[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： "%>/rh2Iq  
u\=Nu4)Z F  
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关键点说几个： ~>#=$#V   
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） . 1?AU6\  
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 M-|4cd]6  
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 'lIT7MK  

以下是几个重要的函数： c&F"tLl  
1.判断点在区域中函数 dwAju:-H  
2.计算夹角函数 S ._9  
3.转置函数 Ij{{Z;o3  
4.得到区域中心点，及区域半径函数 0v',+-  
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） O'$:wc#  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 yfuvU2nVH  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single oa;[[2c  
   cax = x2 - x1 <qHwY.  
   cay = y2 - y1 $Ce`(/  
   cbx = x2 - x3 &)\0mpLK9  
   cby = y2 - y3 )t@OHSl  
   mo_jj = cax * cbx + cay * cby "&L<u0KHG  
   mo_ca = Sqr(cax * cax + cay * cay) 8(uxz84ce  
   mo_cb = Sqr(cbx * cbx + cby * cby) IVEvu3  
   cos_acb = mo_jj / (mo_ca * mo_cb) JLc\KVmF  
   'ff_cos = cos_acb @c7 On)sy  
   If cos_acb >= 1 Then p?8>9  
   nn = 0 Zf(ucAhL  
   ElseIf cos_acb <= -1 Then Ig5J_Z
^]b  
   nn = 3.14159265258979 D~2,0K  
   Else 1VJE+3  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 183'1Z$KA  
   End If ^B]M- XG  
   'ff_angle = nn }$g5
:k!  
   ff_angle = nn * 180 / 3.14159265258979 % J+'7'g  
End Function

'判断点在区域内函数 k]I<%  
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 kiqq_`66  
Dim aob, boc, cod, doa, sum As Single :vV?Yv%P)n  
  If ppx = p1x And ppy = p1y Then T[ mTA>d  
     point_in = True !X |Tf  
     Exit Function 3MkF  
  End If ^"*r'  
  If ppx = p2x And ppy = p2y Then ~#) DJ  
     point_in = True
N2q'$o  
     Exit Function dL[mX .j"  
  End If 5UjXpS  
   If ppx = p3x And ppy = p3y Then |A5]hL  
     point_in = True mufF_e)  
     Exit Function _gw~A{O  
  End If #[Ns\%Ri0  
     u~a<Psp&|  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 7\5 [lM  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 1/j}VC  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) w[]7{D];  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) tPFV6n i  
    sum = aob + boc + cod + doa O:k@'&  
    If 360.01 > sum And sum > 359.99 Then Nu|?s-  
       point_in = True qRB&R$  
    Else )UN@|IX  
       point_in = False o5AyJuS-u$  
    End If .VWH  
End Function

'得到点半径,得到交点坐标函数 8fZ\})t  
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() (3=.3[  
    '求得中心点坐标 ,!u^E|24  
Dim tt As String rP#@*{";  
Dim rt(3) As Single D:%$a]_f  
    '判断是否平行 H6e^"E  
   acx = p3x - p1x .RoO6:T6  
   acy = p3y - p1y Z1OX9]##r  
   bdx = p4x - p2x IKAF%0[R|j  
   bdy = p4y - p2y ka"jv"z  
   If acx * bdy = acy * bdx Then ,>"1'i&@  
      rt(0) = 0 N[zI@>x  
      Exit Function Gz^g!N[  
   Else AF **@iG  
      '判断斜率存在否 */?L_\7  
      If p1x = p3x And p2x <> p4x Then NE3G!qxL  
         tt = "ac_n_bd_y" `p'L3u5H-  
      ElseIf p1x <> p3x And p2x = p4x Then WE
T $H,  
         tt = "ac_y_bd_n" /WMG)#kw'  
      ElseIf p1x <> p3x And p2x <> p4x Then .L6t3/^  
         tt = "ac_y_bd_y" (7-K4j`   
      End If | M-@Qvgh  
    Select Case tt e#&[4tQF  
         Case "ac_n_bd_y" | ql!@M(p  
            'bd线段方程 ,cgC_%  
            k_bd = bdy / bdx &[JI L=m5  
            b_bd = p2y - k_bd * p2x Og-Mnx3  
            p_x = p1x T73saeN  
            p_y = k_bd * p_x + b_bd 0~BQ8O=+mn  
         Case "ac_y_bd_n" ]FQ4v.7  
            'ac线段方程 AB+Zc ]  
            k_ac = acy / acx SLZv`  
            b_ac = p1y - k_ac * p1x ("mW=Ln  
            p_x = p2x uCmdNY  
            p_y = k_ac * p_x + b_ac m0
/J3  
        Case "ac_y_bd_y" {zmo7~=  
           'ac，bd线段都要求 r|0C G^:C  
           k_ac = acy / acx iHQFieZ.E  
           b_ac = p1y - k_ac * p1x _VR4|)1g  
           k_bd = bdy / bdx  '6 w|z^  
           b_bd = p2y - k_bd * p2x eYR/k
Z%<  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) bu@Pxz%_  
           p_y = k_ac * p_x + b_ac 
0fNWI  
        End Select -YSn 3=  
      rt(1) = p_x
2Uu,Vv  
      rt(2) = p_y =fG(K!AQ  
     BWw7o{d  
'计算最大半径 ^JYR^X>_  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) q_HD`tW  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) bFJmXx&  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) L\hPw{)  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) "D@
m/l  
Dim bb(5) As Single 5)&e2V',y  
  bb(1) = rr1 VVCCPK^<  
  bb(2) = rr2 ~V5k  
  bb(3) = rr3 )Q7;)iPY#  
  bb(4) = rr4 ?Vt$  
  nb = rr1 "
@`M>)*o  
For i = 1 To 4 w&f29#i;b  
    If nb <= bb(i) Then {SK8Mdn  
       nb = bb(i) G++kUo<  
    End If NW!e@;E+i  
Next i /Tv< l  
    rt(0) = Sqr(nb) B-M|}T  
    rr = rt() H]@Zp"7  
  End If AZ!G-73  
         6jF~zI^  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  IP{Cj
=  

-B`;Sx  
有热压工艺方面的人才或者资料分享下； xnh%nv<v{  
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 *23
  

高手真多！

楼主威武霸气.