[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： HA>OkA/  
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描述:请输入描述

图片:2.jpg

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关键点说几个： >V}#[/n  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） dNeVo|Y~h  
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 N[ Og43Y  
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 ~FG]wNgS  

以下是几个重要的函数： Qjv}$`M  
1.判断点在区域中函数 M:B=\&.O  
2.计算夹角函数 5taT5?n2  
3.转置函数 _^%,x  
4.得到区域中心点，及区域半径函数 _.Uh)-yR  
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） ZRU{[4  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 57  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single jkF
^-Up.  
   cax = x2 - x1 SbrecZ  
   cay = y2 - y1 Ls+2Zbh  
   cbx = x2 - x3 "n5N[1bk  
   cby = y2 - y3 dn$!&
  
   mo_jj = cax * cbx + cay * cby q ,]L$  
   mo_ca = Sqr(cax * cax + cay * cay) <FkFs{(t  
   mo_cb = Sqr(cbx * cbx + cby * cby) mLLDE;7|}  
   cos_acb = mo_jj / (mo_ca * mo_cb) 8\A#CQ5b  
   'ff_cos = cos_acb `Cynj+PCe  
   If cos_acb >= 1 Then B!L{  
   nn = 0 !Pfr,a  
   ElseIf cos_acb <= -1 Then q Y?j#fzi  
   nn = 3.14159265258979 Pw`8Wj  
   Else w;:*P  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) IDriGZZ<)6  
   End If u[=r,^YQ  
   'ff_angle = nn YWO)HsjP  
   ff_angle = nn * 180 / 3.14159265258979 9W1YW9rL  
End Function

'判断点在区域内函数 !6O(-S
2A  
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 17"uf.G  
Dim aob, boc, cod, doa, sum As Single Y>dzR)~3[  
  If ppx = p1x And ppy = p1y Then nuMD!qu!nZ  
     point_in = True Vl=l?A8  
     Exit Function m6\E$;`  
  End If B:S>wFE(.  
  If ppx = p2x And ppy = p2y Then SaAFz&WRl  
     point_in = True 4=.89T#<  
     Exit Function ub#a`  
  End If Ru!iR#s)!  
   If ppx = p3x And ppy = p3y Then G+"t/?/  
     point_in = True DIfaVo/"  
     Exit Function J~zUp(>K  
  End If dI@(<R  
     :W.(S6O(  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) {{D)YldtA  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) r|fL&dtr  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) S\YTX%Xm}  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) U}e!Wjrc  
    sum = aob + boc + cod + doa mCsMqDH  
    If 360.01 > sum And sum > 359.99 Then (pCrmyB  
       point_in = True RYQR(v  
    Else M2>Vj/  
       point_in = False =9boya,>  
    End If TA`1U;c{n  
End Function

'得到点半径,得到交点坐标函数 L
_uVL#To  
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() ~Ei$nV  
    '求得中心点坐标 g1/[eoZzk  
Dim tt As String vv3* j&I  
Dim rt(3) As Single h-#6av:  
    '判断是否平行 Pw7]r<Q  
   acx = p3x - p1x 4$iz4U:P  
   acy = p3y - p1y LqoB 10Kc\  
   bdx = p4x - p2x 6Z6'}BDP  
   bdy = p4y - p2y B:;pvW]  
   If acx * bdy = acy * bdx Then ?wiCQ6*$  
      rt(0) = 0 0[NZ>7wqMZ  
      Exit Function _"Dv uR  
   Else MSQEO4ge  
      '判断斜率存在否 \:# L)  
      If p1x = p3x And p2x <> p4x Then *
J7DY f  
         tt = "ac_n_bd_y" @;zl  
      ElseIf p1x <> p3x And p2x = p4x Then =)H.cuc  
         tt = "ac_y_bd_n" hLd^ agX  
      ElseIf p1x <> p3x And p2x <> p4x Then 7 S#J>*  
         tt = "ac_y_bd_y" *v jmy/3  
      End If )BZ.Sv  
    Select Case tt 53;}Nt#R  
         Case "ac_n_bd_y" |"X*@s\'  
            'bd线段方程 U3ADsdn  
            k_bd = bdy / bdx f}#~-.NGs  
            b_bd = p2y - k_bd * p2x |C;=-|  
            p_x = p1x W+aP}rZm:  
            p_y = k_bd * p_x + b_bd G\/zkrxmv  
         Case "ac_y_bd_n" ITE{@1  
            'ac线段方程 \%JgH=@ :=  
            k_ac = acy / acx =V,mtT  
            b_ac = p1y - k_ac * p1x EnKR%Ctw  
            p_x = p2x _UMg[Um  
            p_y = k_ac * p_x + b_ac }WC[$Y_@  
        Case "ac_y_bd_y" }>pknc?  
           'ac，bd线段都要求 '%s.^kn  
           k_ac = acy / acx sQUM~HD\a  
           b_ac = p1y - k_ac * p1x 4x=v?g&  
           k_bd = bdy / bdx L:KF_W.I+  
           b_bd = p2y - k_bd * p2x E<{R.r  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) APn
|\  
           p_y = k_ac * p_x + b_ac >Eyt17_H"n  
        End Select Go`vfm"S  
      rt(1) = p_x )al]*[lY  
      rt(2) = p_y f O}pj:  
     =57>!)  
'计算最大半径 2@n{yYwy  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) Dzpq_F!;V  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) XO>KZV7)  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) dc+>m,3$  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ;V:i!u u  
Dim bb(5) As Single (R[[Z,>w.  
  bb(1) = rr1 c?(4t67|  
  bb(2) = rr2 g+8OekzB5  
  bb(3) = rr3 : Xda1S  
  bb(4) = rr4 jnkR}wAA  
  nb = rr1
I13y6= d  
For i = 1 To 4 J|W<;  
    If nb <= bb(i) Then 2prU  
       nb = bb(i)
@+&LYy72  
    End If P>y@kPi  
Next i m<<+  
    rt(0) = Sqr(nb) Q
GMV}y  
    rr = rt() pQyK={7?`  
  End If bbDZ#DK"  
         fF!Yp iI"  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  yER(6V'\iQ  

]43/`FX  
有热压工艺方面的人才或者资料分享下； {.`vs;U  
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 )w em|:H  

高手真多！

楼主威武霸气.