[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： k;jXVa  
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关键点说几个： Em(Okr,0  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） >{>X.I~  
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 D&G^|: 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 +-qa7  

以下是几个重要的函数： 'l_F@ZO{(  
1.判断点在区域中函数 Ey{p;;H  
2.计算夹角函数 NKl`IiGv  
3.转置函数 u@t~*E5BpM  
4.得到区域中心点，及区域半径函数 2x~Pq_?y  
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） ?Cv([ ^Y.u  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 QwL*A `@  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single t+D= @"BZP  
   cax = x2 - x1 V>c !V9w  
   cay = y2 - y1 `nY.&YT  
   cbx = x2 - x3 m]c1DvQb  
   cby = y2 - y3 oA3;P]~[  
   mo_jj = cax * cbx + cay * cby N_d{E/  
   mo_ca = Sqr(cax * cax + cay * cay) 6W:FT Pt44  
   mo_cb = Sqr(cbx * cbx + cby * cby) rp|A88Q/!  
   cos_acb = mo_jj / (mo_ca * mo_cb) 5F#FC89Kk  
   'ff_cos = cos_acb O^@F?CG :1  
   If cos_acb >= 1 Then = BbG2k  
   nn = 0 `uC^"R(m  
   ElseIf cos_acb <= -1 Then zx@L sp  
   nn = 3.14159265258979 eKf5orN  
   Else w+a5/i@  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) N1"p ;czK  
   End If 1fC)&4W  
   'ff_angle = nn 0[ (kFe  
   ff_angle = nn * 180 / 3.14159265258979 tJmy}.t1  
End Function

'判断点在区域内函数 _&S
;*?K.  
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 Rtlc&Q.b  
Dim aob, boc, cod, doa, sum As Single |>'q%xK  
  If ppx = p1x And ppy = p1y Then |9X2AS Qu  
     point_in = True uh% J  
     Exit Function Mi\- 9-  
  End If }$g"|;<ha  
  If ppx = p2x And ppy = p2y Then #g'j0N  
     point_in = True `gyke2n  
     Exit Function p,!IPWo  
  End If e X6o7a  
   If ppx = p3x And ppy = p3y Then pl$wy}W-  
     point_in = True mq(-L  
     Exit Function r$Ni>[as  
  End If F{rC{5@fj  
     o-JB,^TE  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Rt5pl,Nf  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) eu":\ks  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) <":83RCS  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 8kvA^r`  
    sum = aob + boc + cod + doa fxmY,{{  
    If 360.01 > sum And sum > 359.99 Then DiGHo~f  
       point_in = True xM@s`s|n  
    Else OR37  
       point_in = False 0d1!Q!PH3  
    End If #lMC#Ld  
End Function

'得到点半径,得到交点坐标函数 0C\cM92o  
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() GG-b)64h`  
    '求得中心点坐标 yu&muCA  
Dim tt As String W\mgM2p  
Dim rt(3) As Single f.bwA x  
    '判断是否平行
2aX$7E?  
   acx = p3x - p1x D,|TQQ  
   acy = p3y - p1y {47Uu%XT  
   bdx = p4x - p2x ~wOMT  
   bdy = p4y - p2y qg|ark*1u  
   If acx * bdy = acy * bdx Then L3'isaz&^  
      rt(0) = 0 _8-T?j**   
      Exit Function ma!C:C9#J  
   Else B9$pG  
      '判断斜率存在否 :SWrx MT
 
      If p1x = p3x And p2x <> p4x Then 27,c}OS5o  
         tt = "ac_n_bd_y" 2I& dTxIa  
      ElseIf p1x <> p3x And p2x = p4x Then y>#kT  
         tt = "ac_y_bd_n" og~a*my3  
      ElseIf p1x <> p3x And p2x <> p4x Then 0c1=M|2  
         tt = "ac_y_bd_y" lQ4^I^?m  
      End If :eT\XtxM~{  
    Select Case tt H8B2{]HAt  
         Case "ac_n_bd_y" m1X*I  
            'bd线段方程 Iza;~8dH5  
            k_bd = bdy / bdx s&Al4>}.f  
            b_bd = p2y - k_bd * p2x @ &rf?:  
            p_x = p1x j]`hy"  
            p_y = k_bd * p_x + b_bd bv7xh*/  
         Case "ac_y_bd_n" 'tcve2Tt  
            'ac线段方程 m-+>h:1b|9  
            k_ac = acy / acx VS_\bIC  
            b_ac = p1y - k_ac * p1x ]YfG`0e
K<  
            p_x = p2x b$_qG6)IJO  
            p_y = k_ac * p_x + b_ac j9GKz1
 
        Case "ac_y_bd_y" .*xO/pn  
           'ac，bd线段都要求 7GG`9!l]D  
           k_ac = acy / acx m7RyFnR2  
           b_ac = p1y - k_ac * p1x cKOXsdH?SL  
           k_bd = bdy / bdx 6}0_o[23  
           b_bd = p2y - k_bd * p2x kmo#jITa`  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) (Q ^=^s|  
           p_y = k_ac * p_x + b_ac ?I:_FT  
        End Select .6y*Z+Zg  
      rt(1) = p_x wZbT*rU  
      rt(2) = p_y g\?07@Zd|  
     rc7c$3#X  
'计算最大半径 Eza^Tbq%j?  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) *~cNUyd  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Ov4 [gHy&  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) %[ *+  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) m!!;CbPo  
Dim bb(5) As Single d{) =E8wE  
  bb(1) = rr1 _3O*"S=1  
  bb(2) = rr2 TiZ MY:^  
  bb(3) = rr3 6 OvH"/X4  
  bb(4) = rr4 'MB+cz+v  
  nb = rr1 <
{hB&4oL  
For i = 1 To 4 (2"4PU8  
    If nb <= bb(i) Then H4{7,n  
       nb = bb(i) GukwN]*OY  
    End If B}*\ pdJ  
Next i z|Xt'?9&n  
    rt(0) = Sqr(nb) ,zH\P+*  
    rr = rt() !U(KQ:j  
  End If v&%W*M0q@  
         CDW|cr{  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  jar?"o  

:4COPUBpPV  
有热压工艺方面的人才或者资料分享下； 0nlh0u8#  
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 DFGgyFay  

高手真多！

楼主威武霸气.