[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： VNcxST15a  
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关键点说几个： Mbua!m(0  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 7)`U%}R  
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 J.r^"K\  
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 ]{Ytf'bG  

以下是几个重要的函数： ^]&uMkP
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1.判断点在区域中函数 7<<-\7`  
2.计算夹角函数 ETw7/S${  
3.转置函数 #E?TE  
4.得到区域中心点，及区域半径函数 )AxgKBW  
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） !\ IgTt,  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 \{Qd  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ,f4VV\  
   cax = x2 - x1 Rqi=AQ  
   cay = y2 - y1 t<)Cbple\  
   cbx = x2 - x3 7,MDFO{
n  
   cby = y2 - y3 Wchu-]  
   mo_jj = cax * cbx + cay * cby #H'j;=]:  
   mo_ca = Sqr(cax * cax + cay * cay) {t.5cX"[  
   mo_cb = Sqr(cbx * cbx + cby * cby) [Eeanl&x>  
   cos_acb = mo_jj / (mo_ca * mo_cb) vD=>AAvG  
   'ff_cos = cos_acb k$u\\`i]oC  
   If cos_acb >= 1 Then %h}Qf&U_  
   nn = 0 BB x359  
   ElseIf cos_acb <= -1 Then 3pxZk%  
   nn = 3.14159265258979 WrA!'I  
   Else ^#|Sl D]  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) b`%3>  
   End If m*Zq3j  
   'ff_angle = nn $+ z3  
   ff_angle = nn * 180 / 3.14159265258979 E,~|-\b}h  
End Function

'判断点在区域内函数 /|<Pn!}J  
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 I7@|{L1|FB  
Dim aob, boc, cod, doa, sum As Single ?z hw0  
  If ppx = p1x And ppy = p1y Then ?/M:  
     point_in = True 3V(]*\L  
     Exit Function *^ZJ&.  
  End If *~D|M  
  If ppx = p2x And ppy = p2y Then sf([8YUd  
     point_in = True &z;b
X-"E  
     Exit Function 2 c 2lK  
  End If *1H8 &  
   If ppx = p3x And ppy = p3y Then IP LKOT~  
     point_in = True WE{fu{x  
     Exit Function - w{`/  
  End If 0N|l1Sn  
     t@&U2JaL>W  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) R@X65o  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 8l1s]Kqr  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ->^Ex`  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) xU1_L*tu '  
    sum = aob + boc + cod + doa Silh[8  
    If 360.01 > sum And sum > 359.99 Then HUA{ P%  
       point_in = True "
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    Else 0P5s'2w  
       point_in = False `WUyffS/!  
    End If \,AE5hnO  
End Function

'得到点半径,得到交点坐标函数 S4_C8  
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() ,M.phRJ-`  
    '求得中心点坐标 "5!T-Z+F  
Dim tt As String VnYcqeCm  
Dim rt(3) As Single DFXHD,o  
    '判断是否平行 3;O4o]`  
   acx = p3x - p1x Q}: $F{  
   acy = p3y - p1y r) u@,P  
   bdx = p4x - p2x mDXG~*1  
   bdy = p4y - p2y >T#" Im-  
   If acx * bdy = acy * bdx Then M ZAz= )-  
      rt(0) = 0 `53S[8  
      Exit Function O**
~ Tj  
   Else Nz77" kC  
      '判断斜率存在否 (KLhF  
      If p1x = p3x And p2x <> p4x Then TE5J @I  
         tt = "ac_n_bd_y"
n *EGOS  
      ElseIf p1x <> p3x And p2x = p4x Then iG ,z3/~v  
         tt = "ac_y_bd_n" I/*^s  
      ElseIf p1x <> p3x And p2x <> p4x Then A+MG?k>yg  
         tt = "ac_y_bd_y" dBkM~"  
      End If WfXwI 'y  
    Select Case tt @__m>8wn  
         Case "ac_n_bd_y" kz/"5gX:  
            'bd线段方程 TVM19
)9  
            k_bd = bdy / bdx X<D fzd oI  
            b_bd = p2y - k_bd * p2x n
)j0h-  
            p_x = p1x 8B(=Y;w  
            p_y = k_bd * p_x + b_bd mKqXB\<  
         Case "ac_y_bd_n" aX2N Qq>s  
            'ac线段方程 O I0N(V  
            k_ac = acy / acx R/xT.EQ(N  
            b_ac = p1y - k_ac * p1x Uc,J+j0F  
            p_x = p2x zm{`+boH<  
            p_y = k_ac * p_x + b_ac D<`M<:nq  
        Case "ac_y_bd_y" 8(ot<3(D  
           'ac，bd线段都要求 m^~5Xr"  
           k_ac = acy / acx [4hi/60  
           b_ac = p1y - k_ac * p1x ~"\WV4}`v  
           k_bd = bdy / bdx ;Dbx5-t  
           b_bd = p2y - k_bd * p2x [1Aoj|  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) I)kc[/^j$  
           p_y = k_ac * p_x + b_ac [C/{ru&E  
        End Select '5b0 K1$"  
      rt(1) = p_x )}7X4g6X   
      rt(2) = p_y id9XwWV  
     \:g\?[   
'计算最大半径 W'~s  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) N4z[=b>  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 'd|!Hr<2  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) D~bx'Wr+  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ts% n tnvI  
Dim bb(5) As Single O+|ipw*B%  
  bb(1) = rr1 :7i x`C2  
  bb(2) = rr2  LJ;&02w@  
  bb(3) = rr3 *fs[]q'Q  
  bb(4) = rr4 _#1EbvO*l  
  nb = rr1 OFBEJacy  
For i = 1 To 4 !RPE-S  
    If nb <= bb(i) Then m[%':^vSr  
       nb = bb(i) 7n o6  
    End If &Z3%UOY  
Next i 4x<H=CJC  
    rt(0) = Sqr(nb) q{_f"  
    rr = rt() =''WA:,=h  
  End If T`MM<+^G  
         F3K<-JK+  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15) 
UO&$1rV  

* 30K}&T  
有热压工艺方面的人才或者资料分享下； p&x!m}!  
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 aQ$sn<-l  

高手真多！

楼主威武霸气.