[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： _7<G6q2(  
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关键点说几个： ,{d=<j_  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ?f*>=;7=  
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 \O)u' Bu  
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 uTrQ<|}#  

以下是几个重要的函数： g_?bWm4br  
1.判断点在区域中函数 FYH^axpp  
2.计算夹角函数 hA+;eXy/  
3.转置函数 .jl^"{@6  
4.得到区域中心点，及区域半径函数 LG'1^
W{a  
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） ^+Njz{rpG  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 d4o_/[  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single \>+BvF  
   cax = x2 - x1 `!.c_%m2  
   cay = y2 - y1 ihIRB9  
   cbx = x2 - x3 :KsBJ>2ck  
   cby = y2 - y3 6+Y@dJnPT  
   mo_jj = cax * cbx + cay * cby <9`/Y"\p  
   mo_ca = Sqr(cax * cax + cay * cay) :U-yO 9!j  
   mo_cb = Sqr(cbx * cbx + cby * cby) )T@+"Pw8t  
   cos_acb = mo_jj / (mo_ca * mo_cb) Q#Xa]A-  
   'ff_cos = cos_acb uU1q?|4  
   If cos_acb >= 1 Then kLbo |p"cT  
   nn = 0 <"`P;,S  
   ElseIf cos_acb <= -1 Then N~B'gJJDx  
   nn = 3.14159265258979 v[>8<z8  
   Else I2C1mV  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) #M92=IH  
   End If [bd?$qi  
   'ff_angle = nn 7` t,   
   ff_angle = nn * 180 / 3.14159265258979 k_1oj[O  
End Function

'判断点在区域内函数 vo2TP:  
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 =Lr# *ep[  
Dim aob, boc, cod, doa, sum As Single "`5BAv;u  
  If ppx = p1x And ppy = p1y Then .,SWa;[iB  
     point_in = True `Dv&.  
     Exit Function ]BBjFs4#  
  End If x[2eA!NC  
  If ppx = p2x And ppy = p2y Then &r V  
     point_in = True C-ipxL"r  
     Exit Function uB35CRd  
  End If mOx>p"n  
   If ppx = p3x And ppy = p3y Then 9_pOV%Qs  
     point_in = True [E/8E h<  
     Exit Function #:/-8Z(0  
  End If +#ANc;2g  
    
Ib$
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    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Zh.[f+l]  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) BmFs6{>~c  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) vm"dE4W=  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 1 *$-.  
    sum = aob + boc + cod + doa 0G/_"}@  
    If 360.01 > sum And sum > 359.99 Then q=cH ^`<.  
       point_in = True JU0|pstf  
    Else !u|s|6{\  
       point_in = False ]}dAm S/  
    End If -j"2rIl4#  
End Function

'得到点半径,得到交点坐标函数 kc70HrG  
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() .(2ui~ed  
    '求得中心点坐标 h^"OC$  
Dim tt As String |#-GH$.v  
Dim rt(3) As Single =qVD"Z]z  
    '判断是否平行 dzZ75  
   acx = p3x - p1x rui]_Fn]I  
   acy = p3y - p1y Se %"C&  
   bdx = p4x - p2x ?AJE*=b  
   bdy = p4y - p2y >D/+04w  
   If acx * bdy = acy * bdx Then ar|!iU  
      rt(0) = 0 t@\op}Z-M  
      Exit Function @^kt[$X;  
   Else $N)b6(}F10  
      '判断斜率存在否 96 !e:TU  
      If p1x = p3x And p2x <> p4x Then 3F6=/  
         tt = "ac_n_bd_y" A&6qt  
      ElseIf p1x <> p3x And p2x = p4x Then }~`l!ApD  
         tt = "ac_y_bd_n" h*\/{$y  
      ElseIf p1x <> p3x And p2x <> p4x Then ZJ|'$=lR  
         tt = "ac_y_bd_y" 'VTLp.~G~  
      End If zwJVi9sO  
    Select Case tt ",qJG]_ <  
         Case "ac_n_bd_y" uKocEWB=/F  
            'bd线段方程 !c8hER!  
            k_bd = bdy / bdx APBe76'3)  
            b_bd = p2y - k_bd * p2x $q~:%pQv  
            p_x = p1x /{d
5$(Y"  
            p_y = k_bd * p_x + b_bd W{v-(pW  
         Case "ac_y_bd_n" 1W +QcK4k  
            'ac线段方程 D#G(&<Q  
            k_ac = acy / acx @d86l.=  
            b_ac = p1y - k_ac * p1x Fz4g:8qdA  
            p_x = p2x R s)Nz< d  
            p_y = k_ac * p_x + b_ac #$[}JiuL/  
        Case "ac_y_bd_y" xK3}zN$T  
           'ac，bd线段都要求 x<%V&<z1g  
           k_ac = acy / acx {)d{:&*K.  
           b_ac = p1y - k_ac * p1x fer~NlX  
           k_bd = bdy / bdx J<'I.KZ\z  
           b_bd = p2y - k_bd * p2x d2e4=/A%  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) CsND:m  
           p_y = k_ac * p_x + b_ac `<:D.9vO "  
        End Select *N
#{~  
      rt(1) = p_x #U j~F  
      rt(2) = p_y 0'9zXJ"  
     +(|6Wv  
'计算最大半径
`vFYeN;  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) L'?0*t  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) CAl]Kpc  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) z_LN*u  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) b\O%gg\p%!  
Dim bb(5) As Single ~Z#jIG<?g  
  bb(1) = rr1 b0_Ih6  
  bb(2) = rr2 .s!qf!{V`  
  bb(3) = rr3 :"oQ _bLT  
  bb(4) = rr4 R~R?0aq  
  nb = rr1 7FiQTS B:  
For i = 1 To 4 i#%17}  
    If nb <= bb(i) Then V=v7<I=]  
       nb = bb(i) JBKCa 3  
    End If ZCbnDj  
Next i ,y57tY  
    rt(0) = Sqr(nb) S
EeDq/h  
    rr = rt() oHbG-p  
  End If +w]KK6  
         {yPiBu  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  (^:0g.~c  

w&vZ$n-|  
有热压工艺方面的人才或者资料分享下； wN|;_~h2  
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 yl>V'  

高手真多！

楼主威武霸气.