[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： Tty_P,  
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描述:请输入描述

图片:2.jpg

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关键点说几个： 'K&^y%~py,  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） #{K}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
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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 Oy EOb>  

以下是几个重要的函数： corNw+|/w  
1.判断点在区域中函数 dynkb901s  
2.计算夹角函数 O|K-UTWH%  
3.转置函数 BOt1J_;(rO  
4.得到区域中心点，及区域半径函数 `A\,$(q+  
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） ]2E#P.-!b  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ;*%3J$T+  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single YCl&}/.pA  
   cax = x2 - x1 1X5M
knA  
   cay = y2 - y1 3vXa#f>P<  
   cbx = x2 - x3 IA%|OVAfF  
   cby = y2 - y3 -7Bg5{FA  
   mo_jj = cax * cbx + cay * cby 1.0:  
   mo_ca = Sqr(cax * cax + cay * cay) 8Z|A'M  
   mo_cb = Sqr(cbx * cbx + cby * cby) &x?m5%^l  
   cos_acb = mo_jj / (mo_ca * mo_cb) A"tE~m;"7  
   'ff_cos = cos_acb Ab #}BHI  
   If cos_acb >= 1 Then >:Y"DX-  
   nn = 0 Nl]_Ie6  
   ElseIf cos_acb <= -1 Then o75l
&`  
   nn = 3.14159265258979 Ql
i#=0{`  
   Else }j$tFFVi~  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ; ,Nvg6c  
   End If )\KU:_l  
   'ff_angle = nn E3LEeXcLS  
   ff_angle = nn * 180 / 3.14159265258979 ^jbjHI&  
End Function

'判断点在区域内函数 ::p%R@?  
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 Or
#KF6+ut  
Dim aob, boc, cod, doa, sum As Single 2FN E ;y(  
  If ppx = p1x And ppy = p1y Then w~C\5 i  
     point_in = True =pZ$oTR  
     Exit Function %Rt 5$+dNT  
  End If +~>cAWZq_  
  If ppx = p2x And ppy = p2y Then tkYPfUvTE  
     point_in = True D GL=\  
     Exit Function !hFzIp  
  End If ( Sjlm^bca  
   If ppx = p3x And ppy = p3y Then Yl&bv#[z  
     point_in = True An_3DrUFV_  
     Exit Function :q>)c]  
  End If ]eUD3WUe>q  
     OI_Px3) y  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) N\"Hf=Y(~  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) *JRM(V+IEv  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) SdF+b+P]  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) #<y/m*Ota  
    sum = aob + boc + cod + doa O]Ey@7 &  
    If 360.01 > sum And sum > 359.99 Then b
")O#v.  
       point_in = True 4p7j"d5  
    Else Ei<m/v  
       point_in = False T/0cPn
0>  
    End If Q/@ pcU  
End Function

'得到点半径,得到交点坐标函数
p' 6h9/  
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() F >H\F@Wl  
    '求得中心点坐标 G)?j(El  
Dim tt As String 7xM4=\~OG  
Dim rt(3) As Single 1Q=L/keP  
    '判断是否平行 &lID6{79Z  
   acx = p3x - p1x \PD%=
~  
   acy = p3y - p1y .:XXc  
   bdx = p4x - p2x Q8A+\LR~)  
   bdy = p4y - p2y ]heVR&bQ  
   If acx * bdy = acy * bdx Then Lxn-M5RPQ  
      rt(0) = 0 @#*{* S8  
      Exit Function )Y&B63]B  
   Else k%8kt4\wn6  
      '判断斜率存在否 <>(v~a]  
      If p1x = p3x And p2x <> p4x Then 2kOaKH[(q  
         tt = "ac_n_bd_y" 2s=zT5  
      ElseIf p1x <> p3x And p2x = p4x Then k.})3~F-  
         tt = "ac_y_bd_n" h+7U'+|%A  
      ElseIf p1x <> p3x And p2x <> p4x Then *%\Xw*\0  
         tt = "ac_y_bd_y" x?]fHin_  
      End If mML B?I  
    Select Case tt m;nH v  
         Case "ac_n_bd_y"  )y6  
            'bd线段方程 C8do8$  
            k_bd = bdy / bdx VU6+"2+'2  
            b_bd = p2y - k_bd * p2x 1;+77<  
            p_x = p1x EuA352x  
            p_y = k_bd * p_x + b_bd iaQfxQP1w%  
         Case "ac_y_bd_n" `
gF]  
            'ac线段方程 V6+:g=@U-l  
            k_ac = acy / acx \),zDO+  
            b_ac = p1y - k_ac * p1x R6`mmJ+'  
            p_x = p2x bMsThoePT
 
            p_y = k_ac * p_x + b_ac w11L@t[5W8  
        Case "ac_y_bd_y" xSO5?eR"u  
           'ac，bd线段都要求 8Ht=B,7T  
           k_ac = acy / acx 1FG"Ak}D  
           b_ac = p1y - k_ac * p1x APJFy@l}  
           k_bd = bdy / bdx /cVZ/"  
           b_bd = p2y - k_bd * p2x yRDtPK"E-  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 6mIeV0Q'  
           p_y = k_ac * p_x + b_ac Y9 Bk$$#\  
        End Select _RS CyV  
      rt(1) = p_x Z2-tDp(I  
      rt(2) = p_y \F\xZ.r  
     ,,1y0s0`  
'计算最大半径 .g7\+aiTUd  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) nEP3B'+  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) :o87<) _F  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) tkff\W[JU  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) /!.]Y8yEH  
Dim bb(5) As Single In;P33'p  
  bb(1) = rr1 l)~$/#k  
  bb(2) = rr2 a1ps'^Qhh  
  bb(3) = rr3 (WP^}V5  
  bb(4) = rr4 {iCX?Sb  
  nb = rr1 0W_u"UY$c  
For i = 1 To 4 ~0o>B$xJ  
    If nb <= bb(i) Then W6r3v)~  
       nb = bb(i) 5|`./+Ghk  
    End If (]VY==t~  
Next i ay`R jT  
    rt(0) = Sqr(nb) ^rO!-  
    rr = rt() uJ fXe  
  End If \IEuu^  
         $"}[\>e*{  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  8KKhD$  

KYl!Iw67d  
有热压工艺方面的人才或者资料分享下； am7~  
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 |8)\8b|VuC  

高手真多！

楼主威武霸气.