[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： j,Pwket  
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关键点说几个： h=!M6yap<  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） .MzOLv  
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 |)m*
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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 <'yf|N
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以下是几个重要的函数： 14mXx}O  
1.判断点在区域中函数 _)OA$  
2.计算夹角函数 9Q,Msl4n  
3.转置函数 dDsjPM;2  
4.得到区域中心点，及区域半径函数 :D<:N*9i  
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） _!CK   
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 w{_e"N  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single V}vl2o
  
   cax = x2 - x1 [ c ~LY4:  
   cay = y2 - y1 ~C}
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   cbx = x2 - x3 54`bE$:+  
   cby = y2 - y3 f?/|;Zo4  
   mo_jj = cax * cbx + cay * cby 2neF<H?^o  
   mo_ca = Sqr(cax * cax + cay * cay) *,O :>Z5I  
   mo_cb = Sqr(cbx * cbx + cby * cby) dNR7e   
   cos_acb = mo_jj / (mo_ca * mo_cb) tqff84  
   'ff_cos = cos_acb w/lXZg  
   If cos_acb >= 1 Then Hv[d<ylO  
   nn = 0 pb=jvK  
   ElseIf cos_acb <= -1 Then _7-"VoX  
   nn = 3.14159265258979 O\|C,Epm  
   Else N+Q(V*:3v  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) \SYPu,ZT  
   End If Q\&AlV  
   'ff_angle = nn ?F?\uC2)'  
   ff_angle = nn * 180 / 3.14159265258979 xTa4.ZXg  
End Function

'判断点在区域内函数 V\iIvBpWg  
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 ?:#>^eWYe7  
Dim aob, boc, cod, doa, sum As Single ]>VJ--fH  
  If ppx = p1x And ppy = p1y Then t7U,AQ=;P5  
     point_in = True eZ8Y"i\!y  
     Exit Function _|^&eT-u  
  End If Ev$-PX  
  If ppx = p2x And ppy = p2y Then p%1xj2 ?nN  
     point_in = True sx;V,"Y  
     Exit Function 'T&=$9g7  
  End If +P> A P&  
   If ppx = p3x And ppy = p3y Then [[*0MA2Y  
     point_in = True Ux%\Y.PPI  
     Exit Function ="#:=i]  
  End If Vz7w{HY  
     :=iM$_tp'  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) eI/\I:G{f  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) `&|l;zsS  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) [T}%q"<  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) zJy 89ib'  
    sum = aob + boc + cod + doa By51dk7  
    If 360.01 > sum And sum > 359.99 Then Pv{,aV\I}  
       point_in = True 94qHY1rp  
    Else p5twL  
       point_in = False ;EE&~&*w  
    End If *oX  
End Function

'得到点半径,得到交点坐标函数 6'No4[F 4n  
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()
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    '求得中心点坐标 9GtVI^]  
Dim tt As String (8@hF#N1  
Dim rt(3) As Single f@F^W YQm  
    '判断是否平行 Il&"=LooZ  
   acx = p3x - p1x #g-*n@ 1  
   acy = p3y - p1y o$HJg  
   bdx = p4x - p2x z2s|.M]&-D  
   bdy = p4y - p2y r0?hX  
   If acx * bdy = acy * bdx Then
[A%e6  
      rt(0) = 0 sjkKaid  
      Exit Function a'>$88tl  
   Else 9 .&Or4>  
      '判断斜率存在否 G0 nH Z6  
      If p1x = p3x And p2x <> p4x Then FkxhEat8  
         tt = "ac_n_bd_y" k`2B9,z  
      ElseIf p1x <> p3x And p2x = p4x Then ;@7#w  
         tt = "ac_y_bd_n" PGv}fEH"  
      ElseIf p1x <> p3x And p2x <> p4x Then o trTrh  
         tt = "ac_y_bd_y" mtWx ?x  
      End If Q:fUM[  
    Select Case tt hPqapz]HcP  
         Case "ac_n_bd_y" pRxlvVt  
            'bd线段方程 %:be{Y6  
            k_bd = bdy / bdx YCB 3  
            b_bd = p2y - k_bd * p2x "13 :VTs[5  
            p_x = p1x vRb(eg  
            p_y = k_bd * p_x + b_bd sw qky5_K  
         Case "ac_y_bd_n" m)[wZP*e  
            'ac线段方程 -B3wRAEt  
            k_ac = acy / acx jKCqH$  
            b_ac = p1y - k_ac * p1x Eip~~2  
            p_x = p2x Xv5Ev@T  
            p_y = k_ac * p_x + b_ac P B6/<n9#  
        Case "ac_y_bd_y" v4k=NH+w  
           'ac，bd线段都要求 K}5$;W#  
           k_ac = acy / acx Bn#HJ17/#  
           b_ac = p1y - k_ac * p1x MBY
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           k_bd = bdy / bdx 8#Z\}gGz  
           b_bd = p2y - k_bd * p2x YZ%f7BUk  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) p3A-WK|NX  
           p_y = k_ac * p_x + b_ac Y
I),q.3X~  
        End Select 1:{O RX[;  
      rt(1) = p_x /=Uv  
      rt(2) = p_y _qzo):G.s  
     qYu!:xa8  
'计算最大半径 )r|zi Z{F  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) BE2\?q-  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) a+a%}76N  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) z`r4edk3  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) GLKN<2|2@y  
Dim bb(5) As Single (27F   
  bb(1) = rr1 aXK
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  bb(2) = rr2 ,tR'0&=  
  bb(3) = rr3 l& ^B   
  bb(4) = rr4 ;'
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  nb = rr1 ;k41+O:f@  
For i = 1 To 4 >'1Q"$;  
    If nb <= bb(i) Then v!'@NW_  
       nb = bb(i) OB i!fLa  
    End If ,cO)Sxj  
Next i NW>:Lz ?"  
    rt(0) = Sqr(nb) _467~5JkU  
    rr = rt() 8^"|-~
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  End If c{4nW|/W  
         Boj{+rE0  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  s/^=WV  

h4xdE0  
有热压工艺方面的人才或者资料分享下； #{`NJ2DU]  
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 u}0t`w:  

高手真多！

楼主威武霸气.