[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： I\hh8abAp  
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关键点说几个： VzBqjE_  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ,/[6e\0~  
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 r[1i*b$  
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 ADZ};:]  

以下是几个重要的函数： `(T,+T4C5k  
1.判断点在区域中函数 ^L0d/,ik  
2.计算夹角函数 jQk*8  
3.转置函数 Kqun^"Df  
4.得到区域中心点，及区域半径函数 iM2W]  
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） syk!7zfK  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 u7bLZU 0  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ]"+95*B  
   cax = x2 - x1 ?in|qevL  
   cay = y2 - y1 .R)PJc5^  
   cbx = x2 - x3 XIvn_&d;G  
   cby = y2 - y3 Jwj%_<  
   mo_jj = cax * cbx + cay * cby ktK_e  
   mo_ca = Sqr(cax * cax + cay * cay) (&&4J{`W9  
   mo_cb = Sqr(cbx * cbx + cby * cby) *J$=.fF1  
   cos_acb = mo_jj / (mo_ca * mo_cb) PpV'F[|,r  
   'ff_cos = cos_acb qZ]pq2G  
   If cos_acb >= 1 Then F&])P- !3  
   nn = 0 ii%+jdi.  
   ElseIf cos_acb <= -1 Then $k0k
k  
   nn = 3.14159265258979 z?>D_NLX6  
   Else h8 'v d3  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) @)-sTgn  
   End If Wqc)Fv70m  
   'ff_angle = nn D6CS8 ~"  
   ff_angle = nn * 180 / 3.14159265258979 MepuIh  
End Function

'判断点在区域内函数 wUiys/OVM  
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 N+LL@[  
Dim aob, boc, cod, doa, sum As Single PlF87j (  
  If ppx = p1x And ppy = p1y Then d}LRl"_n  
     point_in = True Rop'e8Q  
     Exit Function 8%%f%y
  
  End If b8$gx:aJ>$  
  If ppx = p2x And ppy = p2y Then #?*WPq  
     point_in = True g8Q5m=O*  
     Exit Function @+'-
ADX  
  End If QYa(N[~a  
   If ppx = p3x And ppy = p3y Then /EibEd\  
     point_in = True u
HH/rMV  
     Exit Function \%/#x V  
  End If ]Pry>N3G5  
     {~h*2n  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) cCo`~7rE  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) chV9_(8  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) I8+~ &V}  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) Sr
FS#  
    sum = aob + boc + cod + doa JT "B>y>  
    If 360.01 > sum And sum > 359.99 Then _<=S_<$2  
       point_in = True }Ow>dV?  
    Else e{X6i^% m_  
       point_in = False 56e r`=ms  
    End If gz
jR6uz  
End Function

'得到点半径,得到交点坐标函数 "t({D   
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() f6_];]yP  
    '求得中心点坐标 ^qg?6S4  
Dim tt As String 1"pI^Ddt  
Dim rt(3) As Single bHhtd_}  
    '判断是否平行 P6 ;'Sza  
   acx = p3x - p1x {NPuu?&  
   acy = p3y - p1y Cw~RJ^a_  
   bdx = p4x - p2x Yk'9U-.mc  
   bdy = p4y - p2y :N<.?%Kf  
   If acx * bdy = acy * bdx Then c&X{dJWD  
      rt(0) = 0 jn%
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      Exit Function UK$ms~H  
   Else Yly@ww9t|  
      '判断斜率存在否 K,6b3kk  
      If p1x = p3x And p2x <> p4x Then @*0cMO;SpG  
         tt = "ac_n_bd_y" j:}J}P  
      ElseIf p1x <> p3x And p2x = p4x Then `%E8-]{uS  
         tt = "ac_y_bd_n"  QV h4  
      ElseIf p1x <> p3x And p2x <> p4x Then G [:N0{v5  
         tt = "ac_y_bd_y" KjFK/Og.  
      End If P7 ]
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    Select Case tt oT{@_U{*J  
         Case "ac_n_bd_y" 2+cNo9f  
            'bd线段方程 1VF    
            k_bd = bdy / bdx 5aBAr  
            b_bd = p2y - k_bd * p2x Tx1vL  
            p_x = p1x -*~CV:2iq-  
            p_y = k_bd * p_x + b_bd 3)ma\+< 6  
         Case "ac_y_bd_n" op"$E1+  
            'ac线段方程 DbZ0e5  
            k_ac = acy / acx SFb{o<0 =  
            b_ac = p1y - k_ac * p1x ;>%~9j1C  
            p_x = p2x Bd^"=+c4  
            p_y = k_ac * p_x + b_ac G/d4f?RU  
        Case "ac_y_bd_y" ( 7ws{)  
           'ac，bd线段都要求 8 F2|  
           k_ac = acy / acx &f>eQS=(  
           b_ac = p1y - k_ac * p1x p1D[YeF4  
           k_bd = bdy / bdx (=16PYs  
           b_bd = p2y - k_bd * p2x -UZ@G~K  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) fQ'.8'>T  
           p_y = k_ac * p_x + b_ac =(EI~N  
        End Select tM,%^){p$  
      rt(1) = p_x 4"@GNk~e  
      rt(2) = p_y ?f*Q>3
S)  
     ewuXpv%vwW  
'计算最大半径 K7e4_ZGI  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) )i>[M"7  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) \ A%eG&  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ckjrk  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 7l."b$U4yv  
Dim bb(5) As Single z305{B:Y  
  bb(1) = rr1 Uw/l>\  
  bb(2) = rr2 E15vq6DKF  
  bb(3) = rr3 '.Ym!r~wL  
  bb(4) = rr4 /<&h@$NHH4  
  nb = rr1 jJ3zF3Id  
For i = 1 To 4 B
51kV0  
    If nb <= bb(i) Then 3Wcy)y>2Ap  
       nb = bb(i) cBYfXI0`  
    End If G\/"}B:(  
Next i [pg}S#A  
    rt(0) = Sqr(nb) LF?P> 1%-  
    rr = rt() mPPk)qy  
  End If H]\Zn%.#  
         ' )-M\'S$E  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ;vO@m!h}U  

ARL  
有热压工艺方面的人才或者资料分享下； *M~.3$NN  
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 fk5XvL  

高手真多！

楼主威武霸气.