[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： *OR(8;  
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图片:2.jpg

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关键点说几个： M$AQZ')9  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） :rX/ILAr  
2.需要定义光轴的方向；简便的方法就是指定光源坐标，及网点区域坐标，这样光轴就确定了 -nKBSls  
3.网点区域密度可调；把区域分成若干小块，每块的密度不同即可 sAKQ.8$h*  

以下是几个重要的函数： ,wlSNb@'  
1.判断点在区域中函数 gHzjI[WI  
2.计算夹角函数 $/uNV1]o  
3.转置函数 `L
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4.得到区域中心点，及区域半径函数 gDJ@s   
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） v__;oqN0  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 tKUy&]T  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single oFeflcSz  
   cax = x2 - x1 N#`aVW'{v2  
   cay = y2 - y1 'D4KaM.d  
   cbx = x2 - x3 m'%Z53&  
   cby = y2 - y3 7#R& OQ  
   mo_jj = cax * cbx + cay * cby {l7@<xZ??M  
   mo_ca = Sqr(cax * cax + cay * cay) 8c'0"G@S  
   mo_cb = Sqr(cbx * cbx + cby * cby) &sx|sLw)  
   cos_acb = mo_jj / (mo_ca * mo_cb) {M?!nS6t  
   'ff_cos = cos_acb Ueyt}44.e2  
   If cos_acb >= 1 Then u?
f3&pA  
   nn = 0 OQh36BM  
   ElseIf cos_acb <= -1 Then )LYj,do  
   nn = 3.14159265258979 nA]dQ+5sT  
   Else VrokEK*qbY  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) B|O/h!H.  
   End If XjwTjgL<  
   'ff_angle = nn *X;g Y  
   ff_angle = nn * 180 / 3.14159265258979 >P=
xzg79  
End Function

'判断点在区域内函数 *qG=p`  
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 1{"fmV  
Dim aob, boc, cod, doa, sum As Single ^D B
0C  
  If ppx = p1x And ppy = p1y Then i*Y/q-N|  
     point_in = True vfegIoZ  
     Exit Function ;8g#"p*&  
  End If va;d[D,  
  If ppx = p2x And ppy = p2y Then ,h]N*Z-I"  
     point_in = True _jZDSz|Yb  
     Exit Function X5U!25d]  
  End If cx2s|@u0  
   If ppx = p3x And ppy = p3y Then SQ5*?u\  
     point_in = True (7ew&u\Li  
     Exit Function `bT{E.(T  
  End If %e%nsj6  
     =-`+4zB\  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Y=3Y~  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ]hvB-R16f  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) MO#%w  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) Ir\3c9  
    sum = aob + boc + cod + doa K)Db3JIIk  
    If 360.01 > sum And sum > 359.99 Then 5Cy)#Z{  
       point_in = True x\Sp~]o3C  
    Else 2z[Pw0#V
 
       point_in = False wOi>i`D&  
    End If %k$C
   
End Function

'得到点半径,得到交点坐标函数 bY>o%L
L-  
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() 7GP?;P  
    '求得中心点坐标 Ew:JpMR  
Dim tt As String p[uwG31IL`  
Dim rt(3) As Single ^5T{x>Lj  
    '判断是否平行 ZY/at/v  
   acx = p3x - p1x g(5s{njL  
   acy = p3y - p1y `a6;*
ry  
   bdx = p4x - p2x /BIPLDN6  
   bdy = p4y - p2y C3_*o>8  
   If acx * bdy = acy * bdx Then 9M7P]$^  
      rt(0) = 0 '[-/Xa['  
      Exit Function K0E;4r  
   Else !X
.N$0  
      '判断斜率存在否 #SqOJX~Q  
      If p1x = p3x And p2x <> p4x Then Qp=uiXs  
         tt = "ac_n_bd_y" 7CIje=u.q  
      ElseIf p1x <> p3x And p2x = p4x Then J`mp8?;%  
         tt = "ac_y_bd_n" 8D n]`}ok  
      ElseIf p1x <> p3x And p2x <> p4x Then 8@qahEgQ  
         tt = "ac_y_bd_y" WWO jyj  
      End If q/3}8BJ  
    Select Case tt ^Ue.9#9T&g  
         Case "ac_n_bd_y" FCe503qND$  
            'bd线段方程 JV/,QWar  
            k_bd = bdy / bdx ZE
\t{s0  
            b_bd = p2y - k_bd * p2x -Qgfo|po  
            p_x = p1x ,f1wN{P  
            p_y = k_bd * p_x + b_bd \D[BRE+  
         Case "ac_y_bd_n" E+2y-B)E  
            'ac线段方程 GS,pl9#V_  
            k_ac = acy / acx YW}/CwB  
            b_ac = p1y - k_ac * p1x C}>&#)IH  
            p_x = p2x g/@CESfm'  
            p_y = k_ac * p_x + b_ac drZw#b  
        Case "ac_y_bd_y" dG rA18  
           'ac，bd线段都要求 UiSc*_N"  
           k_ac = acy / acx H{XW?O^@  
           b_ac = p1y - k_ac * p1x m,KY_1%M  
           k_bd = bdy / bdx UEeqk"t^  
           b_bd = p2y - k_bd * p2x Yx%%+c?.  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) @3@%9E  
           p_y = k_ac * p_x + b_ac ~9c9@!RA2  
        End Select Ov|j{}=L=9  
      rt(1) = p_x )6j:Mbz  
      rt(2) = p_y O>Sbb2q?"  
     `WB|h)Y  
'计算最大半径 Mm;)O'XDE  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) pE<' '`  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) "+WR[-n>\  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) S'O0'5U@  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 9N29dp>g{{  
Dim bb(5) As Single L8G4K)  
  bb(1) = rr1 <D^x6{}  
  bb(2) = rr2 ; M(}fV]  
  bb(3) = rr3 c5;ROnTm  
  bb(4) = rr4 3u^TJt)  
  nb = rr1 ayD
\b6Z2.  
For i = 1 To 4 %FU[j^  
    If nb <= bb(i) Then -^5R51  
       nb = bb(i) hmH
$_YP}  
    End If )yP>}ME  
Next i g)9/z  
    rt(0) = Sqr(nb) M<)2  
    rr = rt() .9xGLmg  
  End If ;Ki1nq5c#s  
         3KKe4{oG  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  $|(|Qzi%  

S}^s5ztm  
有热压工艺方面的人才或者资料分享下； =t
$mbI   
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 4Qel;  

高手真多！

楼主威武霸气.