[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@1g=q  
s*.&DN  
;kiL`K  

关键点说几个： Ct,|g =(  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 2<' 1m{  
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 ~xaPq=AH  
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 ,Z6\%:/  

以下是几个重要的函数： :#=XT9  
1.判断点在区域中函数 ES&"zjr$  
2.计算夹角函数 op]HF4  
3.转置函数 1:r
8p6  
4.得到区域中心点，及区域半径函数 Q-M"+HO  
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） pN
^^U[  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 c0%.GcF0{  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ?UGA-^E1  
   cax = x2 - x1 k;bdzcMkQ  
   cay = y2 - y1 {!`0i  
   cbx = x2 - x3 3RyB 0 n  
   cby = y2 - y3 R!8qkG  
   mo_jj = cax * cbx + cay * cby )Kw Gb&l&  
   mo_ca = Sqr(cax * cax + cay * cay) A=S_5y  
   mo_cb = Sqr(cbx * cbx + cby * cby) nr t3wqJ
  
   cos_acb = mo_jj / (mo_ca * mo_cb)  KDODUohC  
   'ff_cos = cos_acb
z[q#Dw  
   If cos_acb >= 1 Then n%J{Tcn6  
   nn = 0 Ur/+nL{  
   ElseIf cos_acb <= -1 Then KkJK5dZo  
   nn = 3.14159265258979 ^mA^7jB  
   Else ta\CZp  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) XpH]CF  
   End If muc>4!Q  
   'ff_angle = nn p*_^JU(<p  
   ff_angle = nn * 180 / 3.14159265258979 ~rWys=  
End Function

'判断点在区域内函数 ,'E+f%  
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 {|;5P.,l  
Dim aob, boc, cod, doa, sum As Single j6NK7Li  
  If ppx = p1x And ppy = p1y Then 0"*!0s~  
     point_in = True bCv^za]P6  
     Exit Function Sas&P:#r  
  End If j~IX  
  If ppx = p2x And ppy = p2y Then Z?7XuELKV  
     point_in = True p%8v+9+h2  
     Exit Function =%O@%v  
  End If +~6Nq(kV  
   If ppx = p3x And ppy = p3y Then (H\)BS7#R  
     point_in = True n%M-L[n  
     Exit Function Q>,EYb>wI  
  End If TbY<(wrMZ  
     _wC4n }J  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) Oc|`<^m  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) lBbUA)z6  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) +EtL+Y(U  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) #fy#G}c  
    sum = aob + boc + cod + doa UY
)e6 Zd  
    If 360.01 > sum And sum > 359.99 Then [HV>4,,3"  
       point_in = True Od?M4Ed(  
    Else &rcC7v K9  
       point_in = False Q9UBxpDV:  
    End If Zr&~gXmVS  
End Function

'得到点半径,得到交点坐标函数 *$t<H-U-  
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() %|6t\[gn  
    '求得中心点坐标 v-V#?+#  
Dim tt As String 63J_u-o  
Dim rt(3) As Single 5eZ8$-&([  
    '判断是否平行 E5#Dn.!~  
   acx = p3x - p1x -FAAP&LG  
   acy = p3y - p1y @Gh?|d7bD  
   bdx = p4x - p2x O3?3XB> <  
   bdy = p4y - p2y Zd~l_V f  
   If acx * bdy = acy * bdx Then w $\p\}~,  
      rt(0) = 0 (-RZ|VdYg  
      Exit Function 5pOb;ry")`  
   Else #s'UA!)  
      '判断斜率存在否 BD)5br].  
      If p1x = p3x And p2x <> p4x Then 6vx0F?>_  
         tt = "ac_n_bd_y" 986y\9Zu  
      ElseIf p1x <> p3x And p2x = p4x Then 8y<NT"  
         tt = "ac_y_bd_n" NA%(ZRSg(  
      ElseIf p1x <> p3x And p2x <> p4x Then P,$|.pd'  
         tt = "ac_y_bd_y" _1s\ztDpw  
      End If B=>:w%<Ii  
    Select Case tt D!K){E  
         Case "ac_n_bd_y" q`l&G%  
            'bd线段方程 "kLu]M<  
            k_bd = bdy / bdx )zFPf]gz  
            b_bd = p2y - k_bd * p2x .pP{;:Avpn  
            p_x = p1x o3_dHbdI  
            p_y = k_bd * p_x + b_bd z,6X{=  
         Case "ac_y_bd_n" m+f?+c6  
            'ac线段方程 *PXlbb  
            k_ac = acy / acx xKilTh_.6  
            b_ac = p1y - k_ac * p1x =F(fum;zH  
            p_x = p2x >i`V-"x  
            p_y = k_ac * p_x + b_ac 52*9q!  
        Case "ac_y_bd_y" 4CzT<cp  
           'ac，bd线段都要求 {,Y?+F  
           k_ac = acy / acx 5hVp2w-  
           b_ac = p1y - k_ac * p1x %gF; A*  
           k_bd = bdy / bdx Orb('Z,-3  
           b_bd = p2y - k_bd * p2x c.-/e u^|  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) S,K'y?6  
           p_y = k_ac * p_x + b_ac : ryE`EhB  
        End Select kRCuc}:SB  
      rt(1) = p_x So?ScX\lG  
      rt(2) = p_y fM[Qn*.  
     ~1x,m.f8  
'计算最大半径 XZ@;Tyn0,  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) QAp+LSm  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) HFJna2B`  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) Y9b|lP7!  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 3GH@|id  
Dim bb(5) As Single "pb$[*_@$  
  bb(1) = rr1 Q(P'4XCm  
  bb(2) = rr2 `Qf$]Eoft  
  bb(3) = rr3 uXs.7+f  
  bb(4) = rr4 }y<p_dZI  
  nb = rr1 F %OA  
For i = 1 To 4  2EG`  
    If nb <= bb(i) Then >s@*S
9cj:  
       nb = bb(i) .hYrE5\-  
    End If h$#QRH  
Next i ohK_~  
    rt(0) = Sqr(nb) 2v ^bd^]u:  
    rr = rt() zJp}
JO  
  End If W`baD!*  
         jv:!vi:  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  ;[-OMGr]#  

[]i/\0C^  
有热压工艺方面的人才或者资料分享下； O$Wi=5  
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 ;yfKYN[  

高手真多！

楼主威武霸气.