[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： G1T^a>tj4  
7J$b$P0}  
}71LLzG`/  

关键点说几个： m"tOe?  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） gA#RM5x@  
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 {WN(&eax  
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 H!e 3~+)  

以下是几个重要的函数： Upl6:xYrG  
1.判断点在区域中函数 %9C@ Xl  
2.计算夹角函数 ;d.K_P  
3.转置函数 !#ri5{od  
4.得到区域中心点，及区域半径函数 q*jNH\|  
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） #4LFG\s  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 _GQz!YA  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single ~`;rNnOT3  
   cax = x2 - x1 xZ5M/YSyG  
   cay = y2 - y1 PQW(EeQ  
   cbx = x2 - x3 FUK3)lT  
   cby = y2 - y3 FxG7Pk+=  
   mo_jj = cax * cbx + cay * cby >Y 1{rSk  
   mo_ca = Sqr(cax * cax + cay * cay) bSwW
szd~  
   mo_cb = Sqr(cbx * cbx + cby * cby) n@C~ev@%S  
   cos_acb = mo_jj / (mo_ca * mo_cb) c47")2/yO  
   'ff_cos = cos_acb q}uHFp/J  
   If cos_acb >= 1 Then UnDgu4#R`A  
   nn = 0 (oK^c-x  
   ElseIf cos_acb <= -1 Then 5M]z5}n/  
   nn = 3.14159265258979 \b'xt  
   Else U7mozHS,:9  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) `7aDEzmJ  
   End If I7QCYB|  
   'ff_angle = nn ^ OJyN,A  
   ff_angle = nn * 180 / 3.14159265258979 XALI<ZY  
End Function

'判断点在区域内函数 sH,kW|D  
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 _fFU#k:MU  
Dim aob, boc, cod, doa, sum As Single z><5R|Gf  
  If ppx = p1x And ppy = p1y Then b/$km?R  
     point_in = True a~h:qpgc  
     Exit Function P27%xV-n>  
  End If rn@`yTw^  
  If ppx = p2x And ppy = p2y Then r,SnXjp@  
     point_in = True :_<_[Y]1  
     Exit Function &M

mU  
  End If =+5,B\~q@C  
   If ppx = p3x And ppy = p3y Then mN`YuR~  
     point_in = True |as!Ui/J/  
     Exit Function p]D]: Z}P  
  End If e
/_C  
     >!e<}84b  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) .%EL\2  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) CDj~;$[B  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) ubMOD<  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) rjt
8fN  
    sum = aob + boc + cod + doa {n3EGSP#  
    If 360.01 > sum And sum > 359.99 Then _Jz8{` "  
       point_in = True 5cr(S~Q;  
    Else oq/G`{`\  
       point_in = False !9*c8bL D  
    End If `Ycf]2.,$
 
End Function

'得到点半径,得到交点坐标函数 ~\p]~qQ\K  
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() "eWk#/  
    '求得中心点坐标 {U]H;~3 ?  
Dim tt As String }UJv[  
Dim rt(3) As Single qL6c`(0  
    '判断是否平行 k-V,~c  
   acx = p3x - p1x +=Jir1SLV  
   acy = p3y - p1y ;a=w5,h:  
   bdx = p4x - p2x 5
hj  
   bdy = p4y - p2y d4:
`@*
 
   If acx * bdy = acy * bdx Then 75nNh~?)\  
      rt(0) = 0 <tpmUA[]  
      Exit Function e:E0"<  
   Else ,
H}_%}10  
      '判断斜率存在否 [L`ZE*z  
      If p1x = p3x And p2x <> p4x Then _$NIp `d  
         tt = "ac_n_bd_y" C`=p+2I]  
      ElseIf p1x <> p3x And p2x = p4x Then j hYToMq  
         tt = "ac_y_bd_n" (2ur5uk+  
      ElseIf p1x <> p3x And p2x <> p4x Then $CTSnlPq  
         tt = "ac_y_bd_y" 8,D 2^Gg  
      End If T J^u"j-'  
    Select Case tt uY_SU-v  
         Case "ac_n_bd_y" R2etB*k6[  
            'bd线段方程 B!{d-gb  
            k_bd = bdy / bdx m42T9wSsx  
            b_bd = p2y - k_bd * p2x ` 8W*  
            p_x = p1x 'ckQg=zPR  
            p_y = k_bd * p_x + b_bd eAUcv`[#p  
         Case "ac_y_bd_n" 5Dp#u  
            'ac线段方程 !Bz0^1,L  
            k_ac = acy / acx rWys'uc  
            b_ac = p1y - k_ac * p1x OJT1d-5p  
            p_x = p2x  [=O/1T  
            p_y = k_ac * p_x + b_ac rqv))Zo`  
        Case "ac_y_bd_y" 6-`|:[Q~  
           'ac，bd线段都要求 ~DO4,  
           k_ac = acy / acx -yxOBq  
           b_ac = p1y - k_ac * p1x 4v p  
           k_bd = bdy / bdx jA".r'D%  
           b_bd = p2y - k_bd * p2x pY4}>ju(g  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ,h|qi[7  
           p_y = k_ac * p_x + b_ac 64Lx-avf  
        End Select Yw _+`,W   
      rt(1) = p_x 3X9b2RY*L/  
      rt(2) = p_y x@
m
L $  
     jF`BjxrG  
'计算最大半径 MT(o"ltQ  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) NmK8<9`u  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) A5,t+8`aci  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 8x`.26p  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) Iff9'TE  
Dim bb(5) As Single yx V:!gl  
  bb(1) = rr1 q'pK,uNW  
  bb(2) = rr2 R1&unm0  
  bb(3) = rr3 Y_`-9'&  
  bb(4) = rr4 Y`+=p@2O2o  
  nb = rr1 e\O/H<  
For i = 1 To 4 [m^+,%m5]  
    If nb <= bb(i) Then j4=(H:c~E  
       nb = bb(i) Gm*X'[\DD  
    End If Y
*_)h\f  
Next i J0zn-  
    rt(0) = Sqr(nb) u3Gjg{-N7  
    rr = rt() O1')nYF7  
  End If ^Rm  
         v}WR+)uFQ  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  $MJm*6h  

DK}"b}Fvq  
有热压工艺方面的人才或者资料分享下； $ MC)}l  
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 j
lxpt)0i  

高手真多！

楼主威武霸气.