[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： H^%lDz  
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关键点说几个： uA tV".  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 6RO(]5wX  
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 f"[J"j8  
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 #p(h]T32  

以下是几个重要的函数： <P[T!gST  
1.判断点在区域中函数 j`'`)3f  
2.计算夹角函数 Ei}/iBG@  
3.转置函数 J?@DGp+t  
4.得到区域中心点，及区域半径函数 ,j
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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） c .3ZXqpI;  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 OaJB=J%  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 0nn okN^  
   cax = x2 - x1 WARb"8Kg  
   cay = y2 - y1 +a&p$\  
   cbx = x2 - x3 hT$~ygQ  
   cby = y2 - y3 M` q?Fk  
   mo_jj = cax * cbx + cay * cby f.aSKQD  
   mo_ca = Sqr(cax * cax + cay * cay) !TZhQiorC  
   mo_cb = Sqr(cbx * cbx + cby * cby) N8qDdr9p?c  
   cos_acb = mo_jj / (mo_ca * mo_cb) Wcb7 ;~K  
   'ff_cos = cos_acb 7^wc)E^H
 
   If cos_acb >= 1 Then *Do/+[Ae  
   nn = 0 .)}@J5P)  
   ElseIf cos_acb <= -1 Then swA+f  
   nn = 3.14159265258979 `U+l?S^$  
   Else 8^Hn"v  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ju}fL<<e  
   End If b'VV'+|  
   'ff_angle = nn 4S~o-`&W  
   ff_angle = nn * 180 / 3.14159265258979 /9o!
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End Function

'判断点在区域内函数 G
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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 66^ycZCH  
Dim aob, boc, cod, doa, sum As Single UzXE_S  
  If ppx = p1x And ppy = p1y Then [tMZ G%h  
     point_in = True 4iW'kuK  
     Exit Function 2o>)7^9|#<  
  End If vG \a1H  
  If ppx = p2x And ppy = p2y Then -n'F v@U  
     point_in = True ypJ".  
     Exit Function n@ w^V   
  End If RI
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   If ppx = p3x And ppy = p3y Then Vi4~`;|&b+  
     point_in = True ]f]<4HD=i  
     Exit Function e/->_T(I  
  End If `
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     )DYI .  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) hJzxbr <  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) {.yStB.T  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) DE2a5+^  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 1? FrJ6V  
    sum = aob + boc + cod + doa 1sPdz L  
    If 360.01 > sum And sum > 359.99 Then 8k(P,o  
       point_in = True "5eNLqt^q  
    Else 0i8LWX_M  
       point_in = False a_h]?5 :c  
    End If C>[Uvc  
End Function

'得到点半径,得到交点坐标函数 G;f/Tch  
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() = waA`Id  
    '求得中心点坐标 c\% r3
8  
Dim tt As String ORu2V#
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Dim rt(3) As Single
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    '判断是否平行 WcC?8X2  
   acx = p3x - p1x 8EVgoJ.  
   acy = p3y - p1y I|# 5NE6  
   bdx = p4x - p2x B75k^ohfj  
   bdy = p4y - p2y Jv.UQ  
   If acx * bdy = acy * bdx Then gIA@l`
"  
      rt(0) = 0 d&#~h:~  
      Exit Function
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   Else D~
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      '判断斜率存在否 &i!vd/*WlD  
      If p1x = p3x And p2x <> p4x Then OLI$1d_  
         tt = "ac_n_bd_y" pH`44KAuM  
      ElseIf p1x <> p3x And p2x = p4x Then $ "Bh]
-  
         tt = "ac_y_bd_n" e)E$}4  
      ElseIf p1x <> p3x And p2x <> p4x Then J<Pw+6B~  
         tt = "ac_y_bd_y" WW~+?g5  
      End If 7z~_/mAI  
    Select Case tt 5XLs}:  
         Case "ac_n_bd_y" si4don  
            'bd线段方程 WoxwEi1~0  
            k_bd = bdy / bdx *'"^NSJ  
            b_bd = p2y - k_bd * p2x w1;hy"zPsj  
            p_x = p1x e L.(p k^<  
            p_y = k_bd * p_x + b_bd A{B/lX)  
         Case "ac_y_bd_n" Py{<bd  
            'ac线段方程 *6(kbes  
            k_ac = acy / acx <9>vO,n  
            b_ac = p1y - k_ac * p1x V]EtwA  
            p_x = p2x uytE^  
            p_y = k_ac * p_x + b_ac @,XSs  
        Case "ac_y_bd_y" fu$
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           'ac，bd线段都要求 W5#611  
           k_ac = acy / acx :$+-3_oLMQ  
           b_ac = p1y - k_ac * p1x hR5_+cuIp  
           k_bd = bdy / bdx 2c?qV  
           b_bd = p2y - k_bd * p2x ;l$
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           p_x = -(b_bd - b_ac) / (k_bd - k_ac) _4cvX  
           p_y = k_ac * p_x + b_ac } G<rt  
        End Select "`[!Lz
 
      rt(1) = p_x z#F.xVg'  
      rt(2) = p_y jjM{]  
     {-BRt)L[  
'计算最大半径 lD{Aa!\  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) >c-fI$]  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) l]<L [Y,E-  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) l
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   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) rWh6RYd<T  
Dim bb(5) As Single J9T3nTfL  
  bb(1) = rr1 ={?vAb:  
  bb(2) = rr2 N N|u_  
  bb(3) = rr3 =+w*gDr  
  bb(4) = rr4 21RP=0Q:  
  nb = rr1 %& _V0R\k  
For i = 1 To 4 T;L>P[hNn  
    If nb <= bb(i) Then Vb qto|X@  
       nb = bb(i) hp"L8w  
    End If *-s,. F+c  
Next i Nm):9YQ/  
    rt(0) = Sqr(nb) [31p&FxM  
    rr = rt() ) _ I,KEe  
  End If e?bYjJq  
         s(
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End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Wi n8LOC  

&$`hQgi  
有热压工艺方面的人才或者资料分享下； +kdyS
WF  
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 wxLXh6|6%_  

高手真多！

楼主威武霸气.