0) = 0 E/_n}$Z  
      Exit Function QG09=GQ  
   Else cp
x:4R,  
      '判断斜率存在否 zvT8r(<n}  
      If p1x = p3x And p2x <> p4x Then /L` +  
         tt = "ac_n_bd_y" % xBQX  
      ElseIf p1x <> p3x And p2x = p4x Then 5E2T*EXSh  
         tt = "ac_y_bd_n" xC2y/?  
      ElseIf p1x <> p3x And p2x <> p4x Then ,N8SP 'R  
         tt = "ac_y_bd_y" :*J!  
      End If %%lJyLq'Vk  
    Select Case tt ~_ko$(;A  
         Case "ac_n_bd_y" 4cDe'9 LA  
            'bd线段方程 <M\#7.](  
            k_bd = bdy / bdx MFqb_q+  
            b_bd = p2y - k_bd * p2x >FL%H=]  
            p_x = p1x cY.5z:7u~v  
            p_y = k_bd * p_x + b_bd :v^OdW  
         Case "ac_y_bd_n" I%CrsEo  
            'ac线段方程 P#AS")Sj  
            k_ac = acy / acx 'NDr$Qc3  
            b_ac = p1y - k_ac * p1x nsu RG  
            p_x = p2x
gVs@T'  
            p_y = k_ac * p_x + b_ac Lo}zT-F  
        Case "ac_y_bd_y" C%"aj^u  
           'ac，bd线段都要求 !~Kg_*IT  
           k_ac = acy / acx B%z+\<3^q  
           b_ac = p1y - k_ac * p1x `Yyi;!+0  
           k_bd = bdy / bdx 8#RL2)7Uy`  
           b_bd = p2y - k_bd * p2x RIFTF R  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ,jeC7-tX  
           p_y = k_ac * p_x + b_ac 7~
VDk5Z6  
        End Select n"nfEA3{`  
      rt(1) = p_x ]vH:@%3U  
      rt(2) = p_y _B
G7JvI  
     H_w?+Rig  
'计算最大半径 SxL/]jWR7  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) /$|-!e<5b\  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) A1B%<$|pz  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Nu+DVIM  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) eCG{KCM~_Z  
Dim bb(5) As Single BVS SO's  
  bb(1) = rr1 c;88Wb<|W  
  bb(2) = rr2 ]aYuBoj  
  bb(3) = rr3 )oZ2,]us!  
  bb(4) = rr4 }bnodb^.7  
  nb = rr1 _U Y5  
For i = 1 To 4 4j<[3~:0 o  
    If nb <= bb(i) Then 1tlqw  
       nb = bb(i) ?3<Y/Vg%c  
    End If j k&\{  
Next i J@qLBe(v  
    rt(0) = Sqr(nb) c,}VC-  
    rr = rt() D{JwZL@7k2  
  End If {5c]\{O?[  
          Au*1-  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  wkT4R\H>  

kqGydGh*"  
有热压工艺方面的人才或者资料分享下； jn oX%3d-  
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 ^tVIPH.R  

高手真多！

楼主威武霸气.