[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： svyC(m)'  
{H $\,  
6kT l(+  

关键点说几个： yc]ni.Hz  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） >Fx$Rty  
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 cw"x0 RS  
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 DGHX:Ft#  

以下是几个重要的函数： `Q(ac| 0  
1.判断点在区域中函数 }%k"qW<Y  
2.计算夹角函数 }lpcbm  
3.转置函数 ~O1*]  
4.得到区域中心点，及区域半径函数 #(aROTV5a  
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） 3<mv9U(  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 "apv)xdW  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single qsk71L  
   cax = x2 - x1 $}KYpSV  
   cay = y2 - y1 t91CxZQ^s  
   cbx = x2 - x3 rM=Hd/ki5  
   cby = y2 - y3 C>K/C!5?  
   mo_jj = cax * cbx + cay * cby rXm!3E6JL  
   mo_ca = Sqr(cax * cax + cay * cay) wd#AA#J;*  
   mo_cb = Sqr(cbx * cbx + cby * cby) E?9_i :IX  
   cos_acb = mo_jj / (mo_ca * mo_cb) ]oya<C6pR  
   'ff_cos = cos_acb jQ^Ib]"K  
   If cos_acb >= 1 Then <M&]*|q>g%  
   nn = 0 FBY~Z$o0.  
   ElseIf cos_acb <= -1 Then .ERO*Tj  
   nn = 3.14159265258979 ^U`q1Pg5  
   Else =u'/\nxCF  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) GUp51*#XR  
   End If &pba~X.u  
   'ff_angle = nn S~TJF}[k^6  
   ff_angle = nn * 180 / 3.14159265258979 ~o2{Wn["  
End Function

'判断点在区域内函数 l|fd,  
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 (,TO|  
Dim aob, boc, cod, doa, sum As Single nx+& {hn(  
  If ppx = p1x And ppy = p1y Then '9[_w$~(  
     point_in = True (\I =v".  
     Exit Function &%bX&;ECzf  
  End If 8)tyn'~i  
  If ppx = p2x And ppy = p2y Then 2?ednMoE  
     point_in = True kL3=7t^ 1  
     Exit Function co@8w!W  
  End If c"$_V[m  
   If ppx = p3x And ppy = p3y Then ^\6UTnS.  
     point_in = True JQ1VCG  
     Exit Function POG5x  
  End If ( 0h]<7  
     P>kx{^  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) B)|s.Ez  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) l^"G\ZVI  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) p4Y9$(X  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) W!(Q_B  
    sum = aob + boc + cod + doa a&[nVu+  
    If 360.01 > sum And sum > 359.99 Then gi6_la+  
       point_in = True +vnaEy  
    Else =e+go ]87x  
       point_in = False =ht@7z8QM  
    End If ?7+2i\L  
End Function

'得到点半径,得到交点坐标函数 ;1 fML,8  
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?!"15  
    '求得中心点坐标 S!]}}fKEFm  
Dim tt As String 9T1G/0k-  
Dim rt(3) As Single |H4'*NP"  
    '判断是否平行 4HJrR^  
   acx = p3x - p1x %([c4el>\F  
   acy = p3y - p1y iiTUhO )  
   bdx = p4x - p2x "mf;k^sqS  
   bdy = p4y - p2y ;'p'8lts  
   If acx * bdy = acy * bdx Then 7`}z7nk  
      rt(0) = 0 E(8g(?4  
      Exit Function y)}aySQK^  
   Else +9X[gef8  
      '判断斜率存在否 1dcy+ !>  
      If p1x = p3x And p2x <> p4x Then OOCeZ3yF(
 
         tt = "ac_n_bd_y"
\abl|;fj  
      ElseIf p1x <> p3x And p2x = p4x Then A M2M87{t  
         tt = "ac_y_bd_n" 4=Ey\Px  
      ElseIf p1x <> p3x And p2x <> p4x Then >`:+d'Jv0  
         tt = "ac_y_bd_y" dc)Gk  
      End If 0FOf *Lz  
    Select Case tt GpL#,qYc  
         Case "ac_n_bd_y" D6u>[Z[T  
            'bd线段方程 IoA;q)  
            k_bd = bdy / bdx I,eyL$x  
            b_bd = p2y - k_bd * p2x tp<VOUa  
            p_x = p1x g&>Hy!v,  
            p_y = k_bd * p_x + b_bd l+6(|"md  
         Case "ac_y_bd_n" sFQ|lU"
n  
            'ac线段方程 ShpnFuH  
            k_ac = acy / acx >$DqG$D  
            b_ac = p1y - k_ac * p1x (4LLTf0  
            p_x = p2x Sg-xm+iSDt  
            p_y = k_ac * p_x + b_ac eXK`%'  
        Case "ac_y_bd_y" ?=kswf  
           'ac，bd线段都要求 :3f2^(b~^  
           k_ac = acy / acx C)
j)j&  
           b_ac = p1y - k_ac * p1x %jkPrI  
           k_bd = bdy / bdx e`r;`a&  
           b_bd = p2y - k_bd * p2x ,X^_w g  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) TpgBS4q  
           p_y = k_ac * p_x + b_ac 37xxVbik  
        End Select p0K;m%  
      rt(1) = p_x iC]lO  
      rt(2) = p_y cAS_?"V a  
     3;NRW+  
'计算最大半径 B! V{.p  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) y6}):|  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) lWvd"Vlt  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) gf?^yP ;V  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 5>)jNtZ  
Dim bb(5) As Single 7h1gU  
  bb(1) = rr1 NrcCUZ .:N  
  bb(2) = rr2 tHbPd.^  
  bb(3) = rr3 )\vHIXnfJ1  
  bb(4) = rr4 OU@x1G{Cy  
  nb = rr1 s.'\&B[  
For i = 1 To 4 P-[K*/bPw  
    If nb <= bb(i) Then <q2nZI^  
       nb = bb(i) Cw $^w  
    End If z :v, Vu  
Next i Ky#B'Bh}`g  
    rt(0) = Sqr(nb) +o]BjgG  
    rr = rt() 'hO;sL  
  End If ?bAFYF0!I  
         ~uadivli  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  fA_%8CjI  

.^~l_LkA  
有热压工艺方面的人才或者资料分享下； %aH$Tb%`hc  
我公司主要做透镜类产品，现在有客户要审核我公司的导光膜工艺，头疼 g(1B W#$  

高手真多！

楼主威武霸气.