[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： OZh+x`' #  
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关键点说几个： FdJC@Y-#uA  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） O~&l.>??  
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 ';7|H|,F
 
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 ,K[B/tD{j  

以下是几个重要的函数： wh:`4Yw  
1.判断点在区域中函数 QX~*aqS3s8  
2.计算夹角函数 L7%'Y}1e.  
3.转置函数 ;h3*MR  
4.得到区域中心点，及区域半径函数 ikRIL2Y  
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）
A1f]HT  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 ;+b}@e  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single 0XYO2k  
   cax = x2 - x1 L kq>>?T=  
   cay = y2 - y1 X0Oq lAw  
   cbx = x2 - x3 j*:pW;)^  
   cby = y2 - y3 |f?C*t',  
   mo_jj = cax * cbx + cay * cby 'HcDl@E  
   mo_ca = Sqr(cax * cax + cay * cay) MthThsr7  
   mo_cb = Sqr(cbx * cbx + cby * cby) fp![Pbms.  
   cos_acb = mo_jj / (mo_ca * mo_cb) f|^f^Hu:{  
   'ff_cos = cos_acb A^p $~e\)  
   If cos_acb >= 1 Then B?%D  
   nn = 0 D
[#\Y+N  
   ElseIf cos_acb <= -1 Then ^:)&KV8D|  
   nn = 3.14159265258979 Xp?Z;$r$  
   Else c\b>4 &n  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) 3MzY]J y(  
   End If $^0YK|F  
   'ff_angle = nn +tN-X'u##  
   ff_angle = nn * 180 / 3.14159265258979 Rt:PW}rFf  
End Function

'判断点在区域内函数 68!fcK  
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 &4[iC/}  
Dim aob, boc, cod, doa, sum As Single A{o{o++  
  If ppx = p1x And ppy = p1y Then M#>GU<4"  
     point_in = True "}EbA3  
     Exit Function '~cEdGD9H  
  End If HY:@=%R  
  If ppx = p2x And ppy = p2y Then g0U ?s  
     point_in = True TatyD**(  
     Exit Function I(CI')Q  
  End If #?=cg]v_  
   If ppx = p3x And ppy = p3y Then D{l((t3=T  
     point_in = True z,7^dlT  
     Exit Function %dU}GYL_  
  End If p{J_d,JH  
     ZD{srEa/a  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) mC7Y *  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) HW G~m:km  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) I{PN6bn{>  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) >8tuLd*T  
    sum = aob + boc + cod + doa u@EM,o  
    If 360.01 > sum And sum > 359.99 Then B<RONQj_  
       point_in = True ;R!
H\  
    Else p o`$^TB^+  
       point_in = False h,+=h;!  
    End If ]>L]?Rm  
End Function

'得到点半径,得到交点坐标函数 U;GoC$b}|  
Function rr(p1x As Single, p1y As Single, p2x As Single, p2y As Single, p3x As Single, p3y As Single, p4x As Single, p4y As Single) As Single() wjJ1Psnx  
    '求得中心点坐标 +_dYfux  
Dim tt As String z)>{O
3  
Dim rt(3) As Single ["<(\v9P)  
    '判断是否平行 :gq@/COo(  
   acx = p3x - p1x %6'D!H?d  
   acy = p3y - p1y =7Vl{>*1N  
   bdx = p4x - p2x 9VE;I:NO3  
   bdy = p4y - p2y ELF`uWGE  
   If acx * bdy = acy * bdx Then %},G(>  
      rt(0) = 0 k#JG  
      Exit Function N{t:%[  
   Else C
JixK>Y^  
      '判断斜率存在否 \cP'#jZz  
      If p1x = p3x And p2x <> p4x Then EiN)TB^]  
         tt = "ac_n_bd_y" +[/r^C  
      ElseIf p1x <> p3x And p2x = p4x Then rcmAVl:$>  
         tt = "ac_y_bd_n" nln6:^w  
      ElseIf p1x <> p3x And p2x <> p4x Then ';,Bn9rv  
         tt = "ac_y_bd_y" +~Ay h[V  
      End If _vV&4>  
    Select Case tt vCSB8R  
         Case "ac_n_bd_y" -0da"AB  
            'bd线段方程 y9li<u<PF  
            k_bd = bdy / bdx )K>@$6H+2  
            b_bd = p2y - k_bd * p2x &AcFa<U  
            p_x = p1x |u r~s$8y-  
            p_y = k_bd * p_x + b_bd s;7qNwYO  
         Case "ac_y_bd_n" F^t?*   
            'ac线段方程 @:9fS  
            k_ac = acy / acx rDX'oP:  
            b_ac = p1y - k_ac * p1x BemkCj
2  
            p_x = p2x 2^#UO=ct  
            p_y = k_ac * p_x + b_ac d5"EvT  
        Case "ac_y_bd_y" SM+fG:4d  
           'ac，bd线段都要求 Y;F R"~^  
           k_ac = acy / acx RIEv*2_O  
           b_ac = p1y - k_ac * p1x .l=*R7~EU  
           k_bd = bdy / bdx u?;Vxh3@|  
           b_bd = p2y - k_bd * p2x 7E3SvC|M  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) ]Y&)98  
           p_y = k_ac * p_x + b_ac ,i?!3oLT  
        End Select 0nn]]B@l  
      rt(1) = p_x h<1dTl*  
      rt(2) = p_y Z#
6~N
/b  
     r`R~{;oT  
'计算最大半径
&^n>ZY,  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) M:Y*Tb6w  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) V<2fPDZ  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) VNrO(j DUv  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) j8Q5d`  
Dim bb(5) As Single Lp`<L-s  
  bb(1) = rr1 #C1A5JE&  
  bb(2) = rr2 B UQn+;be  
  bb(3) = rr3 f\);HJbg  
  bb(4) = rr4 2"+x(Ax  
  nb = rr1 |1+(Ny.%k  
For i = 1 To 4 s"',370  
    If nb <= bb(i) Then +'['HQ)  
       nb = bb(i) +#qt^NO  
    End If sh(kRrdY3  
Next i P%+or*  
    rt(0) = Sqr(nb) .pIR/2U\F  
    rr = rt() :#w+?LA*  
  End If ]LBvYjMY  
         *$Lz2 ]  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  $zC6(C(l  

ElQJ\%  
有热压工艺方面的人才或者资料分享下； :v#k&Uh3y  
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 5R,la\!bQ  

高手真多！

楼主威武霸气.