[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： NUB3L  
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关键点说几个： Oh9jr"Gm=  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） +*OY%;dQ7@  
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 XO |U4#ya  
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 E&G_7->  

以下是几个重要的函数： Q!DQ!;Br6  
1.判断点在区域中函数 f#xqu+)Z  
2.计算夹角函数 :z=/z!5:j  
3.转置函数 G7lC'~}  
4.得到区域中心点，及区域半径函数 ldJeja~Xl  
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） A/NwM1z[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 :SSlUl4sU$  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single v~73  
   cax = x2 - x1 LQYT/  
   cay = y2 - y1 Fs:l"5~>1  
   cbx = x2 - x3 RB'12^[  
   cby = y2 - y3 Py 8o8*H  
   mo_jj = cax * cbx + cay * cby di6A.N5A  
   mo_ca = Sqr(cax * cax + cay * cay) Z2B59,I  
   mo_cb = Sqr(cbx * cbx + cby * cby) <_""4  
   cos_acb = mo_jj / (mo_ca * mo_cb) B\bIMjXV  
   'ff_cos = cos_acb D@H'8C\  
   If cos_acb >= 1 Then rS9*_-NH  
   nn = 0 1p,G8v+B  
   ElseIf cos_acb <= -1 Then R{.wAH(  
   nn = 3.14159265258979 avls[Bq  
   Else <R~(6krJwZ  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) $Vp&Vc8  
   End If Ks09F}  
   'ff_angle = nn zqYfgV  
   ff_angle = nn * 180 / 3.14159265258979 ?|^1-5l3  
End Function

'判断点在区域内函数 7 pg8kq@  
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 9>le-}~  
Dim aob, boc, cod, doa, sum As Single 8%7H F:  
  If ppx = p1x And ppy = p1y Then ^f!d8 V  
     point_in = True F5L/7j<}  
     Exit Function D'O[0?N"g  
  End If V0JoUyZ  
  If ppx = p2x And ppy = p2y Then \{?v|%n=/i  
     point_in = True 0e8)*2S  
     Exit Function Q8Usyc'3  
  End If 21cB_"  
   If ppx = p3x And ppy = p3y Then Jb$PlOQ  
     point_in = True @c$mc  
     Exit Function zG
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  End If 1aYO:ZPy  
     ;?inf`t  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 1Sz5&jz  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) !9iVe7V  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) u[2R>=  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 7F?^gMi  
    sum = aob + boc + cod + doa RW
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    If 360.01 > sum And sum > 359.99 Then X+iA"B  
       point_in = True #D//oL"u]  
    Else s'\"%~nF<  
       point_in = False 94nvh:n  
    End If cx_"{`+e  
End Function

'得到点半径,得到交点坐标函数 *+p'CfsSka  
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() z8z U3?  
    '求得中心点坐标 7Oxvq^[  
Dim tt As String -ZihEyG?V  
Dim rt(3) As Single ,PN>,hFL  
    '判断是否平行 o]Vx6  
   acx = p3x - p1x Y,E:?  
   acy = p3y - p1y [U3z*m>e;  
   bdx = p4x - p2x I8^z\ef&  
   bdy = p4y - p2y u> >t"w  
   If acx * bdy = acy * bdx Then $8it&/JP,  
      rt(0) = 0 J_P2%b=C  
      Exit Function -QS_bQG%  
   Else 6oUT+^z#  
      '判断斜率存在否 bJ. ((1$  
      If p1x = p3x And p2x <> p4x Then /.WD'*H  
         tt = "ac_n_bd_y" )_bXKYUX*0  
      ElseIf p1x <> p3x And p2x = p4x Then TS3 00F  
         tt = "ac_y_bd_n" <j,7Z>Rk\x  
      ElseIf p1x <> p3x And p2x <> p4x Then %8{' XJ!  
         tt = "ac_y_bd_y" \D}/tz5~B  
      End If lBh {8a|2W  
    Select Case tt cVulJ6  
         Case "ac_n_bd_y" m5d;lrk@&/  
            'bd线段方程 SKG_P)TnO  
            k_bd = bdy / bdx .Uih|h  
            b_bd = p2y - k_bd * p2x Wdy2;a<\{  
            p_x = p1x j<L!ONvJ1  
            p_y = k_bd * p_x + b_bd ',
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         Case "ac_y_bd_n" f$WO{J  
            'ac线段方程 * 5P/&*c|  
            k_ac = acy / acx qVM]$V#e  
            b_ac = p1y - k_ac * p1x yobi$mnsy!  
            p_x = p2x XTeU2I  
            p_y = k_ac * p_x + b_ac +U6! bu>C  
        Case "ac_y_bd_y" >J8?n,*  
           'ac，bd线段都要求 `C!Pe84(  
           k_ac = acy / acx 6'wP?=  
           b_ac = p1y - k_ac * p1x *2@q=R-1  
           k_bd = bdy / bdx T\cdtjk  
           b_bd = p2y - k_bd * p2x 9U;) [R Mb  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) cIgFS
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           p_y = k_ac * p_x + b_ac HDy[/7"  
        End Select s@3!G+ -}  
      rt(1) = p_x l_}c[bAUu  
      rt(2) = p_y TS1k'<c?  
     /D~ ,X48+  
'计算最大半径 p(x[zn+%Y  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) pCg0xbc`  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) E|^a7-}|  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) e94csTh=  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Y+G4:  
Dim bb(5) As Single 2+?M(=4  
  bb(1) = rr1 xSLN  
  bb(2) = rr2 \{~x<<qFd  
  bb(3) = rr3 i.byHz?/  
  bb(4) = rr4 WnIh( 0  
  nb = rr1 ]
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For i = 1 To 4 cxmr|-^  
    If nb <= bb(i) Then %l5J   
       nb = bb(i) 52%.^/  
    End If "kN5AeRg  
Next i %OzxR9  
    rt(0) = Sqr(nb) K):)bL(B  
    rr = rt() +$<m;@mZ  
  End If a{)"KAP  
         ^Nc\D7( l  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  4R}2H>VV%  

&(irri_  
有热压工艺方面的人才或者资料分享下； j
oYj`K  
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 = q;ACW,z  

高手真多！

楼主威武霸气.