[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： m1y `v"  
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关键点说几个： 5"uNj<.V  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 07Y_^d  
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 Ys%'#f  
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 -#OwJ*-U  

以下是几个重要的函数： lJlhl7  
1.判断点在区域中函数 XD 5n]AL  
2.计算夹角函数 Wt"ww~h`(  
3.转置函数 Nuo^+z E  
4.得到区域中心点，及区域半径函数 }1,'rmT
 
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） nfa_8  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 C_-%*]*,j  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single OgQntj:%lN  
   cax = x2 - x1 ovB
=Zm  
   cay = y2 - y1 Ca X^)  
   cbx = x2 - x3 aDN.gMS  
   cby = y2 - y3 .(JE-upJ"  
   mo_jj = cax * cbx + cay * cby 1*L^^%w  
   mo_ca = Sqr(cax * cax + cay * cay) tg3zXJ4k_  
   mo_cb = Sqr(cbx * cbx + cby * cby) pL8H8kn  
   cos_acb = mo_jj / (mo_ca * mo_cb) )U]:
9)  
   'ff_cos = cos_acb <r_3obRC  
   If cos_acb >= 1 Then Q*Y4m8wY  
   nn = 0 J}:&eS  
   ElseIf cos_acb <= -1 Then k{_1r;  
   nn = 3.14159265258979 C0gfJ~M)  
   Else VZHr-z$6n  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) g%ZdIKj!  
   End If b$dBV}0 L  
   'ff_angle = nn xUQdVrFU  
   ff_angle = nn * 180 / 3.14159265258979 uL bp.N8  
End Function

'判断点在区域内函数 JIVo=5c}  
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 Ob7zu"zr  
Dim aob, boc, cod, doa, sum As Single _cR6ik zW(  
  If ppx = p1x And ppy = p1y Then #,t2*tM  
     point_in = True K1/ U (A  
     Exit Function L7X7Zt8%  
  End If "v@);\-V  
  If ppx = p2x And ppy = p2y Then TFNUv<>X  
     point_in = True 4A;[sm^f  
     Exit Function yVT&rQ"{  
  End If hJecCOA)'  
   If ppx = p3x And ppy = p3y Then D% oueW  
     point_in = True NAJ '>
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     Exit Function lB=(8.  
  End If KrJ5"1=  
     |Uc<;> l  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) \)FeuLGL9  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) >s;oOo+5  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 4 U3C~J  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) )ZQHa7V  
    sum = aob + boc + cod + doa JtSuD>H`"  
    If 360.01 > sum And sum > 359.99 Then -
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       point_in = True Qk?jGXB>^  
    Else P;^y|0Nm  
       point_in = False -b@v0%Q2M*  
    End If X'YfjbGo  
End Function

'得到点半径,得到交点坐标函数 KDux$V4  
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() <ED8"~_  
    '求得中心点坐标 jVLY!7Z4  
Dim tt As String lF0K=L  
Dim rt(3) As Single :Tlf4y:/w  
    '判断是否平行 3?!G-  
   acx = p3x - p1x NYWG#4D  
   acy = p3y - p1y 6XQ*:N/4al  
   bdx = p4x - p2x |Dl*w/n  
   bdy = p4y - p2y !S
h^LYqn  
   If acx * bdy = acy * bdx Then k\sc }z8X  
      rt(0) = 0 xnJjCEZ  
      Exit Function j)g_*\tQ  
   Else C!oS=qK?]  
      '判断斜率存在否 it(LphB8  
      If p1x = p3x And p2x <> p4x Then ^</65+OT+  
         tt = "ac_n_bd_y" Fg_?!zR>6  
      ElseIf p1x <> p3x And p2x = p4x Then 4JX`>a{<  
         tt = "ac_y_bd_n" L!CX&
 
      ElseIf p1x <> p3x And p2x <> p4x Then L~@ma(TV{K  
         tt = "ac_y_bd_y" yd7lcb [  
      End If \4[c}l  
    Select Case tt +AE&GU  
         Case "ac_n_bd_y" Xz;et>UD*B  
            'bd线段方程 ^n\9AE3  
            k_bd = bdy / bdx \(.nPW]9  
            b_bd = p2y - k_bd * p2x >wz;}9v  
            p_x = p1x {DKXn`V  
            p_y = k_bd * p_x + b_bd i_j9/k  
         Case "ac_y_bd_n" F Q8RK~?`  
            'ac线段方程 >2l13^Y  
            k_ac = acy / acx -@EBbM&  
            b_ac = p1y - k_ac * p1x A[sM{i~Z  
            p_x = p2x 8@Egy%_  
            p_y = k_ac * p_x + b_ac oUW)H  
        Case "ac_y_bd_y" tIz<+T_  
           'ac，bd线段都要求 \_m\U.*  
           k_ac = acy / acx Z!C`f/h9  
           b_ac = p1y - k_ac * p1x 2ApDpH`fiJ  
           k_bd = bdy / bdx RB S[*D  
           b_bd = p2y - k_bd * p2x [}W^
4,  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) @-)<|orU4  
           p_y = k_ac * p_x + b_ac !Iw{Y'  
        End Select P!`Q_h6a  
      rt(1) = p_x ,!o\),N  
      rt(2) = p_y Cm,*bgX  
     *r)zBr  
'计算最大半径 wMlf3Uz  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) YtwmlIar`  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) U^E  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) OqfhCNAY  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) oso1uAOfp  
Dim bb(5) As Single yj}bY?4I  
  bb(1) = rr1 J6@(X8w{j  
  bb(2) = rr2 KKx&UKjV  
  bb(3) = rr3 t*Z .e.q+  
  bb(4) = rr4 .4S^nP  
  nb = rr1 }};j2  
For i = 1 To 4 J6*\>N5W  
    If nb <= bb(i) Then otmIu`h  
       nb = bb(i) y1,?ZWTayr  
    End If jRv;D#Hp  
Next i _~X8/p/Qh  
    rt(0) = Sqr(nb) ^%K1R;  
    rr = rt() +z
]:CF  
  End If lfU"SSQ  
         Z^/z  
End Function

高手啊.人才啊.

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

k"DQbUy0L  
有热压工艺方面的人才或者资料分享下； W{$+mow7S  
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 FM;;x(sg  

高手真多！

楼主威武霸气.