[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： ,T<q"d7-#  
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关键点说几个： ijuIf9!  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） KbicP<  
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 k&M
9Hn2  
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 KO''B or  

以下是几个重要的函数： YZllfw$9  
1.判断点在区域中函数 NBaXfWh  
2.计算夹角函数 `=FDNOwp  
3.转置函数 3`%U)gCT5  
4.得到区域中心点，及区域半径函数 C(jUM!m  
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） FcI ZG _  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 )Co&(;zf  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ~P@6fK/M  
   cax = x2 - x1 ?x-:JME0  
   cay = y2 - y1 *$/!.e  
   cbx = x2 - x3
oD?c]}3  
   cby = y2 - y3 _1EWmHZ?  
   mo_jj = cax * cbx + cay * cby Pko2fJt1  
   mo_ca = Sqr(cax * cax + cay * cay) 9%MHIY5  
   mo_cb = Sqr(cbx * cbx + cby * cby) bzh`s<+  
   cos_acb = mo_jj / (mo_ca * mo_cb) s;NPY  
   'ff_cos = cos_acb >?yxig:_  
   If cos_acb >= 1 Then m:4Ec>?e  
   nn = 0 o%1dbbh  
   ElseIf cos_acb <= -1 Then T>e4Og"?  
   nn = 3.14159265258979 }p$@.+  
   Else n)6mfoe  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) trAIh}Dj  
   End If 5uxB)Dx)  
   'ff_angle = nn Z<M?_<3  
   ff_angle = nn * 180 / 3.14159265258979 W2-1oS~ma  
End Function

'判断点在区域内函数 fBZAO  
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 NL7CeHs5  
Dim aob, boc, cod, doa, sum As Single U5!T-o;3}  
  If ppx = p1x And ppy = p1y Then mYRW/8+g  
     point_in = True IJz=SV  
     Exit Function f 3t&Bcw$  
  End If N-cLp}D}WB  
  If ppx = p2x And ppy = p2y Then ^;[|,:8f7L  
     point_in = True F
9\T<  
     Exit Function O>)Fl42IeD  
  End If 1NI%J B  
   If ppx = p3x And ppy = p3y Then GR ^d/  
     point_in = True jXCSD@?]K  
     Exit Function pjVF^gv,*  
  End If ;{%R'  
     x.ZW%P1  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) QW[ gDc  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) \n}@}E L  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) &Bfgvws;  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) Aq~}<qkIF+  
    sum = aob + boc + cod + doa `N.^+Mvx-  
    If 360.01 > sum And sum > 359.99 Then M,V~oc5
 
       point_in = True =k+nC)e  
    Else !da[#zK  
       point_in = False x;; =+)Gg  
    End If ZQV,gIFys  
End Function

'得到点半径,得到交点坐标函数 B<}0r4T}  
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() ,|u^-J@  
    '求得中心点坐标 wEu"X  
Dim tt As String S>y(3E]I  
Dim rt(3) As Single AXmW7/Sj"  
    '判断是否平行 9f/RD?(1O  
   acx = p3x - p1x =iZj&B X  
   acy = p3y - p1y czH`a=mjH  
   bdx = p4x - p2x Yc]  
   bdy = p4y - p2y .>A`FqV$~+  
   If acx * bdy = acy * bdx Then k_$9cVA  
      rt(0) = 0 : U:>X6f  
      Exit Function <.6bni )  
   Else HXY,e$c#y  
      '判断斜率存在否 V <;vy&&  
      If p1x = p3x And p2x <> p4x Then p(J,fus  
         tt = "ac_n_bd_y" Uw:gJ
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      ElseIf p1x <> p3x And p2x = p4x Then !rwe|"8m?u  
         tt = "ac_y_bd_n" aOWfu^&H:  
      ElseIf p1x <> p3x And p2x <> p4x Then djG
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         tt = "ac_y_bd_y" E?@batIrf  
      End If Ivdg1X  
    Select Case tt s2'] "wM  
         Case "ac_n_bd_y" h%0hryGB  
            'bd线段方程 :j=/>d],%  
            k_bd = bdy / bdx 'c")]{  
            b_bd = p2y - k_bd * p2x L4wKG&  
            p_x = p1x ~ R:=zGDV  
            p_y = k_bd * p_x + b_bd 4Z"JC9As  
         Case "ac_y_bd_n" 3$E\B=7/U  
            'ac线段方程 XX@@tzN  
            k_ac = acy / acx p~h)@  
            b_ac = p1y - k_ac * p1x afJ`1l  
            p_x = p2x iCK p"(kf  
            p_y = k_ac * p_x + b_ac Q8^fgI|  
        Case "ac_y_bd_y" vxmz3ht,Q  
           'ac，bd线段都要求 l[)ZEEP  
           k_ac = acy / acx '=^$;3Z  
           b_ac = p1y - k_ac * p1x K}(0H[P  
           k_bd = bdy / bdx I,pI2  
           b_bd = p2y - k_bd * p2x TAl#V7PF}  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) $cUTe  
           p_y = k_ac * p_x + b_ac $2?10}
mrx  
        End Select uk\-"dS  
      rt(1) = p_x `!t+sX-n  
      rt(2) = p_y 9*"Ae0ok1  
     E}*   
'计算最大半径 `QIYnokL  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) G{8>
 
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) P<1ZpL  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 5NT?A,r"  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) X9lh@`3  
Dim bb(5) As Single E(l'\q'.  
  bb(1) = rr1 .gPXW=r  
  bb(2) = rr2 !oDX+hd,%>  
  bb(3) = rr3 K:i{us`  
  bb(4) = rr4 Gxj3/&]^Y  
  nb = rr1 gp/_# QVWC  
For i = 1 To 4 Wg3\hv29  
    If nb <= bb(i) Then C6-71`C0  
       nb = bb(i) 9w%|Nk>=>  
    End If 0A7 qO1%xw  
Next i H /kSFf{  
    rt(0) = Sqr(nb) tmCm54  
    rr = rt() 0."TSe83\  
  End If [^U#ic>cT  
         kDrqV{_  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  t|gEMDGa3  

KfU4#2}
 
有热压工艺方面的人才或者资料分享下； $c-h'o  
我公司主要做透镜类产品，现在有客户要审核我公司的导光膜工艺，头疼 RLypWjMx$
 

高手真多！

楼主威武霸气.