[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： vd%g'fTy9  
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关键点说几个： XO+BZB`F  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域）
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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@{uG0'3  
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 r9[S%Def  

以下是几个重要的函数： EA"hie7  
1.判断点在区域中函数 Gv-VDRS  
2.计算夹角函数 xl&@g)Jj  
3.转置函数 ,aP6ct  
4.得到区域中心点，及区域半径函数 y )QLR<wf  
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） "#1\uoH  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 V*vQNPey  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Y2`sL,'h  
   cax = x2 - x1 _.5{vGyxr  
   cay = y2 - y1 wC1pfXa  
   cbx = x2 - x3 }z`x-(V  
   cby = y2 - y3 67j kU!  
   mo_jj = cax * cbx + cay * cby @{/)k%U  
   mo_ca = Sqr(cax * cax + cay * cay) z?byNd8  
   mo_cb = Sqr(cbx * cbx + cby * cby)
JRl=j2z  
   cos_acb = mo_jj / (mo_ca * mo_cb) ]A5F}wV4  
   'ff_cos = cos_acb B/agW  
   If cos_acb >= 1 Then x3+ -wv  
   nn = 0 wHLQfrl0  
   ElseIf cos_acb <= -1 Then cMT7Bd  
   nn = 3.14159265258979 A8% e_XA  
   Else Z RVt2  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) x-%O1frc  
   End If 0L}`fYf  
   'ff_angle = nn Zbczbnj  
   ff_angle = nn * 180 / 3.14159265258979 1Lb)S@Q`*R  
End Function

'判断点在区域内函数 AiHU*dp6  
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$\-]N+  
Dim aob, boc, cod, doa, sum As Single |8` }8vo)  
  If ppx = p1x And ppy = p1y Then M5I`
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     point_in = True k4{!h?h  
     Exit Function `l|Oj$  
  End If hz/mNDE]  
  If ppx = p2x And ppy = p2y Then c=v016r\  
     point_in = True }a"=K%b<\  
     Exit Function [UwQi!^-O  
  End If /pF8S!,z  
   If ppx = p3x And ppy = p3y Then , z\Qd07u  
     point_in = True klKUX/g  
     Exit Function Cu@q*:'  
  End If DuC#tDP  
     "`M~=RiI  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) "](Q2  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) lf"w/pb
'  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) SPqJ [F  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) QGN+f)  
    sum = aob + boc + cod + doa 7;Ze>"W>  
    If 360.01 > sum And sum > 359.99 Then &$s:h5HoX  
       point_in = True vjX,7NY?  
    Else %oiF} >  
       point_in = False 3I 0pHP5  
    End If b36{vcs~  
End Function

'得到点半径,得到交点坐标函数 q:kGJxfaW  
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() r(Sh  
    '求得中心点坐标 }"+"nf5h  
Dim tt As String xY?p(>(  
Dim rt(3) As Single g7323m1=  
    '判断是否平行 (A=PDjP!  
   acx = p3x - p1x C9+rrc@4  
   acy = p3y - p1y zuNm!$  
   bdx = p4x - p2x ~Bl,_?CBr  
   bdy = p4y - p2y cq>J]35  
   If acx * bdy = acy * bdx Then wfO-bzdw  
      rt(0) = 0 O
Gcdv{,P  
      Exit Function -`8@  
   Else ft7M9<#v  
      '判断斜率存在否 ]]y>d!  
      If p1x = p3x And p2x <> p4x Then
8^EWD3N`  
         tt = "ac_n_bd_y" y9mV6.r  
      ElseIf p1x <> p3x And p2x = p4x Then AyQ5jkIE^{  
         tt = "ac_y_bd_n" u$tst_y-  
      ElseIf p1x <> p3x And p2x <> p4x Then uKzx >\}?1  
         tt = "ac_y_bd_y" > 3x^jh  
      End If ac\aH#J_nC  
    Select Case tt ;|K }  
         Case "ac_n_bd_y" {;Hg1=cm  
            'bd线段方程  }c||$  
            k_bd = bdy / bdx 3B;Gm<fJ9N  
            b_bd = p2y - k_bd * p2x 1q;R+65  
            p_x = p1x  MMk9rBf  
            p_y = k_bd * p_x + b_bd V=fu[#<@Ig  
         Case "ac_y_bd_n" E uO:}[  
            'ac线段方程 V}TPt6C2  
            k_ac = acy / acx ]*]*O|w  
            b_ac = p1y - k_ac * p1x H.M: cD:  
            p_x = p2x ax5n}  
            p_y = k_ac * p_x + b_ac _S[@?]=`b  
        Case "ac_y_bd_y" n<|8Onw  
           'ac，bd线段都要求 UxMy8}w!y  
           k_ac = acy / acx 27R4B O  
           b_ac = p1y - k_ac * p1x 8oUR/___  
           k_bd = bdy / bdx sRLjKi2D  
           b_bd = p2y - k_bd * p2x ~*1Z1aZ  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) y}FG5'5$13  
           p_y = k_ac * p_x + b_ac $'}|/D  
        End Select GR(m+%Vw!  
      rt(1) = p_x 5Bq;Vb  
      rt(2) = p_y f4\
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     m!zvt   
'计算最大半径 wY8Vc"  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) p]X+#I<  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Uf_mwEE  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) C%z9Q  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Dd0yQgCu  
Dim bb(5) As Single sAO/yG  
  bb(1) = rr1 44n41.Q]  
  bb(2) = rr2 us5Zi#}  
  bb(3) = rr3 & :W6O)uY  
  bb(4) = rr4 Te!eM{_$T  
  nb = rr1 &Odrq#o?R  
For i = 1 To 4 *kf%?T.  
    If nb <= bb(i) Then LDw.2E  
       nb = bb(i) o;9H~E  
    End If P\[K)N/1  
Next i 902A,*qq  
    rt(0) = Sqr(nb) aA*h*  
    rr = rt() H[g i`{c  
  End If _eQ-'")  
         s%#u)nw19  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  #LYx;[
D6  

xnZ  
有热压工艺方面的人才或者资料分享下； N9H qFp  
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 naY#`xig
 

高手真多！

楼主威武霸气.