[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： %}z/_QZ  
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关键点说几个： (vIrXF5Dnj  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） =goZI67  
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 MDkIaz\U  
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 .js4
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以下是几个重要的函数： Vvx(7p-GQ  
1.判断点在区域中函数 <$.KCLP  
2.计算夹角函数 XA])<dZ  
3.转置函数 ^v3+w"2  
4.得到区域中心点，及区域半径函数 ]P0DPea  
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） S&-sl
  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 kyJv,!};  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single K! /E0G&  
   cax = x2 - x1 \Y9=dE}  
   cay = y2 - y1 9[N'HpQ3  
   cbx = x2 - x3 SU# S'  
   cby = y2 - y3 @n(=#Q3  
   mo_jj = cax * cbx + cay * cby G%YD2<V  
   mo_ca = Sqr(cax * cax + cay * cay) =Ak>2  
   mo_cb = Sqr(cbx * cbx + cby * cby) JXj`  
   cos_acb = mo_jj / (mo_ca * mo_cb) !w f N~.Y  
   'ff_cos = cos_acb MC#bo{Bq3-  
   If cos_acb >= 1 Then  1,PFz  
   nn = 0 mQ%kGqs  
   ElseIf cos_acb <= -1 Then (I.uQP~H  
   nn = 3.14159265258979 C>68$wd>  
   Else H@IX$+;z  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) nE-=7S L  
   End If @=wAk5[IN  
   'ff_angle = nn B_cn[?M  
   ff_angle = nn * 180 / 3.14159265258979 #bu`W
!p}  
End Function

'判断点在区域内函数 [RpFC4W  
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 tDN-I5q  
Dim aob, boc, cod, doa, sum As Single 3C,e>zE}  
  If ppx = p1x And ppy = p1y Then N_0&3PUSM  
     point_in = True #gN{8Yk>  
     Exit Function XVv7W5/q]  
  End If VDnAQ[T@d  
  If ppx = p2x And ppy = p2y Then KktTR`W  
     point_in = True !Rb7q{@>  
     Exit Function Kv#daAU  
  End If j|aT`UH03  
   If ppx = p3x And ppy = p3y Then  Mxr#  
     point_in = True jilO%  "  
     Exit Function rkD4}jV  
  End If t*}<v@,  
     [2\`Wh:%P  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) T@Q<oNU  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) G,"$Erx  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) A`N;vq,  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ]`4QJ;#  
    sum = aob + boc + cod + doa gdG
: &{|x  
    If 360.01 > sum And sum > 359.99 Then r*p%e\ 3  
       point_in = True 3:;%@4f  
    Else gSe{S  
       point_in = False l%w7N9  
    End If F 1zc4l6  
End Function

'得到点半径,得到交点坐标函数 R;.WOies4  
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() Q
V 'y6m\  
    '求得中心点坐标 ./g#<  
Dim tt As String hBqu,A  
Dim rt(3) As Single y(zU:.  
    '判断是否平行 Q?;ntzi  
   acx = p3x - p1x z"vgwOP su  
   acy = p3y - p1y =N0cz%  
   bdx = p4x - p2x jXDo!a|4y  
   bdy = p4y - p2y K*}j1A  
   If acx * bdy = acy * bdx Then vVf!XZF  
      rt(0) = 0 V9bLm,DtT  
      Exit Function r 1a{Y8?  
   Else yTvK)4&  
      '判断斜率存在否 Oxvw`a#  
      If p1x = p3x And p2x <> p4x Then #3$|PM7,_  
         tt = "ac_n_bd_y" 1&As:kv5I  
      ElseIf p1x <> p3x And p2x = p4x Then >k jJq]A2  
         tt = "ac_y_bd_n" Dm^kuTIG  
      ElseIf p1x <> p3x And p2x <> p4x Then "O 'I  
         tt = "ac_y_bd_y" +]zP $5_e  
      End If 6qDD_:F  
    Select Case tt %jf gncW  
         Case "ac_n_bd_y" 'ng/A4  
            'bd线段方程 od fu7P_  
            k_bd = bdy / bdx _L72Ae(_  
            b_bd = p2y - k_bd * p2x .KSGma6]  
            p_x = p1x [P,nW/H  
            p_y = k_bd * p_x + b_bd cA\W|A)  
         Case "ac_y_bd_n" Dw[Q,SE  
            'ac线段方程 1mV0AE538  
            k_ac = acy / acx `ouzeu9}  
            b_ac = p1y - k_ac * p1x 5`DH\VD.j  
            p_x = p2x E;Hjw0M'k  
            p_y = k_ac * p_x + b_ac jdp:G  
        Case "ac_y_bd_y" Jp#cFUa t  
           'ac，bd线段都要求 A%O#S<sa  
           k_ac = acy / acx iy"Kg]  
           b_ac = p1y - k_ac * p1x e-CW4x  
           k_bd = bdy / bdx iD`XD\.?  
           b_bd = p2y - k_bd * p2x Sx"I]N
  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 1hWz%c|  
           p_y = k_ac * p_x + b_ac 9 JtG&^*  
        End Select *2MTx  
      rt(1) = p_x A&'%ou  
      rt(2) = p_y dp70sA!JF  
     PsnU5f)`  
'计算最大半径 -tdG}Gu  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) _@;N<$&  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) k N+(  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) WGx>{'LJ  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) '1 $({{R  
Dim bb(5) As Single ||HIp9(3  
  bb(1) = rr1 zJ`(LnV  
  bb(2) = rr2 buXG32;  
  bb(3) = rr3 6f!mk:\T.  
  bb(4) = rr4 h_L '_*  
  nb = rr1 cg%CYV)  
For i = 1 To 4 h)vTu%J:  
    If nb <= bb(i) Then ~B@o?8D]  
       nb = bb(i) :bDA<B6bb  
    End If j[cjQ]>~'  
Next i m5
X=P5U  
    rt(0) = Sqr(nb) 9iCud6H,h  
    rr = rt() EYG E#C; d  
  End If X%CPz.G  
         2A|6o*s"  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  -f|^}j?  

+u
:OAsR  
有热压工艺方面的人才或者资料分享下； >1pH 91c'  
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 .x?zky^
 

高手真多！

楼主威武霸气.