[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： }el.qZ  
iH#~eg  
HDIB GG~  

关键点说几个： W'E!5T^  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） xgrk>Fb|R  
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 /u<lh. hPW  
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 <^UB@'lCm  

以下是几个重要的函数： +Q_X,gZ  
1.判断点在区域中函数 AU}lKq7%  
2.计算夹角函数 sRE$*^i
 
3.转置函数
e!l!T@ pf  
4.得到区域中心点，及区域半径函数 2xZg, \  
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） !3DWz6u  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 m`g%\o^6i  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single -3qB,KT  
   cax = x2 - x1 nR6~oB{-  
   cay = y2 - y1 0(Vbji  
   cbx = x2 - x3 i`gsT[JQRX  
   cby = y2 - y3 h76#HUBr!  
   mo_jj = cax * cbx + cay * cby wHBkaPO!  
   mo_ca = Sqr(cax * cax + cay * cay) E(4ti]'4  
   mo_cb = Sqr(cbx * cbx + cby * cby) W:3u$LTf*f  
   cos_acb = mo_jj / (mo_ca * mo_cb) +N5G4t#.  
   'ff_cos = cos_acb [])M2_  
   If cos_acb >= 1 Then Q#}} 1}Ja  
   nn = 0 Vvm6T@b M8  
   ElseIf cos_acb <= -1 Then 6ApW+/  
   nn = 3.14159265258979 N(dn"`
8  
   Else Qf414 oW  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) %{yr#F=t#]  
   End If
N$/{f2iC  
   'ff_angle = nn TIW6v4  
   ff_angle = nn * 180 / 3.14159265258979 KA`1IW
;  
End Function

'判断点在区域内函数 3HO4h\mp  
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 7V4iPx  
Dim aob, boc, cod, doa, sum As Single RT9fp(6*  
  If ppx = p1x And ppy = p1y Then X-3L4@T:?  
     point_in = True T)3#U8sT  
     Exit Function ,ZD!Qb  
  End If vn .wM  
  If ppx = p2x And ppy = p2y Then 0+/L?J3  
     point_in = True #Jy+:|jJ  
     Exit Function D?}LKs[  
  End If <!y_L5S|  
   If ppx = p3x And ppy = p3y Then /Or76kE  
     point_in = True (+Gd)iO  
     Exit Function `vDg~o  
  End If zO2<Igb  
     UldKlQ8  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) IqfR`iAix  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) *7ap[YXZ\w  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) agBK
p!  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) A!Ng@r  
    sum = aob + boc + cod + doa xE9^4-Px*  
    If 360.01 > sum And sum > 359.99 Then *B#OLx  
       point_in = True ~SV;"e2N.  
    Else S^I38gJd  
       point_in = False OA%.>^yb@  
    End If 'V4.umj1~  
End Function

'得到点半径,得到交点坐标函数 dXe763~<  
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() '!yyg#  
    '求得中心点坐标 I #1_  
Dim tt As String TCmWn$LeE  
Dim rt(3) As Single dam.D.o"  
    '判断是否平行 Gg5vf]VFo  
   acx = p3x - p1x b'3#FI=:  
   acy = p3y - p1y at7/KuY!~  
   bdx = p4x - p2x LFen!FnM  
   bdy = p4y - p2y /RX7AXXB  
   If acx * bdy = acy * bdx Then @{+*ea7M(`  
      rt(0) = 0 \Q^\z   
      Exit Function dH?pQ 
 
   Else Rv.W~FE^  
      '判断斜率存在否 qpp:h_E  
      If p1x = p3x And p2x <> p4x Then '?
yZ,t  
         tt = "ac_n_bd_y" %{zM> le9  
      ElseIf p1x <> p3x And p2x = p4x Then _'2r=a#`  
         tt = "ac_y_bd_n" tE>3.0U0Q  
      ElseIf p1x <> p3x And p2x <> p4x Then JC>}(yQA  
         tt = "ac_y_bd_y" ,LcMNPr  
      End If S:Yo9~  
    Select Case tt pC5-,Z;8  
         Case "ac_n_bd_y" -[^wYr=  
            'bd线段方程 f}Uw%S=w,  
            k_bd = bdy / bdx t9 &O0tpe  
            b_bd = p2y - k_bd * p2x ?ZTB u[  
            p_x = p1x ^$
?8!WE  
            p_y = k_bd * p_x + b_bd <@JU0Z"a=  
         Case "ac_y_bd_n" S1$\D!|1  
            'ac线段方程 FAPgXmFzx  
            k_ac = acy / acx `kekc.*-[@  
            b_ac = p1y - k_ac * p1x qn+mlduU  
            p_x = p2x 61jDI^:  
            p_y = k_ac * p_x + b_ac
E62*J$wN@  
        Case "ac_y_bd_y" m#8}!u&  
           'ac，bd线段都要求 2cy{d|c  
           k_ac = acy / acx =1\'xz}p?  
           b_ac = p1y - k_ac * p1x }d6g{`  
           k_bd = bdy / bdx /JveN8L%  
           b_bd = p2y - k_bd * p2x ^e&
,<+qY  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 8d Ftp3(  
           p_y = k_ac * p_x + b_ac NA0hQGN}  
        End Select ceZt%3=5  
      rt(1) = p_x rWbL_1Eq  
      rt(2) = p_y 5O*+5n  
     JmY"Ja,&  
'计算最大半径  ISq^V  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) RKjA`cJ  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 55,vmDd  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 72v 9S T  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Y~Jq!  
Dim bb(5) As Single Q{$2D&  
  bb(1) = rr1 `P# h?tZ  
  bb(2) = rr2 c=@=lGgo  
  bb(3) = rr3 8Oc*<^{#  
  bb(4) = rr4 F." L{g  
  nb = rr1 :+-s7'!4  
For i = 1 To 4 c)E'',-J_2  
    If nb <= bb(i) Then 0K#dWc}"a  
       nb = bb(i) `8'|g8,wb0  
    End If wHIS}OONz  
Next i B<0lif|  
    rt(0) = Sqr(nb) }F1^gN&QF  
    rr = rt() Z ,T TI>P  
  End If %/sf#8^m  
         nY~CAo/:  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  +:oHI[1HG  

jaNkWTm:  
有热压工艺方面的人才或者资料分享下； LN_6>u  
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 D'
A)H  

高手真多！

楼主威武霸气.