[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： &3 Ki  
1(RRjT9  
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关键点说几个： Cl3L)  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） e/#6qCE  
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^S!GG'gb  
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 kD7'BP/#  

以下是几个重要的函数： BPm")DMo  
1.判断点在区域中函数 p=#/H,2  
2.计算夹角函数 j}`ku9S~  
3.转置函数 WFhppi   
4.得到区域中心点，及区域半径函数 :ln?PT  
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） Ts
3!mjn  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Sa0IRC<LV  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single SGba6b31  
   cax = x2 - x1 p#-=mXE/2  
   cay = y2 - y1 S3$C#mHX  
   cbx = x2 - x3 a=x&sz\x  
   cby = y2 - y3 rdtzz#7  
   mo_jj = cax * cbx + cay * cby CfD4m,6  
   mo_ca = Sqr(cax * cax + cay * cay) GoH.0eQ^  
   mo_cb = Sqr(cbx * cbx + cby * cby) ]YfG`0e
K<  
   cos_acb = mo_jj / (mo_ca * mo_cb) _qpIdQBo  
   'ff_cos = cos_acb j9GKz1
 
   If cos_acb >= 1 Then .*xO/pn  
   nn = 0 7GG`9!l]D  
   ElseIf cos_acb <= -1 Then 8 nqF i  
   nn = 3.14159265258979 #3eI4KJ4+l  
   Else mG\9Qkom|  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) +JY8"a97>  
   End If W$&*i1<a+  
   'ff_angle = nn R
>1oF]w  
   ff_angle = nn * 180 / 3.14159265258979 6c27X/'Z  
End Function

'判断点在区域内函数 p]?eIovi  
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 'MB+cz+v  
Dim aob, boc, cod, doa, sum As Single <
{hB&4oL  
  If ppx = p1x And ppy = p1y Then (2"4PU8  
     point_in = True H4{7,n  
     Exit Function GukwN]*OY  
  End If B}*\ pdJ  
  If ppx = p2x And ppy = p2y Then z|Xt'?9&n  
     point_in = True N1'Yo:_A  
     Exit Function I")Ud?v0)  
  End If QwF.c28[  
   If ppx = p3x And ppy = p3y Then -e
m3 #V  
     point_in = True b j<T`M!  
     Exit Function 7~ZG"^k  
  End If i.
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     ;- Vs|X  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) cXN0D\%`  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 'd;aAG  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) wN6sica|  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 9ao?\]&t  
    sum = aob + boc + cod + doa ~x_(v,NW  
    If 360.01 > sum And sum > 359.99 Then E5c)\ D  
       point_in = True }g%&}`%'  
    Else 9o6qN1A0g  
       point_in = False XRyeEwA;pp  
    End If KBI1t$  
End Function

'得到点半径,得到交点坐标函数 BCd0X. m(  
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() CPP9=CoR37  
    '求得中心点坐标 |Q?$n3-f"  
Dim tt As String mt e3k=17  
Dim rt(3) As Single 8-b~p  
    '判断是否平行 F%{z EANm  
   acx = p3x - p1x hKsx7`[  
   acy = p3y - p1y ]Rp<64I o  
   bdx = p4x - p2x 'Nx"_jQ  
   bdy = p4y - p2y ?q5HAIZ`  
   If acx * bdy = acy * bdx Then SxC(:k2b;  
      rt(0) = 0 Kj6+$l  
      Exit Function TFhYu  
   Else AJRiwP|H+  
      '判断斜率存在否 y%YP  
      If p1x = p3x And p2x <> p4x Then G~Y#l@8M+  
         tt = "ac_n_bd_y" X&K,,C  
      ElseIf p1x <> p3x And p2x = p4x Then O&">%aU1I  
         tt = "ac_y_bd_n" :X*uE^bH  
      ElseIf p1x <> p3x And p2x <> p4x Then _qQo}|/q  
         tt = "ac_y_bd_y" bs?4|#[K  
      End If `0{qfms  
    Select Case tt {>brue*)  
         Case "ac_n_bd_y" W`n_m&Y\  
            'bd线段方程 J=n^&y  
            k_bd = bdy / bdx T16B2|C"Y  
            b_bd = p2y - k_bd * p2x qEkhgJqk  
            p_x = p1x #e9XU:9@g  
            p_y = k_bd * p_x + b_bd `WQpGBS_z_  
         Case "ac_y_bd_n" BMhuM~?(  
            'ac线段方程 ;:
Kc{B.s  
            k_ac = acy / acx \}Pr!tk!  
            b_ac = p1y - k_ac * p1x ,l\D@<F  
            p_x = p2x z_z'3d.r7  
            p_y = k_ac * p_x + b_ac Z \-  
        Case "ac_y_bd_y" 2Ju,P_<dt  
           'ac，bd线段都要求 #P1;*m  
           k_ac = acy / acx (fO~nN{F  
           b_ac = p1y - k_ac * p1x 8}^ym^H|j  
           k_bd = bdy / bdx wKz*)C  
           b_bd = p2y - k_bd * p2x H{Na'_sL  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) !|Y&h0e  
           p_y = k_ac * p_x + b_ac 81wmKqDEs  
        End Select IRI<no  
      rt(1) = p_x +OUM 4y  
      rt(2) = p_y WxF@'kdn*,  
     a+\s0Qo<  
'计算最大半径 #8bI4J{dE  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) P~"""3de4  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) lx~mn~;x  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) + V-&?E(  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) q.lh  
Dim bb(5) As Single _LZ 442  
  bb(1) = rr1 ]JI A\|b6  
  bb(2) = rr2 jbTyM"Y  
  bb(3) = rr3 F=kiYa}  
  bb(4) = rr4 `P9%[8`C 9  
  nb = rr1 2f-Or/v  
For i = 1 To 4 v8A{q  
    If nb <= bb(i) Then #Cz:l|\ i  
       nb = bb(i) {|@N~c+  
    End If u+8?'ZT,  
Next i Cd7d-'EQn  
    rt(0) = Sqr(nb) oga0h'  
    rr = rt() +;;pM[U  
  End If GJuU?h#:/{  
         PFeK;`[  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  wy$9QN  

Pw'3ya8  
有热压工艺方面的人才或者资料分享下； `=Hh5;ep  
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 O=St}B\!m  

高手真多！

楼主威武霸气.