[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： `9/0J-7*  
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关键点说几个： iC\%_5/_  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） >Iuzk1'S  
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 :vpl+)n  
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 I?B,sl_w  

以下是几个重要的函数： k)cP! %
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1.判断点在区域中函数 w8p8 ;@  
2.计算夹角函数 [ 7g><  
3.转置函数 RND9D\7  
4.得到区域中心点，及区域半径函数 pr_>b`p6  
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） X3<K 1/<  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 E;9>ePd@  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single  S(  
   cax = x2 - x1 le8 #Z}p  
   cay = y2 - y1 d1c0l{JV3  
   cbx = x2 - x3 /`3#4=5-  
   cby = y2 - y3 eklgLU-+fW  
   mo_jj = cax * cbx + cay * cby 5pfYEofK[  
   mo_ca = Sqr(cax * cax + cay * cay) :Wc_Utt  
   mo_cb = Sqr(cbx * cbx + cby * cby) |0g{"}%  
   cos_acb = mo_jj / (mo_ca * mo_cb) KnGTcoXg_  
   'ff_cos = cos_acb MLr-, "gs  
   If cos_acb >= 1 Then 8PBvV[  
   nn = 0 U\zD,<I9  
   ElseIf cos_acb <= -1 Then dEp7{jY1O  
   nn = 3.14159265258979 ml0*1Dw  
   Else Su7bm1  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) q9]IIv  
   End If >P=Q #;v  
   'ff_angle = nn "g0(I8  
   ff_angle = nn * 180 / 3.14159265258979 T.ML$"f  
End Function

'判断点在区域内函数 \+ 0k+B4a  
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 +?dl
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Dim aob, boc, cod, doa, sum As Single [0y$! f4  
  If ppx = p1x And ppy = p1y Then 2VoKr)  
     point_in = True M{mSd2  
     Exit Function (Un_!)  
  End If m@Rtlb  
  If ppx = p2x And ppy = p2y Then =0   
     point_in = True Fmr}o(q1  
     Exit Function -7{$Vj  
  End If yZkyC'/  
   If ppx = p3x And ppy = p3y Then }H"kU2l  
     point_in = True bB}5U@G|  
     Exit Function (Pbg[AY  
  End If
AUe# RP  
     F?-R$<Cn2~  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) SUM4Di7  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) )"+2Z^1-  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ,9D+brm  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) =]C]=  
    sum = aob + boc + cod + doa `bjizS'^  
    If 360.01 > sum And sum > 359.99 Then 04U")-\O  
       point_in = True }"^'%C8EX  
    Else >>{FzR  
       point_in = False cV{o?3<:B  
    End If ACq7dLys,B  
End Function

'得到点半径,得到交点坐标函数 qqrq11W  
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() a^d8I  
    '求得中心点坐标 mtz#}qD66  
Dim tt As String UFAL1c<V  
Dim rt(3) As Single \;u@"  
    '判断是否平行 ,Uhb  
   acx = p3x - p1x _j?e~w&0b  
   acy = p3y - p1y 1K,1X(0rL8  
   bdx = p4x - p2x ,L bBpi=TJ  
   bdy = p4y - p2y %wcSM~w
 
   If acx * bdy = acy * bdx Then Ig]iT  
      rt(0) = 0 X4l@woh%  
      Exit Function &e-U5'(6v_  
   Else \.YS%"Vz  
      '判断斜率存在否 K*UgX(xu4P  
      If p1x = p3x And p2x <> p4x Then JM1R ;i6  
         tt = "ac_n_bd_y" w}Uhd,  
      ElseIf p1x <> p3x And p2x = p4x Then b306&ZVEk  
         tt = "ac_y_bd_n" HK|ynBAo  
      ElseIf p1x <> p3x And p2x <> p4x Then WOuEWw=  
         tt = "ac_y_bd_y" ib{-A&  
      End If Q'_z<V  
    Select Case tt Vq;dJ%sY  
         Case "ac_n_bd_y" iY"l
}.7)  
            'bd线段方程 H"ZZ.^"5FV  
            k_bd = bdy / bdx M9zfT!-  
            b_bd = p2y - k_bd * p2x #Zrlp.M4  
            p_x = p1x EdZ\1'&/9  
            p_y = k_bd * p_x + b_bd b&1`NO  
         Case "ac_y_bd_n" F1L:,.e`  
            'ac线段方程 ^&y$Wd]6  
            k_ac = acy / acx 34\(7JO  
            b_ac = p1y - k_ac * p1x F 8B#}%JE  
            p_x = p2x .9Y)AtJTS  
            p_y = k_ac * p_x + b_ac y~()|L[  
        Case "ac_y_bd_y" yR(x+Gs{]  
           'ac，bd线段都要求 da)NK!  
           k_ac = acy / acx Aq
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           b_ac = p1y - k_ac * p1x t%F0:SH  
           k_bd = bdy / bdx \=_{na_  
           b_bd = p2y - k_bd * p2x AU2i%Q!  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) =s<( P1|"  
           p_y = k_ac * p_x + b_ac qucq,Yw  
        End Select Qxj JN^Q  
      rt(1) = p_x \7CGUB>L  
      rt(2) = p_y KtNY_&xd  
     V+O"j^Z_J  
'计算最大半径 lRXK\xIP ,  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) itC-4^  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) rtc9wu  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) _%QhOY5tv"  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 72'5%*1  
Dim bb(5) As Single >$4d7.^hb/  
  bb(1) = rr1 I_R
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  bb(2) = rr2 _4g.j  
  bb(3) = rr3 W*2U="t  
  bb(4) = rr4 i>(e}<i  
  nb = rr1 VNY%R,6  
For i = 1 To 4 D-c`FG'  
    If nb <= bb(i) Then AvW:<}a,  
       nb = bb(i) Cg(Y&Gxf.  
    End If MG.` r{5  
Next i )==Jfn y  
    rt(0) = Sqr(nb) <u2}i<#  
    rr = rt() DY`kx2e!  
  End If R6(oZph  
         H- $)3"K  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Nn!+,;ut  

W3MJr&p  
有热压工艺方面的人才或者资料分享下； x!5'`A!W%  
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 um!J]N^  

高手真多！

楼主威武霸气.