[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： eb#yCDIC  
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关键点说几个： \3hj/   
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） E2nsBP=5C  
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 Iq?#kV9)  
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 {CaTu5\  

以下是几个重要的函数： ' X9D(?O  
1.判断点在区域中函数 DGJt$o=&@  
2.计算夹角函数 bm\Zp  
3.转置函数 ]n 'FD|  
4.得到区域中心点，及区域半径函数 xgQ&'&7l  
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） isR)^fI|  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 HxnWM\p  
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single rk)h_zN  
   cax = x2 - x1 d) $B  
   cay = y2 - y1 7H$wpn Zln  
   cbx = x2 - x3 ;Ob`B@!=b  
   cby = y2 - y3 XNaiMpp'  
   mo_jj = cax * cbx + cay * cby QT)5-Jy  
   mo_ca = Sqr(cax * cax + cay * cay) !)//b]  
   mo_cb = Sqr(cbx * cbx + cby * cby) @UwDsx&2(t  
   cos_acb = mo_jj / (mo_ca * mo_cb) SLjSNuOP  
   'ff_cos = cos_acb 7f_tH_(  
   If cos_acb >= 1 Then )2&y;{]  
   nn = 0 @#1T-*  
   ElseIf cos_acb <= -1 Then d#cEAy  
   nn = 3.14159265258979 O <#H5/Tq  
   Else \wb
0%> 0  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) }HLV'^"k  
   End If d3&l!DoX  
   'ff_angle = nn zi?G wh~  
   ff_angle = nn * 180 / 3.14159265258979 zcCGREe=  
End Function

'判断点在区域内函数 P0O=veCf  
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 *$*V#,V-  
Dim aob, boc, cod, doa, sum As Single /=+Bc=<lZ  
  If ppx = p1x And ppy = p1y Then CZ|h` ";P2  
     point_in = True 2&KM&NX~  
     Exit Function 3c[< #]8S  
  End If }:xj%?ki  
  If ppx = p2x And ppy = p2y Then q7aH=dhw  
     point_in = True .NRSBk  
     Exit Function 6[S-%|f  
  End If $G D@e0  
   If ppx = p3x And ppy = p3y Then h:~ 8WV|  
     point_in = True \\v1\  
     Exit Function
i_ z4;%#?  
  End If AB[#
  
     *sYvV,  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) i+4!nf{K  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) BaXf=RsZ  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) g$9EI\a  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) 9Pjw<xt  
    sum = aob + boc + cod + doa XyrQJ}WR|  
    If 360.01 > sum And sum > 359.99 Then `71(wf1q[f  
       point_in = True Q%.F Mf  
    Else NsUP0B}.  
       point_in = False 1<$z-y'  
    End If -0:Equ?pz  
End Function

'得到点半径,得到交点坐标函数 W'}^m*F  
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() x A"V!8C  
    '求得中心点坐标 kJK:1;CM?.  
Dim tt As String <nbc RO.  
Dim rt(3) As Single `~+[pY1r  
    '判断是否平行 R~H+.Vh  
   acx = p3x - p1x A`ScAzx5{  
   acy = p3y - p1y sQgJ`+Y8_  
   bdx = p4x - p2x H0?Vq8I?  
   bdy = p4y - p2y 0p[-M`D  
   If acx * bdy = acy * bdx Then %w#8t#[,6  
      rt(0) = 0 ^_!2-QY.~  
      Exit Function dZ%rmTE(H  
   Else v%!'vhf_K  
      '判断斜率存在否 66Bx,]"6  
      If p1x = p3x And p2x <> p4x Then $@@@<
/VbP  
         tt = "ac_n_bd_y" 7]lUPLsl  
      ElseIf p1x <> p3x And p2x = p4x Then KxUO=v<u  
         tt = "ac_y_bd_n" x{I, gu|+  
      ElseIf p1x <> p3x And p2x <> p4x Then I.hy"y2&  
         tt = "ac_y_bd_y" 4M*!'sG\  
      End If I6RF;m:Jw  
    Select Case tt WdJJt2'  
         Case "ac_n_bd_y" )A=&3Ui)ab  
            'bd线段方程 KAR **Mp+  
            k_bd = bdy / bdx =sh
3&8  
            b_bd = p2y - k_bd * p2x 1}"Prx-  
            p_x = p1x v/~Lfi  
            p_y = k_bd * p_x + b_bd rkWiGiisM  
         Case "ac_y_bd_n" 5[|ZceY  
            'ac线段方程 $i"IOp  
            k_ac = acy / acx 734<X6^1  
            b_ac = p1y - k_ac * p1x 
TpAso[r  
            p_x = p2x 9Je+|+s]  
            p_y = k_ac * p_x + b_ac ">x"BP  
        Case "ac_y_bd_y" H rI(uZ]  
           'ac，bd线段都要求 @nxpcHj  
           k_ac = acy / acx `!lQd}W  
           b_ac = p1y - k_ac * p1x &"mWi-Mpl  
           k_bd = bdy / bdx w'zSV1  
           b_bd = p2y - k_bd * p2x (%SKTM  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) cs0rz= ZdH  
           p_y = k_ac * p_x + b_ac ak$D1#hY  
        End Select uow{a*qd6  
      rt(1) = p_x RLR\*dL1  
      rt(2) = p_y |0xP'(  
     33OkYC%
e  
'计算最大半径 $_Q]3"U  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) gaU1A"S}  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) cNiNLwc  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) "`Y.5
.  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) *:8,w?Nt  
Dim bb(5) As Single IyoitIbLl  
  bb(1) = rr1 Z:.*fs5  
  bb(2) = rr2 y!/:1BHlm  
  bb(3) = rr3 Q+; N(\  
  bb(4) = rr4 &2,^CG  
  nb = rr1 ^\7GF
pc  
For i = 1 To 4 9a0|iy  
    If nb <= bb(i) Then ,| ~Pa  
       nb = bb(i) A1F!I4p5  
    End If .9@y*_9  
Next i CMC9%uq  
    rt(0) = Sqr(nb) m\@q2l-  
    rr = rt() ~As_O6JI  
  End If O>[B"mMt  
         `P?!2\/  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  KN".0WU  

liPaT  
有热压工艺方面的人才或者资料分享下； qkBCI,X_Y  
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 w]O,xO  

高手真多！

楼主威武霸气.