[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： VVHL@  
a`8svo;VUO  
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关键点说几个： z_A34@a  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） /|,:'W%U  
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 )KcY<K  
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 'Jl3%axR  

以下是几个重要的函数： n
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1.判断点在区域中函数 <M M(Z  
2.计算夹角函数 oL*ZfF3  
3.转置函数 W>m#Mz  
4.得到区域中心点，及区域半径函数 G|)fZQ1nS  
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） \zV'YeG  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 uG7ll5Yy  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 'cvc\=p  
   cax = x2 - x1 8M7pc{  
   cay = y2 - y1 6x"|,,&MD0  
   cbx = x2 - x3 G?v]|wdI  
   cby = y2 - y3 0
xpE+GY  
   mo_jj = cax * cbx + cay * cby l5,}yTUta  
   mo_ca = Sqr(cax * cax + cay * cay) T``~YoIdz  
   mo_cb = Sqr(cbx * cbx + cby * cby) ej{7)#  
   cos_acb = mo_jj / (mo_ca * mo_cb) PZSi}j/  
   'ff_cos = cos_acb i`" L?3T  
   If cos_acb >= 1 Then Rb_+C  
   nn = 0 1iIag}?p  
   ElseIf cos_acb <= -1 Then LJmRa  
   nn = 3.14159265258979 Ub<^;Du5  
   Else XOd  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) mKhlYVn  
   End If J7s\  
   'ff_angle = nn .DZ8kKY  
   ff_angle = nn * 180 / 3.14159265258979 iM{UB=C  
End Function

'判断点在区域内函数 DF~{i{  
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 lv0}
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Dim aob, boc, cod, doa, sum As Single D-4\AzIb  
  If ppx = p1x And ppy = p1y Then ro*$OLc/  
     point_in = True p_Y U!j_VE  
     Exit Function qW'5Zk  
  End If ?ZlN$h^  
  If ppx = p2x And ppy = p2y Then [wR x)F"  
     point_in = True L$<(HQQJ8  
     Exit Function JB
vP {5  
  End If _!C'oG6s?  
   If ppx = p3x And ppy = p3y Then #\r5Q
>  
     point_in = True 0@*EwI  
     Exit Function _^cFdP)8|  
  End If Aq"<#:  
     >)`V$x  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) TNK~ETE4  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) CXfPC[o  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ?q+^U>wy&  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 5Bog\mS  
    sum = aob + boc + cod + doa hp)k[|u;  
    If 360.01 > sum And sum > 359.99 Then T*8rR"  
       point_in = True )A H)*Mg  
    Else ? {vY3~  
       point_in = False (L7@ez  
    End If Af{K#R8!  
End Function

'得到点半径,得到交点坐标函数 *{e?%!Q  
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() `L1lGlt  
    '求得中心点坐标 /~B\1  
Dim tt As String M<"H1>q@  
Dim rt(3) As Single !>Ru= $9  
    '判断是否平行 |<Gq^3 2  
   acx = p3x - p1x bTN0n  
   acy = p3y - p1y *dE5yS`H  
   bdx = p4x - p2x G'qGsKf\  
   bdy = p4y - p2y 6}9`z8  
   If acx * bdy = acy * bdx Then 8F*"z^vD=  
      rt(0) = 0  
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      Exit Function m^rrbU+HM?  
   Else a'm\6AW2)  
      '判断斜率存在否 ]t|-  
      If p1x = p3x And p2x <> p4x Then o$FYCz n  
         tt = "ac_n_bd_y" !-gjA@Pk  
      ElseIf p1x <> p3x And p2x = p4x Then s$ v<p(yl  
         tt = "ac_y_bd_n" ubvXpK:.  
      ElseIf p1x <> p3x And p2x <> p4x Then ,V}Vxq3  
         tt = "ac_y_bd_y" !c3li .  
      End If q&`>&k  
    Select Case tt +f- E8q  
         Case "ac_n_bd_y" Sx^4Y\\  
            'bd线段方程 uk)6%  
            k_bd = bdy / bdx AECaX4h+_  
            b_bd = p2y - k_bd * p2x ttaYtV]]  
            p_x = p1x 5o dtYI%L  
            p_y = k_bd * p_x + b_bd [hT|]|fJS;  
         Case "ac_y_bd_n" uY~xHV_-  
            'ac线段方程 {F~:86z(g  
            k_ac = acy / acx lq%6~va  
            b_ac = p1y - k_ac * p1x nB+ e2e&  
            p_x = p2x +@c-:\K%  
            p_y = k_ac * p_x + b_ac P)$q  
        Case "ac_y_bd_y" V%c1+h<  
           'ac，bd线段都要求 wK[Xm'QTPJ  
           k_ac = acy / acx 4H\+vJPM  
           b_ac = p1y - k_ac * p1x HLnizE  
           k_bd = bdy / bdx }1/`<m  
           b_bd = p2y - k_bd * p2x WKwU:im  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) OVE5:)$x  
           p_y = k_ac * p_x + b_ac jdF~0#vH  
        End Select pd1V8PZSG  
      rt(1) = p_x O)4P)KAO<  
      rt(2) = p_y i[wEH1jR  
     /EpsJb`kj  
'计算最大半径 u3>Dvl@  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) [x.DwU%S  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) x$
'0}vnT  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) gqi|k6V/  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) \?X'U:  
Dim bb(5) As Single ,Q5Z<\  
  bb(1) = rr1 %`~?w'  
  bb(2) = rr2 HYkZMVH{  
  bb(3) = rr3 ]1XJQW@gF  
  bb(4) = rr4 u0vq`5L  
  nb = rr1 %O<
qw  
For i = 1 To 4 CAPPOh  
    If nb <= bb(i) Then oNfNe^/T  
       nb = bb(i) 07?|"c.  
    End If [MkXQwY  
Next i # [0>wEq  
    rt(0) = Sqr(nb) o|v_+<zD!  
    rr = rt() mJ3|UClPS  
  End If 0y"Ra%Y  
         ny.YkN2  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  H)s$0Xd  

8H>: C(h  
有热压工艺方面的人才或者资料分享下； (Ut)APM  
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 vKzq7E  

高手真多！

楼主威武霸气.