[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： I tn?''~;  
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描述:请输入描述

图片:2.jpg

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关键点说几个： `tsqnw  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） FLlL0Gu  
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 J0Y-e39 `  
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 Lj3q?>D*^6  

以下是几个重要的函数： t#J #DyY5  
1.判断点在区域中函数 `!T
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2.计算夹角函数 +hvVoBCM*  
3.转置函数 }%-`CJ,  
4.得到区域中心点，及区域半径函数 65A>p:OO  
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） K>$od^f%c  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 F;&'C$%  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single "mE<r2=@  
   cax = x2 - x1 >!YI7)  
   cay = y2 - y1 HgX4RSU  
   cbx = x2 - x3 1<qq69x  
   cby = y2 - y3 VL<)d-  
   mo_jj = cax * cbx + cay * cby `}u~nu<  
   mo_ca = Sqr(cax * cax + cay * cay) A|@d4+  
   mo_cb = Sqr(cbx * cbx + cby * cby) FyQ^@@  
   cos_acb = mo_jj / (mo_ca * mo_cb) .,x08M  
   'ff_cos = cos_acb nyPA
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   If cos_acb >= 1 Then b_=k"d  
   nn = 0 Z;i^h,j?$1  
   ElseIf cos_acb <= -1 Then ;xa]ke3]  
   nn = 3.14159265258979 ^f1}:g  
   Else r jL%M';  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) T,gMc  
   End If ^IM;D)X&:  
   'ff_angle = nn 15gI-Qb  
   ff_angle = nn * 180 / 3.14159265258979 F+A
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End Function

'判断点在区域内函数 W?/7PVGv5h  
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 q^dI!93n|  
Dim aob, boc, cod, doa, sum As Single ipKk
z  
  If ppx = p1x And ppy = p1y Then poHDA=# 3  
     point_in = True 4k$BqM1  
     Exit Function -D.6@@%Kc}  
  End If JCaT^KLz  
  If ppx = p2x And ppy = p2y Then S3j/(BG  
     point_in = True XUUS N  
     Exit Function Q.6pmaXrb  
  End If f+$/gz  
   If ppx = p3x And ppy = p3y Then oChcEx%  
     point_in = True hlkf|H  
     Exit Function it>FG9hVo  
  End If o~^hsm[44J  
     ]Wv\$JXI  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) FQ(=Fnqn  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Nc]oAY  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 7,jh44(\=  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 9[6*FAFJPP  
    sum = aob + boc + cod + doa Pd^ilRB  
    If 360.01 > sum And sum > 359.99 Then )X| uOg&|  
       point_in = True ~"}-cl,  
    Else jPA?0h  
       point_in = False eB!0:nHN  
    End If =`vUWO
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End Function

'得到点半径,得到交点坐标函数 0$/wH#f  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() v*l1"0$  
    '求得中心点坐标 ep
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Dim tt As String )>$xbo")k  
Dim rt(3) As Single X )g
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    '判断是否平行 (?YTQ8QR  
   acx = p3x - p1x sRb)*p'  
   acy = p3y - p1y 0P\)L`cG  
   bdx = p4x - p2x nY}Ep\g  
   bdy = p4y - p2y (+bk +0  
   If acx * bdy = acy * bdx Then RNp3lXf O  
      rt(0) = 0 #$X_,P|D  
      Exit Function f#/v^Ql*  
   Else &kRkOjuk  
      '判断斜率存在否 x@Z?DS$)  
      If p1x = p3x And p2x <> p4x Then i4v7x;m_p  
         tt = "ac_n_bd_y" SgFyv<6>:  
      ElseIf p1x <> p3x And p2x = p4x Then ;wgm 'jr  
         tt = "ac_y_bd_n" }N*6xr*X+  
      ElseIf p1x <> p3x And p2x <> p4x Then z)yxz:E  
         tt = "ac_y_bd_y" ix$?/GlL  
      End If [|xHXcW  
    Select Case tt z9YC9m)jK  
         Case "ac_n_bd_y" )1Os+0az  
            'bd线段方程 70a7}C\/o  
            k_bd = bdy / bdx ?7/n s>}  
            b_bd = p2y - k_bd * p2x >Ex\j?  
            p_x = p1x 2\lUaC#E  
            p_y = k_bd * p_x + b_bd X]tjT  
         Case "ac_y_bd_n" hf8=r5j=  
            'ac线段方程 k P>G4$e_v  
            k_ac = acy / acx j!qO[CJJ  
            b_ac = p1y - k_ac * p1x FSIV\ u  
            p_x = p2x RAR"9 N .  
            p_y = k_ac * p_x + b_ac d9sl(;r  
        Case "ac_y_bd_y" H)G ^ Y1  
           'ac，bd线段都要求
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           k_ac = acy / acx ?msx  
           b_ac = p1y - k_ac * p1x /Rb`^n#  
           k_bd = bdy / bdx |wKZ-6  
           b_bd = p2y - k_bd * p2x N3TkRJZ  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 8BhLO.(<O  
           p_y = k_ac * p_x + b_ac &M*&oi (  
        End Select J,_I$* _0  
      rt(1) = p_x uK="#1z cC  
      rt(2) = p_y /4<eI3Z  
     smF#'"{  
'计算最大半径 J}hi)k  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Nf%jLK~  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) (SfP3  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) e 9U\48  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Ef;_im  
Dim bb(5) As Single 5 b( [1*  
  bb(1) = rr1 3YR6@*!f/  
  bb(2) = rr2 =oV8!d%]  
  bb(3) = rr3 c1'OIK C  
  bb(4) = rr4 h3h2 KqM'  
  nb = rr1 S92'\2  
For i = 1 To 4 Jb#*QJ=  
    If nb <= bb(i) Then MP-A^QT  
       nb = bb(i) M6jP>fbV*  
    End If A5Qzj]{ba  
Next i &G@(f=  
    rt(0) = Sqr(nb) :G?"BL5vP  
    rr = rt() $Ud-aRlD  
  End If $h`?l$jC(@  
         G9<pYt{:  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Na=9ju  

-v8Jn#f  
有热压工艺方面的人才或者资料分享下； $]:I1I  
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  V7%G?  

高手真多！

楼主威武霸气.