[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  
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关键点说几个： EiJSLL  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 2YwV}  
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 ke3=s  
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 _|A)ueY  

以下是几个重要的函数： tkuN$Jl  
1.判断点在区域中函数 iicrRGp3  
2.计算夹角函数 ,YkQJ$  
3.转置函数 *\joaw  
4.得到区域中心点，及区域半径函数 vxqMo9T  
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） <M$hj6.tn  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 =r_ SMTu  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ^MddfBwk  
   cax = x2 - x1 !4 hs9b  
   cay = y2 - y1 Ft>ixn  
   cbx = x2 - x3 _aDx('  
   cby = y2 - y3 ~Yr.0i.W  
   mo_jj = cax * cbx + cay * cby nEGku]pCH{  
   mo_ca = Sqr(cax * cax + cay * cay) 3)3'-wu  
   mo_cb = Sqr(cbx * cbx + cby * cby) @ym7hk.  
   cos_acb = mo_jj / (mo_ca * mo_cb) k~q[qKb8y:  
   'ff_cos = cos_acb m.^6ef  
   If cos_acb >= 1 Then ~Snw':  
   nn = 0 RMv
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   ElseIf cos_acb <= -1 Then *uv\V@0  
   nn = 3.14159265258979 S((8DSt*  
   Else }Ns_RS$  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ~(&xBtg:}  
   End If f a\cLC  
   'ff_angle = nn /NkZ;<uxJ  
   ff_angle = nn * 180 / 3.14159265258979 k,@1rOf  
End Function

'判断点在区域内函数 8ziYav  
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 %(e=Q^=  
Dim aob, boc, cod, doa, sum As Single DMf9wB  
  If ppx = p1x And ppy = p1y Then Bo0y"W[+  
     point_in = True K{iayg!k  
     Exit Function tou^p-)GQ|  
  End If utTek5/  
  If ppx = p2x And ppy = p2y Then TxiJ?sDh*  
     point_in = True  o j^U  
     Exit Function j=gbUXv/  
  End If \UC4ai2MK  
   If ppx = p3x And ppy = p3y Then '*-SvA\Cx  
     point_in = True P9'5=e@jB  
     Exit Function awawq9)Y  
  End If l9jcoVo.  
     3dM6zOK
  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) H}$#aXEAn  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) lu{}j4  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) AH} nTm  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) EtL=_D-  
    sum = aob + boc + cod + doa l-Xx
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    If 360.01 > sum And sum > 359.99 Then NMDNls&)k  
       point_in = True Y.73I83-j  
    Else eGE%c1H9a  
       point_in = False |'J3"am'  
    End If cshUxabB  
End Function

'得到点半径,得到交点坐标函数 @N(jd($E  
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() $-y+97  
    '求得中心点坐标 L=p.@VSZ  
Dim tt As String _E%[D(  
Dim rt(3) As Single V.F 's(o  
    '判断是否平行 _5)#{o<  
   acx = p3x - p1x A
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   acy = p3y - p1y EvYw$
j  
   bdx = p4x - p2x Vy9n3W"FB1  
   bdy = p4y - p2y d!d 3r W;A  
   If acx * bdy = acy * bdx Then .xx#>Y-\  
      rt(0) = 0 ! $iR:ji  
      Exit Function ;L[9[uQ[C  
   Else }}2kA  
      '判断斜率存在否 UqHOS{\Sz  
      If p1x = p3x And p2x <> p4x Then Ao\Vh\rQkq  
         tt = "ac_n_bd_y" bXW)n<y  
      ElseIf p1x <> p3x And p2x = p4x Then 9j 8t<5s  
         tt = "ac_y_bd_n" ~;+vF
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      ElseIf p1x <> p3x And p2x <> p4x Then Y1~SGg7(@  
         tt = "ac_y_bd_y" ky#6M? \  
      End If ~L1O\V i  
    Select Case tt 8N`$7^^  
         Case "ac_n_bd_y" e!8_3BE  
            'bd线段方程 6?lg 6a/eO  
            k_bd = bdy / bdx Yyo|W;a]  
            b_bd = p2y - k_bd * p2x {aL$vgYT1  
            p_x = p1x 98]t"ny [  
            p_y = k_bd * p_x + b_bd g IKm  
         Case "ac_y_bd_n" <d^7B9O?&w  
            'ac线段方程 WU4i-@Bm8  
            k_ac = acy / acx !$?@;}=  
            b_ac = p1y - k_ac * p1x D6]$P%t9  
            p_x = p2x K8Y/XE
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            p_y = k_ac * p_x + b_ac $O>@(K  
        Case "ac_y_bd_y" I Q L~I13  
           'ac，bd线段都要求 ;Y'\:  
           k_ac = acy / acx nsp K.*?  
           b_ac = p1y - k_ac * p1x 3azc`[hl  
           k_bd = bdy / bdx e^GW[lT  
           b_bd = p2y - k_bd * p2x C{Ug ?hVP  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) B#MW`
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           p_y = k_ac * p_x + b_ac iK]g3ew|  
        End Select ]aRD6F:L  
      rt(1) = p_x S=g-&lK  
      rt(2) = p_y 5%`Ul  
     J9FNjM[qe  
'计算最大半径 WK}+f4tdW[  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) }ELCnN  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) |BkY"F7m9  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ?>8zU;Aj  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) %MJ
7u}  
Dim bb(5) As Single PQ]9xzOg[  
  bb(1) = rr1 @qDrTH]5  
  bb(2) = rr2 `.W;ptZ6  
  bb(3) = rr3 % 4"~O _S  
  bb(4) = rr4 5Nb_K`Vp*  
  nb = rr1 PoJyWC  
For i = 1 To 4 5ecz'eA%  
    If nb <= bb(i) Then g)A0PvEu  
       nb = bb(i) ss{=::#  
    End If D:E_h  
Next i Q$0%~`t
 
    rt(0) = Sqr(nb) ]M(f^  
    rr = rt() sri#L+I  
  End If -C}59G8  
         }hitU(5t0  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  }\939Y  

g{W6a2  
有热压工艺方面的人才或者资料分享下； f>)Tq'  
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 .p(6' TYnI  

高手真多！

楼主威武霸气.