[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： "X}F%:HL  
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~vZzKRVS  

关键点说几个： p<['FRf"  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 8=AKOOU7>  
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 :2d9ZDyD  
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 ? NK}q\$  

以下是几个重要的函数： L,GtIZkE  
1.判断点在区域中函数 $X]v;B)J|  
2.计算夹角函数 \{mJO>x  
3.转置函数 EmoU7iy  
4.得到区域中心点，及区域半径函数 d0,F'?.0|  
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） dPX>A4wp  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ( mMz]b5  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single |th )Q  
   cax = x2 - x1 U\6DEnII?!  
   cay = y2 - y1 |sAg@kM  
   cbx = x2 - x3 UGgi)  
   cby = y2 - y3 31Du@h8YX  
   mo_jj = cax * cbx + cay * cby DR=1';63  
   mo_ca = Sqr(cax * cax + cay * cay) C"WZsF^3  
   mo_cb = Sqr(cbx * cbx + cby * cby) ^Y |s^N  
   cos_acb = mo_jj / (mo_ca * mo_cb) 5E=Odep`  
   'ff_cos = cos_acb gC-0je  
   If cos_acb >= 1 Then u9(AT>HxT  
   nn = 0 WRM}gWv*  
   ElseIf cos_acb <= -1 Then N*W.V,6yH  
   nn = 3.14159265258979 Dh<e9s:  
   Else qo|iw+0Y  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) .ji%%f  
   End If ( PlNaasV  
   'ff_angle = nn `-m7CT sA  
   ff_angle = nn * 180 / 3.14159265258979 &rKhB-18)  
End Function

'判断点在区域内函数 g=8e.Y*Fr  
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%Me  
Dim aob, boc, cod, doa, sum As Single g>f394j  
  If ppx = p1x And ppy = p1y Then KW\`&ki  
     point_in = True zT"#9"["  
     Exit Function x`&W[AA4  
  End If 5B6:pH6e  
  If ppx = p2x And ppy = p2y Then `N+ P,  
     point_in = True Vv]mME@  
     Exit Function |n;7fqK  
  End If A:(uK>5{Kk  
   If ppx = p3x And ppy = p3y Then d
|3[MnU[a  
     point_in = True #q%/~-Uk  
     Exit Function &/p9+gd  
  End If [PT}!X7h  
     E:AXnnGKO  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) X@rAe37h+  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) KV
2X[1  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) XT)@)c7j  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) %o>1$f]  
    sum = aob + boc + cod + doa e!#:h4I  
    If 360.01 > sum And sum > 359.99 Then wB@A?&UY  
       point_in = True u}$3.]-.?T  
    Else $1YnQgpT  
       point_in = False S3
w? X  
    End If +}]xuYzo
 
End Function

'得到点半径,得到交点坐标函数 6Y=)12T  
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() [LE_lATjU  
    '求得中心点坐标 K7|BXGL8r8  
Dim tt As String U<$|ET'  
Dim rt(3) As Single @C#lA2(I4  
    '判断是否平行 Dcq^C LPY  
   acx = p3x - p1x 9496ayi  
   acy = p3y - p1y /1YqDK0  
   bdx = p4x - p2x hq|/XBd||  
   bdy = p4y - p2y p4=^ UP  
   If acx * bdy = acy * bdx Then #H|]F86(  
      rt(0) = 0 K=V)"v5o3  
      Exit Function /}Max@.`  
   Else PM{kiz^  
      '判断斜率存在否 czafBO6  
      If p1x = p3x And p2x <> p4x Then 3LG)s:p$/  
         tt = "ac_n_bd_y" qbjRw!2?w  
      ElseIf p1x <> p3x And p2x = p4x Then 9kcAMk1K  
         tt = "ac_y_bd_n" &W1c#]q@r  
      ElseIf p1x <> p3x And p2x <> p4x Then !^w+<p  
         tt = "ac_y_bd_y" "Mth<%i  
      End If 3/iGSG`  
    Select Case tt q*>`HTPcU  
         Case "ac_n_bd_y" WK-WA$7\  
            'bd线段方程 (sY?"(~j?T  
            k_bd = bdy / bdx ~%cbp&s*/q  
            b_bd = p2y - k_bd * p2x krgsmDi7  
            p_x = p1x UhNeY{6  
            p_y = k_bd * p_x + b_bd a4?:suX$  
         Case "ac_y_bd_n" ?g1%-F+  
            'ac线段方程 mAz'
:R[  
            k_ac = acy / acx @#n
B]qV:e  
            b_ac = p1y - k_ac * p1x p\Jz<dkN1  
            p_x = p2x YDP<  
            p_y = k_ac * p_x + b_ac #8cY,%<S]  
        Case "ac_y_bd_y" LbnR=B!  
           'ac，bd线段都要求 IL\#!|>  
           k_ac = acy / acx p tMysYT'  
           b_ac = p1y - k_ac * p1x .-{B  
           k_bd = bdy / bdx :W
E(1!P@  
           b_bd = p2y - k_bd * p2x !RV}dhI  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 1Nv_;p.{  
           p_y = k_ac * p_x + b_ac : -OHD#>%  
        End Select 0EOpK%{  
      rt(1) = p_x {/N4/gu  
      rt(2) = p_y bX8Bn0#a+  
     ~)ls.NXI  
'计算最大半径 fDf:J
ec`[  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 0GEK xV\F  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y)
/_v@YB!
0  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) @wbV@  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) (h%!Kun  
Dim bb(5) As Single 72.ZE%Ue  
  bb(1) = rr1 42mdak}\  
  bb(2) = rr2 `8EHhN;  
  bb(3) = rr3 Ga"t4[=I  
  bb(4) = rr4 7Q2"]f,$CQ  
  nb = rr1 !ce5pA  
For i = 1 To 4 !h4L_D0  
    If nb <= bb(i) Then <^{|5u  
       nb = bb(i) {x s{  
    End If >O?5mfMK  
Next i ,*Jm\u  
    rt(0) = Sqr(nb) r!'\$(m E  
    rr = rt() x pT85D  
  End If 1jpcoJ@s  
         F.zn:yX5  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  *PEk+e  

4K{<R!2I  
有热压工艺方面的人才或者资料分享下； a8$gXX-2  
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 Y;n;7M<F  

高手真多！

楼主威武霸气.