[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： ktRGl>J  
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关键点说几个： %mD{rG9  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） yhI;FNSf  
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 LPZ\T}<l  
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 -1~o~yGE  

以下是几个重要的函数： kY6_n4  
1.判断点在区域中函数 o}f$?{)|  
2.计算夹角函数 }W(t>>  
3.转置函数 O(9*
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4.得到区域中心点，及区域半径函数 @?;)x&<8?3  
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） lDF7~N9J_  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 {*r!oD!'  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single <^'IC9D]  
   cax = x2 - x1 LyR<cd$W  
   cay = y2 - y1 \:'6
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   cbx = x2 - x3 -V[!qI  
   cby = y2 - y3 p,uM)LD  
   mo_jj = cax * cbx + cay * cby #XqiXM~^R  
   mo_ca = Sqr(cax * cax + cay * cay) O*x~a;?G  
   mo_cb = Sqr(cbx * cbx + cby * cby) }odjaM}5Nc  
   cos_acb = mo_jj / (mo_ca * mo_cb) AAKc8{  
   'ff_cos = cos_acb .3@Pz]\M#>  
   If cos_acb >= 1 Then %qqeL  
   nn = 0 hJw]hVYa  
   ElseIf cos_acb <= -1 Then tw.z5  
   nn = 3.14159265258979 gS`Z>+V5!c  
   Else AMO{ee7Po  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) %nE%^Enw  
   End If ZP&iy$<L  
   'ff_angle = nn Z:V<P,N  
   ff_angle = nn * 180 / 3.14159265258979 (v:8p!QN  
End Function

'判断点在区域内函数 PGVp1TQ  
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 -Ekf T_  
Dim aob, boc, cod, doa, sum As Single "T<7j.P?  
  If ppx = p1x And ppy = p1y Then J~ +p7S  
     point_in = True
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     Exit Function *YX:e@Fm.a  
  End If KZaiy*
>)  
  If ppx = p2x And ppy = p2y Then zzh7 "M3Qn  
     point_in = True F&3:]1  
     Exit Function =)N6R  
  End If 9(_n8br1  
   If ppx = p3x And ppy = p3y Then ycvgF6Me<  
     point_in = True :!fY;c?  
     Exit Function [biz[fm  
  End If hgwS_L  
     5Fq+^  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Mpk7$=hjc  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) fZJM'+J@A  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) $"}
*#<Z  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) =KD[#au6a  
    sum = aob + boc + cod + doa iU=:YPE+.  
    If 360.01 > sum And sum > 359.99 Then YdB/s1|G  
       point_in = True 62G%.'7  
    Else h=n\c6Q  
       point_in = False (OavgJ+Y  
    End If nvc(<Ovw  
End Function

'得到点半径,得到交点坐标函数 B2WPbox  
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() 9o]!D,u8=5  
    '求得中心点坐标 }wJH@'0+  
Dim tt As String 1:u~T@;" `  
Dim rt(3) As Single gh `_{l  
    '判断是否平行 ,Hp7`I>/  
   acx = p3x - p1x hVJ}
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   acy = p3y - p1y ;rnhv:Iw  
   bdx = p4x - p2x r $YEq5  
   bdy = p4y - p2y ?f!&M  
   If acx * bdy = acy * bdx Then >{Xyl):  
      rt(0) = 0 H6KBXMYO  
      Exit Function n*#HokX  
   Else O>" |5wj  
      '判断斜率存在否  _BCq9/  
      If p1x = p3x And p2x <> p4x Then 1p<*11  
         tt = "ac_n_bd_y" DV*e.Y>  
      ElseIf p1x <> p3x And p2x = p4x Then c s:E^  
         tt = "ac_y_bd_n" wX!0KxR/Z  
      ElseIf p1x <> p3x And p2x <> p4x Then '?3
(&  
         tt = "ac_y_bd_y" |F qujZz  
      End If >]Dn,*R  
    Select Case tt &7{yk$]*  
         Case "ac_n_bd_y" `+0P0(bn  
            'bd线段方程 lcfs 1].  
            k_bd = bdy / bdx EQ"+G[j~x  
            b_bd = p2y - k_bd * p2x R[QBFL<  
            p_x = p1x RS2uk7MB  
            p_y = k_bd * p_x + b_bd !|mzu1S
 
         Case "ac_y_bd_n" vJX0c\e  
            'ac线段方程 w.+G+r=  
            k_ac = acy / acx SI=7$8T5=5  
            b_ac = p1y - k_ac * p1x '+*'sQvH[  
            p_x = p2x ]L3MIaO2T  
            p_y = k_ac * p_x + b_ac &,\my-4c>  
        Case "ac_y_bd_y" {qs>yQ6a:-  
           'ac，bd线段都要求 xlc2,L;i  
           k_ac = acy / acx ws$kwSHq  
           b_ac = p1y - k_ac * p1x f'Oj01[
 
           k_bd = bdy / bdx y3P4]sq  
           b_bd = p2y - k_bd * p2x B f.- 5  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) {CX06BP  
           p_y = k_ac * p_x + b_ac \J-D@b;  
        End Select _Y)Wi[  
      rt(1) = p_x bH%d*  
      rt(2) = p_y E0u&hBd3_  
     I(z16wQ  
'计算最大半径
#f_.  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 3A.lS+P1  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) \9}DAM_  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) [&lH[:Y#  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) "}S6a?]V  
Dim bb(5) As Single &&zsUAkS  
  bb(1) = rr1 j&q%@%Gm  
  bb(2) = rr2 RQ8;_)%  
  bb(3) = rr3 v"_E0 3!  
  bb(4) = rr4 e^N}(Kpy  
  nb = rr1 {??bJRT  
For i = 1 To 4 jZiz 0[  
    If nb <= bb(i) Then h"f_T [  
       nb = bb(i) k/)h@K8@  
    End If h:KEhj\d?  
Next i \4O_@d`A  
    rt(0) = Sqr(nb) vb9C&#  
    rr = rt() Xwd9
-:  
  End If {=;<1PykLb  
         .d?LR
f  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  h\Q@zR*0a  

wuM'M<J@  
有热压工艺方面的人才或者资料分享下； Ul}<@d9: B  
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 NK'@.=$  

高手真多！

楼主威武霸气.