[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： ^Xu4N"@  
LIQ].VxIs  
j2.7b1s  

关键点说几个： p8?v o?^  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） Hrph>v  
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 Bx#=$ka  
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 4RYH^9;>K  

以下是几个重要的函数： CH 29kQ  
1.判断点在区域中函数 2Q5@2jT  
2.计算夹角函数 6N5(DD  
3.转置函数 Ke?,AWfG  
4.得到区域中心点，及区域半径函数 hqmE]hwc  
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） "J=Cy@SSa  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 &ah%^Z4um  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single *4}NLUVX
 
   cax = x2 - x1 vc&+qI+I3  
   cay = y2 - y1 f17E2^(I(}  
   cbx = x2 - x3 UU MB"3e  
   cby = y2 - y3 *Q/^ib9=  
   mo_jj = cax * cbx + cay * cby {7z]+h  
   mo_ca = Sqr(cax * cax + cay * cay) dS4zOz"  
   mo_cb = Sqr(cbx * cbx + cby * cby) J
~3m7  
   cos_acb = mo_jj / (mo_ca * mo_cb) Y%;X7VxU*  
   'ff_cos = cos_acb KvPCb%!ZP  
   If cos_acb >= 1 Then c {%mi  
   nn = 0 J&,hC%]  
   ElseIf cos_acb <= -1 Then ZL\^J8PRK  
   nn = 3.14159265258979 Kw"y#Ys]  
   Else X )tH23  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) MK)}zjw  
   End If \&;y:4&l8  
   'ff_angle = nn j2UQQFh  
   ff_angle = nn * 180 / 3.14159265258979 "8ellKh  
End Function

'判断点在区域内函数 fJc(  
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 w.(WG+  
Dim aob, boc, cod, doa, sum As Single d4;$=P  
  If ppx = p1x And ppy = p1y Then LkS tU)  
     point_in = True v7wyQx+Q  
     Exit Function 8xgBNQdPT  
  End If Jcze.t  
  If ppx = p2x And ppy = p2y Then B=& [Z2  
     point_in = True _uMG?Sbx  
     Exit Function *m+FMyr  
  End If  &kmaKc  
   If ppx = p3x And ppy = p3y Then x,25ROaHY  
     point_in = True iIX%%r+  
     Exit Function -@"3`uv"  
  End If @M4c/k}  
     >*ls} q^  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) )LFbz#;Y  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) 3Z9Yzv)A  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) C?gqX0[ q  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 9S@x  
    sum = aob + boc + cod + doa fGlvum  
    If 360.01 > sum And sum > 359.99 Then Y:TfD{Xgc  
       point_in = True MLHCBRi  
    Else +?U[362>  
       point_in = False %QEBY>|lI  
    End If  g]?pY  
End Function

'得到点半径,得到交点坐标函数 lOVcX
Ae}  
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() @iuX~QA[9  
    '求得中心点坐标 (x2?{\?  
Dim tt As String h#r~2\q4ei  
Dim rt(3) As Single &SbdX  
    '判断是否平行 #U`AK9rP_g  
   acx = p3x - p1x :KO&j"[  
   acy = p3y - p1y
V*\hGNV  
   bdx = p4x - p2x V0,J
TWc  
   bdy = p4y - p2y yHw @Z  
   If acx * bdy = acy * bdx Then .J O3#  
      rt(0) = 0 md+pS"8o;  
      Exit Function }jCO@v;  
   Else t/Io.d   
      '判断斜率存在否 ZMgsuzg  
      If p1x = p3x And p2x <> p4x Then Zo&i0%S\E  
         tt = "ac_n_bd_y" Y bJg{Sb  
      ElseIf p1x <> p3x And p2x = p4x Then =fRS UtX  
         tt = "ac_y_bd_n" ,:(s=JN+  
      ElseIf p1x <> p3x And p2x <> p4x Then {UP[iw$~  
         tt = "ac_y_bd_y" d9S/_iCI  
      End If (7G4v  
    Select Case tt A|f6H6UUx  
         Case "ac_n_bd_y" )]C]KB  
            'bd线段方程 "ZGP,=?y2  
            k_bd = bdy / bdx Li5&^RAo|J  
            b_bd = p2y - k_bd * p2x WBWW7
HK  
            p_x = p1x no<$=(11i  
            p_y = k_bd * p_x + b_bd n5d8^c!2  
         Case "ac_y_bd_n" *xNc^&.  
            'ac线段方程 t7-]OY7%w_  
            k_ac = acy / acx *G.vY#h  
            b_ac = p1y - k_ac * p1x ulsU~WW7r  
            p_x = p2x
?P0b/g  
            p_y = k_ac * p_x + b_ac ~_EDJp1J  
        Case "ac_y_bd_y" }X{rE|@  
           'ac，bd线段都要求 Q")Xg:  
           k_ac = acy / acx :%sBY0 yF  
           b_ac = p1y - k_ac * p1x AA=Ob$2$  
           k_bd = bdy / bdx A3/[9}(U  
           b_bd = p2y - k_bd * p2x \09A"fs{  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) {4 Yxh8  
           p_y = k_ac * p_x + b_ac cQt&%SVT]E  
        End Select z<55[~3  
      rt(1) = p_x !j'LZ7  
      rt(2) = p_y : b`N(]  
     0C :8X   
'计算最大半径 z9S (<  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) es6YxMg  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) 4O-LLH  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) 6{.U7="  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) qa^cJ1@  
Dim bb(5) As Single Uwkxc  
  bb(1) = rr1 a4ViVy  
  bb(2) = rr2 bSw^a{~)  
  bb(3) = rr3 @!OXLM   
  bb(4) = rr4 u1X^#K$nu'  
  nb = rr1 nvndgeSy  
For i = 1 To 4 aH."| *.  
    If nb <= bb(i) Then 9~W]D!m,  
       nb = bb(i) ^ l#6Es  
    End If Kb+SssF  
Next i JY CMW!~  
    rt(0) = Sqr(nb) Aeh#  
    rr = rt() &6s&nx  
  End If -/?)0E  
         ,1~zYL?  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Ut2T:%m{  

ykbfK$jz  
有热压工艺方面的人才或者资料分享下； <|k :%  
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 OD7A(28  

高手真多！

楼主威武霸气.