[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： *7)S%r,?  
F+lm[4n  
S(@*3]!q  

关键点说几个： MYur3lj%_  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） t;Fbt("]:  
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 'iMHAP;N  
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 R^mu%dw)(%  

以下是几个重要的函数： ~;!i)[-  
1.判断点在区域中函数 t?3{s\z8+  
2.计算夹角函数 ~Q.8 U3"  
3.转置函数 FJ3:}r6 "  
4.得到区域中心点，及区域半径函数 -eSPoZ  
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） *SMoodFBS  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 E980yX
JR  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single eNl

F2M  
   cax = x2 - x1 iuH8
g  
   cay = y2 - y1 ~L4*b*W  
   cbx = x2 - x3 goBKr: &]w  
   cby = y2 - y3 I;kUG_c(4  
   mo_jj = cax * cbx + cay * cby t
aD T;t  
   mo_ca = Sqr(cax * cax + cay * cay) 4cVs(`g^  
   mo_cb = Sqr(cbx * cbx + cby * cby) n+RUPZ  
   cos_acb = mo_jj / (mo_ca * mo_cb) mBD!:V'  
   'ff_cos = cos_acb I/e2,  
   If cos_acb >= 1 Then ?Uy*6YS  
   nn = 0 8g2-8pa{  
   ElseIf cos_acb <= -1 Then C&d"#I  
   nn = 3.14159265258979 [M8qU$&?]  
   Else yEw"8u'  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) M~g~LhsF  
   End If y9re17{ X  
   'ff_angle = nn R>YMGUH~w  
   ff_angle = nn * 180 / 3.14159265258979 7}iewtdy,  
End Function

'判断点在区域内函数 ~jRk10T(B  
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 l)!woOt  
Dim aob, boc, cod, doa, sum As Single z
N8V~M;  
  If ppx = p1x And ppy = p1y Then {p lmFV  
     point_in = True luxKgcU  
     Exit Function >-tH&X^  
  End If U~B}vt  
  If ppx = p2x And ppy = p2y Then KiRt'  
     point_in = True WNlSve)]ie  
     Exit Function ph&H*Mc  
  End If &T{B~i3w8  
   If ppx = p3x And ppy = p3y Then L8-[:1
  
     point_in = True -z~ V  
     Exit Function  =R24h  
  End If m 
'H  
     id[>!fQ=Y  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) @vYN7  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) p7=^m>Z6  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) B| 0s4E  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) $>rfAs!  
    sum = aob + boc + cod + doa ka9v2tE\  
    If 360.01 > sum And sum > 359.99 Then 
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       point_in = True l<MCmKuYp  
    Else U%PMV?L{  
       point_in = False ?[4khQt  
    End If !
)*T  
End Function

'得到点半径,得到交点坐标函数 _itN.^  
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() hB<z]sl  
    '求得中心点坐标 z^GGJu%vjr  
Dim tt As String e$+? v2.  
Dim rt(3) As Single 8; N
}d)*O  
    '判断是否平行 c94PWPU  
   acx = p3x - p1x ::b;4QL  
   acy = p3y - p1y xupdjT%4  
   bdx = p4x - p2x @
5@{Es1u  
   bdy = p4y - p2y 7Sv5fLu2  
   If acx * bdy = acy * bdx Then x=r6vOj  
      rt(0) = 0 ?lna8]t  
      Exit Function !-o||rt  
   Else =,;3z/k%  
      '判断斜率存在否 9-<V%eNX  
      If p1x = p3x And p2x <> p4x Then qhGhUyNX  
         tt = "ac_n_bd_y" Xwq2;Bq  
      ElseIf p1x <> p3x And p2x = p4x Then Oes+na
'^  
         tt = "ac_y_bd_n" x,*t/nzR  
      ElseIf p1x <> p3x And p2x <> p4x Then SmEd'YD!J  
         tt = "ac_y_bd_y" WW/m /+  
      End If O6 J<Lqgh  
    Select Case tt NOr*+N\  
         Case "ac_n_bd_y" IHMyP~{  
            'bd线段方程 BTQC1;;N  
            k_bd = bdy / bdx WC&Ltw8  
            b_bd = p2y - k_bd * p2x c oz}VMp  
            p_x = p1x BPs &  
            p_y = k_bd * p_x + b_bd WD1$"}R
 
         Case "ac_y_bd_n" Y]Nab0R
&  
            'ac线段方程 @wZ_VE7B  
            k_ac = acy / acx '(:J|DN  
            b_ac = p1y - k_ac * p1x W n mRRq^  
            p_x = p2x @G{DOxE*  
            p_y = k_ac * p_x + b_ac P@![P Ij  
        Case "ac_y_bd_y" 7i8qB462  
           'ac，bd线段都要求 Q$5:P&  
           k_ac = acy / acx P9!]<so  
           b_ac = p1y - k_ac * p1x 4f~ZY]|nM  
           k_bd = bdy / bdx %),O9*[9  
           b_bd = p2y - k_bd * p2x laJ%fBWmbi  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) AlhiF\+ C  
           p_y = k_ac * p_x + b_ac wi >ta  
        End Select };sm8P
{M  
      rt(1) = p_x PiQs><FK8  
      rt(2) = p_y hfc!M2/w  
     c$z_Zi!g#  
'计算最大半径 VqU:`?#"a  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) IbQ~f+y&2  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) nxRrmR}F  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) &y?B&4|hM  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) #-,`4x$m|  
Dim bb(5) As Single 73`UTXvWU  
  bb(1) = rr1 kniMXeiu  
  bb(2) = rr2 p7tC~]r:L  
  bb(3) = rr3 eci\
Q,  
  bb(4) = rr4 5ZxBmQ  
  nb = rr1 jO.E#Ei}~  
For i = 1 To 4 r!uAofIi_  
    If nb <= bb(i) Then 03;(v%  
       nb = bb(i) 2p ,6=8^v  
    End If ".Ug A\0  
Next i \2b9A'd>  
    rt(0) = Sqr(nb) 9hzU@m  
    rr = rt() K;lC#  
  End If 5xKR ]u  
         > `M\xt  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  4|qp&%9-  

k95vgn%  
有热压工艺方面的人才或者资料分享下； :L,]<n  
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 %{Gqhb=u\  

高手真多！

楼主威武霸气.