[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： $&k zix  
I)Lg=n$  
9(ANh
G  

关键点说几个： hY/SR'8  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） D3(|bSca  
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 Ny p5=  
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 6&$z!60  

以下是几个重要的函数： tJbOn$]2"  
1.判断点在区域中函数 Pm%ZzU  
2.计算夹角函数 ZTMzL%i  
3.转置函数 |Tf}8e  
4.得到区域中心点，及区域半径函数 kHm1aE<  
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） 86vk"  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 D8paIp  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ( y'i{:B  
   cax = x2 - x1  ORp6  
   cay = y2 - y1 FavU"QU&|  
   cbx = x2 - x3 ?b^VEp.;}  
   cby = y2 - y3 y%v<Cp@R  
   mo_jj = cax * cbx + cay * cby xXp\U'Ad~~  
   mo_ca = Sqr(cax * cax + cay * cay) {KdC51"Nv  
   mo_cb = Sqr(cbx * cbx + cby * cby)  ]i=-/  
   cos_acb = mo_jj / (mo_ca * mo_cb) Lk4&&5q  
   'ff_cos = cos_acb -Z4J?b  
   If cos_acb >= 1 Then &
gIu<*u<  
   nn = 0 gE`G3kgn{  
   ElseIf cos_acb <= -1 Then D2[uex  
   nn = 3.14159265258979 =LZj6'  
   Else `IFt;Ja\6  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) Kg~<
h B6  
   End If "n7rbh3VW  
   'ff_angle = nn (GMKIw2  
   ff_angle = nn * 180 / 3.14159265258979 HI,1~Jw+  
End Function

'判断点在区域内函数 %+Z0$Q  
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 w4:n(.;HK  
Dim aob, boc, cod, doa, sum As Single e ! 6SJ7xC  
  If ppx = p1x And ppy = p1y Then ^G~W}z?-  
     point_in = True n
&r-  
     Exit Function InH
R>,  
  End If !jU<(eY  
  If ppx = p2x And ppy = p2y Then {QM;%f  
     point_in = True c^6
v7wT5  
     Exit Function qaA\.h7  
  End If wkdd&Nw;  
   If ppx = p3x And ppy = p3y Then Y H 2iV  
     point_in = True Z,lUO.  
     Exit Function $P866F  
  End If ed'}ReLK  
     Jk}L+Xvv  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Ke&lGf"5  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) f`:e#x  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) E,c~.jYc  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) k]qZOO}  
    sum = aob + boc + cod + doa JAC W#'4hV  
    If 360.01 > sum And sum > 359.99 Then 7. G  
       point_in = True p87s99  
    Else `]LaX&u  
       point_in = False e&OMW,7  
    End If U`W^w%  
End Function

'得到点半径,得到交点坐标函数 cuq7eMG6z  
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() (PsA[>F  
    '求得中心点坐标 nd3]&occ  
Dim tt As String ZNOoyWYi5  
Dim rt(3) As Single c*RZbE9k  
    '判断是否平行 S/~6%uJ  
   acx = p3x - p1x 3[SN[faS  
   acy = p3y - p1y reu[}k~
  
   bdx = p4x - p2x ^nbze  
   bdy = p4y - p2y Jgtvia  
   If acx * bdy = acy * bdx Then z9w@-])  
      rt(0) = 0 $rFv(Qc^=  
      Exit Function iL|*g3`-f  
   Else iN`/pW/JE  
      '判断斜率存在否 /D1Bf:'(  
      If p1x = p3x And p2x <> p4x Then )6bxP&k  
         tt = "ac_n_bd_y" h,FP,w;G  
      ElseIf p1x <> p3x And p2x = p4x Then ^>%=/RX  
         tt = "ac_y_bd_n" "{z9 L+  
      ElseIf p1x <> p3x And p2x <> p4x Then 1G.+)*:3  
         tt = "ac_y_bd_y" 5CU< ?  
      End If 45kMIh~~X  
    Select Case tt B susXW$  
         Case "ac_n_bd_y" ^3=8*Xr  
            'bd线段方程 oYJ&BPuA'  
            k_bd = bdy / bdx k\ I$ve"*  
            b_bd = p2y - k_bd * p2x Zr}`W\  
            p_x = p1x Y1`.  
            p_y = k_bd * p_x + b_bd mNb+V/*x3  
         Case "ac_y_bd_n" 2<ef&?ljk  
            'ac线段方程 }[LK/@h  
            k_ac = acy / acx B1nb23SY T  
            b_ac = p1y - k_ac * p1x @'C)ss=kj  
            p_x = p2x *zX<`E  
            p_y = k_ac * p_x + b_ac O])/kS`  
        Case "ac_y_bd_y" JYv&It  
           'ac，bd线段都要求 f\r$T Nd6  
           k_ac = acy / acx A: 0] n  
           b_ac = p1y - k_ac * p1x {E6W]Mno  
           k_bd = bdy / bdx {/QpEd>3+  
           b_bd = p2y - k_bd * p2x ZN1QTb
 
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ~RvU+D  
           p_y = k_ac * p_x + b_ac )B}]0`z:P  
        End Select * +OAc`8  
      rt(1) = p_x _F@FcFG1Z*  
      rt(2) = p_y A]H+rxg  
     l\$C)q6O  
'计算最大半径 _^P>@ ^  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) /)oxuk&}c  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) "hy#L 0\t  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) c#HocwP@  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) V
8n}"  
Dim bb(5) As Single Ho\+xX  
  bb(1) = rr1 =WO{h48]  
  bb(2) = rr2  oK
(ua  
  bb(3) = rr3 FfD2 &(-R  
  bb(4) = rr4 OVj,qL)  
  nb = rr1 k?J}-+Bm[|  
For i = 1 To 4 ^xqh!  
    If nb <= bb(i) Then :"QRB#EC%  
       nb = bb(i) mY`b|cS3p$  
    End If |9_e2OwH  
Next i DcOu=Y> 1  
    rt(0) = Sqr(nb) !2{MWj  
    rr = rt() "4"L"lJ   
  End If !0fK*qIL  
         YDmFR,047  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ikofJl]9  

?5+=  
有热压工艺方面的人才或者资料分享下； (IEtjv}D  
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 EmH2 Dbw  

高手真多！

楼主威武霸气.