[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： 7JBr{3;eS  
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关键点说几个： {XwDvLZ  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） W
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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 ~yA^6[a=  
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 mP?}h  

以下是几个重要的函数： S"`{ JCW$  
1.判断点在区域中函数 'R99m?"  
2.计算夹角函数 ngk:q5Tp  
3.转置函数 ?v'CuWS  
4.得到区域中心点，及区域半径函数 CIRMAX  
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） 7Q,<h8N\5  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Ok}e|b[D  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single aJc>"#+
o  
   cax = x2 - x1 llCE}Vdh  
   cay = y2 - y1 a FWTm,)  
   cbx = x2 - x3 ' -aLBAxy  
   cby = y2 - y3 _^!C4?2!  
   mo_jj = cax * cbx + cay * cby ETR7%0$r  
   mo_ca = Sqr(cax * cax + cay * cay) hqwsgJ  
   mo_cb = Sqr(cbx * cbx + cby * cby) &v9"lR=_k  
   cos_acb = mo_jj / (mo_ca * mo_cb) v[?gM.SF  
   'ff_cos = cos_acb QD1&"T<.d.  
   If cos_acb >= 1 Then )0Vj\>  
   nn = 0 ucbtPTFYvr  
   ElseIf cos_acb <= -1 Then zB\ 8<97C  
   nn = 3.14159265258979 %:dd#';g  
   Else -W:@3\{  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Dhk$
e  
   End If pTJ_DH  
   'ff_angle = nn ?wjk=h
M2  
   ff_angle = nn * 180 / 3.14159265258979 8-smL^~%#  
End Function

'判断点在区域内函数 %
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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 _sHeB7K  
Dim aob, boc, cod, doa, sum As Single $A(3-n5=  
  If ppx = p1x And ppy = p1y Then ~\%H0.P6  
     point_in = True dE(d'*+a  
     Exit Function {4%ddJn[.)  
  End If "{jVsih0  
  If ppx = p2x And ppy = p2y Then Af^9WJ  
     point_in = True = @FT$GQ  
     Exit Function T8j
<\0WW  
  End If 9s*UJIL  
   If ppx = p3x And ppy = p3y Then YKx+z[A/p  
     point_in = True QKoJxjR=^  
     Exit Function m^^#3*qa  
  End If 0BOL0<Wq  
     ,yi@?lc  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) sr:hRQ27  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) zS?DXE  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) lB|.TCbW  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) -1R7 8(1  
    sum = aob + boc + cod + doa 0s.4]Zg>5  
    If 360.01 > sum And sum > 359.99 Then (k%r_O6  
       point_in = True fY|vq amA;  
    Else t"6u  
       point_in = False mn\GLR.  
    End If  ww\2  
End Function

'得到点半径,得到交点坐标函数 u 0 K1n_  
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() cP0(Q+i7  
    '求得中心点坐标 J!zL)u|  
Dim tt As String  1oG'm  
Dim rt(3) As Single )/{~&LU  
    '判断是否平行 ?gXdi<2Qn  
   acx = p3x - p1x 4{" v  
   acy = p3y - p1y SN#N$] y5s  
   bdx = p4x - p2x l+O\oD?-  
   bdy = p4y - p2y 6x8lnXtA  
   If acx * bdy = acy * bdx Then '_xa>T}  
      rt(0) = 0 @OC*:?!4  
      Exit Function QFEc?sEe  
   Else [g:KFbEY  
      '判断斜率存在否 cHwN=mg]S  
      If p1x = p3x And p2x <> p4x Then 7L!q{%}  
         tt = "ac_n_bd_y" =5h,ZB2A  
      ElseIf p1x <> p3x And p2x = p4x Then QST-!`]v  
         tt = "ac_y_bd_n" %#7^b=;=  
      ElseIf p1x <> p3x And p2x <> p4x Then f<@`{oP@  
         tt = "ac_y_bd_y" DZ5h<1  
      End If x4@IK|CE  
    Select Case tt 0"`|f0}c  
         Case "ac_n_bd_y" QWK\6  
            'bd线段方程 Dn;$4Dak(  
            k_bd = bdy / bdx Oxh.&  
            b_bd = p2y - k_bd * p2x e&=T`  
            p_x = p1x A#w*r-P  
            p_y = k_bd * p_x + b_bd UC"_#!3  
         Case "ac_y_bd_n" })ic@ Mmd$  
            'ac线段方程 w;T?m,"  
            k_ac = acy / acx G~Fjla\?Q  
            b_ac = p1y - k_ac * p1x a]R1Fi0n  
            p_x = p2x qg8T}y>  
            p_y = k_ac * p_x + b_ac 1=Q3WMT  
        Case "ac_y_bd_y" 0bR})}a+Yg  
           'ac，bd线段都要求 MY>o8A  
           k_ac = acy / acx p87VJ}  
           b_ac = p1y - k_ac * p1x @{8SC~ha  
           k_bd = bdy / bdx /w(t=Y  
           b_bd = p2y - k_bd * p2x k+Ay^i}s.  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) @jH8x!5u:  
           p_y = k_ac * p_x + b_ac dn=g!=  
        End Select }9(:W</}  
      rt(1) = p_x /%h<^YDBf  
      rt(2) = p_y J(x42Q}*S  
     Pb@9<NXm'  
'计算最大半径 7_AcvsdW  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) %%k`+nK~  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ~
,P."  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 4 O~zkg  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) '~kAsn*/  
Dim bb(5) As Single =Ev*Q[  
  bb(1) = rr1 ADN  
  bb(2) = rr2 pL)o@-k#%  
  bb(3) = rr3 a`uHkRX )U  
  bb(4) = rr4 AP_2.V=Sn  
  nb = rr1 F /% 5 r{  
For i = 1 To 4 +;wu_CQu  
    If nb <= bb(i) Then -OV!56&  
       nb = bb(i) GOhGSV#  
    End If >2?O-WXe  
Next i )]C7+{ImC  
    rt(0) = Sqr(nb) ^H UNq[sQ  
    rr = rt() B*j AD2  
  End If l*C(FPw4  
         sDvtk]4o-4  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ?th`5K30  

+IiL(\ew  
有热压工艺方面的人才或者资料分享下； q1Vh]d  
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 %{*}KsS`p  

高手真多！

楼主威武霸气.