[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_-n*k!  
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关键点说几个： d/v{I  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） blpX_N  
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 P%8 Gaa=  
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 )iNMjg  

以下是几个重要的函数： UOJx-o!c?  
1.判断点在区域中函数 IDQ@h`"B  
2.计算夹角函数 $sTbFY  
3.转置函数 ;PCnEs  
4.得到区域中心点，及区域半径函数 JR8 b[Oj.S  
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） "1FPe63\*O  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 #?\$*@O  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single BgRfy2:  
   cax = x2 - x1 xP#vAR  
   cay = y2 - y1 )9I>y2WU~  
   cbx = x2 - x3 UF0W%Z  
   cby = y2 - y3 'n4Ro|kA  
   mo_jj = cax * cbx + cay * cby nr7#}pzo  
   mo_ca = Sqr(cax * cax + cay * cay) ]L+YnZ?6  
   mo_cb = Sqr(cbx * cbx + cby * cby) 3*)<Y}Tc  
   cos_acb = mo_jj / (mo_ca * mo_cb) #hG0{_d7  
   'ff_cos = cos_acb Uc%n{ a-a  
   If cos_acb >= 1 Then  ?QxI2J  
   nn = 0 -AnQZy  
   ElseIf cos_acb <= -1 Then 4wYD-MB  
   nn = 3.14159265258979 8=QOp[w

 
   Else Ne<={u%  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1)
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   End If \d"JYym  
   'ff_angle = nn Y-!~x0-H  
   ff_angle = nn * 180 / 3.14159265258979 :btb|^C  
End Function

'判断点在区域内函数 Dzd[<Qln  
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 xgDd5`W  
Dim aob, boc, cod, doa, sum As Single L& =a(  
  If ppx = p1x And ppy = p1y Then (~>uFH  
     point_in = True ba5,?FVI~  
     Exit Function (=A61]yB  
  End If .8o?`  
  If ppx = p2x And ppy = p2y Then A]0A
,A0  
     point_in = True 9NF2a)&~  
     Exit Function F/pq9  
  End If ')R+Z/hG.  
   If ppx = p3x And ppy = p3y Then Cws;6i*=@  
     point_in = True L hp  
     Exit Function uu7 ?,WT  
  End If 8^IV`P~2M  
     q+iG:B/Z  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) k1lo{jw`  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 7gWT[  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) bG0 |+k3O  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) sNaLz  
    sum = aob + boc + cod + doa /esdtH$=  
    If 360.01 > sum And sum > 359.99 Then m:}PVJ-"  
       point_in = True FOPfob[  
    Else 8F>u6Y[P  
       point_in = False VSx9aVPkC  
    End If is~"yE7  
End Function

'得到点半径,得到交点坐标函数 $e~MKLd  
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() uTShz3  
    '求得中心点坐标 _
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Dim tt As String ,.kJF4s&  
Dim rt(3) As Single eA{nwtN  
    '判断是否平行 mjQZ"h0  
   acx = p3x - p1x ) $`}~  
   acy = p3y - p1y z*a-=w0  
   bdx = p4x - p2x vp32}zeD  
   bdy = p4y - p2y /!#A'#Z  
   If acx * bdy = acy * bdx Then ~'V&[]nh8  
      rt(0) = 0 T_)g/,5>  
      Exit Function 3F?7oMNIh  
   Else YdZ9##IU3  
      '判断斜率存在否 )[S#:PP  
      If p1x = p3x And p2x <> p4x Then tk)JE^'  
         tt = "ac_n_bd_y" KuRJo]  
      ElseIf p1x <> p3x And p2x = p4x Then ,i jB3J  
         tt = "ac_y_bd_n" &SG5f[  
      ElseIf p1x <> p3x And p2x <> p4x Then 4#Xz-5v  
         tt = "ac_y_bd_y" ^w!1QH0:/  
      End If 7lx" X0w*m  
    Select Case tt gSa!zQN6  
         Case "ac_n_bd_y" A`--*$8\  
            'bd线段方程 w%?Zb[!&  
            k_bd = bdy / bdx
V3% >TNp  
            b_bd = p2y - k_bd * p2x |KR8=-!7  
            p_x = p1x GlHP`&;UH  
            p_y = k_bd * p_x + b_bd X"jL  
         Case "ac_y_bd_n" 0HO'%'Ga*  
            'ac线段方程 x8xz33  
            k_ac = acy / acx +7Uv|LZ~@  
            b_ac = p1y - k_ac * p1x fN1b+d~*6  
            p_x = p2x !kG|BJ$j  
            p_y = k_ac * p_x + b_ac J(G-c5&=  
        Case "ac_y_bd_y" n$lVmQ6  
           'ac，bd线段都要求 7KHQ0  
           k_ac = acy / acx _dY5qW1p  
           b_ac = p1y - k_ac * p1x MQQQaD:v  
           k_bd = bdy / bdx nC%<BatQ  
           b_bd = p2y - k_bd * p2x VKtlAfXy~  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) .kU}
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           p_y = k_ac * p_x + b_ac C hQ] d  
        End Select ? 'qyI^m@  
      rt(1) = p_x W}y)vrL  
      rt(2) = p_y No8-Hm  
     .VR~[aD  
'计算最大半径 B^!-%_q  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ^AShy`o^X  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) `g_r<EY8/  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) m2H?VY.^K  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) id588
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Dim bb(5) As Single G!`PP  
  bb(1) = rr1 76o3Sge:  
  bb(2) = rr2 !7f,gvk  
  bb(3) = rr3 ;[79Ewd#$  
  bb(4) = rr4 [7Q%c!e$*  
  nb = rr1 3GNcnb  
For i = 1 To 4 yM}3u4FG  
    If nb <= bb(i) Then P:_bF>r ?  
       nb = bb(i) hH9~.4+*`g  
    End If ,J'_Vi  
Next i obGhO  
    rt(0) = Sqr(nb) 1 +s;a]-C  
    rr = rt() Go!{@xx>  
  End If '7pzw>E=:  
         c5|sda{  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ;@Fb>lBhX  

V2`Ud[  
有热压工艺方面的人才或者资料分享下； 09anQHa  
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 |,5|ZpgL  

高手真多！

楼主威武霸气.