[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： "p"M9P'  
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关键点说几个： m"|AD/2;(  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 9aacW  
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 B/^1uPTZ71  
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 !RPPwvNk4  

以下是几个重要的函数： v-MrurQ4  
1.判断点在区域中函数 kKHGcm^r  
2.计算夹角函数 B s{n  
3.转置函数 x9qoS)@CM  
4.得到区域中心点，及区域半径函数 OBp&64  
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） FG{45/0We  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 yu98d1  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single g>&b&X&Y_  
   cax = x2 - x1 ^1jZwP;5eW  
   cay = y2 - y1 F
8En)#  
   cbx = x2 - x3  cq,8^o&  
   cby = y2 - y3 e<E]8GAF  
   mo_jj = cax * cbx + cay * cby 5a^b{=#Y  
   mo_ca = Sqr(cax * cax + cay * cay) G8hq;W4@]/  
   mo_cb = Sqr(cbx * cbx + cby * cby) +H `FC  
   cos_acb = mo_jj / (mo_ca * mo_cb) x/]]~@:  
   'ff_cos = cos_acb Yd>ej1<  
   If cos_acb >= 1 Then m{VC1BkZ  
   nn = 0 OLh QS_D  
   ElseIf cos_acb <= -1 Then j%TcW!D-_  
   nn = 3.14159265258979 okSCM#&:[2  
   Else
=zXA0%  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) kM o7mkV  
   End If r_EuLFMA  
   'ff_angle = nn .`5BgX7W  
   ff_angle = nn * 180 / 3.14159265258979 o?]g  
End Function

'判断点在区域内函数 $Eh8s(  
Function point_in(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single, ppx As Single, ppy As Single) As Boolean /
GDGE }  
Dim aob, boc, cod, doa, sum As Single cUPC8k.1  
  If ppx = p1x And ppy = p1y Then (;1Pgh  
     point_in = True 0oU;Cmw.  
     Exit Function #fTPo:*t  
  End If Ljq!\D  
  If ppx = p2x And ppy = p2y Then 7]&ouT  
     point_in = True Zyx92z9Y  
     Exit Function tMnwY'  
  End If TexSUtx@$  
   If ppx = p3x And ppy = p3y Then cN]]J  
     point_in = True ZA!yw7~  
     Exit Function Or9`E(  
  End If xOgUX6n  
     @b,&b6V  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) {;[W'Lc  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 2ij
/!  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) KfkE'_F  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) %J%ZoptY:  
    sum = aob + boc + cod + doa X1GpLy)p  
    If 360.01 > sum And sum > 359.99 Then WG\gf\=I  
       point_in = True F>!gwmn~  
    Else BMlu>,  
       point_in = False ]Y%U5\$  
    End If qZ79IX'y  
End Function

'得到点半径,得到交点坐标函数 3$hbb6N%6.  
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() SSh=r  
    '求得中心点坐标 ; Da[jFP  
Dim tt As String rt5eN:'qY  
Dim rt(3) As Single i9FtS7  
    '判断是否平行 `4N{x.N  
   acx = p3x - p1x C"=^(HU  
   acy = p3y - p1y Nr(3!-
  
   bdx = p4x - p2x [q5N 4&q\  
   bdy = p4y - p2y :a#pzEK  
   If acx * bdy = acy * bdx Then 1G6MO  
      rt(0) = 0 pPX~pPIj2  
      Exit Function ^& R H]q  
   Else ^twJNm{99  
      '判断斜率存在否 z%
pD3J?>  
      If p1x = p3x And p2x <> p4x Then _=\=oC  
         tt = "ac_n_bd_y" `T \"B%  
      ElseIf p1x <> p3x And p2x = p4x Then /j0zb&  
         tt = "ac_y_bd_n" QV@NA@;XZ  
      ElseIf p1x <> p3x And p2x <> p4x Then V&>\U?q:  
         tt = "ac_y_bd_y" h
)746T )  
      End If ZX Sl+k.  
    Select Case tt #ErIot  
         Case "ac_n_bd_y" xWa96U[  
            'bd线段方程 hDf|9}/UQd  
            k_bd = bdy / bdx l`}Ag8Q  
            b_bd = p2y - k_bd * p2x cIIt ;q[  
            p_x = p1x k;?Oi?]  
            p_y = k_bd * p_x + b_bd ydyGPZt  
         Case "ac_y_bd_n"
uDZ$'a  
            'ac线段方程 +.RC{o,  
            k_ac = acy / acx 1`X- O>  
            b_ac = p1y - k_ac * p1x SB3=5"q  
            p_x = p2x tKik)ei  
            p_y = k_ac * p_x + b_ac C;3>q*Am4  
        Case "ac_y_bd_y" MGmUgc  
           'ac，bd线段都要求 u?>]C6$  
           k_ac = acy / acx )E2^G)J$W  
           b_ac = p1y - k_ac * p1x NQD*8PGfj  
           k_bd = bdy / bdx kK]^q|vb6  
           b_bd = p2y - k_bd * p2x kZ0|wML8  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) c&o|I4|Y,  
           p_y = k_ac * p_x + b_ac N2~q\BqA  
        End Select Ve1O<i  
      rt(1) = p_x N{f4-i~  
      rt(2) = p_y >WsRCBA  
     E|aPkq]  
'计算最大半径 /<Doe SDJ|  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 8>}^
W  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ;BR`}~m  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) N~%F/`Z<+  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) gDmwJr  
Dim bb(5) As Single o~*5FN}%+l  
  bb(1) = rr1 {[&_)AW6m%  
  bb(2) = rr2 / xfg4  
  bb(3) = rr3 'kD~tpZ  
  bb(4) = rr4 cN{-&\ 6L  
  nb = rr1 *1Lkde@|{  
For i = 1 To 4 Uv-xP(X  
    If nb <= bb(i) Then -cjwa-9 ~  
       nb = bb(i) ?Q< o-o;B  
    End If 3']yjj(gHr  
Next i !U@?Va~Zn  
    rt(0) = Sqr(nb) l9J]<gG  
    rr = rt() |Ki\Q3O1  
  End If S'I{'jP5  
         {ER%r'(4Z  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  C3af>L@}  

3S-nsMs.  
有热压工艺方面的人才或者资料分享下； bQlShVJL  
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 sKhX0,s&  

高手真多！

楼主威武霸气.