[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： |[X-i["y  
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关键点说几个： WT jy"p*  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） PG@6*E  
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 3c[]P2Bh  
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 s=hao4v7z  

以下是几个重要的函数：
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1.判断点在区域中函数 sE!$3|Q  
2.计算夹角函数 a LJ d1Q
 
3.转置函数 &{gy{npQ  
4.得到区域中心点，及区域半径函数 F"0=r  
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） \{;3'<  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 IqqBUH  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single CTJwZY7  
   cax = x2 - x1 Xo3@-D_c!c  
   cay = y2 - y1 rDv`E^\  
   cbx = x2 - x3 >DR$}{IV  
   cby = y2 - y3 aUq2$lw1  
   mo_jj = cax * cbx + cay * cby +P<#6<gR  
   mo_ca = Sqr(cax * cax + cay * cay) $'3'[Nr(;t  
   mo_cb = Sqr(cbx * cbx + cby * cby) }z5u^_-m  
   cos_acb = mo_jj / (mo_ca * mo_cb) =s&ycc;-5}  
   'ff_cos = cos_acb C4)m4r%  
   If cos_acb >= 1 Then +h8`8k'}-2  
   nn = 0 jmF)iDvjuZ  
   ElseIf cos_acb <= -1 Then #wp~lW9!s9  
   nn = 3.14159265258979 Rp0^Gwa  
   Else =3EjD;2  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1)  rp=Y }  
   End If v {)8QF]  
   'ff_angle = nn )j. .)o  
   ff_angle = nn * 180 / 3.14159265258979 Bo8NY!  
End Function

'判断点在区域内函数 f o idneus  
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 v1p^="IHI  
Dim aob, boc, cod, doa, sum As Single 0cq<!{d  
  If ppx = p1x And ppy = p1y Then *t_Q5&3L+U  
     point_in = True >4J(\'}m|  
     Exit Function 85lcd4&~  
  End If  F |aLF{  
  If ppx = p2x And ppy = p2y Then kW=!RX[&  
     point_in = True .-)kIFMi  
     Exit Function /7x1Z*Hg  
  End If Hyi'z
1  
   If ppx = p3x And ppy = p3y Then +'wO:E1( w  
     point_in = True sgRWjrc/  
     Exit Function h4Xz"i{z  
  End If 1u"#rC>7.4  
     ~_ u3_d.  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) jZ''0Lclpc  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) !|8"}ZF  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) IyAD>Q^  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) Mbn;~tY>  
    sum = aob + boc + cod + doa M0$E_*  
    If 360.01 > sum And sum > 359.99 Then U$;UW3-  
       point_in = True t%StBq(q  
    Else dWdD^>8Ef  
       point_in = False rU6A^p\,  
    End If !+]Kx
B  
End Function

'得到点半径,得到交点坐标函数 UuC-R)  
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() BWNI|pq)v  
    '求得中心点坐标 3W{!\  
Dim tt As String F)v  
Dim rt(3) As Single UmY{2 nzY  
    '判断是否平行 ;#9ioGx  
   acx = p3x - p1x 1}Y3|QxF  
   acy = p3y - p1y p$uPj*  
   bdx = p4x - p2x }kP<zvAaw  
   bdy = p4y - p2y 3_`)QYU'  
   If acx * bdy = acy * bdx Then XUnw*3tPJ  
      rt(0) = 0 J5';Hb)  
      Exit Function U`5/tNx  
   Else i<):%[Q)>  
      '判断斜率存在否 Io[NN aF|  
      If p1x = p3x And p2x <> p4x Then g> ~+M  
         tt = "ac_n_bd_y" r=~K#:66  
      ElseIf p1x <> p3x And p2x = p4x Then kdp^{zW}  
         tt = "ac_y_bd_n" k1ja ([Q  
      ElseIf p1x <> p3x And p2x <> p4x Then tY: Nq*@  
         tt = "ac_y_bd_y" -m@PqJF^  
      End If o\]U;#YD  
    Select Case tt `'&mO9,<-  
         Case "ac_n_bd_y" - Ry+WS=  
            'bd线段方程 s;Gg  
            k_bd = bdy / bdx (\!?>T[En  
            b_bd = p2y - k_bd * p2x u0A$}r$L  
            p_x = p1x esj6=Gh  
            p_y = k_bd * p_x + b_bd 
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         Case "ac_y_bd_n" Y}:4y$<  
            'ac线段方程 r7L.W
  
            k_ac = acy / acx cpALs1j:  
            b_ac = p1y - k_ac * p1x 3W]gn8  
            p_x = p2x 5[4nFa}R:5  
            p_y = k_ac * p_x + b_ac 6q>}M  
        Case "ac_y_bd_y" j>B*8*Ss  
           'ac，bd线段都要求 1U/RMN3`  
           k_ac = acy / acx j/fniyJ)  
           b_ac = p1y - k_ac * p1x kkWv#,qwU  
           k_bd = bdy / bdx O ;[Mi  
           b_bd = p2y - k_bd * p2x "qd|!:bE  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) |cgjn*a?M  
           p_y = k_ac * p_x + b_ac K&Bbjb_|  
        End Select Y;%LwDC  
      rt(1) = p_x (CY D]n  
      rt(2) = p_y 5bAdF'~  
     >TY;l3ew  
'计算最大半径 MIn_?r  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) mC$y*G  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) DBL@Mp[<  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) |w54!f6w_  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ~J&-~<%P}  
Dim bb(5) As Single p6K
~b  
  bb(1) = rr1 &)gc{(4$  
  bb(2) = rr2 3Ovx)qKxd  
  bb(3) = rr3 nc\`y,>l8  
  bb(4) = rr4 I`H&b& .`  
  nb = rr1 CbC[aVA=  
For i = 1 To 4 2l+L96  
    If nb <= bb(i) Then BQ)>}YHk  
       nb = bb(i) AU}kIm_+  
    End If 2xflRks  
Next i [rWBVfm  
    rt(0) = Sqr(nb) )E*f30  
    rr = rt() }7(+#ISK6  
  End If !'p<Kh[i  
         t!*[nfR  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  O=7S=Rm4&  

/C Xg$%\  
有热压工艺方面的人才或者资料分享下； >~Zj  
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 jyW={%&  

高手真多！

楼主威武霸气.