[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：  3}}~(  
K~OfC  

描述:请输入描述

图片:2.jpg

ET1/oG<@  

关键点说几个： 7!.%HhU0  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） h"cLZM:6  
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 "*|plB  
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 S/v+7oT  

以下是几个重要的函数： 1C(6.7l  
1.判断点在区域中函数 zd AqGQfc  
2.计算夹角函数
#=UEx  
3.转置函数 |2(z<b&y=  
4.得到区域中心点，及区域半径函数 "I?sz)pxG  
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） WH2?_U-8h  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 {ve86 POY  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single PI
~LbDE  
   cax = x2 - x1 7q?u`3l  
   cay = y2 - y1 GCCmUR9d  
   cbx = x2 - x3 J&%vBg^  
   cby = y2 - y3 C-4NiXa  
   mo_jj = cax * cbx + cay * cby (lF;c<69  
   mo_ca = Sqr(cax * cax + cay * cay) itb0dF1G  
   mo_cb = Sqr(cbx * cbx + cby * cby) Z)Y--`*  
   cos_acb = mo_jj / (mo_ca * mo_cb) ]^MOFzSz~  
   'ff_cos = cos_acb {?m;D
Yv  
   If cos_acb >= 1 Then Dv?'(.z  
   nn = 0 Z#YkAQHv5  
   ElseIf cos_acb <= -1 Then ?F'gh4  
   nn = 3.14159265258979 #=/eu=  
   Else (v(!l=3  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 2f(5C*~  
   End If /'?Fz*b  
   'ff_angle = nn IQ[?ej3W  
   ff_angle = nn * 180 / 3.14159265258979 Q>f^*FyOw<  
End Function

'判断点在区域内函数 A3ad9?LR[R  
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 B;tU+36nM  
Dim aob, boc, cod, doa, sum As Single r*]0PQ{?  
  If ppx = p1x And ppy = p1y Then :gv`)  
     point_in = True ']^e,9=Q  
     Exit Function Ry*NRP;  
  End If x][vd^iW  
  If ppx = p2x And ppy = p2y Then n's3!HQY[  
     point_in = True Xm`s=5%  
     Exit Function %98F>wl  
  End If ,GEMc a,`  
   If ppx = p3x And ppy = p3y Then <K!5N&vh  
     point_in = True JoQzf~  
     Exit Function BX$t |t;!m  
  End If F^bC!;~x  
     K;;Q*NN-  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) m&o}qzC'y  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 0z{S@  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) *9e T#dH  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) UN_f2  
    sum = aob + boc + cod + doa =BJ/ZM  
    If 360.01 > sum And sum > 359.99 Then Ls#
pe  
       point_in = True Y'"2s~_ Z  
    Else zMb7a_W  
       point_in = False 0(#HMBE
8  
    End If J411bIxD+q  
End Function

'得到点半径,得到交点坐标函数 wqBGJ   
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() b6_*ljM  
    '求得中心点坐标 @eMDRbgq;[  
Dim tt As String ]3hz{zqV^  
Dim rt(3) As Single [YP8z~  
    '判断是否平行 ,R0@`t1 p  
   acx = p3x - p1x W]5kM~Q@  
   acy = p3y - p1y 8 W8ahG}  
   bdx = p4x - p2x gVCkj!{  
   bdy = p4y - p2y _
dppUUm  
   If acx * bdy = acy * bdx Then Pgf$GXE  
      rt(0) = 0 u,[Yaw"L  
      Exit Function M]!\X6<_  
   Else ;&e5.K+.Z  
      '判断斜率存在否 w(`X P  
      If p1x = p3x And p2x <> p4x Then @;_r`AT7  
         tt = "ac_n_bd_y" lJoMJS;S]}  
      ElseIf p1x <> p3x And p2x = p4x Then F0:Fv;  
         tt = "ac_y_bd_n"
5b9_6L6  
      ElseIf p1x <> p3x And p2x <> p4x Then &q1(v3cOO  
         tt = "ac_y_bd_y" 1iaNb[:QX  
      End If X obiF  
    Select Case tt oTo'? E#  
         Case "ac_n_bd_y" (rFY8oHD  
            'bd线段方程 AQ. Y-'\t  
            k_bd = bdy / bdx tr7FV1p  
            b_bd = p2y - k_bd * p2x lW'6rat  
            p_x = p1x ZA>hN3fE'  
            p_y = k_bd * p_x + b_bd N-jFA8n  
         Case "ac_y_bd_n" !Qrlb>1z-  
            'ac线段方程 )vOZp&  
            k_ac = acy / acx )z3mS2  
            b_ac = p1y - k_ac * p1x ;3Fgy8T  
            p_x = p2x O<S*bN>BF  
            p_y = k_ac * p_x + b_ac 2f`
u?
T  
        Case "ac_y_bd_y" KQ?E]}rZ  
           'ac，bd线段都要求 T*\'G6e  
           k_ac = acy / acx ]eb9Fq:N7  
           b_ac = p1y - k_ac * p1x /YHBhoat  
           k_bd = bdy / bdx UBpYR> <\  
           b_bd = p2y - k_bd * p2x QpS0iUG  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) zF<*h~  
           p_y = k_ac * p_x + b_ac Zi$a6  
        End Select e{OmW  
      rt(1) = p_x cg7NtY  
      rt(2) = p_y W5$jIQ}Bw  
     \%&QIe;:k  
'计算最大半径 $ePAsJ  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) M
p?Ev.  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) L|S#(0  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) "vH@b_>9|  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) go6Hb>  
Dim bb(5) As Single ho#]?Z#  
  bb(1) = rr1 R[wy{4<y  
  bb(2) = rr2 .,l?z  
  bb(3) = rr3 Mb3,!  
  bb(4) = rr4 s ZkQJ->  
  nb = rr1 )Be}Ev#)Zx  
For i = 1 To 4 HCb7`(
@  
    If nb <= bb(i) Then =/.[&DG  
       nb = bb(i) T'\lntN  
    End If #$K\:V+ 4  
Next i 6aCAz2/  
    rt(0) = Sqr(nb) ; z:}OD  
    rr = rt() -:pLlN-f  
  End If q{@>2Al
K  
         -DX|[70  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  w~;1R\?|  

A>xFNem  
有热压工艺方面的人才或者资料分享下； {E@Vh  
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 iU~oPp[e  

高手真多！

楼主威武霸气.