[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： &io*pmUm6  
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图片:2.jpg

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关键点说几个： 4GTB82V$  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） dGBVkb4]T  
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 \Z%V)ZRi=  
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 q(cSHHv+  

以下是几个重要的函数： =jN9PzLk  
1.判断点在区域中函数 z?i{2Fz6  
2.计算夹角函数 IHlTp0?
  
3.转置函数 woCFkO;'O  
4.得到区域中心点，及区域半径函数 H]/!J]  
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） geB]~/-p  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ayvHS&h  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single rWo&I_{  
   cax = x2 - x1 Y +9OP  
   cay = y2 - y1 \P` mV9P  
   cbx = x2 - x3 +`)4jx)r/  
   cby = y2 - y3 )Cm7v@B   
   mo_jj = cax * cbx + cay * cby !{, `h<  
   mo_ca = Sqr(cax * cax + cay * cay) 8P#jC$<  
   mo_cb = Sqr(cbx * cbx + cby * cby) L)Iv]u  
   cos_acb = mo_jj / (mo_ca * mo_cb) Q7-d]xJ^  
   'ff_cos = cos_acb Z-D4~
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   If cos_acb >= 1 Then #I(Ho:b  
   nn = 0 m|5yET  
   ElseIf cos_acb <= -1 Then ucV
n 
`  
   nn = 3.14159265258979 uqg#(ADy?R  
   Else BCK0fk~  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) A!&hjV`  
   End If <!r0[bKz@  
   'ff_angle = nn K!MIA  
   ff_angle = nn * 180 / 3.14159265258979 f*}H4H EO  
End Function

'判断点在区域内函数 DfNX@gbo  
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 fq"<=  
Dim aob, boc, cod, doa, sum As Single rz@;Zn  
  If ppx = p1x And ppy = p1y Then 0rtP :Nj$  
     point_in = True ;P{HePs=)  
     Exit Function KF#,Q  
  End If c9
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  If ppx = p2x And ppy = p2y Then >,Zf3M  
     point_in = True ^mu?V-4  
     Exit Function J,bE[52
 
  End If SbLx`]rI  
   If ppx = p3x And ppy = p3y Then *Hnk,?kPq  
     point_in = True Y0||>LX  
     Exit Function !\0U
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  End If +H7lkbW
  
     7;UU
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    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) -2dk8]KB]  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) CqRG !J  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) L(yR"A{FsE  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) (>E70|T  
    sum = aob + boc + cod + doa 0pSqk/  
    If 360.01 > sum And sum > 359.99 Then @GB~rfB[  
       point_in = True =vv4;az X  
    Else #sOkD  
       point_in = False 0koC;(<n  
    End If YmS}*>oz  
End Function

'得到点半径,得到交点坐标函数 VPB,8zb]  
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*W\  
    '求得中心点坐标 z8SrZ#mg  
Dim tt As String 4v"9I(  
Dim rt(3) As Single ?]`kc  
    '判断是否平行 1CkBfK  
   acx = p3x - p1x _`/:gkZS  
   acy = p3y - p1y 1]L 0r  
   bdx = p4x - p2x bIR AwktD  
   bdy = p4y - p2y
u;fD4CA  
   If acx * bdy = acy * bdx Then rKR2v(c  
      rt(0) = 0 U{2[nF  
      Exit Function 8\+Q*7~@i  
   Else ,qS-T'[v,(  
      '判断斜率存在否 m'))prl  
      If p1x = p3x And p2x <> p4x Then M(l>^N8W8  
         tt = "ac_n_bd_y" f\W1u#;u)  
      ElseIf p1x <> p3x And p2x = p4x Then 0]C~CvO  
         tt = "ac_y_bd_n" pq 4/>WzE  
      ElseIf p1x <> p3x And p2x <> p4x Then Pa.D+  
         tt = "ac_y_bd_y" +ht -Bl  
      End If ##gq{hgjb$  
    Select Case tt hrpql_9.  
         Case "ac_n_bd_y" e12.suv  
            'bd线段方程 Oy:;v7  
            k_bd = bdy / bdx x \.qzi  
            b_bd = p2y - k_bd * p2x 6!|-,t><  
            p_x = p1x a9CY,+z5B  
            p_y = k_bd * p_x + b_bd SjT8eH #  
         Case "ac_y_bd_n" jl;%?bx  
            'ac线段方程 Sga/i?!  
            k_ac = acy / acx tpJe1J<  
            b_ac = p1y - k_ac * p1x ~kdxJP"  
            p_x = p2x O@@=ZyYwc  
            p_y = k_ac * p_x + b_ac %!5[3b'h  
        Case "ac_y_bd_y" 1}A1P&2>  
           'ac，bd线段都要求 481SDG[b  
           k_ac = acy / acx :G/T{87H  
           b_ac = p1y - k_ac * p1x n%o"n?e  
           k_bd = bdy / bdx $ e<&7  
           b_bd = p2y - k_bd * p2x A4lh`n5%  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) O1+2Z\F  
           p_y = k_ac * p_x + b_ac q[l!kC+Eh  
        End Select Q+ r4  
      rt(1) = p_x kY8aK8M  
      rt(2) = p_y EgAM,
\  
     >wiW(Ki}  
'计算最大半径 :Ogt{t  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) VKW9Rn9Qg  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) l6^IX0&p  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) C]ev"Am_)  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Gj6(ycaS  
Dim bb(5) As Single UADD 7d  
  bb(1) = rr1 %F'*0<  
  bb(2) = rr2 
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  bb(3) = rr3 =-XI)JV#  
  bb(4) = rr4 #7!P3j  
  nb = rr1 P&

Vqr  
For i = 1 To 4 Q/oel'O*x  
    If nb <= bb(i) Then |5o0N8!b[  
       nb = bb(i) cO9aT  
    End If 0_d,sC?V  
Next i !"w1Pv,  
    rt(0) = Sqr(nb) "PM!03rb  
    rr = rt() s8,{8k  
  End If ku=o$I8K  
         M=Y}w?  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  S|U/m m  

&%QtUPvr9  
有热压工艺方面的人才或者资料分享下； Z-(Vfp
4  
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 }nrl2yp:%  

高手真多！

楼主威武霸气.