[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： ru3nnF_I  
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关键点说几个： Ha$|9li`  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Ee9u7TFT  
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 f|?i6.N>f  
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 )Be}Ev#)Zx  

以下是几个重要的函数： p4<&NMG  
1.判断点在区域中函数 yXc/Nl%  
2.计算夹角函数 `"I^nD^t>Y  
3.转置函数 S`K8e^]
 
4.得到区域中心点，及区域半径函数 [>;U1Wt  
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） M,e_=aq  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 _tb)F"4V  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single
[#)-F_S  
   cax = x2 - x1 $eX; 2  
   cay = y2 - y1 $}aLFb  
   cbx = x2 - x3 /=lrdp!a  
   cby = y2 - y3 +x-n,!(  
   mo_jj = cax * cbx + cay * cby ss236&  
   mo_ca = Sqr(cax * cax + cay * cay) Uj0DX>I  
   mo_cb = Sqr(cbx * cbx + cby * cby) i~n>dc YW  
   cos_acb = mo_jj / (mo_ca * mo_cb) K)sO  
   'ff_cos = cos_acb [US.n+G6  
   If cos_acb >= 1 Then ;?yd;GOt)  
   nn = 0 My:wA;#  
   ElseIf cos_acb <= -1 Then 'd|_i6:y&  
   nn = 3.14159265258979 9@Cqg5Kx'  
   Else IM}#k$vM:  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Ue^upx  
   End If v\c.xtjI5x  
   'ff_angle = nn ?X]7jH<iw;  
   ff_angle = nn * 180 / 3.14159265258979 @PU%BKe  
End Function

'判断点在区域内函数 S$=])^dur  
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 }Rt?p8p  
Dim aob, boc, cod, doa, sum As Single =eDVgOZ)  
  If ppx = p1x And ppy = p1y Then :jT1=PfL  
     point_in = True Hb#8?{  
     Exit Function wg<DV!GZ  
  End If ]Yp;8#:1  
  If ppx = p2x And ppy = p2y Then V'mQ{[{R  
     point_in = True t1 OnA#]/_  
     Exit Function #:v|/2  
  End If E-MEMran4  
   If ppx = p3x And ppy = p3y Then =BMON{K  
     point_in = True {qp XzxV  
     Exit Function *A@~!@XE4  
  End If :;#^h]Q  
     H CZ#7Z  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) xeIt7b?#  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ) 'j7Ra  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ]KA|};>ow  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) =d!3_IZ  
    sum = aob + boc + cod + doa _<+!  
    If 360.01 > sum And sum > 359.99 Then N41)?-7F  
       point_in = True &j<B22t!  
    Else Xa
t>d>nJ]  
       point_in = False kOfbO'O9  
    End If ~dkS-6q~Q  
End Function

'得到点半径,得到交点坐标函数 ,,sKPj[  
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() }R=n!Y$F  
    '求得中心点坐标 M2W4 RovfR  
Dim tt As String ve49m%NQ  
Dim rt(3) As Single &xo_93  
    '判断是否平行 9. 6"C<eYt  
   acx = p3x - p1x 3
+%a  
   acy = p3y - p1y zR_ "  
   bdx = p4x - p2x 3yX^93  
   bdy = p4y - p2y n0bm 'qw  
   If acx * bdy = acy * bdx Then r7+"i9  
      rt(0) = 0
J$F 1sy  
      Exit Function 5Tag-+  
   Else xAbx.\  
      '判断斜率存在否 pX8TzmIB0  
      If p1x = p3x And p2x <> p4x Then Lp.dF)C\  
         tt = "ac_n_bd_y" 9AF%Y:y  
      ElseIf p1x <> p3x And p2x = p4x Then RL4J{4
K  
         tt = "ac_y_bd_n" #Z#rOh  
      ElseIf p1x <> p3x And p2x <> p4x Then mE=%+:o.  
         tt = "ac_y_bd_y" R&KFF'%  
      End If 6hp>w{+  
    Select Case tt ^ >JAl<k  
         Case "ac_n_bd_y" q4=Gj`\43  
            'bd线段方程 6|:K1bI)  
            k_bd = bdy / bdx PvF3a`&r  
            b_bd = p2y - k_bd * p2x c|RT
P  
            p_x = p1x 5, "  
            p_y = k_bd * p_x + b_bd 6Ck 3tCr  
         Case "ac_y_bd_n" h*d1G9%Q1  
            'ac线段方程 pse$S=  
            k_ac = acy / acx ~8:q-m_h  
            b_ac = p1y - k_ac * p1x i]x_W@h  
            p_x = p2x 3N c#6VI  
            p_y = k_ac * p_x + b_ac Gf71udaa  
        Case "ac_y_bd_y" ^%ZbjJ7|j  
           'ac，bd线段都要求 #0$fZ  
           k_ac = acy / acx *ThP->&:(  
           b_ac = p1y - k_ac * p1x /M!b3bmA  
           k_bd = bdy / bdx XX&4OV,^%D  
           b_bd = p2y - k_bd * p2x qJ(XW N H  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) O{^8dwg  
           p_y = k_ac * p_x + b_ac =D;n#n7  
        End Select 3Gi^TXE]  
      rt(1) = p_x $ /`X7a{  
      rt(2) = p_y |ht:_l 8  
     Lmsc~~  
'计算最大半径 DpQ\q;  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) .w,$ TezGP  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) N_wj,yF*  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) B']-4X{SGa  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) EDAtC  
Dim bb(5) As Single 56w uk [)  
  bb(1) = rr1 mHe[ NkY6  
  bb(2) = rr2 VOJA}$  
  bb(3) = rr3 ;n,xu0/  
  bb(4) = rr4 w1Txz4JqB  
  nb = rr1 iq^F?$gFk  
For i = 1 To 4 ibH!bS{  
    If nb <= bb(i) Then KE[!{O^(a  
       nb = bb(i) "hid3"G  
    End If *'w?j)}A9g  
Next i _=Z?5{7S>  
    rt(0) = Sqr(nb) *Xcqnu('  
    rr = rt() dJv2tVm&'  
  End If ~Uw;
6VXV1  
         >piVi[`  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ;*'I&  

t>Ye*eR*`U  
有热压工艺方面的人才或者资料分享下； 
t{g@z3  
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 9

N `WT=  

高手真多！

楼主威武霸气.