[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： {j6$'v)0  
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关键点说几个： P{LS +.  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） `_k_}9Fr  
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 /Y=_EOS  
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 GorEHlvVh  

以下是几个重要的函数： W__Y^\~  
1.判断点在区域中函数 Ee_?aG e&  
2.计算夹角函数 r$v\\^?2  
3.转置函数 >k ==7#P  
4.得到区域中心点，及区域半径函数 G1-r$7\  
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） ^OV!Q\j.q  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 }.(DQwC}1k  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single MQDLC7Y.p5  
   cax = x2 - x1 qRgFVX+vc  
   cay = y2 - y1 '4It>50b  
   cbx = x2 - x3  _X  
   cby = y2 - y3 "Bv V8
9  
   mo_jj = cax * cbx + cay * cby fN@ZJ~F%j  
   mo_ca = Sqr(cax * cax + cay * cay) \[qxOZ{  
   mo_cb = Sqr(cbx * cbx + cby * cby) ~+d{:WY  
   cos_acb = mo_jj / (mo_ca * mo_cb) #eN2{G=4+  
   'ff_cos = cos_acb CzY18-L@EX  
   If cos_acb >= 1 Then TV0sxod6  
   nn = 0 t^Lb}A#$4  
   ElseIf cos_acb <= -1 Then q sUBvq  
   nn = 3.14159265258979 #6 ni~d&0  
   Else m]*a;a'}#  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) &^K(9"  
   End If #'},/Lm@  
   'ff_angle = nn =>lX brJ  
   ff_angle = nn * 180 / 3.14159265258979 Nmd{C(^o  
End Function

'判断点在区域内函数 3UmkFK<  
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 r7].48D  
Dim aob, boc, cod, doa, sum As Single D"-Wo}"8O'  
  If ppx = p1x And ppy = p1y Then .gGO+8[N*  
     point_in = True Cg?Mk6i  
     Exit Function SOX7  
  End If [mQ1r*[j  
  If ppx = p2x And ppy = p2y Then \2=I//YF  
     point_in = True DAiS|x  
     Exit Function TQKcPVlE  
  End If R2?s NlF  
   If ppx = p3x And ppy = p3y Then TBrwir  
     point_in = True _
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     Exit Function Z*f%R\u  
  End If k0N>J8y  
     !'rdHSy
 
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) _68vSYr  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) lyFlJmi,r  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) :!Dm
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    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) LC##em=Y  
    sum = aob + boc + cod + doa &]LpGl  
    If 360.01 > sum And sum > 359.99 Then h,B4Tg'  
       point_in = True [ `1`E1X  
    Else ab2Cn|F  
       point_in = False ! [1aP,  
    End If *k;bkd4x  
End Function

'得到点半径,得到交点坐标函数 /YUW)?o!^N  
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() Al6%RFt  
    '求得中心点坐标 AD<>
)(  
Dim tt As String {]8|\CcY?  
Dim rt(3) As Single P(Rl/eyRM  
    '判断是否平行 LQr
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   acx = p3x - p1x "_LqIW1  
   acy = p3y - p1y L7aVj&xM  
   bdx = p4x - p2x Li|~%E1  
   bdy = p4y - p2y )D#}/3s  
   If acx * bdy = acy * bdx Then 4H,c;g=!  
      rt(0) = 0 \-]tvgA~&  
      Exit Function Xe_djy'8  
   Else r5UVBV8T  
      '判断斜率存在否 1eV&oN#  
      If p1x = p3x And p2x <> p4x Then F(."nUrf  
         tt = "ac_n_bd_y" z8'zH>  
      ElseIf p1x <> p3x And p2x = p4x Then 4G' E<ab  
         tt = "ac_y_bd_n" j!!s>7IZ  
      ElseIf p1x <> p3x And p2x <> p4x Then e(a,nZF.  
         tt = "ac_y_bd_y" B0gD4MX/  
      End If 2[3t7C  
    Select Case tt 'dh{q`#0  
         Case "ac_n_bd_y" Rvu5#_P  
            'bd线段方程 _*?qOmf=
 
            k_bd = bdy / bdx 1hCU"|VH:  
            b_bd = p2y - k_bd * p2x D8u`6/^  
            p_x = p1x hp/pm6  
            p_y = k_bd * p_x + b_bd ebJTrh<{  
         Case "ac_y_bd_n" x=xo9wEg  
            'ac线段方程 LFxk.-{=  
            k_ac = acy / acx @$^4Av-  
            b_ac = p1y - k_ac * p1x L5zCL0j`  
            p_x = p2x N0^SWA|S  
            p_y = k_ac * p_x + b_ac 4FZR }e\  
        Case "ac_y_bd_y" J;>~PXB  
           'ac，bd线段都要求 9M7P|Q  
           k_ac = acy / acx Cj4Y, N  
           b_ac = p1y - k_ac * p1x ko[d axUB  
           k_bd = bdy / bdx <yEApWd;  
           b_bd = p2y - k_bd * p2x "u4x#7n|  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) oz.z>+Q  
           p_y = k_ac * p_x + b_ac @ewi96  
        End Select X>uLGr>  
      rt(1) = p_x i}C%8}%  
      rt(2) = p_y -hm/lxyU  
     /1{
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'计算最大半径 v9r.w-  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Y7g%nz[[  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) L
-}Uj^yF  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) :7.k E  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ^&mrY[;S  
Dim bb(5) As Single fg
j$ u  
  bb(1) = rr1 tw<Oy^i  
  bb(2) = rr2 ulW>8bW&  
  bb(3) = rr3 Pf%I6bVN9  
  bb(4) = rr4 ke;=Vg|  
  nb = rr1 n.'Ps+G(  
For i = 1 To 4 L"
dN $ A  
    If nb <= bb(i) Then W<#!He  
       nb = bb(i) 9Xa.%vw>  
    End If j5:4/vD  
Next i xYv;l\20.  
    rt(0) = Sqr(nb) ,9I-3**W  
    rr = rt() $G)HU6hF*  
  End If oLX[!0M^  
         )SZ#%OE*  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  qj:[NPwaM  

[Rq|;p  
有热压工艺方面的人才或者资料分享下； ONpvx5'#  
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 F,VWi$Po\N  

高手真多！

楼主威武霸气.