[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： U*b SM8)L*  
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关键点说几个： }}]Y mf  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） u Qj#U m8  
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 )SQ g  
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 H!A^ MI  

以下是几个重要的函数： OY)x Kca  
1.判断点在区域中函数 3aOFpCs|#  
2.计算夹角函数 md_Ld /  
3.转置函数 F7hQNQu:  
4.得到区域中心点，及区域半径函数 )CB?gW  
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） "6}+|!"$  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ks;%f34  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single }dxdxnVt  
   cax = x2 - x1 hi=U  
   cay = y2 - y1 k9,"`dk@  
   cbx = x2 - x3 ?{2-,M0  
   cby = y2 - y3 Pv'x|
p*  
   mo_jj = cax * cbx + cay * cby gu/Yc`S[  
   mo_ca = Sqr(cax * cax + cay * cay) J0K"WmW  
   mo_cb = Sqr(cbx * cbx + cby * cby) v+OVZDf  
   cos_acb = mo_jj / (mo_ca * mo_cb) oHYD6qJX{  
   'ff_cos = cos_acb -K!-a'J  
   If cos_acb >= 1 Then -
"<f(  
   nn = 0 5YCbFk^  
   ElseIf cos_acb <= -1 Then $X?V_K;9/  
   nn = 3.14159265258979 M]'AA Uo8  
   Else BO_^3Me*  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) d?K8Ygz  
   End If NWvxbv  
   'ff_angle = nn L_~G`Rb3  
   ff_angle = nn * 180 / 3.14159265258979 OTm`i>rB  
End Function

'判断点在区域内函数 I%Awj(9BS  
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 tu'MYY  
Dim aob, boc, cod, doa, sum As Single wB^a1=C  
  If ppx = p1x And ppy = p1y Then \9p;md`  
     point_in = True erqB/C  
     Exit Function Ua]zTMI  
  End If #q- _  
  If ppx = p2x And ppy = p2y Then !=we7vK}  
     point_in = True yiOF&  
     Exit Function `FwAlYJK  
  End If G!\xc  
   If ppx = p3x And ppy = p3y Then PG!vn@b6  
     point_in = True `g=~u{0  
     Exit Function k-U/x"Pl  
  End If ,b4&$W].  
     ry0 =N^  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 5*AKl< Jl  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) AMdS+(J  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 3(%,2  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) <Va>5R_
d<  
    sum = aob + boc + cod + doa \K6J{;#L  
    If 360.01 > sum And sum > 359.99 Then S\A[Z&k0  
       point_in = True wu')Q/v  
    Else Zux2VepT  
       point_in = False s<b7/;w'  
    End If wLbngO=VG  
End Function

'得到点半径,得到交点坐标函数 .Q@"];wH  
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() AHGcWS\,X  
    '求得中心点坐标 iE(g
rI3  
Dim tt As String rRYf.~UH@P  
Dim rt(3) As Single V{{x~Q9  
    '判断是否平行 (#]KjpIK  
   acx = p3x - p1x Ysu/7o4  
   acy = p3y - p1y @:B1  
   bdx = p4x - p2x Fev3CV$  
   bdy = p4y - p2y @_3$(*n$~  
   If acx * bdy = acy * bdx Then lQ"i]};<D  
      rt(0) = 0 v=VmiB
q[  
      Exit Function ?W_U{=anl  
   Else 7g9^Jn  
      '判断斜率存在否 RZA\-?cO)  
      If p1x = p3x And p2x <> p4x Then #cS,5(BM  
         tt = "ac_n_bd_y" t;Om9  
      ElseIf p1x <> p3x And p2x = p4x Then N&=2 /  
         tt = "ac_y_bd_n" n b
k(FD6  
      ElseIf p1x <> p3x And p2x <> p4x Then CN(4;-so)  
         tt = "ac_y_bd_y" B:cOcd?p  
      End If 1#"Q'
,7  
    Select Case tt .Er/t"Qs;  
         Case "ac_n_bd_y" ?` i/  
            'bd线段方程 J-F_XKqH  
            k_bd = bdy / bdx ;0}2@Q2@ZK  
            b_bd = p2y - k_bd * p2x ^<0NIu}  
            p_x = p1x }8 _9V|E  
            p_y = k_bd * p_x + b_bd i&)C,  
         Case "ac_y_bd_n" PDng!IQ^  
            'ac线段方程 79H+~1Az  
            k_ac = acy / acx :'~ gLW>j  
            b_ac = p1y - k_ac * p1x VAGMI+ -  
            p_x = p2x VY@hhr1s~  
            p_y = k_ac * p_x + b_ac tL{~O=  
        Case "ac_y_bd_y" <9a_wGs  
           'ac，bd线段都要求 ecpUp39\  
           k_ac = acy / acx *J5RueUG  
           b_ac = p1y - k_ac * p1x A'iF'<%  
           k_bd = bdy / bdx [oLQd-+  
           b_bd = p2y - k_bd * p2x mX@*2I  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) j9'XZq}  
           p_y = k_ac * p_x + b_ac \/'n[3x  
        End Select a] =\h'S  
      rt(1) = p_x Ag0_^  
      rt(2) = p_y @H0%N
53nE  
     k
^c=y<I  
'计算最大半径 _PUm Pom.  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) <Cu?$  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 9Pk3}f)a  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) `sy &dyM  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) OG7v'vmY  
Dim bb(5) As Single 5'Jh2r
 
  bb(1) = rr1 O)%kl  
  bb(2) = rr2 e
.|RC  
  bb(3) = rr3 DN':-PK  
  bb(4) = rr4 YzW7;U S  
  nb = rr1 8:?Q(M7  
For i = 1 To 4 :;q_f+U  
    If nb <= bb(i) Then g*?+~0"`Y  
       nb = bb(i) U9.=Ik  
    End If I S8nvx\  
Next i kjC{Zr  
    rt(0) = Sqr(nb) W<|K  
    rr = rt() wx%nTf/Oa  
  End If VfqY_NmgC  
         >"g<-!p@  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  TvWU[=4Yk  

.kbr?N,
'  
有热压工艺方面的人才或者资料分享下； x7KcO0F{  
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 Z(LxB$^l[  

高手真多！

楼主威武霸气.