[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： _TPo=}Z  
hYd8}BvA  
'c$9[|x  

关键点说几个： 8S02 3  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） a;S^<8  
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 P~qVr#eU  
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 kTk?[BK  

以下是几个重要的函数： *=7[Ip<X  
1.判断点在区域中函数 8 Kk
pXaz  
2.计算夹角函数 )g --=w3  
3.转置函数 72,iRH  
4.得到区域中心点，及区域半径函数 I>5@s;  
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） \fz j fZ1n  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 CN=&Je%I  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single *[5  
   cax = x2 - x1 *02( J  
   cay = y2 - y1 m#nxw  
   cbx = x2 - x3 vOK;l0%  
   cby = y2 - y3 =eqI]rVj^  
   mo_jj = cax * cbx + cay * cby i4I0oRp  
   mo_ca = Sqr(cax * cax + cay * cay) _6m3$k_[MJ  
   mo_cb = Sqr(cbx * cbx + cby * cby) S
>,I&`yi  
   cos_acb = mo_jj / (mo_ca * mo_cb) 3I5WD
uq  
   'ff_cos = cos_acb X4$e2f  
   If cos_acb >= 1 Then 2f!oA~|2  
   nn = 0 RNdnlD#P  
   ElseIf cos_acb <= -1 Then Wn^^Q5U#  
   nn = 3.14159265258979  /Xz4q!Ul  
   Else V8yX7yx  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) B0i}Y-Z  
   End If >y9o&D  
   'ff_angle = nn ElXe=5L\#  
   ff_angle = nn * 180 / 3.14159265258979 AuTplO0_rE  
End Function

'判断点在区域内函数 C/waH[Yzan  
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 ]7t\%_  
Dim aob, boc, cod, doa, sum As Single DH9?2)aR  
  If ppx = p1x And ppy = p1y Then 0xUj#)  
     point_in = True l :Nxl  
     Exit Function xD#I&.  
  End If f#kevf9zc  
  If ppx = p2x And ppy = p2y Then G=cH61  
     point_in = True %GbPrlu  
     Exit Function )[sO5X7'^  
  End If )_e"Nd4  
   If ppx = p3x And ppy = p3y Then T(UYlLe  
     point_in = True 1K9?a;.  
     Exit Function }pnFJ  
  End If M5kHD]b  
     W 'a~pB1I  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) WlQ=CRY  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) KOEi_9i}  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) Z034wn\N  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ev%
t5NZ  
    sum = aob + boc + cod + doa K4/P(*r`  
    If 360.01 > sum And sum > 359.99 Then 0^.4eX:E_  
       point_in = True Vfm #UvA  
    Else J+
ZdZa}Ob  
       point_in = False tc<M]4-  
    End If $a*Q).^  
End Function

'得到点半径,得到交点坐标函数 cvV?V\1f  
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() x]><}!\<&  
    '求得中心点坐标 2<o[@w  
Dim tt As String |z|)r"*\4  
Dim rt(3) As Single f9
3rY<  
    '判断是否平行 0tm_}L$g=b  
   acx = p3x - p1x Sd$]b>b4O  
   acy = p3y - p1y m)|.:sj  
   bdx = p4x - p2x FHNuMdFn  
   bdy = p4y - p2y 2PP-0 E  
   If acx * bdy = acy * bdx Then hW!@$Ph  
      rt(0) = 0 EM54  
      Exit Function }:9|*m<$t  
   Else yp2'KES>  
      '判断斜率存在否 ds$\vSd  
      If p1x = p3x And p2x <> p4x Then v(@+6#&  
         tt = "ac_n_bd_y" W3{<e"  
      ElseIf p1x <> p3x And p2x = p4x Then C+(Gg^ w  
         tt = "ac_y_bd_n" t:"=]zUU  
      ElseIf p1x <> p3x And p2x <> p4x Then Z_V&IQo-7  
         tt = "ac_y_bd_y" #!=>muZt  
      End If
4`!  
    Select Case tt ^,Y~M_=  
         Case "ac_n_bd_y" $,&gAU  
            'bd线段方程 5lHN8k=mm2  
            k_bd = bdy / bdx kLPO+lg+  
            b_bd = p2y - k_bd * p2x AY/-j$5+?  
            p_x = p1x xL39>P
B  
            p_y = k_bd * p_x + b_bd \/'#=q1  
         Case "ac_y_bd_n" V:G}=~+=  
            'ac线段方程 uWR,6\_jY  
            k_ac = acy / acx t=W$'*P0}  
            b_ac = p1y - k_ac * p1x kf
^-m/  
            p_x = p2x i^sDh>$J  
            p_y = k_ac * p_x + b_ac [Z5}2gB&  
        Case "ac_y_bd_y" g3|Y$/J7P  
           'ac，bd线段都要求 'x45E.wYw  
           k_ac = acy / acx /[nZ#zj!3  
           b_ac = p1y - k_ac * p1x # McK46B z  
           k_bd = bdy / bdx n$m]58w  
           b_bd = p2y - k_bd * p2x SD|4ybK>d  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 9-a2L JI  
           p_y = k_ac * p_x + b_ac ^aD
/ .  
        End Select J]|6l/i  
      rt(1) = p_x $ g

r6  
      rt(2) = p_y `hK>bHj  
     ek(kY6x:  
'计算最大半径 QSn;a 4f  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) anz9lGG#  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ]U#[\ Z  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ?HEtrX,q  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) hk"9D<&i>b  
Dim bb(5) As Single &3 XFgHo  
  bb(1) = rr1 " g0-u(Y  
  bb(2) = rr2 `u p-m=zA  
  bb(3) = rr3 - 5o<Q'(  
  bb(4) = rr4 ^
:cb $9F  
  nb = rr1 o&hKg#nO83  
For i = 1 To 4 '.%iPMM  
    If nb <= bb(i) Then _>jrlIfc  
       nb = bb(i) A"\P&kqMV  
    End If t-eKruj+  
Next i AT%* ~tr  
    rt(0) = Sqr(nb) cwM#X;FGq  
    rr = rt() xJ=ZQ)&]  
  End If =qV4Sje|q  
         Cz=A{<^g  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ~mN g[]  

f|- m ^/y  
有热压工艺方面的人才或者资料分享下； @IEI%vH  
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 U>/<6Wd  

高手真多！

楼主威武霸气.