[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： W5SCm(QS5  
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关键点说几个： X+%5q =N  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） +oRBSAg-  
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 <tn6=IV  
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 C[JGt9{Y  

以下是几个重要的函数： $v\o14v  
1.判断点在区域中函数 L3J .Oh  
2.计算夹角函数 tPz!C&.=  
3.转置函数 wgcKeT
D9  
4.得到区域中心点，及区域半径函数 q_b,3Tp  
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） A>B_~=  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 Y q(CD!  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single S7kZpD$  
   cax = x2 - x1 ;-"'sEu}  
   cay = y2 - y1 H6V!W\:s  
   cbx = x2 - x3 eZvG  
   cby = y2 - y3 Jf
3xK"in  
   mo_jj = cax * cbx + cay * cby i"GCm`  
   mo_ca = Sqr(cax * cax + cay * cay) #Nv)SCc  
   mo_cb = Sqr(cbx * cbx + cby * cby) BW{&A&j  
   cos_acb = mo_jj / (mo_ca * mo_cb) Scz/2vNi`  
   'ff_cos = cos_acb ?Vo/mtbY5X  
   If cos_acb >= 1 Then k3VRa|Y")  
   nn = 0 z$b'y;k  
   ElseIf cos_acb <= -1 Then +et)!2N  
   nn = 3.14159265258979 Xd@_:ds  
   Else 9^2l<4^Z  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) e;r?g67  
   End If )D8V;g(7F  
   'ff_angle = nn $(N+E,XB  
   ff_angle = nn * 180 / 3.14159265258979 `S:LuU8e  
End Function

'判断点在区域内函数 /PTk296@  
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 mY0FewwTy  
Dim aob, boc, cod, doa, sum As Single NKRI|'Y,  
  If ppx = p1x And ppy = p1y Then E0_S+`o2y  
     point_in = True yl UkVr   
     Exit Function &A)u!l Ue  
  End If Nny#}k Bt  
  If ppx = p2x And ppy = p2y Then =b/:rSd$NA  
     point_in = True h$2lO^  
     Exit Function c7f11N!v>b  
  End If QvvH/u  
   If ppx = p3x And ppy = p3y Then BaXf=RsZ  
     point_in = True g$9EI\a  
     Exit Function c]>LL(R-7)  
  End If I*OJPFZ^4  
     <NlL,  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) bd[%=5  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) iVAAGZ>am  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) 344E4F"ph  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) fiZq C?(  
    sum = aob + boc + cod + doa 'l&bg8K9  
    If 360.01 > sum And sum > 359.99 Then #J|DW C!#d  
       point_in = True [z> Ya-uz7  
    Else q-R'5p\C?|  
       point_in = False "fZWAGDBO\  
    End If ~%Xs"R1c,  
End Function

'得到点半径,得到交点坐标函数 .V.ga2+  
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() Q@5v> `  
    '求得中心点坐标 a1 .+L  
Dim tt As String C{2y*sx  
Dim rt(3) As Single c!Wj^  
    '判断是否平行 !bQqzny$R  
   acx = p3x - p1x ix!4s613w  
   acy = p3y - p1y cd:VFjT  
   bdx = p4x - p2x Vk?US&1q}  
   bdy = p4y - p2y eiwPp9[0
8  
   If acx * bdy = acy * bdx Then H`EsFKw\%  
      rt(0) = 0 Eq6. s)10  
      Exit Function X\HP&;Wd  
   Else gSt'<v  
      '判断斜率存在否 VK3e(7b  
      If p1x = p3x And p2x <> p4x Then ew 4pAav  
         tt = "ac_n_bd_y" N={0A  
      ElseIf p1x <> p3x And p2x = p4x Then _ m<@ou7  
         tt = "ac_y_bd_n" <nbc RO.  
      ElseIf p1x <> p3x And p2x <> p4x Then G[ gfD\  
         tt = "ac_y_bd_y" [$FiXH J  
      End If /Q\|u:oO,  
    Select Case tt aa,^+^J  
         Case "ac_n_bd_y" Mv7=ZAm  
            'bd线段方程 Q/^a(  
            k_bd = bdy / bdx dA=T+u  
            b_bd = p2y - k_bd * p2x ?i5=sK\  
            p_x = p1x \oy8)o/Gb  
            p_y = k_bd * p_x + b_bd %hV]vm
  
         Case "ac_y_bd_n" Dio9'&DtC  
            'ac线段方程 3&"+)*/ m  
            k_ac = acy / acx thrv_^A  
            b_ac = p1y - k_ac * p1x PpWdZ  
            p_x = p2x *!&,)
''  
            p_y = k_ac * p_x + b_ac 8Q\ T,C  
        Case "ac_y_bd_y" vCsJnKqK  
           'ac，bd线段都要求 }CB9H$FkCY  
           k_ac = acy / acx ql(~3/kA_  
           b_ac = p1y - k_ac * p1x bm#/ KT_8  
           k_bd = bdy / bdx B'!I{LC  
           b_bd = p2y - k_bd * p2x ]D&\|,,(
 
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) .BrYz:
#A  
           p_y = k_ac * p_x + b_ac ;QqC c!b  
        End Select p n(y4we  
      rt(1) = p_x I|R;)[;X  
      rt(2) = p_y -i*]Sgese  
     8 GW0w
 
'计算最大半径 pfF2!`7pI  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) $[{YE[a  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) V6uh'2  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) f/UIpswrZ'  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) I/Q~rVt  
Dim bb(5) As Single ^+rI=c 0  
  bb(1) = rr1 -mqL[ h,  
  bb(2) = rr2 I,@ 6w  
  bb(3) = rr3 ]y~"M  
  bb(4) = rr4 EN;4EC7tE  
  nb = rr1 *r].EBJ\  
For i = 1 To 4 U_<k*o@
:  
    If nb <= bb(i) Then cs0rz= ZdH  
       nb = bb(i) ak$D1#hY  
    End If ` 3h,Cy^  
Next i `tH:oP0=  
    rt(0) = Sqr(nb) ,^@z;xF  
    rr = rt() p}(pIoyUF  
  End If Bz4;R9_%I  
         W
WN2  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  mOntc6&]  

RKb (  
有热压工艺方面的人才或者资料分享下； nTCwLnX(O  
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 kerBy
\^  

高手真多！

楼主威武霸气.