[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： la 0:jO5  
+s`cXTlFrk  
w6mYLK%  

关键点说几个： fF9hL3h?)  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） -3b_}b
y  
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 o^owv(  
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 ICe;p V  

以下是几个重要的函数： ,i;#e  
1.判断点在区域中函数 -m ;n}ECg  
2.计算夹角函数 # M!1W5#  
3.转置函数 oQo5y_o~  
4.得到区域中心点，及区域半径函数 44Y
KS>Cq  
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） JZ:yPvJ  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 fWi/mK3c  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single )t\aB_ =  
   cax = x2 - x1 p7r/`_'|  
   cay = y2 - y1 '4Qsl~[Eh  
   cbx = x2 - x3 o?a3hD  
   cby = y2 - y3 m_`%#$s}  
   mo_jj = cax * cbx + cay * cby b&LAk-}[  
   mo_ca = Sqr(cax * cax + cay * cay) ?0+g.,9  
   mo_cb = Sqr(cbx * cbx + cby * cby) `
c-omNu  
   cos_acb = mo_jj / (mo_ca * mo_cb) n"Bc2}{  
   'ff_cos = cos_acb ]bpgsW:Xu  
   If cos_acb >= 1 Then /5j5\F:33  
   nn = 0 %*Uc,V  
   ElseIf cos_acb <= -1 Then {0-rnSjC  
   nn = 3.14159265258979 >V]9<*c  
   Else E\;%,19Ob  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Z;RUxe|<k  
   End If 1v,R<1)&  
   'ff_angle = nn 6f ?,v5  
   ff_angle = nn * 180 / 3.14159265258979 |')PQ  
End Function

'判断点在区域内函数 Ude?[6  
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 eR6vO5to  
Dim aob, boc, cod, doa, sum As Single K{"hf:k  
  If ppx = p1x And ppy = p1y Then )4c?BCgy  
     point_in = True EUQtl_h/H  
     Exit Function o; U!{G(X  
  End If ;^E_BJm  
  If ppx = p2x And ppy = p2y Then kLU-4W5t  
     point_in = True D3P/: 4  
     Exit Function 5/7(>ivn  
  End If _nxH
;Za  
   If ppx = p3x And ppy = p3y Then }^p<Y5{b  
     point_in = True H6|eUU[&  
     Exit Function x-%RRm<V  
  End If VY+P c/b  
     RtpV08s\  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) (K84J*;  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) `.3@Ki~$#  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ?2dI8bG  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) .Y^cs+-o  
    sum = aob + boc + cod + doa
Z*UVbyC  
    If 360.01 > sum And sum > 359.99 Then <'SS IMr  
       point_in = True *h3iAcM8  
    Else ,-8-Y>[  
       point_in = False }*xjO/Ey  
    End If $uyx  
End Function

'得到点半径,得到交点坐标函数 WulyMcJ  
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() #u8#< ,w  
    '求得中心点坐标 yGAFQ|+  
Dim tt As String Y68A+ B.  
Dim rt(3) As Single kROIVO1|`  
    '判断是否平行 Z${eDl6i  
   acx = p3x - p1x uW=G1 *n-  
   acy = p3y - p1y ]77f`<q<}!  
   bdx = p4x - p2x 0F/[GZ<k  
   bdy = p4y - p2y
2Ki_d  
   If acx * bdy = acy * bdx Then S)j(%
g  
      rt(0) = 0 09jE7g @X}  
      Exit Function Y<irNp9  
   Else ~~-VScG&  
      '判断斜率存在否 2%`= LGQC  
      If p1x = p3x And p2x <> p4x Then oeZuvPCl  
         tt = "ac_n_bd_y" Abt<23$h  
      ElseIf p1x <> p3x And p2x = p4x Then HdB>CVuh  
         tt = "ac_y_bd_n" xUsL{24  
      ElseIf p1x <> p3x And p2x <> p4x Then -$[&{.B.  
         tt = "ac_y_bd_y" m}s.a.x  
      End If -mG`* 0  
    Select Case tt Zp~yemERr  
         Case "ac_n_bd_y"
2tpuv(H;  
            'bd线段方程 T>rmm7F  
            k_bd = bdy / bdx Q+9:]Bt  
            b_bd = p2y - k_bd * p2x rlY0UA,  
            p_x = p1x vB_3lAJt@  
            p_y = k_bd * p_x + b_bd K3[+L`pz  
         Case "ac_y_bd_n" pa+'0Y]71  
            'ac线段方程 rpm\!O  
            k_ac = acy / acx aXJ/"k #Tl  
            b_ac = p1y - k_ac * p1x (b<0=U  
            p_x = p2x E(|A"=\  
            p_y = k_ac * p_x + b_ac fPUr O  
        Case "ac_y_bd_y" j7kX"nz  
           'ac，bd线段都要求 A`f"<W-m  
           k_ac = acy / acx 1Ng.Ukb  
           b_ac = p1y - k_ac * p1x 6Uk+a=Ar  
           k_bd = bdy / bdx \j62"

  
           b_bd = p2y - k_bd * p2x wb?k  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) YxJQ^D
`  
           p_y = k_ac * p_x + b_ac ;6[6~L%K}  
        End Select NF6xKwRU]_  
      rt(1) = p_x lsOv#X-bE  
      rt(2) = p_y /ta}12Z  
     '%[ Y  
'计算最大半径 l X+~;94  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) bAZoi0LR  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) W?
.469yy  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) &
3Zb?  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) -?)^ hbr  
Dim bb(5) As Single :)lG}c  
  bb(1) = rr1 xBTx`+%WS  
  bb(2) = rr2 nJN-U+)u  
  bb(3) = rr3 W{"sB:E  
  bb(4) = rr4 \~E?;q!  
  nb = rr1 'lA}E  
For i = 1 To 4 :.e'?a  
    If nb <= bb(i) Then &`l\Q\_[@  
       nb = bb(i) uv/\1N;V3  
    End If znsQ/[  
Next i nwKp8mfP  
    rt(0) = Sqr(nb) [q2:d^_F
A  
    rr = rt() uNyN[U  
  End If : x&R'wX-  
         F~ 5,-atDM  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  M)oKtiav*  

x9Z89Gwi  
有热压工艺方面的人才或者资料分享下； ,N(Yjq"R  
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 J~5V7B  

高手真多！

楼主威武霸气.