[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： iJr 1w&GL$  
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关键点说几个： =,UuQJ,l  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） tSZd0G<A<o  
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 rLy<3  
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 |PI]v`[  

以下是几个重要的函数： U;QN+fF]u  
1.判断点在区域中函数 2K8?S  
2.计算夹角函数 lF=l|.c  
3.转置函数 @k~_ w#  
4.得到区域中心点，及区域半径函数 GmA5E  
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） (IrX
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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 ()E:gqQ  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single X@ljZ  
   cax = x2 - x1 'm;M+:l 6  
   cay = y2 - y1 owA0I'|V-A  
   cbx = x2 - x3 ~vCfMV[F  
   cby = y2 - y3 +Rtz`V1d  
   mo_jj = cax * cbx + cay * cby %PsDS  
   mo_ca = Sqr(cax * cax + cay * cay) 0P5!fXs*  
   mo_cb = Sqr(cbx * cbx + cby * cby) #$vef  
   cos_acb = mo_jj / (mo_ca * mo_cb) U2tsHm.O  
   'ff_cos = cos_acb $J~~.PUXQ  
   If cos_acb >= 1 Then H& #Od?  
   nn = 0 5>XrNc91  
   ElseIf cos_acb <= -1 Then O\5*p=v  
   nn = 3.14159265258979 "hRY+{m  
   Else J.`z;0]op  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ~dIb>[7wy  
   End If S;o U'KOY  
   'ff_angle = nn %^L:K5V  
   ff_angle = nn * 180 / 3.14159265258979 8Ee bWs*1  
End Function

'判断点在区域内函数 !;SpQ28  
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 XUD/\MoV  
Dim aob, boc, cod, doa, sum As Single kRs24=  
  If ppx = p1x And ppy = p1y Then 26fm}QV  
     point_in = True !b O8apn  
     Exit Function ]Q\Ogfjp  
  End If 4>4*4!KR}  
  If ppx = p2x And ppy = p2y Then 8s4y7%,|  
     point_in = True Mk=;U
Bb$X  
     Exit Function mm3goIi;Y  
  End If 9T47U; _)  
   If ppx = p3x And ppy = p3y Then @jW_ rj:<  
     point_in = True _tfZg /+)  
     Exit Function d[.kGytUt  
  End If k_9tz}Z  
     [aF?1KxNMt  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 8wz
4KG3SK  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) '676\2.  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) l`2X'sw[/  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) eNlE]W,=  
    sum = aob + boc + cod + doa Na^1dn  
    If 360.01 > sum And sum > 359.99 Then 5/Ng!bW  
       point_in = True <zN  
    Else D[)")xiG  
       point_in = False V1KWi^  
    End If 47_4`rzy;  
End Function

'得到点半径,得到交点坐标函数 wVBY^TE  
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() /)SwQgK#  
    '求得中心点坐标 B&0^3iKFi  
Dim tt As String :X[(ymWNE  
Dim rt(3) As Single ze Qgg|;  
    '判断是否平行 p(MhDS\J  
   acx = p3x - p1x C #ng`7 q  
   acy = p3y - p1y E|D~:M%~  
   bdx = p4x - p2x W|@EKE.k  
   bdy = p4y - p2y 4-[L^1%S[  
   If acx * bdy = acy * bdx Then KO(+%>^R  
      rt(0) = 0 9+.0ZP?  
      Exit Function (LPMEQhI:  
   Else -zg,pK$+  
      '判断斜率存在否 1
)u 3  
      If p1x = p3x And p2x <> p4x Then 2O {@W +Mt  
         tt = "ac_n_bd_y" buGW+TrWY  
      ElseIf p1x <> p3x And p2x = p4x Then
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wM*:U  
         tt = "ac_y_bd_n" _`WbR&d2Id  
      ElseIf p1x <> p3x And p2x <> p4x Then
~$>l@> xX  
         tt = "ac_y_bd_y" <Mo_GTOC!  
      End If 3ik  
    Select Case tt ;]?1i4p)  
         Case "ac_n_bd_y" v$"#9oh  
            'bd线段方程 ~#iRh6^98  
            k_bd = bdy / bdx D%umL/[]  
            b_bd = p2y - k_bd * p2x s z/7cLo  
            p_x = p1x %y33evX/B  
            p_y = k_bd * p_x + b_bd &R/)#NAp  
         Case "ac_y_bd_n" /hf}f=7kH  
            'ac线段方程 vpx8GiV  
            k_ac = acy / acx OA2<jrGB!  
            b_ac = p1y - k_ac * p1x [P2$[|IM  
            p_x = p2x C$\|eC j  
            p_y = k_ac * p_x + b_ac !8vHN=)z  
        Case "ac_y_bd_y" +ex@[grsGT  
           'ac，bd线段都要求 9g+/^j^>?f  
           k_ac = acy / acx S2K_>kvG)~  
           b_ac = p1y - k_ac * p1x =)m2u2c M  
           k_bd = bdy / bdx $<2r;'?0D  
           b_bd = p2y - k_bd * p2x ~fB: >ceD  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 7*y_~H  
           p_y = k_ac * p_x + b_ac
^ng#J\  
        End Select ?U~C= F?K  
      rt(1) = p_x jdQ`Y+BC  
      rt(2) = p_y 4H8vB^  
     K+xiov-r?  
'计算最大半径 -Ep cX!i  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Z5;1ySn{  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) VYkOJAEBg  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) /HgdTyR)  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) {bL6%._C  
Dim bb(5) As Single #_y#sDfzh  
  bb(1) = rr1 qyv9]Q1  
  bb(2) = rr2 MVz=:2)J2  
  bb(3) = rr3 `w6\II)aB  
  bb(4) = rr4 =v=
a:e  
  nb = rr1 ;oVdkp  
For i = 1 To 4 Ojq>4=Z\  
    If nb <= bb(i) Then mv%fX2.  
       nb = bb(i) Qn(e[ C6\  
    End If ;rJR+wpNa  
Next i fLL_{o0T  
    rt(0) = Sqr(nb) cjsQm6  
    rr = rt() jZS6f*$  
  End If ! lgsV..R  
         FGu:8`c9  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ~'KymarPU  

qEPvV  
有热压工艺方面的人才或者资料分享下； /cF 6{0XS9  
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 ^'!]|^  

高手真多！

楼主威武霸气.