[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： P5UL4uyl  
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关键点说几个： \XZ/v*d0  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） gi1^3R[  
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 8<QdMkI  
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 Hquc o  

以下是几个重要的函数： *XIF)Q=<>  
1.判断点在区域中函数 inMA:x}cF1  
2.计算夹角函数 '-Vt|O_Q  
3.转置函数 <h0?tv]  
4.得到区域中心点，及区域半径函数 |ATvS2  
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） D2Kp|F;  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 7x|9n  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single dy%;W%   
   cax = x2 - x1 9
8IJu  
   cay = y2 - y1 <l
Pm1/8  
   cbx = x2 - x3 Bq%Jh  
   cby = y2 - y3 Z&+ g;
(g  
   mo_jj = cax * cbx + cay * cby +V ;l6D  
   mo_ca = Sqr(cax * cax + cay * cay) wDal5GJp  
   mo_cb = Sqr(cbx * cbx + cby * cby) \/r}]Vz  
   cos_acb = mo_jj / (mo_ca * mo_cb) "c
%0P"u  
   'ff_cos = cos_acb 3nO]Ge"w'n  
   If cos_acb >= 1 Then X9W@&zQ  
   nn = 0 :+^lJ&{U  
   ElseIf cos_acb <= -1 Then Q4#m\KK;i9  
   nn = 3.14159265258979 y}" O U  
   Else ?jv
/TBZX4  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) &N^9JxN?8  
   End If O`IQ(,yef  
   'ff_angle = nn P^~yzI  
   ff_angle = nn * 180 / 3.14159265258979 _^Ubs>d=*  
End Function

'判断点在区域内函数 yW=::=  
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 _}Ac n$  
Dim aob, boc, cod, doa, sum As Single @1roe G  
  If ppx = p1x And ppy = p1y Then D
N>[\hg  
     point_in = True EHJ.T~X  
     Exit Function J/y83@  
  End If Ko<:Z)PS  
  If ppx = p2x And ppy = p2y Then b|:YIXml  
     point_in = True UERLtSQ  
     Exit Function z#wkiCRYm  
  End If 8b&/k8i:  
   If ppx = p3x And ppy = p3y Then 5{X<y#vAC0  
     point_in = True lfow1WRF  
     Exit Function y'.p&QH'`  
  End If Woym/[i  
     Q~ w|#  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) rH Lm\3  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Jq-]7N%k/  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) L ca}J&x]^  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) Gx/Oi)&/  
    sum = aob + boc + cod + doa >1Ibc=}g  
    If 360.01 > sum And sum > 359.99 Then l_d5oAh   
       point_in = True kS);xA8s]  
    Else K\Wkoi5  
       point_in = False "%w u2%i  
    End If 0Th&iA4  
End Function

'得到点半径,得到交点坐标函数 zwjgE6  
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() +'HqgSPyb  
    '求得中心点坐标 AQvudx
)@"  
Dim tt As String k="i;! Ge  
Dim rt(3) As Single F^;ez/Gl  
    '判断是否平行 |u<7?)mp  
   acx = p3x - p1x R&k<AZ  
   acy = p3y - p1y m<Dy<((_I  
   bdx = p4x - p2x &j"?\f?  
   bdy = p4y - p2y YjKxb9  
   If acx * bdy = acy * bdx Then ",; H`V  
      rt(0) = 0 C_JNX9wv  
      Exit Function '-~~-}= sJ  
   Else k?^z;Tlvw  
      '判断斜率存在否 (hbyEQhF  
      If p1x = p3x And p2x <> p4x Then }Zn}  
         tt = "ac_n_bd_y" ]{@-HTt  
      ElseIf p1x <> p3x And p2x = p4x Then $<EM+oJ|ER  
         tt = "ac_y_bd_n" Z@!+v19^  
      ElseIf p1x <> p3x And p2x <> p4x Then pl?`8@dI  
         tt = "ac_y_bd_y" hHnYtq  
      End If h*](a_0  
    Select Case tt 5U$0F$BBp  
         Case "ac_n_bd_y" +[mk<pQ  
            'bd线段方程 HIZe0%WPw  
            k_bd = bdy / bdx .#8 JCY  
            b_bd = p2y - k_bd * p2x 0x@ mZ  
            p_x = p1x ukyZes8o K  
            p_y = k_bd * p_x + b_bd Tyx_/pJT  
         Case "ac_y_bd_n" 8&slu{M- t  
            'ac线段方程 /a4{?? #e  
            k_ac = acy / acx *z8\Lnv~k  
            b_ac = p1y - k_ac * p1x kt:! 7  
            p_x = p2x F={a;Dvrn  
            p_y = k_ac * p_x + b_ac Ad_hKO  
        Case "ac_y_bd_y" XXa|BZ1RX  
           'ac，bd线段都要求 (f"4,b^]  
           k_ac = acy / acx &Z%?!.4j@  
           b_ac = p1y - k_ac * p1x U>N1Od4vTO  
           k_bd = bdy / bdx MQ6KN(?\ZL  
           b_bd = p2y - k_bd * p2x 0@oJFJrO  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) y}|s&4Sq  
           p_y = k_ac * p_x + b_ac 0 kW,I  
        End Select C~/a-  
      rt(1) = p_x pv|G^,>#  
      rt(2) = p_y vEJbA  
     0L52#;?Si"  
'计算最大半径 /%^#8<=|U  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) /j.9$H'y  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 7qS)c}Q\  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) PEZ!n.'S  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) E7hY8#G  
Dim bb(5) As Single 3^yK!-Wp(  
  bb(1) = rr1 c]!V'#U  
  bb(2) = rr2 N;`n@9BF  
  bb(3) = rr3 k8zI(5.>
 
  bb(4) = rr4 UkFC~17P  
  nb = rr1 Qo|\-y-#  
For i = 1 To 4 RZTiw^  
    If nb <= bb(i) Then H<+TR6k<  
       nb = bb(i)
9hyn`u.  
    End If U 6)#}
 
Next i Jln:`!#fDf  
    rt(0) = Sqr(nb) |vj/Wwr  
    rr = rt() |2A:eI8 ^  
  End If YGNP53CU  
         `Urhy#LC  
End Function

高手啊.人才啊.

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

!`r$"}g  
有热压工艺方面的人才或者资料分享下； v` r:=K  
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 p]"4#q\(  

高手真多！

楼主威武霸气.