[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： YN]xI  
ZNDn! Sj  
_+7+90u  

关键点说几个： +$}3=n34)  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ^%n]_[RUn4  
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 `' .;U=mF  
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 'GI| t  

以下是几个重要的函数： m#Ydq(0+  
1.判断点在区域中函数 9])Id;+91  
2.计算夹角函数 mv
,5Q6!  
3.转置函数 {^D; ($lm  
4.得到区域中心点，及区域半径函数 $d-$dM?R5  
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） Z;O!KsJ  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 p/yz`m T'w  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single (mr*Thy`@  
   cax = x2 - x1 0bpGPG's&  
   cay = y2 - y1 KPVu-{_Fi  
   cbx = x2 - x3 ~470LgpO1  
   cby = y2 - y3 Hu9nJ  
   mo_jj = cax * cbx + cay * cby S{RRlR6Z  
   mo_ca = Sqr(cax * cax + cay * cay) RBz"1hRo`  
   mo_cb = Sqr(cbx * cbx + cby * cby) H&8~"h6n  
   cos_acb = mo_jj / (mo_ca * mo_cb) Im?/#tX  
   'ff_cos = cos_acb 25f[s.pv8  
   If cos_acb >= 1 Then $Zr \$z2  
   nn = 0 ?S;z!) H)P  
   ElseIf cos_acb <= -1 Then e"UXG\8D  
   nn = 3.14159265258979 Q;N)$Xx  
   Else ^&\pY  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) >k ==7#P  
   End If G1-r$7\  
   'ff_angle = nn ^OV!Q\j.q  
   ff_angle = nn * 180 / 3.14159265258979 a"i(.(9$J  
End Function

'判断点在区域内函数 CDF;cM"td  
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 $}IG+,L  
Dim aob, boc, cod, doa, sum As Single ck%.D%=  
  If ppx = p1x And ppy = p1y Then s$zm)y5  
     point_in = True \03<dUA6  
     Exit Function Z t4q= Lr  
  End If <2oMk#Ng^  
  If ppx = p2x And ppy = p2y Then [MQ* =*
 
     point_in = True p0y|pD  
     Exit Function skXzck  
  End If >Tjl?CS  
   If ppx = p3x And ppy = p3y Then 1;KJUf[N  
     point_in = True *|j4>W\J  
     Exit Function H5#]MOAP
 
  End If m,"-/)  
     N p*T[J  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) daP_Kz/2K  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) BQ<\[H;  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) |'&$VzA  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) o=#ym4hJ%  
    sum = aob + boc + cod + doa +*xc4  
    If 360.01 > sum And sum > 359.99 Then #?+[|RS|  
       point_in = True ~ o2Z5,H  
    Else kGs\"zZM  
       point_in = False u Fw1%  
    End If AbhR*  
End Function

'得到点半径,得到交点坐标函数 oemN$g&7  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() %WKBd\O  
    '求得中心点坐标 w&T\8k=  
Dim tt As String 2LR y/ah  
Dim rt(3) As Single
[B
`4I  
    '判断是否平行 {$Uj&/IC  
   acx = p3x - p1x 
7]{t^*  
   acy = p3y - p1y k H<C9z2=  
   bdx = p4x - p2x S
rB>_0**  
   bdy = p4y - p2y 
K!qOO  
   If acx * bdy = acy * bdx Then V=5S=7 Z:  
      rt(0) = 0 rM,f7hm[S*  
      Exit Function yGNpx3H  
   Else U^|T{g+O  
      '判断斜率存在否 1ig*Xp[  
      If p1x = p3x And p2x <> p4x Then ?>{u@tYL  
         tt = "ac_n_bd_y" #"~\/sb   
      ElseIf p1x <> p3x And p2x = p4x Then U?Dr0wD;[  
         tt = "ac_y_bd_n" <`"  
      ElseIf p1x <> p3x And p2x <> p4x Then 6M`gy|"(~  
         tt = "ac_y_bd_y" rm ;U'&{  
      End If D!O
Y<?  
    Select Case tt 1$.svR  
         Case "ac_n_bd_y" szhSI  
            'bd线段方程 boCi*]  
            k_bd = bdy / bdx -0<vmU  
            b_bd = p2y - k_bd * p2x l'_]0%o]  
            p_x = p1x K> 4w
 
            p_y = k_bd * p_x + b_bd [ dVBsi  
         Case "ac_y_bd_n" AaxQBTB  
            'ac线段方程 Al6%RFt  
            k_ac = acy / acx _b/zBF
a%  
            b_ac = p1y - k_ac * p1x ]|PTZ1?j  
            p_x = p2x 9XtO#!+48  
            p_y = k_ac * p_x + b_ac 1\UU"  
        Case "ac_y_bd_y" $:oC\K6  
           'ac，bd线段都要求 ~Gmt,l!b  
           k_ac = acy / acx ZiQ<SSo:  
           b_ac = p1y - k_ac * p1x 9 Xl#$d5  
           k_bd = bdy / bdx QICxS
k  
           b_bd = p2y - k_bd * p2x j;E$7QH[  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) T%&vq6  
           p_y = k_ac * p_x + b_ac %i/|}K  
        End Select ;`Xm?N  
      rt(1) = p_x Y$"
m*0  
      rt(2) = p_y $z*"@  
     d>mZY66P  
'计算最大半径 - EGZ  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) J ;z
`bk^  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) #B
cUE?K*N  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ,D*bLXWh  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 
@iV-pJ-  
Dim bb(5) As Single GRYw_}Aa  
  bb(1) = rr1 zI,Qc60B  
  bb(2) = rr2 r,.j^a  
  bb(3) = rr3 ,
aUbB8  
  bb(4) = rr4 f42F@M(:  
  nb = rr1 /;Hqv`X7  
For i = 1 To 4 KMkD6g  
    If nb <= bb(i) Then e21J9e6z  
       nb = bb(i) \+sa[
jK  
    End If hx;kNcPbI  
Next i ;Wy03}K4J  
    rt(0) = Sqr(nb) "5k6FV  
    rr = rt() 3{~(_  
  End If <EgJm`V  
         7- LjBlH  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  *JFkqbf  

n^|xp;] :  
有热压工艺方面的人才或者资料分享下； (gVN<Es  
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 (=WYi~2v  

高手真多！

楼主威武霸气.