[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： C{G=Y[?oc  
=JPY{'VO  
60e{]}Z  

关键点说几个： 3KkJQ5a  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） gA1j'!\6l9  
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 0lOan  
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 QC]<`!  

以下是几个重要的函数： JLu$UR4  
1.判断点在区域中函数 6-5{7E}/b  
2.计算夹角函数 od,,2pwK+  
3.转置函数 rF{,]U9`  
4.得到区域中心点，及区域半径函数 XC}2GHO<  
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） WigTNg4  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 *kj+6`:CPs  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single c@j3L23B  
   cax = x2 - x1 LJ z6)kz  
   cay = y2 - y1 w-@6qMJ  
   cbx = x2 - x3 ir|L@Jj,  
   cby = y2 - y3 lX50JJwk  
   mo_jj = cax * cbx + cay * cby IkGM~3e  
   mo_ca = Sqr(cax * cax + cay * cay) oIE3`\xS  
   mo_cb = Sqr(cbx * cbx + cby * cby) 1n.F`%YG  
   cos_acb = mo_jj / (mo_ca * mo_cb) ^0
I"  
   'ff_cos = cos_acb ChNT;G<6$  
   If cos_acb >= 1 Then 6]HMhv  
   nn = 0 -&%! 4(Je  
   ElseIf cos_acb <= -1 Then ]4lC/&nm  
   nn = 3.14159265258979 K&-uW_0  
   Else yVpru8+eD  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 9sv#TT5V  
   End If .i#'IS0c  
   'ff_angle = nn UZ:z|a3  
   ff_angle = nn * 180 / 3.14159265258979 $o)}@TC  
End Function

'判断点在区域内函数 6y{CM/DC  
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 3A! |M5  
Dim aob, boc, cod, doa, sum As Single .rlLt5b%  
  If ppx = p1x And ppy = p1y Then "837b/>/  
     point_in = True YYe=
E,q  
     Exit Function 8>I4e5Ym  
  End If ^i@0P}K<  
  If ppx = p2x And ppy = p2y Then \@{TF((Y  
     point_in = True [mG!-
.ll  
     Exit Function hw B9N  
  End If O`9vEovjs  
   If ppx = p3x And ppy = p3y Then @ykl:K%ke  
     point_in = True =W gzj|Kr  
     Exit Function hSj@<#b>F  
  End If S++jwP  
     owA.P-4  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) TCkMJs?  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) *3fhVl=8^*  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) {!1Rl
W  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) >YcaFnY  
    sum = aob + boc + cod + doa ahN8IV=+Gm  
    If 360.01 > sum And sum > 359.99 Then Y7')~C`up^  
       point_in = True 4S* X=1  
    Else 8 9maN  
       point_in = False ]r\!Z <<(  
    End If PJ<9T3Fa  
End Function

'得到点半径,得到交点坐标函数 NLt"yD3t  
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() E<@N4%K_Q  
    '求得中心点坐标 R}D[ z7  
Dim tt As String ]\/"-Y#4Q  
Dim rt(3) As Single /^WOrMR  
    '判断是否平行 oE,TA2  
   acx = p3x - p1x tF.N  
   acy = p3y - p1y ~1nKL0C6u  
   bdx = p4x - p2x 64Tb,AL_  
   bdy = p4y - p2y :OA;vp~$x  
   If acx * bdy = acy * bdx Then -U|Z9sia  
      rt(0) = 0 +DE;aGQ.z?  
      Exit Function $dsLU5]1o  
   Else 00yWk_w  
      '判断斜率存在否 Qve5qJ  
      If p1x = p3x And p2x <> p4x Then n8i: /ypB  
         tt = "ac_n_bd_y" D/
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[_  
      ElseIf p1x <> p3x And p2x = p4x Then b&RsxW7  
         tt = "ac_y_bd_n" 02-% B~oP  
      ElseIf p1x <> p3x And p2x <> p4x Then vTC{  
         tt = "ac_y_bd_y" k+hl6$:Qj%  
      End If }-Jo9dNs  
    Select Case tt t~":'le`zr  
         Case "ac_n_bd_y" C)QKodI  
            'bd线段方程 h\+8eeIl  
            k_bd = bdy / bdx lcVG<*gf-  
            b_bd = p2y - k_bd * p2x ;s+3#Py  
            p_x = p1x Af}o/g  
            p_y = k_bd * p_x + b_bd {4)d  
         Case "ac_y_bd_n" i9T<(sdK+  
            'ac线段方程 {e0(M*u  
            k_ac = acy / acx $Z8riVJ7j-  
            b_ac = p1y - k_ac * p1x ^UFNds'q  
            p_x = p2x .9UrWBW\I  
            p_y = k_ac * p_x + b_ac ]2A2<Q_,  
        Case "ac_y_bd_y" U
U#tm  
           'ac，bd线段都要求 sH]T1z  
           k_ac = acy / acx ,V{Bpr  
           b_ac = p1y - k_ac * p1x }nSu7)3$B  
           k_bd = bdy / bdx ~(:0&w%e  
           b_bd = p2y - k_bd * p2x s|X_:3\x  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) PzustC|  
           p_y = k_ac * p_x + b_ac r~2q`l'>  
        End Select ";DozPU  
      rt(1) = p_x p[)yn%uh  
      rt(2) = p_y TV`sqKW  
      ^mN`!+  
'计算最大半径 b1%w+*d<z  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) \[%_ :9eq  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) !/X>k{  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) dV-6l6  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) PH'n`
D
#  
Dim bb(5) As Single +RnWeBXAT
 
  bb(1) = rr1 6P)DM  
  bb(2) = rr2 *^C
N2tm  
  bb(3) = rr3 ~yA^6[a=  
  bb(4) = rr4 Bj\Us$cZ  
  nb = rr1 "~Zdv}^xS  
For i = 1 To 4 P,rLyx  
    If nb <= bb(i) Then Mhc5<~?  
       nb = bb(i) }9FWtXAU^1  
    End If x'SIHV4M@Q  
Next i wNUcL*n  
    rt(0) = Sqr(nb) ezri9\Ju  
    rr = rt() 5JhpBx/>o=  
  End If w{N8Y~O  
         9fOE.  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  TaKCN  

.RS  
有热压工艺方面的人才或者资料分享下； ]*0t?'go'  
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 +RK/u  

高手真多！

楼主威武霸气.