[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： ][8ZeM9&p  
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关键点说几个： Y|FJ1x$r  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ~8AcW?4Z  
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 %\?2W8Qv_J  
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 cDMA#gp  

以下是几个重要的函数： kQX
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1.判断点在区域中函数 E 5PefD\m  
2.计算夹角函数 6dO )]  
3.转置函数 V2kNJwwk  
4.得到区域中心点，及区域半径函数 _|.q?;C]$  
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*$ExF  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 c,;-[s
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Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Kl~jcq&z  
   cax = x2 - x1 5%C-eB  
   cay = y2 - y1 n\aG@X%oq  
   cbx = x2 - x3 {zhN>n_  
   cby = y2 - y3 CZg$I&x  
   mo_jj = cax * cbx + cay * cby OpmI" 4{+  
   mo_ca = Sqr(cax * cax + cay * cay) Jla ;^X  
   mo_cb = Sqr(cbx * cbx + cby * cby) nb0V~W  
   cos_acb = mo_jj / (mo_ca * mo_cb)
;Ad$Q9)EE  
   'ff_cos = cos_acb +9>t; Ty  
   If cos_acb >= 1 Then _O~DJ"  
   nn = 0 D 4^2F(YRX  
   ElseIf cos_acb <= -1 Then gTZ1LJ  
   nn = 3.14159265258979 w$UWfL(  
   Else <T JUKznO  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) bY7d  
   End If Fn4i[|W42  
   'ff_angle = nn H `Fe|6I&  
   ff_angle = nn * 180 / 3.14159265258979 [#V?]P\uV  
End Function

'判断点在区域内函数 <zH24[  
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 ]cLO-A  
Dim aob, boc, cod, doa, sum As Single P#bZtWx'<N  
  If ppx = p1x And ppy = p1y Then 0t?:  
     point_in = True p7}xgUxX  
     Exit Function ?n9gqwO  
  End If !_)*L+7f_  
  If ppx = p2x And ppy = p2y Then Jj}+tQf  
     point_in = True l[mXbQd  
     Exit Function rI)op1K  
  End If }6MHIr=o  
   If ppx = p3x And ppy = p3y Then LC)-aw>-  
     point_in = True _U;z@  
     Exit Function 9m MPkgc  
  End If ;QQLYT  
     gtWJR  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ^@e4mO  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) gH5E+J_$  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) +gh6eY8  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) -Zd0[& ']  
    sum = aob + boc + cod + doa k\X1`D}R  
    If 360.01 > sum And sum > 359.99 Then =b2/g[  
       point_in = True >QV=q`I  
    Else  +T02AS  
       point_in = False SbI %|  
    End If <m:8%]%M6  
End Function

'得到点半径,得到交点坐标函数 }S|~^  
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() '=}F}[d"kk  
    '求得中心点坐标 aj;OG^(!2_  
Dim tt As String Xi`K`Cu+  
Dim rt(3) As Single Kk|uN#m  
    '判断是否平行 7xidBVx  
   acx = p3x - p1x v?Q&06PMRc  
   acy = p3y - p1y FYh+G-Y#  
   bdx = p4x - p2x mb_*FJB-_  
   bdy = p4y - p2y QyN<o{\FD!  
   If acx * bdy = acy * bdx Then R:8\z0"L*  
      rt(0) = 0 ]Gm"U!h*  
      Exit Function H.#<&5f  
   Else $/sIdFZi  
      '判断斜率存在否 jA9&hbQuL  
      If p1x = p3x And p2x <> p4x Then iX,|;J|]  
         tt = "ac_n_bd_y" dV(61C0wn  
      ElseIf p1x <> p3x And p2x = p4x Then i|A0G%m]$  
         tt = "ac_y_bd_n" t_cNH@^3<3  
      ElseIf p1x <> p3x And p2x <> p4x Then #)hc^gIO&<  
         tt = "ac_y_bd_y" 4,kdP)Md$  
      End If AB92R/  
    Select Case tt M-Gl".*f  
         Case "ac_n_bd_y" dNd(57  
            'bd线段方程 ^ 'W<|  
            k_bd = bdy / bdx Kppi N+||  
            b_bd = p2y - k_bd * p2x Jb+cC)(  
            p_x = p1x 4 0as7.q  
            p_y = k_bd * p_x + b_bd 1#BMc%  
         Case "ac_y_bd_n" ;Gf,$dbWn  
            'ac线段方程 8bT]NvCA  
            k_ac = acy / acx v%8.o%G  
            b_ac = p1y - k_ac * p1x _?Q0yVH;,  
            p_x = p2x @T>\pP]o  
            p_y = k_ac * p_x + b_ac (/6~*<ZGT  
        Case "ac_y_bd_y" }U-h^x'  
           'ac，bd线段都要求 ~wtl\-cY  
           k_ac = acy / acx Se*o{V3s$  
           b_ac = p1y - k_ac * p1x 701ei;  
           k_bd = bdy / bdx 
M:&g5y&  
           b_bd = p2y - k_bd * p2x i> }P V  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) `a*_b9  
           p_y = k_ac * p_x + b_ac op!8\rM<e  
        End Select t.0F  
      rt(1) = p_x d~#>.$Uu  
      rt(2) = p_y RE~9L5i5  
     z^;0{q,  
'计算最大半径 UqJ}5{rt  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) _J' _9M?>  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) PL*Mz(&bf  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) AP1Eiv<Hub  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) #6w\r&R6  
Dim bb(5) As Single [1Cs  
  bb(1) = rr1 xLID@9Hbu  
  bb(2) = rr2 ,+LX.f&/8!  
  bb(3) = rr3 r57CyO  
  bb(4) = rr4 AunX[X9  
  nb = rr1 0^?:Zds  
For i = 1 To 4 :x85:pa  
    If nb <= bb(i) Then ep|>
z#1  
       nb = bb(i) $Sz@u"ig%  
    End If M1UabqQ  
Next i \9r1JP0  
    rt(0) = Sqr(nb) ^t X}5i`P  
    rr = rt() ."HDUo2D7  
  End If dY|~"6d)  
         =~qQ?;on  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  fV>12ici  

@Yu=65h  
有热压工艺方面的人才或者资料分享下； @7}
]\}SR  
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 ~_XK<}SK  

高手真多！

楼主威武霸气.