[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： ')ZZ)&U>z  
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关键点说几个： V^_U=Ed@M  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） lqvP Dz  
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 0B"_St}3D  
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 <GSp%r  

以下是几个重要的函数： \zhCGDm1_  
1.判断点在区域中函数 p,14'HS%@  
2.计算夹角函数 PNH>LT^  
3.转置函数 iB
+ _+A  
4.得到区域中心点，及区域半径函数 J7@Q;gcl:  
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） ON"p^o>/_?  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 L;fz7?_j  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single =69sWcC8  
   cax = x2 - x1 YD#L@:&gv  
   cay = y2 - y1 !ZY1
AhGZ  
   cbx = x2 - x3 f;!L\$yKy  
   cby = y2 - y3 /sSM<r]5j  
   mo_jj = cax * cbx + cay * cby .Dy2O*`  
   mo_ca = Sqr(cax * cax + cay * cay) <g64N  
   mo_cb = Sqr(cbx * cbx + cby * cby) VUD9ZyPw  
   cos_acb = mo_jj / (mo_ca * mo_cb) ,My'_"S?  
   'ff_cos = cos_acb B^.:dn  
   If cos_acb >= 1 Then uM9Gj@_  
   nn = 0 _p<wATv?7t  
   ElseIf cos_acb <= -1 Then 5kCXy$"%  
   nn = 3.14159265258979 Rb0{W]opt+  
   Else (]-RL A>  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ]'Gz~Z%>F  
   End If =-avzuy#  
   'ff_angle = nn pv^:G;  
   ff_angle = nn * 180 / 3.14159265258979 ;8cTy8  
End Function

'判断点在区域内函数 azG"Mt|7Z  
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 J^zB5W,)  
Dim aob, boc, cod, doa, sum As Single &td   
  If ppx = p1x And ppy = p1y Then WsT  
     point_in = True >|mZu)HIY;  
     Exit Function 0iKAg  
  End If s<5PsR  
  If ppx = p2x And ppy = p2y Then I(b]V!mj:  
     point_in = True |g"K7XfM4  
     Exit Function HIda%D  
  End If <VhD>4f{]  
   If ppx = p3x And ppy = p3y Then ),2|TlQ  
     point_in = True sYB2{w   
     Exit Function ;,xM*  
  End If k h6n(B\  
     GQ sE5Vb  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y)  p+-IvU  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) /)sP<WPQ6  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) KfQ?b_H.  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) D#[<N  
    sum = aob + boc + cod + doa u[nLrEnD  
    If 360.01 > sum And sum > 359.99 Then BW ux!  
       point_in = True RQ4+EW1
G  
    Else A.(e=;0bu  
       point_in = False GE=PaYz  
    End If L0Ajj=  
End Function

'得到点半径,得到交点坐标函数 0D0uzUD-
 
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() z`,dEGfh^  
    '求得中心点坐标 lUw=YM  
Dim tt As String h)s&Nqg1B  
Dim rt(3) As Single @h(Z;  
    '判断是否平行 3mL(xpT.8z  
   acx = p3x - p1x )5u#'5I>  
   acy = p3y - p1y h~O^~"jc  
   bdx = p4x - p2x l nJ  
   bdy = p4y - p2y cv. j  
   If acx * bdy = acy * bdx Then V7D<'!  
      rt(0) = 0 fP 3t0cp  
      Exit Function -J0I2D  
   Else _|#P~Ft  
      '判断斜率存在否 M|R\[ Zf  
      If p1x = p3x And p2x <> p4x Then Hm+VGH'H?  
         tt = "ac_n_bd_y" a6?t?:~|  
      ElseIf p1x <> p3x And p2x = p4x Then !v
uun |  
         tt = "ac_y_bd_n" 'r1X6?dJ  
      ElseIf p1x <> p3x And p2x <> p4x Then /?a9g>G%N  
         tt = "ac_y_bd_y" ,l.+$G  
      End If [7 t  
    Select Case tt E:[!)UG|y  
         Case "ac_n_bd_y" /JIVp_-p  
            'bd线段方程 !E,|EdIr  
            k_bd = bdy / bdx tH:?aP*2  
            b_bd = p2y - k_bd * p2x [}4\CWM  
            p_x = p1x 09i77  
            p_y = k_bd * p_x + b_bd r4fd@<=g  
         Case "ac_y_bd_n" n^nQrRIp  
            'ac线段方程 yM7FR);  
            k_ac = acy / acx {c7@`AV]  
            b_ac = p1y - k_ac * p1x - %?>1n  
            p_x = p2x YoZd,} i  
            p_y = k_ac * p_x + b_ac XW+-E^d  
        Case "ac_y_bd_y" :*-O;Yw?S@  
           'ac，bd线段都要求 >fD%lq;  
           k_ac = acy / acx 5i'KGL  
           b_ac = p1y - k_ac * p1x =6N=5JePB  
           k_bd = bdy / bdx "B9zQ,[Q  
           b_bd = p2y - k_bd * p2x rddn"~lm1  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) @6-3D/=  
           p_y = k_ac * p_x + b_ac Jg$ NYs.xZ  
        End Select !/1~  
      rt(1) = p_x bPMf='F{r  
      rt(2) = p_y "#pN  
     WGo ryvEx  
'计算最大半径 JB!*{{  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) #v4^,$k>  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Y5*A,piq  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) YVk +zt~S  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) \aN5:Yy  
Dim bb(5) As Single '1zC|:,  
  bb(1) = rr1 DLO#_t^v.  
  bb(2) = rr2 fT=ZiHJ3Gu  
  bb(3) = rr3 AP9\]qZ(7  
  bb(4) = rr4 U^-RyE!}  
  nb = rr1 )=5*iWe  
For i = 1 To 4 }I
Q![T5  
    If nb <= bb(i) Then mXu";?2  
       nb = bb(i) 5nK|0vv%2  
    End If ncpA\E;ff^  
Next i )}k"7"  
    rt(0) = Sqr(nb) @f-rS{  
    rr = rt() V1A7hRjxvG  
  End If S)"vyGv  
         ,S?:lQuK5  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  GZ"J6/0-|  

N_E:?Jo  
有热压工艺方面的人才或者资料分享下； 7me1:}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 .fS1  

高手真多！

楼主威武霸气.