[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： FYx `o\  

n"^/UQ|#j  
!=~s/{$PE  

关键点说几个： 7/p J6>  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） j#Ky0+@V  
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 .-O@UQx.I  
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
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以下是几个重要的函数： *x*,I,03  
1.判断点在区域中函数 |5<&r]xN  
2.计算夹角函数 O$<%z[  
3.转置函数 [G'!`^V,  
4.得到区域中心点，及区域半径函数 6`s%%v  
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） `lu"yF  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 NrI5uC7  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single V&4:nIS>z  
   cax = x2 - x1 O yH!V&w  
   cay = y2 - y1 VkN[=0a,  
   cbx = x2 - x3 2l[A=Z  
   cby = y2 - y3 WFeMr%Zqh>  
   mo_jj = cax * cbx + cay * cby |W~V@n8"6  
   mo_ca = Sqr(cax * cax + cay * cay) 'wB H
uq  
   mo_cb = Sqr(cbx * cbx + cby * cby) $!l2=^\3  
   cos_acb = mo_jj / (mo_ca * mo_cb) |qy"%W@  
   'ff_cos = cos_acb zI2KIXcc  
   If cos_acb >= 1 Then ]"7DV3_  
   nn = 0 QS=$#Gp  
   ElseIf cos_acb <= -1 Then VM\Z<}C  
   nn = 3.14159265258979 }x#P<d(  
   Else R26tQbwE  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ^ ]6 80h  
   End If 1{Alj27  
   'ff_angle = nn n6!Ihip$  
   ff_angle = nn * 180 / 3.14159265258979 LA=>g/+i.X  
End Function

'判断点在区域内函数 H;t8(-F@'  
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 %oCjZ"ke  
Dim aob, boc, cod, doa, sum As Single o4[2`mT  
  If ppx = p1x And ppy = p1y Then s[B6%DI/5  
     point_in = True zIQc#F6\5  
     Exit Function mN'9|`>V>  
  End If u<y\iZ[   
  If ppx = p2x And ppy = p2y Then 6pn@`UK  
     point_in = True #c)Ou!Ldb  
     Exit Function /6+%(f}7l  
  End If V\M!]Nnxr  
   If ppx = p3x And ppy = p3y Then kzVI:  
     point_in = True 7SY->-H8  
     Exit Function *ckrn>E{h  
  End If FTYLMQ i  
     \IZ
4(Z  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) zHs  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 33KPo0g7  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) UH^wyKbM  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) g1*H|nh2  
    sum = aob + boc + cod + doa "xc*A&Sg  
    If 360.01 > sum And sum > 359.99 Then "g:&Ge*X  
       point_in = True sV'.Bomq  
    Else ]>4Qs  
       point_in = False JdYF&~  
    End If <:{[Zvl'k  
End Function

'得到点半径,得到交点坐标函数 8kc'|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() S2 h  
    '求得中心点坐标 'sQO0611S  
Dim tt As String ^oB1 &G  
Dim rt(3) As Single x0;}b
-f  
    '判断是否平行 pVa|o&,  
   acx = p3x - p1x FuiW\=^  
   acy = p3y - p1y }7
z+  
   bdx = p4x - p2x f$W}d0(F;  
   bdy = p4y - p2y %+!9  
   If acx * bdy = acy * bdx Then I2lZ>3X{  
      rt(0) = 0 ~kJpBt7M  
      Exit Function I64:-P[\  
   Else kZ[yv  
      '判断斜率存在否 Lm{ o=v  
      If p1x = p3x And p2x <> p4x Then +,^M{^%  
         tt = "ac_n_bd_y" M)pi)$&c  
      ElseIf p1x <> p3x And p2x = p4x Then *Z2Q]?:{ i  
         tt = "ac_y_bd_n" m.a
1  
      ElseIf p1x <> p3x And p2x <> p4x Then lKwT5ma7  
         tt = "ac_y_bd_y" :RO:k|g  
      End If 1V3J:W#;  
    Select Case tt *g41"Cl  
         Case "ac_n_bd_y" _po 4(U&  
            'bd线段方程 >T^v4A  
            k_bd = bdy / bdx ZWW8Hr  
            b_bd = p2y - k_bd * p2x Msu2OF *x  
            p_x = p1x vEp8
Hc  
            p_y = k_bd * p_x + b_bd KR(ftG'  
         Case "ac_y_bd_n" ']Xx#U N  
            'ac线段方程 MNmQ%R4jRN  
            k_ac = acy / acx QGj5\{E_  
            b_ac = p1y - k_ac * p1x OjEA;;qq  
            p_x = p2x t-(7Q8(  
            p_y = k_ac * p_x + b_ac VEEeQy
  
        Case "ac_y_bd_y" TXl9c6  
           'ac，bd线段都要求 o5XUDDi  
           k_ac = acy / acx RX\O'Zwlj  
           b_ac = p1y - k_ac * p1x R.`J"J0/~  
           k_bd = bdy / bdx [:S F(*}  
           b_bd = p2y - k_bd * p2x
&LQab>{*K  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) FN`kSTm*0!  
           p_y = k_ac * p_x + b_ac h#ot)m|I  
        End Select 3 v$
4LY  
      rt(1) = p_x 2=M!lB *  
      rt(2) = p_y V\hct$ 7Vm  
     X*"O'XCA  
'计算最大半径 9d}ny
J  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) be#"517  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) EoCwS  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) IEf^.Z
 
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ( +hI
  
Dim bb(5) As Single G.e\#_RR?  
  bb(1) = rr1 vkgL"([_  
  bb(2) = rr2 Z[bC@y[Wb  
  bb(3) = rr3 S IK{GWX  
  bb(4) = rr4 'oL[rO~j  
  nb = rr1 ahv=HWX k  
For i = 1 To 4 Tic9ri  
    If nb <= bb(i) Then ADz|Y~V!  
       nb = bb(i) 3*JybMo"  
    End If 1&"1pH  
Next i 4344PBj  
    rt(0) = Sqr(nb) Sxu v}y\  
    rr = rt() 4O^1gw  
  End If ^D[;JV  
         m/nn}+*C  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  /o2eKx  

,e,{6Sg6gl  
有热压工艺方面的人才或者资料分享下；
w5Xdq_e3  
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 t {}1f  

高手真多！

楼主威武霸气.