[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： ?"[b408-  
Im i)YC  
?n9gqwO  

关键点说几个： tWy0% -  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ^c" wgRHc<  
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 -t2bHhG  
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 HM ;9%rtO  

以下是几个重要的函数： X}C}  
1.判断点在区域中函数 ;(AVZxCM  
2.计算夹角函数 7:'7EqM  
3.转置函数 nS'hdeoW  
4.得到区域中心点，及区域半径函数
~_R8; b  
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） 60?/Z2w5  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 eiE36+'>b  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single \D Oqx  
   cax = x2 - x1 @T>\pP]o  
   cay = y2 - y1 A"Q6GM2;Io  
   cbx = x2 - x3 ~wtl\-cY  
   cby = y2 - y3 "SGq$3D  
   mo_jj = cax * cbx + cay * cby 
M:&g5y&  
   mo_ca = Sqr(cax * cax + cay * cay) A|3'9i
L{9  
   mo_cb = Sqr(cbx * cbx + cby * cby) x,)|;HXm  
   cos_acb = mo_jj / (mo_ca * mo_cb) a B(_ZX'L  
   'ff_cos = cos_acb P_Rh& gkuK  
   If cos_acb >= 1 Then PX7@3Y  
   nn = 0 |^: A,%>  
   ElseIf cos_acb <= -1 Then Vu6$84>-,  
   nn = 3.14159265258979 -2Bkun4Pt  
   Else |ipL.<v7  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) pGS!Nn;K2  
   End If -nM=^i4)  
   'ff_angle = nn :xqhPr]e  
   ff_angle = nn * 180 / 3.14159265258979 ~MuD`a7#G  
End Function

'判断点在区域内函数 G)<NzZo  
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 G3Z>,"w;=
 
Dim aob, boc, cod, doa, sum As Single ;^fGQ]`4  
  If ppx = p1x And ppy = p1y Then ..Q$q2.  
     point_in = True qeM`z  
     Exit Function K'/,VALp  
  End If c)L1@qdZ  
  If ppx = p2x And ppy = p2y Then ZeB"k)FI>  
     point_in = True Dm^Bk?#(  
     Exit Function E;I'b:U`  
  End If yaDK_fk  
   If ppx = p3x And ppy = p3y Then ,}8|[)"  
     point_in = True Hj\iI p  
     Exit Function 9YMD[H\}V  
  End If /"Z6\T9  
     oSAO0h>0N  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) -XuRQ_)nG  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) [m*E[0Hu  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) @^O+ulLJ,]  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) j@ehcK9|  
    sum = aob + boc + cod + doa h vC gd^M  
    If 360.01 > sum And sum > 359.99 Then W{)RJ1  
       point_in = True U3oMY{{EJ  
    Else 3zr95$Mt  
       point_in = False vJ&g3ky  
    End If |(evDS5  
End Function

'得到点半径,得到交点坐标函数 >QA;02  
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() $XZC8L#  
    '求得中心点坐标 *vqr+jr9  
Dim tt As String $~h\`vF&  
Dim rt(3) As Single llK7~uOC  
    '判断是否平行 ab!Cu8~v  
   acx = p3x - p1x SQSPdR+  
   acy = p3y - p1y GN=ugP 9  
   bdx = p4x - p2x mne?r3d  
   bdy = p4y - p2y E3~Wyfd7  
   If acx * bdy = acy * bdx Then 1SwKd*aRR?  
      rt(0) = 0 Zr#\>h'c  
      Exit Function UG,<\k&  
   Else @
5,Xr`]  
      '判断斜率存在否 R2Y.s^  
      If p1x = p3x And p2x <> p4x Then vMHJgpd&j  
         tt = "ac_n_bd_y" {;2Gl$\r  
      ElseIf p1x <> p3x And p2x = p4x Then QIWfGVc-  
         tt = "ac_y_bd_n" 4UISuYg'  
      ElseIf p1x <> p3x And p2x <> p4x Then N,0&xg3  
         tt = "ac_y_bd_y" |ZmWhkOX  
      End If 1:j[p=Q&  
    Select Case tt nvOJY6)$V  
         Case "ac_n_bd_y" '<!T'l:R:/  
            'bd线段方程 Oe_*(q&  
            k_bd = bdy / bdx ~6!TMVr  
            b_bd = p2y - k_bd * p2x #[ TOe  
            p_x = p1x 8w\ZY>d  
            p_y = k_bd * p_x + b_bd \-nbV#{  
         Case "ac_y_bd_n" 6^#@y|.  
            'ac线段方程 g?1! /+  
            k_ac = acy / acx ?Mj@;O9>'  
            b_ac = p1y - k_ac * p1x Pq<]`9/w^w  
            p_x = p2x lG/h[  
            p_y = k_ac * p_x + b_ac KwxO%/-}S  
        Case "ac_y_bd_y" 6 66f
;h  
           'ac，bd线段都要求 vNIQ1x5Za  
           k_ac = acy / acx gQ;1SY!  
           b_ac = p1y - k_ac * p1x 5LVzT1j|  
           k_bd = bdy / bdx wxW\L!@  
           b_bd = p2y - k_bd * p2x {[Z}<#n)  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ;cfmMt!QWJ  
           p_y = k_ac * p_x + b_ac W*jwf@ 0  
        End Select UR'P,  
      rt(1) = p_x )|Md"r_B  
      rt(2) = p_y >oasA2S  
     +-d)/h.7  
'计算最大半径 @@~Ql  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) kW.it5Z#  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 4PDxmH]y  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ` Clh;  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 79G& 0 P\  
Dim bb(5) As Single 3 6-Sw  
  bb(1) = rr1 w^N3Ma  
  bb(2) = rr2 sUTfY|<7|  
  bb(3) = rr3 "&{sE RYY  
  bb(4) = rr4 Kq4b`cn{_  
  nb = rr1 )4CF*>*6V  
For i = 1 To 4 si,W.9rU  
    If nb <= bb(i) Then \`N<0COP  
       nb = bb(i) _7P#?:h  
    End If kHx6]<  
Next i ,o68xfdZVW  
    rt(0) = Sqr(nb) V0/O T~gS8  
    rr = rt() CTh!|mG  
  End If u~\I  
         9f7T.}HM  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  3I):W9$Qp  

mA2L~=v#  
有热压工艺方面的人才或者资料分享下； n4%ZR~9WH  
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 ~>-MVp  

高手真多！

楼主威武霸气.