[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： q'1rSK  
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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： PiM@iS  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） IF@)L>-%  
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 !v94FkS>  
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 P~=|R9t  

以下是几个重要的函数： 3C2L _ K3  
1.判断点在区域中函数 6x6PP}IX  
2.计算夹角函数 CYs:P8^  
3.转置函数 W}nD#9tL  
4.得到区域中心点，及区域半径函数 tE- s/  
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） )CEfG  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 -+-@Yq$  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 5c!~WckbJ  
   cax = x2 - x1 -dZ7;n5&_  
   cay = y2 - y1 "\)j=MI8u+  
   cbx = x2 - x3 s9@/(_  
   cby = y2 - y3 tLJ"] D1w  
   mo_jj = cax * cbx + cay * cby `(.K|l}  
   mo_ca = Sqr(cax * cax + cay * cay) q:+,'&<D  
   mo_cb = Sqr(cbx * cbx + cby * cby) Ztr,v$  
   cos_acb = mo_jj / (mo_ca * mo_cb) W{Ine> a'  
   'ff_cos = cos_acb (%YFcE)SRS  
   If cos_acb >= 1 Then "i(k8+iK  
   nn = 0 6/Q'o5>NL:  
   ElseIf cos_acb <= -1 Then oxha8CF]D  
   nn = 3.14159265258979 O4S~JE3o  
   Else kW3V"twx  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) VW}xY  
   End If VkZrb2]v  
   'ff_angle = nn lqT
TTk  
   ff_angle = nn * 180 / 3.14159265258979 w =^QIr%  
End Function

'判断点在区域内函数 aqSHo2]DX9  
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 hOx'uO`x(  
Dim aob, boc, cod, doa, sum As Single Gt3V}"B3\  
  If ppx = p1x And ppy = p1y Then 4p\<b8(9>  
     point_in = True MkEr|w'  
     Exit Function 0&mOu #l  
  End If ~Pq1@N>n  
  If ppx = p2x And ppy = p2y Then  yl0&|Ub  
     point_in = True w]J9Kv1)-  
     Exit Function wC+_S*M-K  
  End If cah1'Y  
   If ppx = p3x And ppy = p3y Then g"Mqh!{ FI  
     point_in = True ;P3sDN
  
     Exit Function O0`sg90,C  
  End If mtSOygd  
     =iO K($  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) .'k]]2%ILp  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) X
`JWYb4  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) |2z?8lx  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) $6
e&sDJ  
    sum = aob + boc + cod + doa $hZb<Xz  
    If 360.01 > sum And sum > 359.99 Then pC2ZN  
       point_in = True u.ubw(vv  
    Else G0Q}
 1  
       point_in = False W ZdEfY{  
    End If >>oR@  
End Function

'得到点半径,得到交点坐标函数 bL soKe  
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() o=@0Bd8  
    '求得中心点坐标 3C'`K,
  
Dim tt As String (7/
fsfsF  
Dim rt(3) As Single x(pq!+~K  
    '判断是否平行 mO<sw  
   acx = p3x - p1x ]wFKXZeK  
   acy = p3y - p1y Z^5j.d{e$  
   bdx = p4x - p2x ~'>RK  
   bdy = p4y - p2y `]%\Y>(a}  
   If acx * bdy = acy * bdx Then ^wNx5t  
      rt(0) = 0 :ZG^`H/X1d  
      Exit Function Ja<pvb  
   Else A`_(L|~  
      '判断斜率存在否 ^PA[fL"  
      If p1x = p3x And p2x <> p4x Then '?7th>pC  
         tt = "ac_n_bd_y" m}/LMY  
      ElseIf p1x <> p3x And p2x = p4x Then GPlAQk  
         tt = "ac_y_bd_n" 7fRL'I#[@  
      ElseIf p1x <> p3x And p2x <> p4x Then F
dwT  
         tt = "ac_y_bd_y" jm9J-%?  
      End If =+;1^sZ  
    Select Case tt AKs=2N>7  
         Case "ac_n_bd_y" lCT N dW+=  
            'bd线段方程 &*
GwA  
            k_bd = bdy / bdx ]+A>*0
#"  
            b_bd = p2y - k_bd * p2x JA0$Fz  
            p_x = p1x Y*nzOD$  
            p_y = k_bd * p_x + b_bd tKg\qbY&
 
         Case "ac_y_bd_n" {T|sU\|Q  
            'ac线段方程 8&snLOU -Q  
            k_ac = acy / acx HgL*/d  
            b_ac = p1y - k_ac * p1x w20E]4"  
            p_x = p2x D~_|`D5WK  
            p_y = k_ac * p_x + b_ac .Rl58]x~  
        Case "ac_y_bd_y" [)UF@Sq4+Q  
           'ac，bd线段都要求 GBOz,_pw  
           k_ac = acy / acx HRS|VC$tz  
           b_ac = p1y - k_ac * p1x Jg#L8>p1  
           k_bd = bdy / bdx d.y2`w
T  
           b_bd = p2y - k_bd * p2x r"#h6lYK&  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) 04-phEA2Q  
           p_y = k_ac * p_x + b_ac lOp/kGmn+  
        End Select JmN,:bI  
      rt(1) = p_x Q)N$h07R  
      rt(2) = p_y +
SCUS]  
     T{=.mW^ x  
'计算最大半径 mw}obblR  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Zur7"OkQ  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) T8Sgu6:*R  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) G"!YV#"~  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) -
bL 7M5  
Dim bb(5) As Single ^$3 ~;/|  
  bb(1) = rr1 PRmZ3  
  bb(2) = rr2 !1<x@%  
  bb(3) = rr3 ),`MAevp  
  bb(4) = rr4 3$f%{
~3  
  nb = rr1 .UNh\R?r  
For i = 1 To 4 7Cf%v`B4D  
    If nb <= bb(i) Then  (2vR8  
       nb = bb(i) BcV;EEi  
    End If n=v4m_e  
Next i H8yc<  
    rt(0) = Sqr(nb) G3QB Rh{  
    rr = rt() I
\V33Nd  
  End If Mi'Q5m  
         2,|*KN*e`W  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Tv3ZNh  

3D\.Sj%  
有热压工艺方面的人才或者资料分享下； ~2@U85"o  
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'XAcH  

高手真多！

楼主威武霸气.