[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： >a?Bk4w  
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关键点说几个： .4+Rac  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 6gV*G  
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 Y2r}W3F=  
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 >
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以下是几个重要的函数： h:aa^a~yi  
1.判断点在区域中函数 W@d&X+7e
 
2.计算夹角函数 :PO./IBX  
3.转置函数 F/oqYk9`  
4.得到区域中心点，及区域半径函数 'ITq\1z  
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） $
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6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 )WqolB  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single $[|(&8+7  
   cax = x2 - x1 luoQ#1F?sl  
   cay = y2 - y1 !&:=sA  
   cbx = x2 - x3 Bj@>iw?g'  
   cby = y2 - y3 bZ`v1d (r  
   mo_jj = cax * cbx + cay * cby K\K& K~Z  
   mo_ca = Sqr(cax * cax + cay * cay) 0m_yW$w  
   mo_cb = Sqr(cbx * cbx + cby * cby) J"r?F0  
   cos_acb = mo_jj / (mo_ca * mo_cb) BSm"]!D8*  
   'ff_cos = cos_acb :33@y%>L
 
   If cos_acb >= 1 Then }Ng P`m  
   nn = 0 #mQ@4k9i  
   ElseIf cos_acb <= -1 Then '_c/
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   nn = 3.14159265258979 kdNo<x1o  
   Else 6v)TCj/  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) bzi"7%c  
   End If AB3_|Tza~&  
   'ff_angle = nn :v^/k]S  
   ff_angle = nn * 180 / 3.14159265258979 U6.aoqb%  
End Function

'判断点在区域内函数 {$frR "K  
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 JxVGzb
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Dim aob, boc, cod, doa, sum As Single SzW;Yb"#^k  
  If ppx = p1x And ppy = p1y Then |*bUcS<S  
     point_in = True $TUYxf0q  
     Exit Function x3O%W?5  
  End If  [Sm<X  
  If ppx = p2x And ppy = p2y Then Tz,-~mc  
     point_in = True NW\C
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     Exit Function VX)8pV$  
  End If 3%POTAw%  
   If ppx = p3x And ppy = p3y Then p(F@lL-  
     point_in = True j,YrM?Xdo  
     Exit Function Wdd}y`lS  
  End If <pX?x3-'  
     u({^8: AYu  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) pCKP{c=6Q  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) owNwj  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) x1gS^9MqCB  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) J9T2 p\5  
    sum = aob + boc + cod + doa $?GggP d  
    If 360.01 > sum And sum > 359.99 Then XM
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       point_in = True K,S4  
    Else 8Ths"zwn  
       point_in = False KsULQJ#,  
    End If XFhH+4#]  
End Function

'得到点半径,得到交点坐标函数 _T)y5/[  
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() 8
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    '求得中心点坐标 $yOB-  
Dim tt As String I9kz)Q o  
Dim rt(3) As Single R}oN8
 
    '判断是否平行 l!p`g>$&f  
   acx = p3x - p1x FVXsu!R  
   acy = p3y - p1y k+_>`Gre}  
   bdx = p4x - p2x vP{i+s18B  
   bdy = p4y - p2y yi8vD~aA[  
   If acx * bdy = acy * bdx Then g9C;JmU  
      rt(0) = 0 <)d%c%f'`  
      Exit Function 9R=avfI  
   Else m=}h7&5p  
      '判断斜率存在否 *~8F.c
x  
      If p1x = p3x And p2x <> p4x Then "kApGNB  
         tt = "ac_n_bd_y" rxp|[>O<  
      ElseIf p1x <> p3x And p2x = p4x Then GgxPpS<ne  
         tt = "ac_y_bd_n" MZ38=nJ  
      ElseIf p1x <> p3x And p2x <> p4x Then KR.;X3S}  
         tt = "ac_y_bd_y" 3,i j@P  
      End If +s#%\:Y M  
    Select Case tt SkDr4kds  
         Case "ac_n_bd_y" o@A`AA9  
            'bd线段方程 c|<F8n  
            k_bd = bdy / bdx CVO_F=;  
            b_bd = p2y - k_bd * p2x 0YoKSo  
            p_x = p1x [P}Bq6;p  
            p_y = k_bd * p_x + b_bd 56C8)?  
         Case "ac_y_bd_n" B~:yM1f@u4  
            'ac线段方程 d- ZUuw  
            k_ac = acy / acx ]I*RuDv}  
            b_ac = p1y - k_ac * p1x A^aY-V  
            p_x = p2x V_3oAu54s{  
            p_y = k_ac * p_x + b_ac FH}?QebSR  
        Case "ac_y_bd_y" K qJE?caw  
           'ac，bd线段都要求 (H:c80/V  
           k_ac = acy / acx ")8l'^Mq2  
           b_ac = p1y - k_ac * p1x 7c_2.T@4  
           k_bd = bdy / bdx ztU"CRa8  
           b_bd = p2y - k_bd * p2x ];5J  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) -O &>HA  
           p_y = k_ac * p_x + b_ac q&=z^Ln!G  
        End Select =*fq5v  
      rt(1) = p_x
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      rt(2) = p_y &_3#W.w~Z  
     ,OlS>>,  
'计算最大半径 <^nS%hXEr  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) huqtk4u  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) IWYQ67Yj   
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) |}{gE=]  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Sk EI51]  
Dim bb(5) As Single gI7*zR4D  
  bb(1) = rr1 ln_&Ux+l  
  bb(2) = rr2 +1#oVl!  
  bb(3) = rr3 7s^b@&Le  
  bb(4) = rr4 ksq4t  
  nb = rr1 bF9.k  
For i = 1 To 4 5_yw  
    If nb <= bb(i) Then qBF|' .$^  
       nb = bb(i) 6!i`\>I]  
    End If ((Av3{05H&  
Next i e oE)Mq  
    rt(0) = Sqr(nb) ,~7~ S"  
    rr = rt() r]6+&K
  
  End If ~AWn 1vFc  
         #i~P])%gNP  
End Function

高手啊.人才啊.

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

YHY*dk*|C  
有热压工艺方面的人才或者资料分享下； ~("bpS#ZgD  
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 =oq=``%  

高手真多！

楼主威武霸气.