[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： </%H'V@  
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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： Dmi;# WY  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） F:g{rm[
  
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 16y$;kf8  
3.网点区域密度可调；把区域分成若干小块，每块的密度不同即可 85fDuJ9$Z"  

以下是几个重要的函数： h%s  
1.判断点在区域中函数 Ltw7b  
2.计算夹角函数 r8%,xA&  
3.转置函数 ,m?D\Pru  
4.得到区域中心点，及区域半径函数 LPn}QzH  
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） +E~`H^  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 $tHwJ!<$&  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single !O6Is'%B  
   cax = x2 - x1 Vk_&W.~  
   cay = y2 - y1 "3|"rc&F#  
   cbx = x2 - x3 Oc9>F\]_m  
   cby = y2 - y3 d`<^+p)oy  
   mo_jj = cax * cbx + cay * cby <57l|}8  
   mo_ca = Sqr(cax * cax + cay * cay)  KdJx#Lc  
   mo_cb = Sqr(cbx * cbx + cby * cby) %`'z^W  
   cos_acb = mo_jj / (mo_ca * mo_cb) Q|KD/s??  
   'ff_cos = cos_acb jgKL88J*\  
   If cos_acb >= 1 Then Ti|++oC/&  
   nn = 0 QeJ.o.m{  
   ElseIf cos_acb <= -1 Then _`{{39 F  
   nn = 3.14159265258979 \y`3LhY  
   Else RhNaYO  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) wV&f|JO0+  
   End If <1+6O[>{  
   'ff_angle = nn >MWpYp  
   ff_angle = nn * 180 / 3.14159265258979 {dx /p-Tv  
End Function

'判断点在区域内函数 EY&C[=  
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 RvSq KW8  
Dim aob, boc, cod, doa, sum As Single Y-3[KHD  
  If ppx = p1x And ppy = p1y Then U?F^D4CV\  
     point_in = True \_Kt6=
  
     Exit Function W+f&%En  
  End If +#uNQ`1v  
  If ppx = p2x And ppy = p2y Then
LbX6
p  
     point_in = True Dyk[ug5  
     Exit Function $#7J\=GZ+  
  End If }\939Y  
   If ppx = p3x And ppy = p3y Then Wbn[Q2h5  
     point_in = True 3']:1B  
     Exit Function &[ u6oAR  
  End If n;kciTD%wK  
     W-!Bl&jF[  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) ,M@m4bx  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) |pH* CCA  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) s1Tl.p5  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) /iTUex7T  
    sum = aob + boc + cod + doa @nx}6?p\,  
    If 360.01 > sum And sum > 359.99 Then 8PoH
BOxpc  
       point_in = True hX8gV~E=y  
    Else %O&m#)|  
       point_in = False xZP
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    End If <p^*Ydx  
End Function

'得到点半径,得到交点坐标函数 oEenm\ZI  
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() c?.r"5#  
    '求得中心点坐标  :Hzz{'  
Dim tt As String @.Z
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Dim rt(3) As Single *K+jsVDY  
    '判断是否平行 '&-5CpDUs  
   acx = p3x - p1x Mhv1K|4s  
   acy = p3y - p1y
]&C:>  
   bdx = p4x - p2x FQk_#BkK  
   bdy = p4y - p2y 8! H8[J  
   If acx * bdy = acy * bdx Then GUu\dl9WA'  
      rt(0) = 0 >'} Y1_S5  
      Exit Function K0O-WJ  
   Else YY#s=  
      '判断斜率存在否 S2rEy2\}:  
      If p1x = p3x And p2x <> p4x Then ?w]"~   
         tt = "ac_n_bd_y" {PODisl>\D  
      ElseIf p1x <> p3x And p2x = p4x Then [$( sUc(%  
         tt = "ac_y_bd_n" &/>;LgN  
      ElseIf p1x <> p3x And p2x <> p4x Then r,2Xu  
         tt = "ac_y_bd_y" q_<*esZ,  
      End If oLrkOn/aY  
    Select Case tt yhcNE8mkQ/  
         Case "ac_n_bd_y" ~\IF9!  
            'bd线段方程 UF&0&`@  
            k_bd = bdy / bdx ku/\16E/k  
            b_bd = p2y - k_bd * p2x MxO W)$f  
            p_x = p1x je&dioZ>  
            p_y = k_bd * p_x + b_bd h8f!<:rTS  
         Case "ac_y_bd_n" 2{A;du%&  
            'ac线段方程 Q`.'-iq  
            k_ac = acy / acx n-b>m7O(  
            b_ac = p1y - k_ac * p1x L6|Hgrj-u  
            p_x = p2x VHXI@UT*  
            p_y = k_ac * p_x + b_ac NuC-qG#  
        Case "ac_y_bd_y" Nb~,`bu,2  
           'ac，bd线段都要求 K#qoR/:  
           k_ac = acy / acx .S~@BI(|<  
           b_ac = p1y - k_ac * p1x j0g5<M  
           k_bd = bdy / bdx i\t753<Ys  
           b_bd = p2y - k_bd * p2x 2y3?!
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           p_x = -(b_bd - b_ac) / (k_bd - k_ac) x96qd%l/  
           p_y = k_ac * p_x + b_ac K :1g"  
        End Select 8[8|*8xqs  
      rt(1) = p_x .)LZ`Ge3F  
      rt(2) = p_y YV5Yx-+3w$  
     v6wRME;JA  
'计算最大半径 J.1O/Pw!.a  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) a?5WKO  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) ?qju DD  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) `wNm%*g  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) WMW1B}Z3  
Dim bb(5) As Single fuq( 2&^  
  bb(1) = rr1 FoE|Js  
  bb(2) = rr2 *:a'GC%/  
  bb(3) = rr3 PeO]lq  
  bb(4) = rr4 JZ`>|<W  
  nb = rr1 cNe0x2Z$?  
For i = 1 To 4 P+[QI U  
    If nb <= bb(i) Then  b<[jaI0  
       nb = bb(i) 3^{8_^I  
    End If )VNM/o%Q  
Next i ZB
-
QABn  
    rt(0) = Sqr(nb) ?#d6i$  
    rr = rt() z8IPhE@  
  End If ZAMeqP
t  
         DhZ:#mM{  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Mu{BUtkzG  

IxOc':/jY  
有热压工艺方面的人才或者资料分享下； F)SPaC4  
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 yzR=A%V8A  

高手真多！

楼主威武霸气.