[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： |Xk'd@<  
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关键点说几个： R7}=k)U?d@  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） 2jV.\
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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 bhDV U(%I6  
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 |1wfLJ4--l  

以下是几个重要的函数： iq2)oC_  
1.判断点在区域中函数 (T:OZmEO.  
2.计算夹角函数 ?=,4{(/)  
3.转置函数 ([SrIG>X  
4.得到区域中心点，及区域半径函数 C4wJSQl_I  
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） 5SPhdpIg@[  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 *FhD%><  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single CR8a)X4j#  
   cax = x2 - x1 y.,S}7l:
 
   cay = y2 - y1 vC$Q4>m  
   cbx = x2 - x3 8 Z|c!QIU  
   cby = y2 - y3 s+#|j;V<  
   mo_jj = cax * cbx + cay * cby pkTg.70wU  
   mo_ca = Sqr(cax * cax + cay * cay) YDh6XD<Z  
   mo_cb = Sqr(cbx * cbx + cby * cby) /IQl  
   cos_acb = mo_jj / (mo_ca * mo_cb) 8/q6vk><  
   'ff_cos = cos_acb oVi_X98R  
   If cos_acb >= 1 Then OS|uZ<"Rq3  
   nn = 0 'lmZ{a6  
   ElseIf cos_acb <= -1 Then 1$S;
#9PQ  
   nn = 3.14159265258979 S}fU2Wi  
   Else xX;@ BS  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) i>=d7'oR  
   End If 9gjI;*(z1  
   'ff_angle = nn )gM3,gSS  
   ff_angle = nn * 180 / 3.14159265258979 @ qFE6!  
End Function

'判断点在区域内函数 D@]gc&JN[  
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 [h"#Gwb=;  
Dim aob, boc, cod, doa, sum As Single TTNgnP  
  If ppx = p1x And ppy = p1y Then -Vj'QqZ  
     point_in = True lo}[o0X  
     Exit Function !: e0cV  
  End If *7L*:g  
  If ppx = p2x And ppy = p2y Then 44s K2  
     point_in = True ,p(4OZz5,  
     Exit Function M:m-iX  
  End If L,@OOBD  
   If ppx = p3x And ppy = p3y Then 9ICC2%j|  
     point_in = True 5f54E|vD  
     Exit Function _ F0qqj  
  End If s3G\L<~mB  
     IKJ~sw~AQ  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) 3F%Qq7v  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) Effp^7 3  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) P1PP#>E-2  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) zs+[Aco)  
    sum = aob + boc + cod + doa 6r"PtHr  
    If 360.01 > sum And sum > 359.99 Then 4SG22$7W  
       point_in = True id^U%4J  
    Else ?$O5w*  
       point_in = False X
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    End If wf7<#jIq  
End Function

'得到点半径,得到交点坐标函数 ArkFC  
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() V07x+ovq  
    '求得中心点坐标 >/"XX,3  
Dim tt As String b("JgE`  
Dim rt(3) As Single uTJi }4cw  
    '判断是否平行 UT[9ER
S  
   acx = p3x - p1x [5%/{W,~m  
   acy = p3y - p1y < %Qw dEO  
   bdx = p4x - p2x ]\nG1+ta  
   bdy = p4y - p2y $ql-"BB  
   If acx * bdy = acy * bdx Then MCma3^/1  
      rt(0) = 0 JxQwxey{  
      Exit Function X7kJ
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   Else IidZ
-Il  
      '判断斜率存在否 D} 0>x~  
      If p1x = p3x And p2x <> p4x Then D<7S P,D
 
         tt = "ac_n_bd_y" 
^F*)Jq  
      ElseIf p1x <> p3x And p2x = p4x Then Y6A]dk  
         tt = "ac_y_bd_n" b*Ipg8n+  
      ElseIf p1x <> p3x And p2x <> p4x Then ?Di
,'  
         tt = "ac_y_bd_y" 81a&99k#  
      End If U]sU b3  
    Select Case tt i:#R U^R  
         Case "ac_n_bd_y" Cu({%Gy+  
            'bd线段方程 ;hs:wLVa"  
            k_bd = bdy / bdx Fc}wuW  
            b_bd = p2y - k_bd * p2x 4\(;}M-R{  
            p_x = p1x <YL\E v/[  
            p_y = k_bd * p_x + b_bd Kw'Dzz%kN  
         Case "ac_y_bd_n" )ymF:]QC  
            'ac线段方程 eEsEW<su  
            k_ac = acy / acx lGB7(  
            b_ac = p1y - k_ac * p1x ;lGa.RD[a  
            p_x = p2x p!'
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            p_y = k_ac * p_x + b_ac se_zCS4Y  
        Case "ac_y_bd_y" Ao96[2U6  
           'ac，bd线段都要求 wri[#D {  
           k_ac = acy / acx af{;4Cr  
           b_ac = p1y - k_ac * p1x xSb/98;  
           k_bd = bdy / bdx uMsKF%m  
           b_bd = p2y - k_bd * p2x v03~=(  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) c%~'[W04\  
           p_y = k_ac * p_x + b_ac },a|WL3^  
        End Select D.Cm&  
      rt(1) = p_x !xo@i XL  
      rt(2) = p_y U7crbj;c)d  
     %o4d43uZ  
'计算最大半径 N5/TV%u  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) \g4\a?i  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) (kp}mSw  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) ">fgoDQ  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) ciC4V^f  
Dim bb(5) As Single uy\YJ.WMQ  
  bb(1) = rr1 n]Dq  
  bb(2) = rr2 1rPeh{SZ  
  bb(3) = rr3 LO"HwN43h  
  bb(4) = rr4 iI&SI#; _  
  nb = rr1 >4EcV1y  
For i = 1 To 4 nBiSc*  
    If nb <= bb(i) Then M~662]Ekk  
       nb = bb(i) ?7&VT1  
    End If 9:~,TH  
Next i 0jq&i#yNB  
    rt(0) = Sqr(nb) qE,%$0g  
    rr = rt() Zt!l3(*tt  
  End If KktTR`W  
         !Rb7q{@>  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  #P@r[VZ{6  

{2Ibd i  
有热压工艺方面的人才或者资料分享下； ;C<A}  
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 +~v(*s C  

高手真多！

楼主威武霸气.