[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： >Zh^,T={G  
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关键点说几个： 8$38>cGY^  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ORFi0gFbA  
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 v-}B T+  
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 QT\"r T9#  

以下是几个重要的函数： Zz!yv(e)H  
1.判断点在区域中函数 &"clBRVg  
2.计算夹角函数 ~>rnq7j  
3.转置函数 G@rV9  
4.得到区域中心点，及区域半径函数 q5~"8]Dls  
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） CykvTV Q  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 )No>Q :t  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single QQQN}!xPj  
   cax = x2 - x1 AP0z~
e  
   cay = y2 - y1 YeB)]$'?u`  
   cbx = x2 - x3 L+.-aB2!d  
   cby = y2 - y3 W.?EjEx  
   mo_jj = cax * cbx + cay * cby |yi#6!}^  
   mo_ca = Sqr(cax * cax + cay * cay) M~5Ja0N~  
   mo_cb = Sqr(cbx * cbx + cby * cby) "(vm0@8><  
   cos_acb = mo_jj / (mo_ca * mo_cb) 3j/~XT  
   'ff_cos = cos_acb a4Y43n  
   If cos_acb >= 1 Then c='uyx  
   nn = 0 -"d&Ow7o  
   ElseIf cos_acb <= -1 Then fPab%>/T{  
   nn = 3.14159265258979 "T~A*a^  
   Else W4]jx]  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Vs, &  
   End If W!)B%.Q  
   'ff_angle = nn ShJBOaE; -  
   ff_angle = nn * 180 / 3.14159265258979 I?KGb:]|  
End Function

'判断点在区域内函数 oZw#]Q@  
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 ilkN3J  
Dim aob, boc, cod, doa, sum As Single P@8S|#LpZ  
  If ppx = p1x And ppy = p1y Then ;f9a0Vs  
     point_in = True C ,#D4  
     Exit Function EsjZ;D,c(  
  End If n*A"}i`ix  
  If ppx = p2x And ppy = p2y Then ?pkGejcQ  
     point_in = True Wrs6t  
     Exit Function o*:D/"gb  
  End If s@pIcNvx  
   If ppx = p3x And ppy = p3y Then "]x#kM  
     point_in = True 2\9OT>  
     Exit Function b^
WF R   
  End If qw}. QwPT  
     52'0l>  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) D[<~^R;*  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 58gkE94  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) QI6=[  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) c>L#(D\\  
    sum = aob + boc + cod + doa }/}eZCa
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    If 360.01 > sum And sum > 359.99 Then )X'ln  
       point_in = True 3(=QY)  
    Else MbyV_A`r_  
       point_in = False x1`zD*{  
    End If `_ )5K u}  
End Function

'得到点半径,得到交点坐标函数 o3a%u
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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() -e_B  
    '求得中心点坐标 Zxn>
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Dim tt As String lfyij[6q+  
Dim rt(3) As Single %QFeQ(b/(  
    '判断是否平行 XrN]}S$N  
   acx = p3x - p1x gv/yfiA?  
   acy = p3y - p1y
N3@gvS  
   bdx = p4x - p2x !s47A"O&B  
   bdy = p4y - p2y ad`=A V]  
   If acx * bdy = acy * bdx Then la89>pF  
      rt(0) = 0 15"[MX A
 
      Exit Function aIklAj)=  
   Else %DuSco"  
      '判断斜率存在否 qHC/)M#L  
      If p1x = p3x And p2x <> p4x Then GW!%DT  
         tt = "ac_n_bd_y" Pt?d+aBtV  
      ElseIf p1x <> p3x And p2x = p4x Then ts;C:.X  
         tt = "ac_y_bd_n" '2v$xOh!y  
      ElseIf p1x <> p3x And p2x <> p4x Then AqjEz+TVt  
         tt = "ac_y_bd_y" 7*g'4p-  
      End If -59;Zn/  
    Select Case tt vKTCS  
         Case "ac_n_bd_y" GFgh{'|  
            'bd线段方程 &|c] U/_w  
            k_bd = bdy / bdx `;z;=A*  
            b_bd = p2y - k_bd * p2x xqzB=0  
            p_x = p1x 9~yp=JOV@  
            p_y = k_bd * p_x + b_bd y+P$}Nru  
         Case "ac_y_bd_n" yI8 /m|  
            'ac线段方程 Rmh u"N/q  
            k_ac = acy / acx +M.!_2t$2  
            b_ac = p1y - k_ac * p1x <<+Hs/ ]  
            p_x = p2x `g:bvIV5x>  
            p_y = k_ac * p_x + b_ac m,#Us  
        Case "ac_y_bd_y" K]yUPx  
           'ac，bd线段都要求 TPWqiA?3Cp  
           k_ac = acy / acx "Sd2VSLg  
           b_ac = p1y - k_ac * p1x A?Gk8  
           k_bd = bdy / bdx @po|07  
           b_bd = p2y - k_bd * p2x &1ss @-  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) }7Y@u
@R  
           p_y = k_ac * p_x + b_ac cT3s{k  
        End Select U$T (R2@  
      rt(1) = p_x D]WU,a[$Bc  
      rt(2) = p_y x).`nZ1  
     6cbIs_g  
'计算最大半径 yNN_}9  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) <PXnR\  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) J)_IfbY  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 3k5F$wf  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) #{|
F2AM  
Dim bb(5) As Single I>45xVA  
  bb(1) = rr1 mY/x|)MmM  
  bb(2) = rr2 h/\/dp/tt  
  bb(3) = rr3 5'"l0EuD  
  bb(4) = rr4 =.f<"P51k  
  nb = rr1 s&Ml1A:  
For i = 1 To 4 &*!) d"  
    If nb <= bb(i) Then n]J;BW&Av  
       nb = bb(i) 7g
&<ZZo  
    End If j!hdi-aTU  
Next i
`#>JRQ=  
    rt(0) = Sqr(nb) R*z:+p}oHy  
    rr = rt() jGKasI`  
  End If =@"'aCU/  
         rklK=W z  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Da8{==  

nt*nTtcE  
有热压工艺方面的人才或者资料分享下； pswEIa  
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 TScI_8c>  

高手真多！

楼主威武霸气.