[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： .xWaS8f  
yNowhh
 

描述:请输入描述

图片:2.jpg

`:*2TLxIk  

关键点说几个： P.C?/7$7Z+  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 1n[)({OQ  
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 mL
2
J  
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 rDhQ3iCqo  

以下是几个重要的函数： -^2p@^  
1.判断点在区域中函数 WoN},oT[i  
2.计算夹角函数 +]A,fmI.  
3.转置函数 \}v@!PQl  
4.得到区域中心点，及区域半径函数 {)lZfj}l  
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） ; F'IS/ttX  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 /y{:N  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single tj~r>SRb+  
   cax = x2 - x1 @9| jY1  
   cay = y2 - y1 ElUFne=  
   cbx = x2 - x3 5?SE?VC=t  
   cby = y2 - y3 ?V8Fgd  
   mo_jj = cax * cbx + cay * cby UX63
BA  
   mo_ca = Sqr(cax * cax + cay * cay) X^N6s"2  
   mo_cb = Sqr(cbx * cbx + cby * cby) 8c-ys-"#  
   cos_acb = mo_jj / (mo_ca * mo_cb) QOkt
IH  
   'ff_cos = cos_acb W9Azp8)p
]  
   If cos_acb >= 1 Then y EfAa6  
   nn = 0 9DhM 9VU  
   ElseIf cos_acb <= -1 Then Hq 5#.rZ#  
   nn = 3.14159265258979 d9:I.SA)E  
   Else #~nXAs]Q  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Ve%ua]qA  
   End If ~Ze!F"  
   'ff_angle = nn yZ,pH1  
   ff_angle = nn * 180 / 3.14159265258979 >8I~i:hn  
End Function

'判断点在区域内函数 DSRc4|L
 
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 W`
9{RZ
'  
Dim aob, boc, cod, doa, sum As Single C;HEvq7  
  If ppx = p1x And ppy = p1y Then k{;
?>=FH!  
     point_in = True *Ci&1Mu^Z  
     Exit Function kR %,:   
  End If 2QbKh)  
  If ppx = p2x And ppy = p2y Then 9ns( F:  
     point_in = True TxK v!-1  
     Exit Function qzxWv5UH  
  End If )uHat#  
   If ppx = p3x And ppy = p3y Then drjNK!XL@  
     point_in = True a. D cmy{  
     Exit Function @-S7)h>~  
  End If .jqil0#)Y"  
     W)r|9G8T  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) seK;TQ3/7  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) c!6v-2ykv  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) oQ]FyV
 
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) D.{vuftu  
    sum = aob + boc + cod + doa TDR|*Cs  
    If 360.01 > sum And sum > 359.99 Then w,j!%N  
       point_in = True N*Q*>q  
    Else >g!$H}\  
       point_in = False q[qX O5  
    End If 3Y)z{o>P  
End Function

'得到点半径,得到交点坐标函数 +7
6ao7d.  
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() 9s5s;ntz"  
    '求得中心点坐标 _X?_|!;J  
Dim tt As String J3aom,$o  
Dim rt(3) As Single 63\ CE_p  
    '判断是否平行 sSKD"  
   acx = p3x - p1x C3=0st$  
   acy = p3y - p1y 8SroA$^n  
   bdx = p4x - p2x ] rqx><!  
   bdy = p4y - p2y mm#UaEp  
   If acx * bdy = acy * bdx Then <^> nR3E  
      rt(0) = 0 s7}-j2riq  
      Exit Function (bI/s'?K  
   Else )Az0.}  
      '判断斜率存在否 8v/,<eARJ  
      If p1x = p3x And p2x <> p4x Then mnZfk  
         tt = "ac_n_bd_y" b
(HJ|  
      ElseIf p1x <> p3x And p2x = p4x Then y]R+/  
         tt = "ac_y_bd_n" e9'0CH<  
      ElseIf p1x <> p3x And p2x <> p4x Then t 4M-;y  
         tt = "ac_y_bd_y" a|y'-r90  
      End If tIV9Y=ckr0  
    Select Case tt _8PNMbv{  
         Case "ac_n_bd_y" % mPv1$FH  
            'bd线段方程 Y#9bM$x7  
            k_bd = bdy / bdx GK6~~ga=  
            b_bd = p2y - k_bd * p2x M7Xn=jc  
            p_x = p1x _ j'm2BAO  
            p_y = k_bd * p_x + b_bd D5Rp<PBq,  
         Case "ac_y_bd_n" 0
r$n  
            'ac线段方程 er BerbEEH  
            k_ac = acy / acx Zonn  
            b_ac = p1y - k_ac * p1x j7I?K :op=  
            p_x = p2x j)ln"u0R^B  
            p_y = k_ac * p_x + b_ac (8ct'Q;  
        Case "ac_y_bd_y" k&[6Ld0~56  
           'ac，bd线段都要求 0R
SzDgX  
           k_ac = acy / acx ]T5\LNyN  
           b_ac = p1y - k_ac * p1x 4k{xo~+%,  
           k_bd = bdy / bdx Z-}A"n
 
           b_bd = p2y - k_bd * p2x NuF?:L[  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ^u90N>Dvq  
           p_y = k_ac * p_x + b_ac yfqe6-8U  
        End Select \AI-x$5R*  
      rt(1) = p_x 
+>yh`Zb  
      rt(2) = p_y C %j%>X`  
     A^hafBa  
'计算最大半径 )iC@n8f7o  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) k=p[Mlic/  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) b ~]v'|5[  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 
D\J.6W  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) D8*6h)~  
Dim bb(5) As Single vqoK9  
  bb(1) = rr1 Z{ 9
Io/  
  bb(2) = rr2 mss.\  
  bb(3) = rr3 ON>l%Ae4G  
  bb(4) = rr4 p74Nd4U$s  
  nb = rr1 XCyb[(4  
For i = 1 To 4 k MV1$  
    If nb <= bb(i) Then  (t@!0_5  
       nb = bb(i) vaVV1  
    End If L|b[6[XTHL  
Next i hhU\$'0B-  
    rt(0) = Sqr(nb) !"hzGgOOX  
    rr = rt() yP` K [/  
  End If g#1Y4  
         ^)`e}}  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  \O,yWyU4  

4+p1`  
有热压工艺方面的人才或者资料分享下； nKEw$~F  
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 OJM2t`}_t  

高手真多！

楼主威武霸气.