[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： nn5S7!  
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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： F1gDeLmJ  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） CM8WI~  
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 +oe ~j\=  
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 KiH#*u S  

以下是几个重要的函数： |oPqX %?  
1.判断点在区域中函数 g 9>p?XY  
2.计算夹角函数 (Q#ArMMORI  
3.转置函数 $(#o)r>_R  
4.得到区域中心点，及区域半径函数 uh`~K6&*\w  
5.再有就是若干个点抽取其中一部分；或者采用随机分布（该方法会有重合点，所以没采用） 1QjrL@$>15  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 1[u{3lQ  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single \'BKI;  
   cax = x2 - x1 (J$JIPF  
   cay = y2 - y1 }yS"C fM  
   cbx = x2 - x3 ^=.|\ YM  
   cby = y2 - y3 kZPj{^c:  
   mo_jj = cax * cbx + cay * cby lt5~rH2  
   mo_ca = Sqr(cax * cax + cay * cay) k&yy_r   
   mo_cb = Sqr(cbx * cbx + cby * cby) 9bqfZ"6nXY  
   cos_acb = mo_jj / (mo_ca * mo_cb) >d#B149  
   'ff_cos = cos_acb |~#!e}L(  
   If cos_acb >= 1 Then pd>EUdbrp&  
   nn = 0 78y4nRQ*  
   ElseIf cos_acb <= -1 Then [<8<+lH=P  
   nn = 3.14159265258979 1B,RRHXn6  
   Else !\+SE"ml  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Vk{0)W7  
   End If NVJvCs)3f  
   'ff_angle = nn 0y2iS't  
   ff_angle = nn * 180 / 3.14159265258979 2$\Du9+  
End Function

'判断点在区域内函数 =Lp0i9c  
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 VGq2ITg9eE  
Dim aob, boc, cod, doa, sum As Single vTP'\^;  
  If ppx = p1x And ppy = p1y Then RHVMlMX  
     point_in = True rs 7R5 F  
     Exit Function sE-"TNONZ  
  End If &ATjDbW*(  
  If ppx = p2x And ppy = p2y Then wzP>Cq  
     point_in = True 0'RSl~QvqS  
     Exit Function o5. q  
  End If *hFT,1WE=+  
   If ppx = p3x And ppy = p3y Then 1w1(FpQO.  
     point_in = True oy/#,R_n%  
     Exit Function  Ur]5AJ  
  End If )jCAfdnCs  
     ~(4cnD
)BO  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) iMJjWkk  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 'OkF.bs  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 80axsU^H0  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 0u)]1  
    sum = aob + boc + cod + doa Y~fds#y0  
    If 360.01 > sum And sum > 359.99 Then @ ;rU#  
       point_in = True a?\ Au  
    Else e@=Bl-  
       point_in = False ^ 8egn|  
    End If 8 :Z3Q  
End Function

'得到点半径,得到交点坐标函数 /u>")f  
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() p>65(&N,  
    '求得中心点坐标 C+*: lLY  
Dim tt As String Ol D]*=.cO  
Dim rt(3) As Single @<AyCaU`.  
    '判断是否平行 W[w8@OCNf  
   acx = p3x - p1x ^5j9WV  
   acy = p3y - p1y fZT=q^26  
   bdx = p4x - p2x F0+u#/#  
   bdy = p4y - p2y >$?$&+e}  
   If acx * bdy = acy * bdx Then fh}\#WE"  
      rt(0) = 0 ZIkXy*<
(  
      Exit Function 6'+3""\  
   Else yH@W6'.  
      '判断斜率存在否 "P"~/<:)  
      If p1x = p3x And p2x <> p4x Then |f?tyQ  
         tt = "ac_n_bd_y" X0Xs"--}  
      ElseIf p1x <> p3x And p2x = p4x Then "*XR'9~7  
         tt = "ac_y_bd_n" e ST8>r  
      ElseIf p1x <> p3x And p2x <> p4x Then zF3fpEKe  
         tt = "ac_y_bd_y" >&Y8
VLcK  
      End If Rco#?'  
    Select Case tt g}P.ksM  
         Case "ac_n_bd_y" N[z7<$$  
            'bd线段方程 !1w=_  
            k_bd = bdy / bdx [|Jzs[  
            b_bd = p2y - k_bd * p2x #3\F<AJ<VB  
            p_x = p1x *:aJlvk  
            p_y = k_bd * p_x + b_bd '@ (WT~g  
         Case "ac_y_bd_n" AEe*A+  
            'ac线段方程 G>d@lt  
            k_ac = acy / acx ]B5qv6  
            b_ac = p1y - k_ac * p1x +8v^J8q0  
            p_x = p2x AQQeLdTq  
            p_y = k_ac * p_x + b_ac +tES:3Pi  
        Case "ac_y_bd_y" jf~/x>Q  
           'ac，bd线段都要求 ^ejU=0+cN  
           k_ac = acy / acx 3a"4Fn  
           b_ac = p1y - k_ac * p1x 7rbl+:y2  
           k_bd = bdy / bdx E[)`+:G]  
           b_bd = p2y - k_bd * p2x q}U^H  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) BXnSkT7  
           p_y = k_ac * p_x + b_ac aS-rRL|\L  
        End Select gH(,>}{^K  
      rt(1) = p_x t+|c)"\5h  
      rt(2) = p_y [wj&.I{^s  
     B9&"/tT  
'计算最大半径 "z1\I\ ^  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) gp$oQh#37;  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) @M?;~M?B]J  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) WIa4!\Ky!  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ^Z$%OM,  
Dim bb(5) As Single )k.;.7dXe  
  bb(1) = rr1 OjCTTz
 
  bb(2) = rr2 j[.R|I|  
  bb(3) = rr3 V{HP8f91  
  bb(4) = rr4 2$V]XSe  
  nb = rr1 n? e&I>1W  
For i = 1 To 4 WSz#g2a  
    If nb <= bb(i) Then Cb%?s  
       nb = bb(i) 9r+]V=  
    End If "W?<BpV~@!  
Next i GKTrf\"c  
    rt(0) = Sqr(nb) [nZ3}o  
    rr = rt() T<=Ci?C v  
  End If F3HpDfy  
         NldeD2~H  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  AT*J '37  

|&!04~s;E  
有热压工艺方面的人才或者资料分享下； |-t>_+. J'  
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 @)nxX))a  

高手真多！

楼主威武霸气.