[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： mYzcVhV  
nd;O(s;  

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图片:2.jpg

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关键点说几个： )%BT*)x  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） `BpCRKTG  
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 8TI#7  
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 TG?fUD V  

以下是几个重要的函数： hl}dgp((  
1.判断点在区域中函数 L^&do98  
2.计算夹角函数 h|)2'07  
3.转置函数 >|(WS.n3C  
4.得到区域中心点，及区域半径函数 )|Jr|8  
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） ,~iFEaV+  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 H#_}^cGPR=  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single O'Vh{JHf  
   cax = x2 - x1 P~;<o!f  
   cay = y2 - y1 ~rp.jd 0l  
   cbx = x2 - x3 N <ja6Ac  
   cby = y2 - y3 nsy!p5o  
   mo_jj = cax * cbx + cay * cby Tm0?[[3hC  
   mo_ca = Sqr(cax * cax + cay * cay) [Q7`RB  
   mo_cb = Sqr(cbx * cbx + cby * cby) TZ)(ZKX*R  
   cos_acb = mo_jj / (mo_ca * mo_cb) jD$;q7fB  
   'ff_cos = cos_acb V>DXV-%&C  
   If cos_acb >= 1 Then PsacXZNs\N  
   nn = 0 "bLP3  
   ElseIf cos_acb <= -1 Then "~B~{ _<j  
   nn = 3.14159265258979 bwv/{3G,Ys  
   Else W5M ]  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) \nn56o@eN  
   End If "87O4 #$  
   'ff_angle = nn 8.6no  
   ff_angle = nn * 180 / 3.14159265258979 EG8%~k+R  
End Function

'判断点在区域内函数 ~GsH8yA_P  
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 LbLbJ{68  
Dim aob, boc, cod, doa, sum As Single /@xr[=L  
  If ppx = p1x And ppy = p1y Then lyMJW}T+>  
     point_in = True Off: ~  
     Exit Function Qr^Z~$i t  
  End If Iqe=#hUFe!  
  If ppx = p2x And ppy = p2y Then VuYWb)@  
     point_in = True U)IsTk~}O  
     Exit Function A,-[/Z K/  
  End If 8Iqk%n~(  
   If ppx = p3x And ppy = p3y Then _"FbjQ"  
     point_in = True n]kQ
tjJ  
     Exit Function q329z>  
  End If |1\dCE03}  
     %Hh &u .  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 0e7O#-  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) K{
`2jK#  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Huug_E+  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ~]m@k'n  
    sum = aob + boc + cod + doa ?trt4Tbe/  
    If 360.01 > sum And sum > 359.99 Then Y'+F0IZ+  
       point_in = True <Bob#Tf ~  
    Else N`L' 4v)  
       point_in = False wUZ(Tin  
    End If  CU7iva  
End Function

'得到点半径,得到交点坐标函数 :a^,Ei-&  
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() "8C(_z+]K`  
    '求得中心点坐标 6{FS/+  
Dim tt As String ADwwiq#E  
Dim rt(3) As Single `)gkkZ$)j  
    '判断是否平行 '8kL1  
   acx = p3x - p1x !MG>z\:  
   acy = p3y - p1y m%[
2x#  
   bdx = p4x - p2x #/ gme  
   bdy = p4y - p2y Vms7 Jay  
   If acx * bdy = acy * bdx Then _,-M8=dL%*  
      rt(0) = 0 xVwi }jtG|  
      Exit Function dA MilTo  
   Else [b)K@Ha  
      '判断斜率存在否 VHXR)}  
      If p1x = p3x And p2x <> p4x Then "351s3ff  
         tt = "ac_n_bd_y" XH Zu>[  
      ElseIf p1x <> p3x And p2x = p4x Then A?{aUQB~|  
         tt = "ac_y_bd_n" fAA@ziKg  
      ElseIf p1x <> p3x And p2x <> p4x Then W
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         tt = "ac_y_bd_y"
:O@,Z_"  
      End If
uzn))/"  
    Select Case tt &V,-W0T_  
         Case "ac_n_bd_y" BOl
$UJ|K  
            'bd线段方程 vGLb2Q  
            k_bd = bdy / bdx yKk,);  
            b_bd = p2y - k_bd * p2x t BXsWY{  
            p_x = p1x "=5vgg3  
            p_y = k_bd * p_x + b_bd  "lnk  
         Case "ac_y_bd_n" P A+e= %  
            'ac线段方程 x@bl]Z(ne/  
            k_ac = acy / acx A"T. nqB^y  
            b_ac = p1y - k_ac * p1x bU +eJU_%  
            p_x = p2x '/"M02a  
            p_y = k_ac * p_x + b_ac d-S'y-V?d  
        Case "ac_y_bd_y" :Tl6:=B  
           'ac，bd线段都要求 gu%'M:Xe  
           k_ac = acy / acx 8@C|exAD`  
           b_ac = p1y - k_ac * p1x 2W-NCE%K)T  
           k_bd = bdy / bdx J$ih|nP  
           b_bd = p2y - k_bd * p2x L5N{ie_  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) bJMcI8`  
           p_y = k_ac * p_x + b_ac Q9'p3"yoE  
        End Select YNQ6(HA  
      rt(1) = p_x y.]]V"'2  
      rt(2) = p_y l?<z1Acd&  
     N)I T?  
'计算最大半径 L"^366M!  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ny?m&;^r:  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 7|eSvC  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) B+H9c~3$  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) /W
gWe  
Dim bb(5) As Single JGNxJ S<]  
  bb(1) = rr1 ~E|V{z%  
  bb(2) = rr2  YaZ"&i  
  bb(3) = rr3 u4^"E+y^S  
  bb(4) = rr4 ZJ}LnPr  
  nb = rr1 &``oZvuB  
For i = 1 To 4 A-`J!xj#/  
    If nb <= bb(i) Then /Gv$1t^a  
       nb = bb(i) "^e?E:( 3  
    End If rxk{Li<9  
Next i A =#-u&l  
    rt(0) = Sqr(nb) h9smviU7u  
    rr = rt() Lj1 @yokB  
  End If 1E_Ui1[  
         Qi]Z)v{^  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  +[
9"M+4-  

~-i
?=  
有热压工艺方面的人才或者资料分享下； ~C x2Q4E  
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 Ma#-'J  

高手真多！

楼主威武霸气.