[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： h=RDO  
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关键点说几个： ~5#)N{GbY  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） sB*o)8  
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 I^0t2[M  
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 6nw&$I  

以下是几个重要的函数： C!UEXj`l9  
1.判断点在区域中函数 C-#.RI7  
2.计算夹角函数 1$[
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3.转置函数 (wL3 +  
4.得到区域中心点，及区域半径函数 Ee?;i<u  
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） _nX%#/{  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 kMS5h~D[  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single |!b9b(_j9  
   cax = x2 - x1 X%J%A-k]  
   cay = y2 - y1 Jr?!Mh-  
   cbx = x2 - x3 ;eR{tH /4  
   cby = y2 - y3 ,kE=TR.|  
   mo_jj = cax * cbx + cay * cby AF[>fMI  
   mo_ca = Sqr(cax * cax + cay * cay) +u#Sl)F  
   mo_cb = Sqr(cbx * cbx + cby * cby) @zs1>\J7  
   cos_acb = mo_jj / (mo_ca * mo_cb) q%.bnF/Yd  
   'ff_cos = cos_acb 8nu> gA  
   If cos_acb >= 1 Then |uQ[W17^N  
   nn = 0 ]PVto\B=  
   ElseIf cos_acb <= -1 Then @U7Dunu*f  
   nn = 3.14159265258979 syMm`/*/G-  
   Else }bgo )<i  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1)
9RcM$[~  
   End If
rIPl6,w~  
   'ff_angle = nn <,-,?  
   ff_angle = nn * 180 / 3.14159265258979 ^je528%H  
End Function

'判断点在区域内函数 TRCI\  
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 VK$zq5D  
Dim aob, boc, cod, doa, sum As Single kpWzMd &RK  
  If ppx = p1x And ppy = p1y Then  I9Om#m  
     point_in = True um{e&5jk  
     Exit Function 'W+i[Ep5Q  
  End If lG <yJ~{  
  If ppx = p2x And ppy = p2y Then }_vM&.GFlL  
     point_in = True ?GfxBZ
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     Exit Function #O><A&FrF`  
  End If VX&WlG`wa  
   If ppx = p3x And ppy = p3y Then @oA0{&G{  
     point_in = True A{t"M-<  
     Exit Function V:QdQ;c  
  End If W\a!Q]pV  
     Ki63Ox^O  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) TL]
bY'%  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Yim#Pq&_  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 8}9Ob~on  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) [Q=4P*G}X  
    sum = aob + boc + cod + doa `L;OY 4  
    If 360.01 > sum And sum > 359.99 Then M(NH9EE  
       point_in = True 2\,e
 
    Else h%/ssB  
       point_in = False -2z,cj&E{  
    End If n'Bmz  
End Function

'得到点半径,得到交点坐标函数 $>EqH?EQ  
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() |c=d;+  
    '求得中心点坐标 F@Pem  
Dim tt As String  &Q<EfB  
Dim rt(3) As Single sK#H4y+<  
    '判断是否平行 P`z7@9*j  
   acx = p3x - p1x FzA{UO  
   acy = p3y - p1y V;P1nL4L  
   bdx = p4x - p2x W3"vTZJF  
   bdy = p4y - p2y PVZEB  
   If acx * bdy = acy * bdx Then >J9IRAm}sc  
      rt(0) = 0 j`{fB}  
      Exit Function j-j'phK  
   Else rA[nUJ,  
      '判断斜率存在否 %C6|-?TAd  
      If p1x = p3x And p2x <> p4x Then ^NY+wR5Sn  
         tt = "ac_n_bd_y" /j$$0F>s7  
      ElseIf p1x <> p3x And p2x = p4x Then H&w(]PDh  
         tt = "ac_y_bd_n" 3Gj(z:)b  
      ElseIf p1x <> p3x And p2x <> p4x Then d$4WK)U  
         tt = "ac_y_bd_y" O.]_Ry\OXA  
      End If gQu\[e%mVo  
    Select Case tt )hePN4edj  
         Case "ac_n_bd_y" /DK*yS  
            'bd线段方程 \a\^(`3a[  
            k_bd = bdy / bdx H
f;RIl2F  
            b_bd = p2y - k_bd * p2x \MfR #k0  
            p_x = p1x |}l@w+N3  
            p_y = k_bd * p_x + b_bd 6-D%)Z(  
         Case "ac_y_bd_n" D WsCYo  
            'ac线段方程 YCtIeq%  
            k_ac = acy / acx J11dqj  
            b_ac = p1y - k_ac * p1x 8''9@xz  
            p_x = p2x YhEiN. ~  
            p_y = k_ac * p_x + b_ac Iz 1*4@  
        Case "ac_y_bd_y" [3Wsc`Q  
           'ac，bd线段都要求 wa9'2a1?  
           k_ac = acy / acx ]|H]9mys98  
           b_ac = p1y - k_ac * p1x mvUVy1-c  
           k_bd = bdy / bdx }w;Q^EU  
           b_bd = p2y - k_bd * p2x U/}AiCdj@  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) r0rJ.}!  
           p_y = k_ac * p_x + b_ac I|Vk.,  
        End Select B7NmET4  
      rt(1) = p_x iuvtj]/  
      rt(2) = p_y XHU<4l:kl  
     t't^E,E .@  
'计算最大半径 z:0-aDeM  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) T2c_vY  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) |6\FI?  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 7vB9K_wCI  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) AJJ%gxqGq  
Dim bb(5) As Single 'XC&BW
J  
  bb(1) = rr1 6)tB{:h&~0  
  bb(2) = rr2 &!3VqHQ`  
  bb(3) = rr3 Gnuo-8lb  
  bb(4) = rr4 U'f$YVc  
  nb = rr1 d;@E~~o?B]  
For i = 1 To 4 e<ism?WG  
    If nb <= bb(i) Then T%N~oa  
       nb = bb(i) Rx@%cuP*  
    End If 4]|9!=\  
Next i t-?KKU8  
    rt(0) = Sqr(nb) p*(U*8Q  
    rr = rt() Q6s5#7h'"  
  End If p@!@^1j=  
         +=,4@I%  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  8HRPJSO~g  

Oih2UrF  
有热压工艺方面的人才或者资料分享下； yzM+28}L<I  
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 ?od}~G4
s#  

高手真多！

楼主威武霸气.