[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： GUK3`}!%  
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图片:2.jpg

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关键点说几个： IN9o$CZ:  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） zuZlP  
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 ;w}5:3+  
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 eDSBs
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以下是几个重要的函数： d|sI>6jD  
1.判断点在区域中函数 DEC,oX!bI1  
2.计算夹角函数 I1H:h  
3.转置函数 h(G(U_V-Od  
4.得到区域中心点，及区域半径函数 v+=_  
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） O_PC/=m1@  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 $P@P}%2  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single j{P,(-  
   cax = x2 - x1 _H8)O2mJ  
   cay = y2 - y1 o#wF/ I  
   cbx = x2 - x3 sEvJ!$Tt?I  
   cby = y2 - y3 <STjB,_s  
   mo_jj = cax * cbx + cay * cby TCF[i
E{  
   mo_ca = Sqr(cax * cax + cay * cay) X>|.BvY|  
   mo_cb = Sqr(cbx * cbx + cby * cby) 7F'61}qL  
   cos_acb = mo_jj / (mo_ca * mo_cb) R/O_*XY  
   'ff_cos = cos_acb 73.o{V  
   If cos_acb >= 1 Then r%'2a+}D  
   nn = 0 W3 8=fyD  
   ElseIf cos_acb <= -1 Then xD1B50y U  
   nn = 3.14159265258979 D1O7S]j  
   Else ?j
0blXl  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) tXKhkt`  
   End If ccm <rZ7  
   'ff_angle = nn WuGm~<NS  
   ff_angle = nn * 180 / 3.14159265258979 h=4{.EegG&  
End Function

'判断点在区域内函数 S5Px9&N8(  
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 W'0wTZG  
Dim aob, boc, cod, doa, sum As Single (I~,&aBr  
  If ppx = p1x And ppy = p1y Then )sS<%Xf  
     point_in = True [7s5Vt|  
     Exit Function Ixec]UOS  
  End If #uXOyiE  
  If ppx = p2x And ppy = p2y Then w\2[dd  
     point_in = True Om1z  
     Exit Function Vi?Z`G]w!  
  End If ~IWi@m{  
   If ppx = p3x And ppy = p3y Then W>Rv  
     point_in = True
vo(?[[  
     Exit Function <m6I)}K  
  End If 25~$qY_  
     Ph%s.YAZ~  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 0'~b<>G%  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Uq+ _#{2(  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) mpF_+Mn  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 2E1TJ.[BS  
    sum = aob + boc + cod + doa q-3KF  
    If 360.01 > sum And sum > 359.99 Then jN<]yhqf  
       point_in = True 2b"5/$|6  
    Else !KlSw,&=.6  
       point_in = False JX/d;N7a  
    End If &4%J35~  
End Function

'得到点半径,得到交点坐标函数 %i "  
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() <EUSl|6  
    '求得中心点坐标 !?>)[@2 k6  
Dim tt As String U`Ag|R  
Dim rt(3) As Single E9:hK  
    '判断是否平行 2r0!h98  
   acx = p3x - p1x Rp|&1nS  
   acy = p3y - p1y &sgwY  
   bdx = p4x - p2x :V2Q n-N  
   bdy = p4y - p2y 4|L@oTzx  
   If acx * bdy = acy * bdx Then {.OoOqq9  
      rt(0) = 0 _Kj.  
      Exit Function \xZBu"  
   Else Ny'v/+nQ  
      '判断斜率存在否 ~.lH)  
      If p1x = p3x And p2x <> p4x Then DQICD.X6R  
         tt = "ac_n_bd_y" >PVi 3S  
      ElseIf p1x <> p3x And p2x = p4x Then bLzuaNa'  
         tt = "ac_y_bd_n" #G=QL(f>/  
      ElseIf p1x <> p3x And p2x <> p4x Then 6V?RES;X  
         tt = "ac_y_bd_y" 7jbmw<d)9  
      End If 1c"m$)a4  
    Select Case tt h3IkOh4|h  
         Case "ac_n_bd_y" eM"mP&TTL  
            'bd线段方程 R"o,m  
            k_bd = bdy / bdx @]tGfr;le&  
            b_bd = p2y - k_bd * p2x $Ig,cTR.b  
            p_x = p1x nQHd\/B  
            p_y = k_bd * p_x + b_bd -c?wEqa~2  
         Case "ac_y_bd_n" wg.fo:Q  
            'ac线段方程 n1>nnH]G  
            k_ac = acy / acx ')-(N um  
            b_ac = p1y - k_ac * p1x 7uxPkZbb  
            p_x = p2x [\ YP8^..  
            p_y = k_ac * p_x + b_ac ({VBp[Mh  
        Case "ac_y_bd_y" ^z;,deoGh  
           'ac，bd线段都要求 hF7mJ\  
           k_ac = acy / acx ZcRm5Du~:  
           b_ac = p1y - k_ac * p1x xm0#4GFUS  
           k_bd = bdy / bdx
Nt-SCLDM  
           b_bd = p2y - k_bd * p2x XL=R]IC<.  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) cgeS)C7  
           p_y = k_ac * p_x + b_ac U3K<@r  
        End Select L)'rM-nkFh  
      rt(1) = p_x mVAm^JK  
      rt(2) = p_y 3a}`xCO5  
     3F}KrG  
'计算最大半径 'm5(MC,  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) PjW+V`  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 'f7 *RSKqb  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) .l5"X>  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) xBfe8lor  
Dim bb(5) As Single U hhmG+  
  bb(1) = rr1 0_mvz%[J  
  bb(2) = rr2 -+>r4P  
  bb(3) = rr3 b]&zDo|8  
  bb(4) = rr4 0P40K  
  nb = rr1 cu`J2vm3  
For i = 1 To 4 H8]^f=  
    If nb <= bb(i) Then ,Z7Z!.TY!  
       nb = bb(i) .^IhH|U  
    End If ]
N"F?3J 8  
Next i 4 6lEJ  
    rt(0) = Sqr(nb) *Yu\YjLPG  
    rr = rt() xyjVdD\  
  End If )B$P#dP)i  
         x0h3jw+6  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  >nhE%:X>  

!b7'>b'J<1  
有热压工艺方面的人才或者资料分享下； Y%/ YFO2vb  
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 TmYP_5g:  

高手真多！

楼主威武霸气.