[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： iYy1!\  
4V`G,W4^J  
FZnw0tMq  

关键点说几个： <a3WKw  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） (tW`=]z-<  
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 ~P-mC@C  
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 ,ig/s2ZG6X  

以下是几个重要的函数： hDGF
7  
1.判断点在区域中函数 w0unS`\4  
2.计算夹角函数 9Mcae31  
3.转置函数 lyhiFkO iH  
4.得到区域中心点，及区域半径函数 Wd ELV3  
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 1*p*dM#  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 /Z4et'Lo  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 3G4-^hY<  
   cax = x2 - x1 TD_Oo-+\  
   cay = y2 - y1 V(*
(F7+  
   cbx = x2 - x3 93hxSRw  
   cby = y2 - y3 bg0

Wnl  
   mo_jj = cax * cbx + cay * cby \73ch  
   mo_ca = Sqr(cax * cax + cay * cay) Ek}A
]zC  
   mo_cb = Sqr(cbx * cbx + cby * cby) e96k{C`j0  
   cos_acb = mo_jj / (mo_ca * mo_cb) |EN
h)M8}r  
   'ff_cos = cos_acb +"VP-s0  
   If cos_acb >= 1 Then ov
V'VcUs  
   nn = 0 +ck}l2&#  
   ElseIf cos_acb <= -1 Then Gs[XJ 5%`~  
   nn = 3.14159265258979 $ME)#(  
   Else Z?z.?ar  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) vvOV2n.WD  
   End If a[TMDU;(/4  
   'ff_angle = nn Z/J y'$x  
   ff_angle = nn * 180 / 3.14159265258979 &+R?_Ooibk  
End Function

'判断点在区域内函数 4E?Oky#}-  
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 " 2Dngw  
Dim aob, boc, cod, doa, sum As Single 0
SPk|kr  
  If ppx = p1x And ppy = p1y Then N}YkMJy  
     point_in = True Xn\jO>[Ef  
     Exit Function
G*v,GR  
  End If Ti&z1_u  
  If ppx = p2x And ppy = p2y Then `@|$,2[C  
     point_in = True 2GStN74Xr  
     Exit Function 7"xd1l?zz  
  End If >yh2Lri  
   If ppx = p3x And ppy = p3y Then b<u3 hln%,  
     point_in = True WOf 4o  
     Exit Function 7v_8_K  
  End If N)>ID(}F1  
     ItTz.sQ  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ;6hOx(>`=  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) ,,|^%Ct']  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) H 7 ^/q7  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) uRe'%?W  
    sum = aob + boc + cod + doa YT8F#t8  
    If 360.01 > sum And sum > 359.99 Then aFIw=c(nP  
       point_in = True P L+sR3bR  
    Else H7+,*  
       point_in = False FU<Jp3<%  
    End If HE_8(Ms;8  
End Function

'得到点半径,得到交点坐标函数 vgN&K@hJ  
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() @!d{bQd,  
    '求得中心点坐标 fa2kG&, _  
Dim tt As String $]2vv
r  
Dim rt(3) As Single O!bOp=  
    '判断是否平行 %GIr&V4|  
   acx = p3x - p1x 01(AK%e  
   acy = p3y - p1y xFg>SJ7]  
   bdx = p4x - p2x <yg
F(  
   bdy = p4y - p2y ZWp(GC1NA  
   If acx * bdy = acy * bdx Then 1 I",L&S1  
      rt(0) = 0 %C_HXr@  
      Exit Function YkQd  
   Else wJY'  
      '判断斜率存在否 j^2j&Ta  
      If p1x = p3x And p2x <> p4x Then =rX>1  
         tt = "ac_n_bd_y" yyy|Pw4:Z  
      ElseIf p1x <> p3x And p2x = p4x Then !m?-!:  
         tt = "ac_y_bd_n" i8HTzv"J  
      ElseIf p1x <> p3x And p2x <> p4x Then ('p5:d  
         tt = "ac_y_bd_y" hqkz^!rp  
      End If 4tmAzD  
    Select Case tt ^@NU}S):yN  
         Case "ac_n_bd_y" 5rZ  
            'bd线段方程 r^ ZEImjc  
            k_bd = bdy / bdx 07=mj%yV  
            b_bd = p2y - k_bd * p2x /fV;^=:8c  
            p_x = p1x c<$OA=n  
            p_y = k_bd * p_x + b_bd I?G:p+  
         Case "ac_y_bd_n" OJy#w{4  
            'ac线段方程 Uq`'}Vo  
            k_ac = acy / acx fZA4q0  
            b_ac = p1y - k_ac * p1x ~z;FP$U  
            p_x = p2x As<bL:>dE  
            p_y = k_ac * p_x + b_ac &W6^sj*k5U  
        Case "ac_y_bd_y" <0q;NrvUb  
           'ac，bd线段都要求 Hc(OI|z~  
           k_ac = acy / acx q;)JISf.  
           b_ac = p1y - k_ac * p1x %z4Nl$\  
           k_bd = bdy / bdx x0:m-C  
           b_bd = p2y - k_bd * p2x yY&I dE  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) p0<\G  
           p_y = k_ac * p_x + b_ac N^:9Fz  
        End Select 1c{DY  
      rt(1) = p_x xe&i^+i  
      rt(2) = p_y @/-\k*T  
     l8#EM1g-  
'计算最大半径 3n}?bY8@5_  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) 7o5BXF  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) NGOfb  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) (;^syJrh  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) @@%.t|=  
Dim bb(5) As Single {o`]I>gb  
  bb(1) = rr1 -Wi` G  
  bb(2) = rr2 x>`%DwoRI  
  bb(3) = rr3 C#Iybg  
  bb(4) = rr4 c.F6~IHu7  
  nb = rr1 Pce;r*9  
For i = 1 To 4 X1vd'
>  
    If nb <= bb(i) Then r#]WI|  
       nb = bb(i) 63
,H{  
    End If Dy8r 9  
Next i P;]F(in=  
    rt(0) = Sqr(nb) tS8u  
    rr = rt() B%+T2=&$7  
  End If ax5<#3__  
         MfQ?W`Kop  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  g<f <Ip=  

b Y\K  
有热压工艺方面的人才或者资料分享下； ^!ZC?h!rG  
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 SVs_dG$  

高手真多！

楼主威武霸气.