[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：
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关键点说几个： z"D'rHxy  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ~!//|q^J]  
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 -0P(lkylf  
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 {zhajY7  

以下是几个重要的函数： (?y
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1.判断点在区域中函数 'jnR<>N  
2.计算夹角函数 +0DPhc  
3.转置函数 $-4 Zi  
4.得到区域中心点，及区域半径函数 <36z,[,kZ@  
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|Yry  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 J}?:\y<  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single G_1`NyI  
   cax = x2 - x1 myq:~^L ;  
   cay = y2 - y1 ,RXfJh  
   cbx = x2 - x3
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   cby = y2 - y3 D #Ku5~j  
   mo_jj = cax * cbx + cay * cby 7%` \E9t  
   mo_ca = Sqr(cax * cax + cay * cay) x )w6  
   mo_cb = Sqr(cbx * cbx + cby * cby) P;' xa^Y  
   cos_acb = mo_jj / (mo_ca * mo_cb) V!&O5T(~  
   'ff_cos = cos_acb Or:a\qQ1  
   If cos_acb >= 1 Then ps@;Z?Q  
   nn = 0 %G43g#pD  
   ElseIf cos_acb <= -1 Then :i};]pR  
   nn = 3.14159265258979 X}5}M+'~  
   Else \g;o9}@3~  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) P(|+1$#[  
   End If
rf\A[)<:  
   'ff_angle = nn r5wy]z^  
   ff_angle = nn * 180 / 3.14159265258979 0x1#^dII  
End Function

'判断点在区域内函数 4Rv.m*^B  
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 2leTEs5aK`  
Dim aob, boc, cod, doa, sum As Single *p  !F+"  
  If ppx = p1x And ppy = p1y Then vCe]iB  
     point_in = True 7FBaN7l  
     Exit Function E9]\ I>v  
  End If 1;FtQnvH  
  If ppx = p2x And ppy = p2y Then }j\_XaB  
     point_in = True }#D+}Mo!,  
     Exit Function S#[w)
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  End If E(p*B8d  
   If ppx = p3x And ppy = p3y Then _Yqog/sG  
     point_in = True ^$VH~i&  
     Exit Function =bgu2#%Z  
  End If ]Te,m}E  
     %xuJQuCqf  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) .KeZZLH  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ]ML(=7z"  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) zMI_8lNz  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 2M`:/shq  
    sum = aob + boc + cod + doa p~bx  
    If 360.01 > sum And sum > 359.99 Then I|eYeJ3  
       point_in = True XhEJF !  
    Else 8}_M1w6v  
       point_in = False z-g"`w:Lj  
    End If F
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End Function

'得到点半径,得到交点坐标函数 yc:y}"  
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() EZ+L'  
    '求得中心点坐标 tmVGJ+gz  
Dim tt As String _i@4R<  
Dim rt(3) As Single gF53[\w^v  
    '判断是否平行 6t!PHA  
   acx = p3x - p1x `SM37({c  
   acy = p3y - p1y QTLGM-Z  
   bdx = p4x - p2x qC:QY6g$N  
   bdy = p4y - p2y SpJIEw  
   If acx * bdy = acy * bdx Then =,w(D~ps  
      rt(0) = 0 QFX/
x  
      Exit Function AR?1_]"=  
   Else @{LD_>R  
      '判断斜率存在否
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      If p1x = p3x And p2x <> p4x Then FhJtiw@  
         tt = "ac_n_bd_y" <4%cKW0  
      ElseIf p1x <> p3x And p2x = p4x Then mK_2VZj&  
         tt = "ac_y_bd_n" t;/s^-}  
      ElseIf p1x <> p3x And p2x <> p4x Then tcD DX'S  
         tt = "ac_y_bd_y" 8H@]v@Z2  
      End If }_|qDMk+  
    Select Case tt W<tw],M-#  
         Case "ac_n_bd_y" 3Q:HzqG  
            'bd线段方程 45aFH}w:  
            k_bd = bdy / bdx , aJC7'(  
            b_bd = p2y - k_bd * p2x zbgH}6b  
            p_x = p1x efXiZ  
            p_y = k_bd * p_x + b_bd `&w{-om\  
         Case "ac_y_bd_n" `x:8m?q05  
            'ac线段方程 Rn9e#_Az  
            k_ac = acy / acx \6L,jSoBl  
            b_ac = p1y - k_ac * p1x :N#8|;J1Fl  
            p_x = p2x E E^lw61  
            p_y = k_ac * p_x + b_ac k\<8h%
 
        Case "ac_y_bd_y" OYLg-S  
           'ac，bd线段都要求 A(}D76o_  
           k_ac = acy / acx M"!{Dx~  
           b_ac = p1y - k_ac * p1x w:HRzU>  
           k_bd = bdy / bdx AQm#a;  
           b_bd = p2y - k_bd * p2x F1GFn|OA  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) vlVHoF;&  
           p_y = k_ac * p_x + b_ac 6.6;oa4j  
        End Select w0&|8y  
      rt(1) = p_x K*9~g('  
      rt(2) = p_y (U([T-H  
     # ~(lY}  
'计算最大半径 8{DW$ZtR  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) b-
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   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) }F4%5go  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) K)N'~jCG  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) vf0 fa46  
Dim bb(5) As Single 1<D^+FC4b,  
  bb(1) = rr1 AOv>O52F/Q  
  bb(2) = rr2 y"Ios:v@-  
  bb(3) = rr3 2OZ<t@\OY  
  bb(4) = rr4 'BX U'  
  nb = rr1 +N2R'Phv  
For i = 1 To 4 GV8`.3DBOF  
    If nb <= bb(i) Then &|I{ju_  
       nb = bb(i) ]=G dAW  
    End If 4WXr~?Vq9  
Next i o7kQ&w  
    rt(0) = Sqr(nb) OfPv'rW{x  
    rr = rt() yF@72tK  
  End If @B9O*x+n:  
         b NR@d'U  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  85ND 3F6q4  

Ae'N1V  
有热压工艺方面的人才或者资料分享下； Y*YV/E.  
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 pXf5/u8&  

高手真多！

楼主威武霸气.