[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： &+3RsIlW  
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关键点说几个： (\o4 c0UzK  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） q[9N4nj$<  
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 bGkLa/?S  
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 )+ 'r-AF*  

以下是几个重要的函数： 0 /9 C=v  
1.判断点在区域中函数 3hxV`rb  
2.计算夹角函数 Xvoz4'Gme  
3.转置函数 bYZU}Kl;(  
4.得到区域中心点，及区域半径函数 >; tE.
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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） iSUu3Yv,_m  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 OhMJt&s9P=  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single s~bi#U;dF  
   cax = x2 - x1 8Lgm50bs  
   cay = y2 - y1 m OE!`fd  
   cbx = x2 - x3 0igB pHS  
   cby = y2 - y3 ly35n`  
   mo_jj = cax * cbx + cay * cby r;MFVj{  
   mo_ca = Sqr(cax * cax + cay * cay) BvH?d]%  
   mo_cb = Sqr(cbx * cbx + cby * cby) +S[3HX7H  
   cos_acb = mo_jj / (mo_ca * mo_cb) 1
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   'ff_cos = cos_acb IF-y/]  
   If cos_acb >= 1 Then # 5U1F[  
   nn = 0 #HW<@E  
   ElseIf cos_acb <= -1 Then ez.a  
   nn = 3.14159265258979 6GPI gPL,  
   Else mQR9Pn}H  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) A_WaRYG  
   End If 3"< 0_3?W  
   'ff_angle = nn V"'PA-z3  
   ff_angle = nn * 180 / 3.14159265258979 <VQ)}HW;k  
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 ^jUw4Dj~-q  
Dim aob, boc, cod, doa, sum As Single W3d+t?28  
  If ppx = p1x And ppy = p1y Then RPte[tq  
     point_in = True KX7fgC  
     Exit Function Z<^!N)  
  End If vp.?$(L^@/  
  If ppx = p2x And ppy = p2y Then ; :q  
     point_in = True @2a!T03  
     Exit Function 5E"^>z  
  End If Ie(.T2K  
   If ppx = p3x And ppy = p3y Then r 1jt~0&K  
     point_in = True S*|/txE'~Y  
     Exit Function =-X-${/  
  End If o|xZ?#^h  
     |3yG  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) wT6zeEV~*  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) %lWOW2~R  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ..+#~3es#y  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) FVBAB>   
    sum = aob + boc + cod + doa x.wDA3ys  
    If 360.01 > sum And sum > 359.99 Then Up'#OkTx  
       point_in = True
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    Else S\<i`q  
       point_in = False dt,Z^z+"E  
    End If ^]D1':  
End Function

'得到点半径,得到交点坐标函数 |g)>6+?]W  
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() )Hmf=eoc  
    '求得中心点坐标 BLO ]78  
Dim tt As String z]+L=+,,  
Dim rt(3) As Single /OzoeIt  
    '判断是否平行 uW[[8+t|  
   acx = p3x - p1x p^|l ',e  
   acy = p3y - p1y H(K PU1lDw  
   bdx = p4x - p2x 4fC:8\A  
   bdy = p4y - p2y nWY^?e'S  
   If acx * bdy = acy * bdx Then BR@m*JGajz  
      rt(0) = 0 ceJi|`F  
      Exit Function usD@4!PoA  
   Else Pap6JR{7  
      '判断斜率存在否 h )5S4)  
      If p1x = p3x And p2x <> p4x Then (H !iK,R  
         tt = "ac_n_bd_y" !p/?IW+  
      ElseIf p1x <> p3x And p2x = p4x Then E KV[cq  
         tt = "ac_y_bd_n" 9%iQ~   
      ElseIf p1x <> p3x And p2x <> p4x Then !Vw
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         tt = "ac_y_bd_y" QR'#]k;>%  
      End If ;VAyH('~  
    Select Case tt SnmUh~`L~  
         Case "ac_n_bd_y" o25rKC=o  
            'bd线段方程 !h7.xl OpN  
            k_bd = bdy / bdx Gw$5<%sB  
            b_bd = p2y - k_bd * p2x >VkBQM-%  
            p_x = p1x X]D,kKasG  
            p_y = k_bd * p_x + b_bd R8Vf6]s_  
         Case "ac_y_bd_n" pcwYgq#5  
            'ac线段方程 %8tE*3iUF  
            k_ac = acy / acx > ]^'h  
            b_ac = p1y - k_ac * p1x yW=+6@A4  
            p_x = p2x WXY'%G  
            p_y = k_ac * p_x + b_ac WJnGF3G>  
        Case "ac_y_bd_y" }QE*-GVv]  
           'ac，bd线段都要求 X$ZVY2  
           k_ac = acy / acx 7<] EH:9  
           b_ac = p1y - k_ac * p1x IUFc_uL@\  
           k_bd = bdy / bdx F. SB_S<'  
           b_bd = p2y - k_bd * p2x <SI|)M,, 3  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ~EPVu  
           p_y = k_ac * p_x + b_ac yQN{)rv  
        End Select UE.kR+1  
      rt(1) = p_x _o$jk8jOjW  
      rt(2) = p_y bPU i44P  
     QE\ [EI2  
'计算最大半径 Tz,9>uN  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) |2u=3#Jp  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) j,+]tHC-  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) I'BhN#GhX  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) "a8E
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Dim bb(5) As Single K%? g6j  
  bb(1) = rr1 x1.S+:  
  bb(2) = rr2 p/HDG ^T:u  
  bb(3) = rr3 ^U*y*l$  
  bb(4) = rr4 p2i?)+z  
  nb = rr1 WYUDD_m  
For i = 1 To 4 Q,&Li+u|  
    If nb <= bb(i) Then Mz(Vf1pi%  
       nb = bb(i) QkdcW>:a7  
    End If WK>|IgK  
Next i Yg^ &4ZF  
    rt(0) = Sqr(nb) d}[cX9U/  
    rr = rt() -SrZ^  
  End If ;mG*Rad  
         x?+w8jSR  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  %71i&T F  

.uuhoqG0  
有热压工艺方面的人才或者资料分享下； )6OD@<r{  
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 _%w680b'  

高手真多！

楼主威武霸气.