[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： _Iy)p{y  
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关键点说几个： S2I{?y&K  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） JDpW7OrDc  
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 >4lA+1JYk  
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 ?6[u\V  

以下是几个重要的函数： Wf  *b"#  
1.判断点在区域中函数 y?s#pSX;N  
2.计算夹角函数 nR?m,J  
3.转置函数 4d]T`  
4.得到区域中心点，及区域半径函数 u $T'#p1  
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） aQfrDM<*XS  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ?)#}Nj<R  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ,n?oNU  
   cax = x2 - x1 owc#RW9 7  
   cay = y2 - y1 7L&=z$U@m  
   cbx = x2 - x3 U ()36  
   cby = y2 - y3 6~0.YZ9  
   mo_jj = cax * cbx + cay * cby 2s@<k1EdPl  
   mo_ca = Sqr(cax * cax + cay * cay) h"G#} C]  
   mo_cb = Sqr(cbx * cbx + cby * cby) +V6N/{^5  
   cos_acb = mo_jj / (mo_ca * mo_cb) $u./%JS  
   'ff_cos = cos_acb ,0=:06l  
   If cos_acb >= 1 Then <ibEo98  
   nn = 0 n +z5;'my  
   ElseIf cos_acb <= -1 Then thj
CfP  
   nn = 3.14159265258979 Cuq=>J  
   Else Y_49UtJIg  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) z@3t>k|
K  
   End If bytAdS$3  
   'ff_angle = nn 2!b+}+:  
   ff_angle = nn * 180 / 3.14159265258979 Pp[?E.]P  
End Function

'判断点在区域内函数 #?Z>o16,u  
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 }0Qex=vkO  
Dim aob, boc, cod, doa, sum As Single 9""e*-;Mi  
  If ppx = p1x And ppy = p1y Then 0m^(|=N-  
     point_in = True ~e5hfZv|w  
     Exit Function [kIiKLX  
  End If Gvk)H$ni  
  If ppx = p2x And ppy = p2y Then 1o. O]>  
     point_in = True Fcc\hV;  
     Exit Function lU0'5!3R,  
  End If i"~J -{d}  
   If ppx = p3x And ppy = p3y Then |gW>D=rkj  
     point_in = True 0w
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     Exit Function WKib$(%f6  
  End If /d*0+m8  
     ) N*,cTE  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) gwj+~vSfi  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y)
eot]VO:  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) _H9.AI  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) v"VpE`
z1#  
    sum = aob + boc + cod + doa ~.?,*q7  
    If 360.01 > sum And sum > 359.99 Then [eebIJs  
       point_in = True Z6eM~$Y  
    Else fD<9k  
       point_in = False ?8AchbK;N  
    End If u:Fa1 !4JR  
End Function

'得到点半径,得到交点坐标函数 4PtRTb0<i3  
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() I8R#EM%C#  
    '求得中心点坐标 jlvh'y`  
Dim tt As String V2As 5  
Dim rt(3) As Single I!FIV^}Z(  
    '判断是否平行 eD4D<\*  
   acx = p3x - p1x 'MLp*3djF,  
   acy = p3y - p1y $T.uIq  
   bdx = p4x - p2x u^HC1r|%  
   bdy = p4y - p2y |]--sUx:  
   If acx * bdy = acy * bdx Then h$p]M^Z7  
      rt(0) = 0 gD}lDK6N  
      Exit Function >Q5et1c  
   Else z TYHwx  
      '判断斜率存在否 rC`pTN  
      If p1x = p3x And p2x <> p4x Then K/xn4N_UX  
         tt = "ac_n_bd_y" 0&M~lJ  
      ElseIf p1x <> p3x And p2x = p4x Then ,X+LJe$  
         tt = "ac_y_bd_n" {)V!wSi  
      ElseIf p1x <> p3x And p2x <> p4x Then S#h-X(4  
         tt = "ac_y_bd_y" *0vq+C  
      End If >6Y@8 )  
    Select Case tt ,z4)A&F[c;  
         Case "ac_n_bd_y" ~quof>  
            'bd线段方程 6pJFrWe{  
            k_bd = bdy / bdx  |2<y  
            b_bd = p2y - k_bd * p2x WP5cC@x  
            p_x = p1x |/^ KFY"  
            p_y = k_bd * p_x + b_bd G>siyUh  
         Case "ac_y_bd_n" 2IfcdYG  
            'ac线段方程 F9ytU>zh  
            k_ac = acy / acx e}f#dR+(  
            b_ac = p1y - k_ac * p1x s2Z'_rT  
            p_x = p2x olm0O (9  
            p_y = k_ac * p_x + b_ac =Msr+P9Ai  
        Case "ac_y_bd_y" qQ&=Z`p!  
           'ac，bd线段都要求 `$PdI4~J  
           k_ac = acy / acx ]A?(OA  
           b_ac = p1y - k_ac * p1x 0tz7^:|D  
           k_bd = bdy / bdx GZefeBi  
           b_bd = p2y - k_bd * p2x ke2zxX2f  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) s9#WkDR  
           p_y = k_ac * p_x + b_ac e1<9:h+  
        End Select ~ 3!yd0[k  
      rt(1) = p_x YCPU84f  
      rt(2) = p_y 1tZ7%0R\g]  
     Z;ze{Vb  
'计算最大半径 ^;
8dl.;  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ylGT9G19  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) B~?R 6  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) "]SA4Ud^  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) $)YalZ  
Dim bb(5) As Single SO|!x}GfI  
  bb(1) = rr1 q1^bH6*fl  
  bb(2) = rr2 dDg[ry  
  bb(3) = rr3 YD9|2S!G  
  bb(4) = rr4 q!10G  
  nb = rr1 c9ye[81  
For i = 1 To 4 _^Z v[P  
    If nb <= bb(i) Then QbJE+m5  
       nb = bb(i) R@df~  
    End If m2a[E0  
Next i XQ'$J_hC  
    rt(0) = Sqr(nb)
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    rr = rt() P7 h^!a/  
  End If mI,a2wqi  
         F
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End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  hG}
gKs  

y,6KU$G  
有热压工艺方面的人才或者资料分享下； It]GlxM
X  
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 `[h&Q0Du6  

高手真多！

楼主威武霸气.