[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： %M iv8  
8s)b[Z5  
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关键点说几个： Y!L-5|G  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） &G"s!:  
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 q}t]lD %C  
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 OInl?_,,T#  

以下是几个重要的函数： K) }1;  
1.判断点在区域中函数 8NfXYR#  
2.计算夹角函数 }[akj8U  
3.转置函数 @*y4uI6&  
4.得到区域中心点，及区域半径函数 |#_p0yPy  
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） BaQyn 6B  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 N)"8CvQL  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single jkL=JAcf~  
   cax = x2 - x1 Ca'BE#q  
   cay = y2 - y1 v^ ^Ibv  
   cbx = x2 - x3 Es+I]o0K  
   cby = y2 - y3 !CU-5bpu  
   mo_jj = cax * cbx + cay * cby YIRe__7-NU  
   mo_ca = Sqr(cax * cax + cay * cay) &ww-t..  
   mo_cb = Sqr(cbx * cbx + cby * cby) 'd~(=
6J  
   cos_acb = mo_jj / (mo_ca * mo_cb) wnC} TWxX  
   'ff_cos = cos_acb \}Am]Y/ w  
   If cos_acb >= 1 Then CK[8y&  
   nn = 0 NfClR HpVc  
   ElseIf cos_acb <= -1 Then sm`c9[E  
   nn = 3.14159265258979 4MPy}yT*  
   Else *>a=ku:?  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) iF+:j8 b  
   End If Ef`'r))  
   'ff_angle = nn
W^8  
   ff_angle = nn * 180 / 3.14159265258979 8|zavH#P  
End Function

'判断点在区域内函数  ijOp{  
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 [ iTP:8  
Dim aob, boc, cod, doa, sum As Single 2L&c91=wE  
  If ppx = p1x And ppy = p1y Then Z
|C,HF+m.  
     point_in = True /[_aK0U3  
     Exit Function e#/&A5#Ya  
  End If sY!JB7!j  
  If ppx = p2x And ppy = p2y Then Q!q6R^5!K  
     point_in = True 5@5*}[M  
     Exit Function B6dU6"  
  End If $=.%IJ_MAz  
   If ppx = p3x And ppy = p3y Then |Lg2;P7\  
     point_in = True /C8}5)  
     Exit Function 9;LjM ~Ct  
  End If j;.P  
     ]6M<c[H>  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) +\Vw:
~e  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) e$s&B!qJ  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) nx%As  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) ?+EAp"{j  
    sum = aob + boc + cod + doa b[:,p?:@  
    If 360.01 > sum And sum > 359.99 Then iz=cjmV?  
       point_in = True (W h)Ov"  
    Else 
]<<,{IQ  
       point_in = False DyqqY$ vH(  
    End If 1\( N,'h  
End Function

'得到点半径,得到交点坐标函数 d(|?gN^  
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() bhpaC8|  
    '求得中心点坐标 /x@aAJ|
 
Dim tt As String d_we?DZ|  
Dim rt(3) As Single SLEOcOAmD  
    '判断是否平行 SAq.W"ri  
   acx = p3x - p1x L|WrdT D;  
   acy = p3y - p1y \2;!}  
   bdx = p4x - p2x FDgo6x  
   bdy = p4y - p2y oo;<I_#07  
   If acx * bdy = acy * bdx Then Q>4NUq  
      rt(0) = 0 HXT"&c|  
      Exit Function oF$#7#0`;8  
   Else 9]+zZP_#  
      '判断斜率存在否 <O=0^V  
      If p1x = p3x And p2x <> p4x Then Yr{hJGw[  
         tt = "ac_n_bd_y" t
RI<K  
      ElseIf p1x <> p3x And p2x = p4x Then mTsyVji8  
         tt = "ac_y_bd_n" ,ASNa^7/>  
      ElseIf p1x <> p3x And p2x <> p4x Then eV!(a8  
         tt = "ac_y_bd_y" 564L.^$@|  
      End If [5'HlHK  
    Select Case tt xGyl7$J  
         Case "ac_n_bd_y" b;D  
            'bd线段方程 B~]6[Z  
            k_bd = bdy / bdx aPlEM_escS  
            b_bd = p2y - k_bd * p2x d:iJUVpr  
            p_x = p1x .f0qgmIyL  
            p_y = k_bd * p_x + b_bd &-FG}|*4M  
         Case "ac_y_bd_n" (b~l.@xh  
            'ac线段方程 #Hr'plg 8  
            k_ac = acy / acx J>#hu3&UOQ  
            b_ac = p1y - k_ac * p1x @+t|Aa^g  
            p_x = p2x KWDH 35  
            p_y = k_ac * p_x + b_ac P !f{U;B  
        Case "ac_y_bd_y" rD21:1s  
           'ac，bd线段都要求 S-mpob)  
           k_ac = acy / acx Ps.xY;Y  
           b_ac = p1y - k_ac * p1x hN K wQ  
           k_bd = bdy / bdx NV?x<LNWd  
           b_bd = p2y - k_bd * p2x , poc!n//  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) Y[)mHs2  
           p_y = k_ac * p_x + b_ac rAtCG1Vr  
        End Select yCR8c,
'8  
      rt(1) = p_x XK\n
OHLS  
      rt(2) = p_y 3|w$gG;Y  
     wz3X;1l`c  
'计算最大半径 ZDaHR-%Y  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) v/xlb&Xx  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) (M|DNDM'd  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) j~Fd8]@  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) DqY"N]  
Dim bb(5) As Single *=B<S/0  
  bb(1) = rr1 h/A\QW8Sd  
  bb(2) = rr2 ~D5FnN9  
  bb(3) = rr3 IT=y+  
  bb(4) = rr4 &Y@),S9  
  nb = rr1 Y?1T XsvF  
For i = 1 To 4 esZhX)dS  
    If nb <= bb(i) Then E> pr})^w  
       nb = bb(i) v+xrnz  
    End If `D=OEc  
Next i >{(c\oMD  
    rt(0) = Sqr(nb) du}HTrsC  
    rr = rt() CR.d3!&28  
  End If yuC$S&Y>!  
         2HVqJib4Yn  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  zhRF>Y`  

yYk?K<ou  
有热压工艺方面的人才或者资料分享下； A1zV5-E/  
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 6xh-m  

高手真多！

楼主威武霸气.