[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： OBj.-jL  
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图片:2.jpg

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关键点说几个： }*?e w  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） )Hw;{5p@  
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 PJb_QL!9  
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 Z1q'4h=F.  

以下是几个重要的函数： `ORDN|s6  
1.判断点在区域中函数 fzSZ>I0R  
2.计算夹角函数 ,g^Bu{?  
3.转置函数 EStHl(DUPq  
4.得到区域中心点，及区域半径函数 s{A-K5S  
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） /$ L;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 3)GXu>) t  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single to,=Q8)0  
   cax = x2 - x1 mflI>J=g  
   cay = y2 - y1 o@;w!'  
   cbx = x2 - x3 Zwq uS9  
   cby = y2 - y3 G#lzB`i  
   mo_jj = cax * cbx + cay * cby d
8Upr1_  
   mo_ca = Sqr(cax * cax + cay * cay) 1eT|  
   mo_cb = Sqr(cbx * cbx + cby * cby) d(
fgv  
   cos_acb = mo_jj / (mo_ca * mo_cb) t,MK#Ko  
   'ff_cos = cos_acb a>s v  
   If cos_acb >= 1 Then A7: oq7b  
   nn = 0 ?k"KZxpT  
   ElseIf cos_acb <= -1 Then yv'mV=BMJ!  
   nn = 3.14159265258979 WgY\m&  
   Else BNzL+"W  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 6"%[s@C  
   End If '^P Ud`  
   'ff_angle = nn \ iP[iE=  
   ff_angle = nn * 180 / 3.14159265258979 VgoQz]z  
End Function

'判断点在区域内函数 [ BN2c  
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 R>Zn$%j\  
Dim aob, boc, cod, doa, sum As Single IkkJ4G  
  If ppx = p1x And ppy = p1y Then 6+LXoR'  
     point_in = True kfmIhHlYQ  
     Exit Function >EMCG.**  
  End If t?c*(?Xa  
  If ppx = p2x And ppy = p2y Then :I&iDS>u1  
     point_in = True 4N
Ek#n  
     Exit Function _$Fi]l!f  
  End If VUx~Y'b  
   If ppx = p3x And ppy = p3y Then SQt$-<>4\  
     point_in = True r2xlcSn%  
     Exit Function Y ,}p  
  End If fc!%W#-  
     hSg:Rqnk  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) (@&|  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) eueXklpg+  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 3K#e]zoI  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 1,pg:=N9  
    sum = aob + boc + cod + doa EIF[e|kZ<  
    If 360.01 > sum And sum > 359.99 Then }f
({03$  
       point_in = True f[ER`!  
    Else $~`(!pa:  
       point_in = False m7!l3W2  
    End If s"Kp+tTWj  
End Function

'得到点半径,得到交点坐标函数 ! q1Ql18n  
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() 7tr.&A^c  
    '求得中心点坐标 N;D+]_;0|  
Dim tt As String W``e6RX-  
Dim rt(3) As Single dm.3.xXq  
    '判断是否平行 :Mt/6}
 
   acx = p3x - p1x |]B]0J#_  
   acy = p3y - p1y ({i|  
   bdx = p4x - p2x w'qV~rN~tc  
   bdy = p4y - p2y w$t2Hd  
   If acx * bdy = acy * bdx Then DSnsi@Mi  
      rt(0) = 0 1yKf=LZ^  
      Exit Function as\V, {<  
   Else UcK!v*3E  
      '判断斜率存在否 XM_S"  
      If p1x = p3x And p2x <> p4x Then Dk7"#q@kx  
         tt = "ac_n_bd_y" f|apk,o_  
      ElseIf p1x <> p3x And p2x = p4x Then )lW<:?k  
         tt = "ac_y_bd_n" z?i82B[Tm  
      ElseIf p1x <> p3x And p2x <> p4x Then N4D_ 43jz  
         tt = "ac_y_bd_y" nDPfr\\  
      End If fmSA.z  
    Select Case tt rFmE6{4:p  
         Case "ac_n_bd_y" {`}RYfZ
 
            'bd线段方程 ?s_q
|d_  
            k_bd = bdy / bdx Q.8Jgel1  
            b_bd = p2y - k_bd * p2x \ oL+O|  
            p_x = p1x kPxrI=  
            p_y = k_bd * p_x + b_bd 4frZ .r;V  
         Case "ac_y_bd_n" ?c43cYb  
            'ac线段方程 JEAqSZak#  
            k_ac = acy / acx
R.RCa$  
            b_ac = p1y - k_ac * p1x 55[K[K  
            p_x = p2x v/m6(z  
            p_y = k_ac * p_x + b_ac lOE
bh  
        Case "ac_y_bd_y" 20Rgw  
           'ac，bd线段都要求 2xjS;lpw  
           k_ac = acy / acx z#-&MJ  
           b_ac = p1y - k_ac * p1x 9wAP%xh  
           k_bd = bdy / bdx S5uV\Y/A  
           b_bd = p2y - k_bd * p2x c[;I\g  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) +^"|FtKhE  
           p_y = k_ac * p_x + b_ac M$?~C~b!*  
        End Select jUfc&bi3  
      rt(1) = p_x yC _X@o-n  
      rt(2) = p_y ;PbyR}s  
     7%F9.h  
'计算最大半径 4e5Ka{# <  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ]V9\4#I4  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) [qb#>P2G3  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) vu*08<M~i|  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Uh7kB`2  
Dim bb(5) As Single lw Kr$X4  
  bb(1) = rr1 H-S28%.  
  bb(2) = rr2 K1$Z=]a+  
  bb(3) = rr3 a1j6-p  
  bb(4) = rr4 &-{4JSII  
  nb = rr1 }2{%V^D)r  
For i = 1 To 4 _-h3>.;h9  
    If nb <= bb(i) Then aFbA=6  
       nb = bb(i) |
fa3;8!96  
    End If 3)`}#`T  
Next i >=B8PK+<  
    rt(0) = Sqr(nb) ;1o"Oij  
    rr = rt() p2cKtk+  
  End If !!P)r1=g  
         %f^TZ,q$  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ~ /]u72?rP  

UoBmS5  
有热压工艺方面的人才或者资料分享下； c]#F^(-A`  
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 \M<C6m5  

高手真多！

楼主威武霸气.