[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： X}'rPz\Lu  
3_@IE2dA  
Y"t|0dO%b  

关键点说几个： " :e <a?  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） d0T 8Cwcb  
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 V #vkj  
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 J,v024TM  

以下是几个重要的函数： z
*VK{O)o  
1.判断点在区域中函数 uWMSn
 
2.计算夹角函数 yz3=#  
3.转置函数 0{d)f1  
4.得到区域中心点，及区域半径函数 fvta<  
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） b!-=L&V  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 1e9~):C~W  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single Yx66Xy  
   cax = x2 - x1 |U'`Sc  
   cay = y2 - y1 r0f&n;0U4  
   cbx = x2 - x3 Kl?C[  
   cby = y2 - y3 D1ik*mDA=  
   mo_jj = cax * cbx + cay * cby V~8]ag4  
   mo_ca = Sqr(cax * cax + cay * cay) sWTa;Qi  
   mo_cb = Sqr(cbx * cbx + cby * cby) +u |SX/C  
   cos_acb = mo_jj / (mo_ca * mo_cb) [g@Uc  
   'ff_cos = cos_acb `p)U6J  
   If cos_acb >= 1 Then 1LSD,t|  
   nn = 0 TrgKl2xfx  
   ElseIf cos_acb <= -1 Then N3Q .4? z9  
   nn = 3.14159265258979 2.{zfr  
   Else DgRn^gL{Q  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ~md06"AYJ  
   End If wU/fGg*M2  
   'ff_angle = nn <}xgp[O  
   ff_angle = nn * 180 / 3.14159265258979 :v45Ls4J  
End Function

'判断点在区域内函数 +~==qLsU  
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 Aj/EaIq  
Dim aob, boc, cod, doa, sum As Single l"h6e$dP  
  If ppx = p1x And ppy = p1y Then 7uu\R=$  
     point_in = True V<}chLd,  
     Exit Function Q4L7{^[X  
  End If EKuLt*a/  
  If ppx = p2x And ppy = p2y Then ym` 4v5w  
     point_in = True AnE] kq u  
     Exit Function roi,?B_8  
  End If z X+i2,  
   If ppx = p3x And ppy = p3y Then t3v_o4`&  
     point_in = True gL@]p  
     Exit Function k5}Qx'/l  
  End If y\9#"=+  
     !4z vkJO  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) (6 RWI#  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) @bAuR  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) %Yg|QBm|  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 0\k{v  
    sum = aob + boc + cod + doa '!MKZKer  
    If 360.01 > sum And sum > 359.99 Then tp"eXA0n  
       point_in = True 05jjLM'e  
    Else ?5%o-hB|  
       point_in = False xlsAct:  
    End If z63
y8  
End Function

'得到点半径,得到交点坐标函数 4`o<e)c3  
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() 4l>d^L  
    '求得中心点坐标 ~g@}A  
Dim tt As String uA t{WDHm  
Dim rt(3) As Single m G+=0Rn^  
    '判断是否平行 NE Zu?g  
   acx = p3x - p1x 6y^GMlsI  
   acy = p3y - p1y R`Hy0;X  
   bdx = p4x - p2x Uaj_,qb(  
   bdy = p4y - p2y 6 =G=4{q  
   If acx * bdy = acy * bdx Then aej'cbO  
      rt(0) = 0 e:rbyzf#  
      Exit Function rJRg4Rog  
   Else `9T5Dem|#  
      '判断斜率存在否 /wP2Wnq$  
      If p1x = p3x And p2x <> p4x Then & Yx12B\  
         tt = "ac_n_bd_y" 80o'=E}"  
      ElseIf p1x <> p3x And p2x = p4x Then $(*>]
PC+)  
         tt = "ac_y_bd_n" B;piO-hH  
      ElseIf p1x <> p3x And p2x <> p4x Then 7 Z? Hyv  
         tt = "ac_y_bd_y" 5;HCNwX  
      End If M7&G9SGZ  
    Select Case tt (zk/>Ou  
         Case "ac_n_bd_y" 9E[==2TO  
            'bd线段方程 RU>qj *e  
            k_bd = bdy / bdx F'B0\v=  
            b_bd = p2y - k_bd * p2x _]eyt_  
            p_x = p1x O,NVhU7,  
            p_y = k_bd * p_x + b_bd <jM { <8-  
         Case "ac_y_bd_n" G68@(<
<Z  
            'ac线段方程 MY}K.^4^  
            k_ac = acy / acx #ZP;] W  
            b_ac = p1y - k_ac * p1x 3Y&4yIx  
            p_x = p2x Cbm^: _LR  
            p_y = k_ac * p_x + b_ac B$hog_=s  
        Case "ac_y_bd_y" &rl;
+QS  
           'ac，bd线段都要求 #~.RJ%  
           k_ac = acy / acx Bx5kqHp^1  
           b_ac = p1y - k_ac * p1x OkCAvRg  
           k_bd = bdy / bdx ^r mQMjF  
           b_bd = p2y - k_bd * p2x IcGX~zWr  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) K%Bz6 ~  
           p_y = k_ac * p_x + b_ac ovDPnf(  
        End Select G!h75G20  
      rt(1) = p_x <z>oY2%  
      rt(2) = p_y ZNL+w4  
     KCH`=lX  
'计算最大半径 pUW7
p  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) :-$8u;!M  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) t%<y^Wa=  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) es=OWJt^  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) (vvD<S*  
Dim bb(5) As Single !+QfQghAT  
  bb(1) = rr1 & Y2xO  
  bb(2) = rr2 :M<] 6o  
  bb(3) = rr3 j['B9
vG  
  bb(4) = rr4 k,f/9e+#  
  nb = rr1 gFTlP  
For i = 1 To 4 1X9s\JKQ  
    If nb <= bb(i) Then hhFO,
  
       nb = bb(i) ^Xu4N"@  
    End If LhM$!o?W  
Next i ~P;A 9A(k  
    rt(0) = Sqr(nb)  X>P|-n#  
    rr = rt() gU NWM^n  
  End If TY'61xWi  
         _mwt{D2r}  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  J{Kw@_ypP  

?4Rd4sIM$u  
有热压工艺方面的人才或者资料分享下； }^ ,D~b-nB  
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 6[c|14l  

高手真多！

楼主威武霸气.