[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： |_2O:
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图片:2.jpg

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关键点说几个： - 5A"TNU  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） R`/nsou  
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 koaH31Q  
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 )0/DY  

以下是几个重要的函数： CK
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1.判断点在区域中函数 ^W'\8L  
2.计算夹角函数 UD"e:O_  
3.转置函数 ~Ge-7^Fo7  
4.得到区域中心点，及区域半径函数 $(C71M|CT  
5.再有就是若干个点抽取其中一部分；或者采用随机分布（该方法会有重合点，所以没采用） "i9$w\lm  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 6ffrV  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single
!%]]lxi  
   cax = x2 - x1 :aco$ZNH5  
   cay = y2 - y1 ^D/*Hp _  
   cbx = x2 - x3 oDA1#-  
   cby = y2 - y3 d0IHl!X  
   mo_jj = cax * cbx + cay * cby 7?B]X%  
   mo_ca = Sqr(cax * cax + cay * cay) @;Yb6&I;  
   mo_cb = Sqr(cbx * cbx + cby * cby) /q(+r5k \  
   cos_acb = mo_jj / (mo_ca * mo_cb) Z#MPlw0B  
   'ff_cos = cos_acb F|Jo|02  
   If cos_acb >= 1 Then ;V`~'357%  
   nn = 0 8vc4J5  
   ElseIf cos_acb <= -1 Then 5ahAp];  
   nn = 3.14159265258979 !!dNp5h`  
   Else N2=gSEY  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) eDIjcZ  
   End If Nqewtn9n  
   'ff_angle = nn _^d
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   ff_angle = nn * 180 / 3.14159265258979 q4lL7@_  
End Function

'判断点在区域内函数 bWG}>{fj  
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 44($a9oa2  
Dim aob, boc, cod, doa, sum As Single Vg&`f  
  If ppx = p1x And ppy = p1y Then l% K9K
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     point_in = True cfa#a!Y4  
     Exit Function fHR1kuy  
  End If BX2&tQSp  
  If ppx = p2x And ppy = p2y Then @N"h,(^  
     point_in = True + ECV|mkk  
     Exit Function a'XCT@B  
  End If Y |n_Ro^~  
   If ppx = p3x And ppy = p3y Then x>p=1(L  
     point_in = True J1P82=$,  
     Exit Function *+lnAxRa?  
  End If ] QtGgWtC  
     hjaI&?w  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) a{el1_DIGK  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) rh/3N8[6  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) OJQ7nChMm  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) A&)P_B1|  
    sum = aob + boc + cod + doa 1m|1eAGS{  
    If 360.01 > sum And sum > 359.99 Then $A8eMJEpL  
       point_in = True .V 9E@_(  
    Else z35n3q  
       point_in = False }DY^a'wJ-  
    End If j+PW9>Uh  
End Function

'得到点半径,得到交点坐标函数 g}L2\i688  
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() 6@; w%Ea  
    '求得中心点坐标 z| i$eF;x3  
Dim tt As String  @X  
Dim rt(3) As Single #^%Rk'W  
    '判断是否平行 d #y{eV$Q  
   acx = p3x - p1x =DGaK0n  
   acy = p3y - p1y 6aXsRhQ~  
   bdx = p4x - p2x IgR_p7['.  
   bdy = p4y - p2y u.1u/o1"  
   If acx * bdy = acy * bdx Then
b>&kL  
      rt(0) = 0 {- 7T\mj  
      Exit Function o_X"+s  
   Else C(7LwV  
      '判断斜率存在否 w'?u
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      If p1x = p3x And p2x <> p4x Then sW@4r/F>:D  
         tt = "ac_n_bd_y" (*^_wq-;  
      ElseIf p1x <> p3x And p2x = p4x Then N;;!ObVHnP  
         tt = "ac_y_bd_n" 2gg5:9  
      ElseIf p1x <> p3x And p2x <> p4x Then eWW\m[k]}  
         tt = "ac_y_bd_y" onHUi]yYu{  
      End If e J2wK3R  
    Select Case tt =/Vr,y$  
         Case "ac_n_bd_y" Bn-%).-ED  
            'bd线段方程 }7wQFKME  
            k_bd = bdy / bdx !@p@u;djJ  
            b_bd = p2y - k_bd * p2x @1^iWM j  
            p_x = p1x /'!F \ kz  
            p_y = k_bd * p_x + b_bd &*T57tE  
         Case "ac_y_bd_n" xa5I{<<U  
            'ac线段方程 AIN_.=]"?  
            k_ac = acy / acx BVC\~j j  
            b_ac = p1y - k_ac * p1x b"/P  
            p_x = p2x &yp_wW-  
            p_y = k_ac * p_x + b_ac qwiM.b5  
        Case "ac_y_bd_y" zA\DI]:+  
           'ac，bd线段都要求 .' 3;Z'%"g  
           k_ac = acy / acx Go+f0aig  
           b_ac = p1y - k_ac * p1x 0Eo*C9FP~  
           k_bd = bdy / bdx (LkGBnXE  
           b_bd = p2y - k_bd * p2x L#m1
!+J  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 0waQw7 E  
           p_y = k_ac * p_x + b_ac Qm^N}>e  
        End Select ,d&~#
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      rt(1) = p_x `?2S4lN/  
      rt(2) = p_y !!DHfAV]  
     mWfzL'*  
'计算最大半径 .y#@~H($  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) '!b1~+PV  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) !xA;(<K[^  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Ym2![FC1  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) E{(7]Wri  
Dim bb(5) As Single G0xk @SE  
  bb(1) = rr1 X<vv:  
  bb(2) = rr2 B ,e3r  
  bb(3) = rr3 mst-:F[h  
  bb(4) = rr4
$:{uF#  
  nb = rr1 OqHD=D[  
For i = 1 To 4 ?.,..p  
    If nb <= bb(i) Then /2~qm/%Q  
       nb = bb(i) bt-y6,> +E  
    End If vqJiMa j@Z  
Next i A@f`g[q  
    rt(0) = Sqr(nb) tb"
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    rr = rt() .ie\3q)  
  End If b:+.Y$%F-  
         doW_vu  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ]V0V8fU|  

&kUEnwQ-  
有热压工艺方面的人才或者资料分享下； LM\H%=*L  
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 >'ev_eAk  

高手真多！

楼主威武霸气.