[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： b@j**O>[q)  
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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： 8OE=7
PK  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ^UI{U1N~Bz  
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 kSx^Uu*  
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  pleLdGq  

以下是几个重要的函数： r}kQ<SRx  
1.判断点在区域中函数 >i^8K U  
2.计算夹角函数 cQ(zBf  
3.转置函数 ?+#|h;M8  
4.得到区域中心点，及区域半径函数 qxS=8#-`(  
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） rg Gm[SL*<  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 fik*-$V`  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single eeKErpj8A  
   cax = x2 - x1 VB 53n'  
   cay = y2 - y1 nx{_^sK  
   cbx = x2 - x3 j{k]8sI,H]  
   cby = y2 - y3 wz1fx>Q  
   mo_jj = cax * cbx + cay * cby  mZGAl1`8  
   mo_ca = Sqr(cax * cax + cay * cay) UcaLi&  
   mo_cb = Sqr(cbx * cbx + cby * cby) oU/CXz?H  
   cos_acb = mo_jj / (mo_ca * mo_cb) )P&>Tc?;z  
   'ff_cos = cos_acb \XDc{c]  
   If cos_acb >= 1 Then "^sh:{  
   nn = 0 0\fV'JDOR  
   ElseIf cos_acb <= -1 Then F3BWi[Xh  
   nn = 3.14159265258979 kb"
g  
   Else yX%q7ex
 
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) zadn`B#2  
   End If l!r2[T]I@7  
   'ff_angle = nn TNwBnMe  
   ff_angle = nn * 180 / 3.14159265258979 5/U|oZM"  
End Function

'判断点在区域内函数 NBLiwL37{  
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 ?&qa3y)wX:  
Dim aob, boc, cod, doa, sum As Single LW+a-i  
  If ppx = p1x And ppy = p1y Then syuW>Z8s
  
     point_in = True Xz/5Wis4  
     Exit Function Xr?(w(3  
  End If =m<; Jx5  
  If ppx = p2x And ppy = p2y Then $e(]L(o;  
     point_in = True <d2?A}<  
     Exit Function 93Z/|7  
  End If ~ ^)D#Lo  
   If ppx = p3x And ppy = p3y Then G)ppkH`qj  
     point_in = True WCa>~dF>  
     Exit Function !Q-h#']~L  
  End If +ZuT\P&kR5  
     \0}!qG![AA  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) !v^{n+  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) c~_nOd  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) F0yvV6;  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) M:%6$``  
    sum = aob + boc + cod + doa /O,>s  
    If 360.01 > sum And sum > 359.99 Then Ino$N|G[  
       point_in = True +I>u${sVx*  
    Else M4%u~Z:4h+  
       point_in = False (s:ihpI  
    End If RK7vR~kf<  
End Function

'得到点半径,得到交点坐标函数 _*tU.x|DP  
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() cRR[ci34k  
    '求得中心点坐标 \a_75^2  
Dim tt As String K;:_UJ>t  
Dim rt(3) As Single ^M:Y$9r_s  
    '判断是否平行 Dd:TFZo  
   acx = p3x - p1x pKxsK^O5[  
   acy = p3y - p1y >i6sJ)2?>  
   bdx = p4x - p2x .Y
w  
   bdy = p4y - p2y L|?$F*bs  
   If acx * bdy = acy * bdx Then JAQ y  
      rt(0) = 0 _Q9Mn-&qQ  
      Exit Function {V8yJ{.G  
   Else J?oI%r7^  
      '判断斜率存在否 _1c0pQ^}3  
      If p1x = p3x And p2x <> p4x Then W2$MH: j  
         tt = "ac_n_bd_y" Rm&^[mv  
      ElseIf p1x <> p3x And p2x = p4x Then uwL^Tq}Yh  
         tt = "ac_y_bd_n" Q)/V>QW  
      ElseIf p1x <> p3x And p2x <> p4x Then m1 tYDZ"
i  
         tt = "ac_y_bd_y" {^5LolCCH  
      End If /?ZO-]q  
    Select Case tt <W>T!;4!  
         Case "ac_n_bd_y" s%&/Zt  
            'bd线段方程 L:.z FW,  
            k_bd = bdy / bdx y;\m1o2  
            b_bd = p2y - k_bd * p2x jkQ%b.a  
            p_x = p1x v)f;dq^z-  
            p_y = k_bd * p_x + b_bd Y94^mt-  
         Case "ac_y_bd_n" N4[`pXM6
 
            'ac线段方程 !J6;F}Pd/  
            k_ac = acy / acx 5[[mS  
            b_ac = p1y - k_ac * p1x g3Xab  
            p_x = p2x Nf]h8d~  
            p_y = k_ac * p_x + b_ac wHT]&fZ  
        Case "ac_y_bd_y" 8t)?$j$  
           'ac，bd线段都要求 >=6 j:  
           k_ac = acy / acx IjPCaH.:t  
           b_ac = p1y - k_ac * p1x O)aWTI  
           k_bd = bdy / bdx ee}HQ.}Ja  
           b_bd = p2y - k_bd * p2x @^2?97i c  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) L0Ycf|[s,  
           p_y = k_ac * p_x + b_ac JK/gq}c  
        End Select > u!# 4  
      rt(1) = p_x oSl@E
I  
      rt(2) = p_y V JJ6q  
      LmZ"_  
'计算最大半径 joRrsxFU  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) n^t!+  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) Wik8V0(  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) SWLt5dV  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) W]CsKN,K  
Dim bb(5) As Single 8Y,imj\(v  
  bb(1) = rr1 )Jaq5OMA/  
  bb(2) = rr2 tk
X?iqKQ  
  bb(3) = rr3 Q1'4xWu  
  bb(4) = rr4 TPF5?  
  nb = rr1 tW -f_0a.  
For i = 1 To 4 ?'IY0^  
    If nb <= bb(i) Then Q H57[Yg  
       nb = bb(i) ]zATdfa  
    End If {8pN]=SaJ~  
Next i lDX\"Fq  
    rt(0) = Sqr(nb) PC<[$~  
    rr = rt() q2e=(]rKE{  
  End If P?o|N<46  
         i",7<01  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  Ot{~mMDp  

f0{j/+F_o  
有热压工艺方面的人才或者资料分享下； 5KTPlqm0qF  
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 Ps
M8J  

高手真多！

楼主威武霸气.