[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： kD4J{\  
X$$b:q  
vM/D7YS:  

关键点说几个： "( P-VX  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ]$a,/Jt  
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 %'i`Chc^!;  
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 6`
hHx=L  

以下是几个重要的函数： C'jE'B5b  
1.判断点在区域中函数 a6fqtkZ x  
2.计算夹角函数 V$XCe  
3.转置函数 V:8ph`1  
4.得到区域中心点，及区域半径函数 /5c;,.hm1R  
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） XT 'v7  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 =9ISsI\Y6  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 4uG:*0{Yx  
   cax = x2 - x1 E1e#E3Yq}s  
   cay = y2 - y1 z rV  
   cbx = x2 - x3 7Ed6o  
   cby = y2 - y3 u.s-/ g  
   mo_jj = cax * cbx + cay * cby Tv{X$`%  
   mo_ca = Sqr(cax * cax + cay * cay) ` E2@GX+,  
   mo_cb = Sqr(cbx * cbx + cby * cby) tzeS D C  
   cos_acb = mo_jj / (mo_ca * mo_cb) g
 :me:M  
   'ff_cos = cos_acb \y G
//  
   If cos_acb >= 1 Then hh!^^emo  
   nn = 0 K;wd2/
jmJ  
   ElseIf cos_acb <= -1 Then _DK%-,Spu  
   nn = 3.14159265258979 okO^/"  
   Else $m;rOKVU  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 'v"{frh  
   End If S>o
Qm  
   'ff_angle = nn [z1[4  
   ff_angle = nn * 180 / 3.14159265258979 z5G$'  
End Function

'判断点在区域内函数 :Q\{LBc  
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 od7 [h5r  
Dim aob, boc, cod, doa, sum As Single uV:;q>XM'%  
  If ppx = p1x And ppy = p1y Then xi]qdiA  
     point_in = True s4RqMO5eI  
     Exit Function S;vE%  
  End If P-?ya!@"  
  If ppx = p2x And ppy = p2y Then 52$7vYMto  
     point_in = True +
a%Vp!y  
     Exit Function qd9CKd  
  End If fJ3*'(  
   If ppx = p3x And ppy = p3y Then  ;Q;u^T`  
     point_in = True /\S1p3EW*  
     Exit Function 'Lw4jq
 
  End If 7B`,q-x.  
     6}YWM]c%  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y)
eUyQSI4A  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) F]hKi`@  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) g9fS|T  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ?t&sT  
    sum = aob + boc + cod + doa i9.~cnk  
    If 360.01 > sum And sum > 359.99 Then Cc?BJ  
       point_in = True '[ZRWwhr  
    Else &VIX?UngE  
       point_in = False QeYO)sc`  
    End If H1(Zzn1  
End Function

'得到点半径,得到交点坐标函数 KLI(Rve24  
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() xS) njuq4  
    '求得中心点坐标 ,"PKGd]^  
Dim tt As String (~~*PT-  
Dim rt(3) As Single =_%i5]89P  
    '判断是否平行 "p43#  
   acx = p3x - p1x K|-?1)Um  
   acy = p3y - p1y 9]AiaV9  
   bdx = p4x - p2x a1;P2ikuK  
   bdy = p4y - p2y ?=:wIMV  
   If acx * bdy = acy * bdx Then qRg^Bp'VD#  
      rt(0) = 0 KgtMrT5<q  
      Exit Function 4WV'\R+m  
   Else sp4J%2b  
      '判断斜率存在否 xkIRI1*!  
      If p1x = p3x And p2x <> p4x Then `mro2A  
         tt = "ac_n_bd_y" m>
C}T  
      ElseIf p1x <> p3x And p2x = p4x Then 93="sS  
         tt = "ac_y_bd_n" V6.xp{[  
      ElseIf p1x <> p3x And p2x <> p4x Then T~%}(0=m  
         tt = "ac_y_bd_y" M{U{iS  
      End If wD}ojA&DU  
    Select Case tt <$#b3F"I  
         Case "ac_n_bd_y" P@ewr}  
            'bd线段方程 ,EyZ2`|  
            k_bd = bdy / bdx HS{a^c%  
            b_bd = p2y - k_bd * p2x BlF]-dF\  
            p_x = p1x <MgR x9  
            p_y = k_bd * p_x + b_bd ~f&lQN'1  
         Case "ac_y_bd_n" ecK{+Z'G  
            'ac线段方程 5"4O_JQ  
            k_ac = acy / acx u~#QvA~]  
            b_ac = p1y - k_ac * p1x cd8~y  
            p_x = p2x W+3ZuAP\n  
            p_y = k_ac * p_x + b_ac 9Foo8e  
        Case "ac_y_bd_y" G3{t{XkV  
           'ac，bd线段都要求 SST1vzm!  
           k_ac = acy / acx T:ye2yg  
           b_ac = p1y - k_ac * p1x W=v4dy]B  
           k_bd = bdy / bdx 8+no>%L  
           b_bd = p2y - k_bd * p2x <szD"p|K  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) V`OeJVe  
           p_y = k_ac * p_x + b_ac P q\m8iS,w  
        End Select c[:OK9TH  
      rt(1) = p_x Z^i=51  
      rt(2) = p_y 6Q<^,`/T  
     | ,bCYK  
'计算最大半径 Y>KRI2](<  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 1eC1Cyw  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ^h+,Kn0@  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 8(R%?>8  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) OR[6pr@  
Dim bb(5) As Single 5Xn+cw*  
  bb(1) = rr1 BJI}gm2y  
  bb(2) = rr2 +u%^YBr  
  bb(3) = rr3 i>!7/o  
  bb(4) = rr4 %Z@+K_X9x  
  nb = rr1 d,}fp)  
For i = 1 To 4 WvG0hts=[  
    If nb <= bb(i) Then SFr
QPdX6V  
       nb = bb(i) 2}Dd{kC-  
    End If ncg5%(2  
Next i tlw$/tMa  
    rt(0) = Sqr(nb) kt8P\/~*i  
    rr = rt() +Hz});ix<  
  End If TJ@@kSSbl  
         ("{JNA/  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  SS?^-BI  

ConXP\M-  
有热压工艺方面的人才或者资料分享下； )cA#2mlS'1  
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 N ]/N}b  

高手真多！

楼主威武霸气.