[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： pDP33`OFh  
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关键点说几个： TeOFAIU  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） (69kvA&|q  
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 \?J=mE@;1  
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 l)|z2H  

以下是几个重要的函数： h]G6~TYI5  
1.判断点在区域中函数 }Ox2olUX  
2.计算夹角函数 Fj'\v#h  
3.转置函数 BF@m)w.v  
4.得到区域中心点，及区域半径函数 #1gTpb+t  
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） 1t!&xvhG  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 g;| n8]  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single yTMGIS
X5  
   cax = x2 - x1 D_L'x"  
   cay = y2 - y1 (cbB%  
   cbx = x2 - x3 O% j,:t'"  
   cby = y2 - y3 rElG7[+)p  
   mo_jj = cax * cbx + cay * cby P7M0Ce~iW  
   mo_ca = Sqr(cax * cax + cay * cay) x`&P}4v0  
   mo_cb = Sqr(cbx * cbx + cby * cby) 6'3Ey'drH  
   cos_acb = mo_jj / (mo_ca * mo_cb) ?,A8
fR  
   'ff_cos = cos_acb L>|A6S#y8/  
   If cos_acb >= 1 Then [C*Xk{e  
   nn = 0 \H}@-*z+)  
   ElseIf cos_acb <= -1 Then |qFN~!  
   nn = 3.14159265258979 +LvZ87O^~  
   Else D(W7O>5vQ2  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) KV3+}k  
   End If 5Lo==jHif  
   'ff_angle = nn -0[>}!l=G  
   ff_angle = nn * 180 / 3.14159265258979 L
S?` {E   
End Function

'判断点在区域内函数 MzA  
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 xfZ9&g  
Dim aob, boc, cod, doa, sum As Single !7#froh  
  If ppx = p1x And ppy = p1y Then et7T)(k0  
     point_in = True t2U]CI%  
     Exit Function D(2kb  
  End If NC#kI3{  
  If ppx = p2x And ppy = p2y Then ^U|CNB%.  
     point_in = True m78MWz]Yo  
     Exit Function 1[,#@!k@  
  End If c"_H%x<[  
   If ppx = p3x And ppy = p3y Then Ii2g+SlQDa  
     point_in = True 7kew/8-  
     Exit Function &dHm!b  
  End If _*-'yu8#  
      s`{#[&[  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) `dq3=  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ]f+D& qZ B  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) M@z_Z+q9  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ^Xz`hR   
    sum = aob + boc + cod + doa Y_TL4  
    If 360.01 > sum And sum > 359.99 Then XzTH,7[n  
       point_in = True 0Ci"tA3"  
    Else GqF.T#|  
       point_in = False lQ(BEv"2G[  
    End If smQpIB;  
End Function

'得到点半径,得到交点坐标函数 M%dl?9pbq  
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() R<YYf^y  
    '求得中心点坐标 GzE3B';g
 
Dim tt As String .TrQ +k>  
Dim rt(3) As Single "oGM>@q=B  
    '判断是否平行 h[v3G<C~r  
   acx = p3x - p1x I3y4O^?  
   acy = p3y - p1y
q.
K$b  
   bdx = p4x - p2x H<}Fk9  
   bdy = p4y - p2y @nW(KF  
   If acx * bdy = acy * bdx Then d"$oV~>P|  
      rt(0) = 0 "a_D]D(d5  
      Exit Function FT?1Q'  
   Else ?9ho|  
      '判断斜率存在否 o[+|n[aT)3  
      If p1x = p3x And p2x <> p4x Then Nb,H8;
 
         tt = "ac_n_bd_y" b5,}w:  
      ElseIf p1x <> p3x And p2x = p4x Then x@RA1&c  
         tt = "ac_y_bd_n" jm!C
^5!  
      ElseIf p1x <> p3x And p2x <> p4x Then 'f<_SKd  
         tt = "ac_y_bd_y" NGeeD?2~  
      End If *Z
o o  
    Select Case tt 2*;Y%NcP[  
         Case "ac_n_bd_y" u$ / ]59  
            'bd线段方程 }u*@b10  
            k_bd = bdy / bdx 9Q5P7}%p  
            b_bd = p2y - k_bd * p2x ?01""Om   
            p_x = p1x a/`Yh>ou  
            p_y = k_bd * p_x + b_bd NqfDY  
         Case "ac_y_bd_n" 9%k.GE  
            'ac线段方程 ^XB8A=xi  
            k_ac = acy / acx T1]X   
            b_ac = p1y - k_ac * p1x cNB$g )`  
            p_x = p2x 80"=Qu{s  
            p_y = k_ac * p_x + b_ac Rm1`D  
        Case "ac_y_bd_y" av$_hEjo|D  
           'ac，bd线段都要求 SX<mj  
           k_ac = acy / acx QKkr~?sTO  
           b_ac = p1y - k_ac * p1x [<I `slK  
           k_bd = bdy / bdx 3tcsj0Rb  
           b_bd = p2y - k_bd * p2x 7%FZXsD  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) p%y\`Nlgdx  
           p_y = k_ac * p_x + b_ac t'/;Z:  
        End Select a~TZ9yg+HL  
      rt(1) = p_x =}KbE4D+8  
      rt(2) = p_y 4gNRln-
 
    
~0{Kga  
'计算最大半径 )GKgK;=~  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) n^)9QQ  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Z|GkM5QH:  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) qiryC7.E  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) P&^7wud-sb  
Dim bb(5) As Single E.bbIV6mQ  
  bb(1) = rr1 9>>}-;$  
  bb(2) = rr2 25[/'7_"  
  bb(3) = rr3 RUtS_Z&  
  bb(4) = rr4 J0! E@  
  nb = rr1 M\6v}kUY  
For i = 1 To 4 i*/U.'#  
    If nb <= bb(i) Then YY
h_lAS>  
       nb = bb(i) L2$L.@  
    End If A:J{  
Next i OIT;fKl9  
    rt(0) = Sqr(nb)
bD-Em#>  
    rr = rt() W+S; Do  
  End If -{%''(G  
         .4(f0RG  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  qw1J{xoHW  

>oDP(]YGg  
有热压工艺方面的人才或者资料分享下； A!yLwkc:5  
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 lJ#>Y5Qg  

高手真多！

楼主威武霸气.