[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： [jQp
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关键点说几个： N{!i
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1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） #lo6c;*m5  
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 2QcOR4_V  
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 5DU6rks%
 

以下是几个重要的函数： t>RY7C;PuS  
1.判断点在区域中函数 3pROf#M  
2.计算夹角函数
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3.转置函数 3ZPWze6  
4.得到区域中心点，及区域半径函数 ~vhE|f  
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） `
$IK`O  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 qr^3R&z!}  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single HWrO"b*tO  
   cax = x2 - x1 &{hL&BLr  
   cay = y2 - y1 8 >EWKI
9  
   cbx = x2 - x3 {4}yKjW%z  
   cby = y2 - y3 6'57   
   mo_jj = cax * cbx + cay * cby SM#]H-3  
   mo_ca = Sqr(cax * cax + cay * cay) bo>*fNqAIy  
   mo_cb = Sqr(cbx * cbx + cby * cby) Zn+.
;o)E<  
   cos_acb = mo_jj / (mo_ca * mo_cb) *%NT~C q  
   'ff_cos = cos_acb uBKgcpvTs  
   If cos_acb >= 1 Then aiUY>M#|  
   nn = 0 #Y`~(K47  
   ElseIf cos_acb <= -1 Then Fnv;^}\z  
   nn = 3.14159265258979 (N6i4 g6  
   Else %lhEM}Sm  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Lx1FpHo  
   End If k,6f &#x  
   'ff_angle = nn %nZo4hnr$r  
   ff_angle = nn * 180 / 3.14159265258979 xC:L)7#aw  
End Function

'判断点在区域内函数 / }X1W  
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 #e1>H1eU  
Dim aob, boc, cod, doa, sum As Single Wx}8T[A}  
  If ppx = p1x And ppy = p1y Then z"L/G  
     point_in = True drP=A~?&:  
     Exit Function U^%Q}'UYym  
  End If ;O6;.5q&  
  If ppx = p2x And ppy = p2y Then gQg"j)  
     point_in = True "@@u3`#  
     Exit Function F?*-4I-  
  End If 0
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   If ppx = p3x And ppy = p3y Then ^7U G$A  
     point_in = True ~O0 $Suv  
     Exit Function L|:`^M+^w  
  End If  .-c4wm}  
     nI-w}NQ  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 9'giU r  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) /QWvW=F2<  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) KIf da
fRL  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 1\~ "VF*{  
    sum = aob + boc + cod + doa VcO0sa f`  
    If 360.01 > sum And sum > 359.99 Then -q1??u  
       point_in = True vhW2PzHFRi  
    Else mbxZL<ua  
       point_in = False 2!m/  
    End If xp)sBM7A  
End Function

'得到点半径,得到交点坐标函数 5y[Oj^  
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() uM IIYS  
    '求得中心点坐标 +T1pJ 89P  
Dim tt As String EoR}Af  
Dim rt(3) As Single EzM ?Nft  
    '判断是否平行 uK"=i8rs4  
   acx = p3x - p1x v\gLWq'  
   acy = p3y - p1y l'-Bu(  
   bdx = p4x - p2x {OkV%Q<  
   bdy = p4y - p2y B$fPgW-  
   If acx * bdy = acy * bdx Then !}#8)?p  
      rt(0) = 0 *=/ { HvJ  
      Exit Function -hGk?_Nqa/  
   Else 3tIVXtUCUk  
      '判断斜率存在否 x;P_1J%Q  
      If p1x = p3x And p2x <> p4x Then \^J%sf${  
         tt = "ac_n_bd_y" TOB-aAO  
      ElseIf p1x <> p3x And p2x = p4x Then x:NY\._  
         tt = "ac_y_bd_n" fP 1[[3i  
      ElseIf p1x <> p3x And p2x <> p4x Then )Xz,j9GzJS  
         tt = "ac_y_bd_y" OUPUixz2Z  
      End If {tuYs:  
    Select Case tt .PIL +x*]N  
         Case "ac_n_bd_y" np"\19^  
            'bd线段方程 ~F|+o}a`  
            k_bd = bdy / bdx 3=P]x;[ba  
            b_bd = p2y - k_bd * p2x 45@ I*`  
            p_x = p1x u"cV%(#  
            p_y = k_bd * p_x + b_bd *eTqVG.  
         Case "ac_y_bd_n" +ZaSM~   
            'ac线段方程 ,Bi.1 %$  
            k_ac = acy / acx jjB~G^n  
            b_ac = p1y - k_ac * p1x ["k,QX  
            p_x = p2x Q^9_'t}X  
            p_y = k_ac * p_x + b_ac ]b:Lo  
        Case "ac_y_bd_y" 
b7?uq9  
           'ac，bd线段都要求 H7&8\FNa  
           k_ac = acy / acx 
/$xU  
           b_ac = p1y - k_ac * p1x :1.L}4"gg  
           k_bd = bdy / bdx Y1W1=Uc uk  
           b_bd = p2y - k_bd * p2x ,*TmIPNK  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) pSH
=%u>  
           p_y = k_ac * p_x + b_ac TTX5EDCrC  
        End Select hc(#{]].  
      rt(1) = p_x  j|DsG,  
      rt(2) = p_y E1aHKjLQ  
     *MFIV
02[N  
'计算最大半径 [\98$BN  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) ?DS@e@lx  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) w,p PYf/t  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ;C9_?u~#  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) $Ps|HN  
Dim bb(5) As Single {=9,n\85#  
  bb(1) = rr1 ,GhS[VJjR  
  bb(2) = rr2 iJ)_RSFK  
  bb(3) = rr3 PFlNo` iO  
  bb(4) = rr4 CAig]=2'  
  nb = rr1 Fc)@,/R"v  
For i = 1 To 4 HT
v2#  
    If nb <= bb(i) Then }z'8Bu  
       nb = bb(i) PfAgM1  
    End If @|Cz-J;D  
Next i 8+Lm's=W*  
    rt(0) = Sqr(nb) !3c\NbU  
    rr = rt() [x=s(:qy  
  End If e9Wa<i8  
         )Yh+c=6 ?  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ]6,\r"  

mX"oW_EK  
有热压工艺方面的人才或者资料分享下； +uF>2b6'  
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 ,C\i^>=  

高手真多！

楼主威武霸气.