[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： 5Ww,vSCV)  
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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： ?Sa,n^b*H  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 0)b1'xt',  
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 hFr+K1  
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 iV?8'^  

以下是几个重要的函数： uuD2O )v  
1.判断点在区域中函数 V(0Y   
2.计算夹角函数 CPcUB4a%#  
3.转置函数 L/WRVc6  
4.得到区域中心点，及区域半径函数 MoEh25U.  
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） 8$47Y2r@  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 A=|a!N/  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single $t"QLsk0  
   cax = x2 - x1 O_th/hl  
   cay = y2 - y1 wG)[Ik6:  
   cbx = x2 - x3 cyHbAtl  
   cby = y2 - y3 :PY8)39@K  
   mo_jj = cax * cbx + cay * cby V3VTbgF  
   mo_ca = Sqr(cax * cax + cay * cay) t4:/qy  
   mo_cb = Sqr(cbx * cbx + cby * cby) 5? Y(FhnIC  
   cos_acb = mo_jj / (mo_ca * mo_cb) l,b,U/3R.  
   'ff_cos = cos_acb /=9dX; #  
   If cos_acb >= 1 Then s%Ph  
   nn = 0 )t-P o'RW  
   ElseIf cos_acb <= -1 Then m3P7*S5NJ7  
   nn = 3.14159265258979 M3]eqxLC  
   Else w?nSQBz$  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) X_D-K F  
   End If 'IIa,']H  
   'ff_angle = nn eUCBQK  
   ff_angle = nn * 180 / 3.14159265258979  Q$`uZ  
End Function

'判断点在区域内函数 a#CjGj)  
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 v6uRzFw  
Dim aob, boc, cod, doa, sum As Single =<aFkBX-  
  If ppx = p1x And ppy = p1y Then if\`M'3Xx  
     point_in = True Em{;l:;(W  
     Exit Function x.|sCqx  
  End If Rx&.,gzj[  
  If ppx = p2x And ppy = p2y Then N;!!*
3a9=  
     point_in = True j8^#698X  
     Exit Function u:W/6QS  
  End If "66#F  
   If ppx = p3x And ppy = p3y Then a7u*d`3X=  
     point_in = True !a!4^zqp  
     Exit Function tr/.pw6  
  End If xy&*s\=:  
     7aPA+gA/  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Z
zR0k  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) L|-|DOgw  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) `}$bJCSF.n  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) J#3[,~  
    sum = aob + boc + cod + doa YG0b*QBY~  
    If 360.01 > sum And sum > 359.99 Then ('dbMH\O  
       point_in = True i 2uSPV!Tf  
    Else ;Kg7}4`I  
       point_in = False 3tkCmB  
    End If f;,*P,K  
End Function

'得到点半径,得到交点坐标函数 ,TB$D]u8  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() mWn0"1C  
    '求得中心点坐标 wPcEv
GBN=  
Dim tt As String q68m*1?y  
Dim rt(3) As Single *ywr_9  
    '判断是否平行 TK~KM  
   acx = p3x - p1x d(b~s2\i  
   acy = p3y - p1y STg} Z  
   bdx = p4x - p2x yO7#n0q  
   bdy = p4y - p2y 4)'U!jSb  
   If acx * bdy = acy * bdx Then R)isWw4  
      rt(0) = 0 '
W("s  
      Exit Function YZtd IG  
   Else |*-<G3@  
      '判断斜率存在否 WoNY8 8hT  
      If p1x = p3x And p2x <> p4x Then D$NpyF.87
 
         tt = "ac_n_bd_y" *{Z=)k%  
      ElseIf p1x <> p3x And p2x = p4x Then ,LmP >Q.  
         tt = "ac_y_bd_n" Wa&!1' @  
      ElseIf p1x <> p3x And p2x <> p4x Then Jm< uE]9  
         tt = "ac_y_bd_y" F>X<=YO0  
      End If w $`w
 
    Select Case tt puMbB9)  
         Case "ac_n_bd_y" \W= qqE]  
            'bd线段方程 :IfwhI)  
            k_bd = bdy / bdx P46Q3EE  
            b_bd = p2y - k_bd * p2x rQU6*f  
            p_x = p1x qn |~YXn  
            p_y = k_bd * p_x + b_bd $P%cdJT0  
         Case "ac_y_bd_n" E'SDT*EI  
            'ac线段方程 {c*5 )x!  
            k_ac = acy / acx )Z['=+s%  
            b_ac = p1y - k_ac * p1x
BIe:7cR%  
            p_x = p2x nf1 `)tXG  
            p_y = k_ac * p_x + b_ac O.xtY@'"  
        Case "ac_y_bd_y" I:UDEoQo  
           'ac，bd线段都要求 iy]?j$B$  
           k_ac = acy / acx $p$p C/:%  
           b_ac = p1y - k_ac * p1x ?~yJ7~3TS<  
           k_bd = bdy / bdx YV@efPy}n  
           b_bd = p2y - k_bd * p2x x7G*xHJ  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) dB0 UZirb  
           p_y = k_ac * p_x + b_ac <dr2 bz  
        End Select 2\gIjXX"  
      rt(1) = p_x M:iH7K  
      rt(2) = p_y wp> z04  
     ~<_WYSzS  
'计算最大半径 (hQi {  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 4udj"-V  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) rzLW@k  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) j|!t3}((  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) kOq8zYU|  
Dim bb(5) As Single #Q*V9kvU/H  
  bb(1) = rr1 ?A*!rW:l;  
  bb(2) = rr2 Qh-:P`CN
 
  bb(3) = rr3 ZrZDyXL  
  bb(4) = rr4 lCl5#L9  
  nb = rr1 NuD|%Ebs  
For i = 1 To 4 ecQ,DOX|b  
    If nb <= bb(i) Then [K'gvLt1  
       nb = bb(i) N3@[95  
    End If pIYXYQ=Z  
Next i DrC"M*$!  
    rt(0) = Sqr(nb) t4/ye>P &  
    rr = rt() m
w;4/ /R  
  End If T&b_*)=S  
         K:~tZ  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  XC^*z[#4{  

L8Tm8)  
有热压工艺方面的人才或者资料分享下； 7_76X)gIV  
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 .7gh2K  

高手真多！

楼主威武霸气.