[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： dX{|-;6vm  
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关键点说几个： Wz}RJC7p  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） oGx OJyD  
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 @G[P|^B  
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 eyf\j,xP&  

以下是几个重要的函数： i71,
 
1.判断点在区域中函数 4V9DP
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2.计算夹角函数 ps=jGh[  
3.转置函数 j9Ptd$Uj  
4.得到区域中心点，及区域半径函数 =G3O7\KmH  
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） 7;RhA5M  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 zM{'GB+en  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single UOHU1.3$T  
   cax = x2 - x1 B2t.;uz(,  
   cay = y2 - y1 ga&l.:lo  
   cbx = x2 - x3 }[XzM/t  
   cby = y2 - y3 JF!?i6V  
   mo_jj = cax * cbx + cay * cby R2WEPMH%  
   mo_ca = Sqr(cax * cax + cay * cay) }MAQhXI^O|  
   mo_cb = Sqr(cbx * cbx + cby * cby) rOQhS]TP*  
   cos_acb = mo_jj / (mo_ca * mo_cb) S'M=
P_-7  
   'ff_cos = cos_acb ks|[`FH  
   If cos_acb >= 1 Then jV Yt=j*"V  
   nn = 0 834(kw+#9  
   ElseIf cos_acb <= -1 Then maQE Bi,  
   nn = 3.14159265258979 6}^0/76^,  
   Else 5Nc~cD%0tK  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) &EKP93  
   End If |d^r"wbs3  
   'ff_angle = nn {Ts@#V=:  
   ff_angle = nn * 180 / 3.14159265258979 `3+yu' Q'  
End Function

'判断点在区域内函数 wuE]ju<  
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 'teToE<i  
Dim aob, boc, cod, doa, sum As Single 4DI.RK9  
  If ppx = p1x And ppy = p1y Then eq.K77El{J  
     point_in = True N^7Qn*qt[  
     Exit Function bOjvrg;Sz\  
  End If UMR0S5`}  
  If ppx = p2x And ppy = p2y Then f!hQ"1[  
     point_in = True .,zrr&Po  
     Exit Function +7n;Bsk _  
  End If }[ LME Z  
   If ppx = p3x And ppy = p3y Then ,73kh  
     point_in = True lJ.:5$2H  
     Exit Function e3w4@V`  
  End If m[ *)sm  
     h(]aP<49L  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 4cJ7W_ >i6  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) H59}d oKH  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) +c4]}9f!  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) *y[i~{7:  
    sum = aob + boc + cod + doa hZNS$  
    If 360.01 > sum And sum > 359.99 Then vQB;a?)o  
       point_in = True 0[ MQp"z  
    Else ucP}( $  
       point_in = False K{)N:|y%!$  
    End If .),ql_sXr  
End Function

'得到点半径,得到交点坐标函数 =d>^q7s  
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() J.'}R2gT1  
    '求得中心点坐标 ]q@/:I9]  
Dim tt As String pvCn
+y/U;  
Dim rt(3) As Single .OFwGOL%  
    '判断是否平行 iaXpe
]w$n  
   acx = p3x - p1x yZ?|u57  
   acy = p3y - p1y q]Y [W1  
   bdx = p4x - p2x N&g9z{m7  
   bdy = p4y - p2y df@IC@`pB  
   If acx * bdy = acy * bdx Then W,&z:z>  
      rt(0) = 0 dx['7l;I  
      Exit Function #
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   Else vg@kPuOiO  
      '判断斜率存在否 ;Zfglid  
      If p1x = p3x And p2x <> p4x Then 7"}<J7"})  
         tt = "ac_n_bd_y" =7%1]  
      ElseIf p1x <> p3x And p2x = p4x Then I2G4j/c=z  
         tt = "ac_y_bd_n" I*cB Ha  
      ElseIf p1x <> p3x And p2x <> p4x Then 7hAFK  
         tt = "ac_y_bd_y" (p4|,\+  
      End If I|jGu9G  
    Select Case tt hAx#5@*5  
         Case "ac_n_bd_y" t(3<w)r2  
            'bd线段方程 /)I:Cz/f  
            k_bd = bdy / bdx !YD~o/t@|  
            b_bd = p2y - k_bd * p2x 5IOMc4v  
            p_x = p1x Vs@
[="  
            p_y = k_bd * p_x + b_bd cRYnQ{$'  
         Case "ac_y_bd_n" 4o7(cP  
            'ac线段方程 TAfLC)  
            k_ac = acy / acx ul0]\(sS:  
            b_ac = p1y - k_ac * p1x ^Mw>'*5^  
            p_x = p2x kmHIU}Z  
            p_y = k_ac * p_x + b_ac :4 9ttJl  
        Case "ac_y_bd_y" #H9J/k_  
           'ac，bd线段都要求 E"LSM]^^<f  
           k_ac = acy / acx jSMvZJX3n  
           b_ac = p1y - k_ac * p1x r![RRa^  
           k_bd = bdy / bdx rv`kP"I  
           b_bd = p2y - k_bd * p2x pfd||Z  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) kMD:~V  
           p_y = k_ac * p_x + b_ac jys1Ki  
        End Select aXi5~,Ks_  
      rt(1) = p_x 8yr_A[S8.  
      rt(2) = p_y K/oC+Z;K  
     IIC1T{D}v  
'计算最大半径 ?UD2

}D[M  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) E]zTd$v6  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) fq^D
<c{3  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) CXC,@T  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) `fw:   
Dim bb(5) As Single C.SGm  
  bb(1) = rr1 ?.E ixGzI^  
  bb(2) = rr2  ByP  
  bb(3) = rr3 K9JW&5Q  
  bb(4) = rr4 r{DR$jD  
  nb = rr1 `[T|Ck5  
For i = 1 To 4 3yNILj  
    If nb <= bb(i) Then y+3< ] N  
       nb = bb(i) pqaQ%|<  
    End If Vc}#Ok  
Next i g3B zi6$m  
    rt(0) = Sqr(nb) &(H;Bin'  
    rr = rt() oU }eAZj{  
  End If wNsAVUjLe  
         om$x;L6  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Y\!* c=@k  

gC-3ghmgS  
有热压工艺方面的人才或者资料分享下； `Q d_Gu,M  
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 jOs&E^">&B  

高手真多！

楼主威武霸气.