[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： GBFw+v/|4  
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关键点说几个： 'sp-%YlM -  
1.区域是由点围成的，所以EXCEL中需要定义点的坐标（区域） ,y9iKkg  
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 -16K7yk  
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 j7FN\ cz  

以下是几个重要的函数： C^t(^9  
1.判断点在区域中函数 <)g8yA
  
2.计算夹角函数 Rj~  
3.转置函数 'B83m#HR#  
4.得到区域中心点，及区域半径函数 &X9Z W$C  
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） c/L>>t  
6.文件开启与关闭，这个最常见了，就不说了

'计算夹角函数 L?_7bXoD
 
Function ff_angle(x1 As Single, y1 As Single, x2 As Single, y2 As Single, x3 As Single, y3 As Single) As Single g#NZ ,~  
   cax = x2 - x1 53QfTP  
   cay = y2 - y1 sGY_{CZ:  
   cbx = x2 - x3 %I!:ITa  
   cby = y2 - y3 ;E~4)^  
   mo_jj = cax * cbx + cay * cby NRnRMY-  
   mo_ca = Sqr(cax * cax + cay * cay) [=uo1%  
   mo_cb = Sqr(cbx * cbx + cby * cby) )oo~m\`  
   cos_acb = mo_jj / (mo_ca * mo_cb) {qKxz9.y  
   'ff_cos = cos_acb ogM%N  
   If cos_acb >= 1 Then |eoid?=  
   nn = 0 STfyCtS  
   ElseIf cos_acb <= -1 Then k<w(i k1bi  
   nn = 3.14159265258979 tg4Y i|5  
   Else A]`El8_t"  
   nn = Atn(-cos_acb / Sqr(-cos_acb * cos_acb + 1)) + 2 * Atn(1) ezhDcI_T  
   End If A6<C-1 N}j  
   'ff_angle = nn {vaaFs  
   ff_angle = nn * 180 / 3.14159265258979 R8*Q$rH<  
End Function

'判断点在区域内函数 JGiKBm;  
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#_/ak$uF*  
Dim aob, boc, cod, doa, sum As Single hf!|\f  
  If ppx = p1x And ppy = p1y Then k'`m97B  
     point_in = True tc_f;S`k  
     Exit Function 5yh/0i5|  
  End If MFJE6ei  
  If ppx = p2x And ppy = p2y Then z;]CmR@Ki  
     point_in = True >1L=,M  
     Exit Function '2J0>Bla  
  End If XA0(f*  
   If ppx = p3x And ppy = p3y Then "re-@Baw  
     point_in = True "SWMk!  
     Exit Function 71FeDpe  
  End If NW$H"}+o  
     1,2EhfX|s  
    aob = ff_angle(p1x, p1y, ppx, ppy, p2x, p2y) '/0#lF  
    boc = ff_angle(p2x, p2y, ppx, ppy, p3x, p3y) :(3|HTz  
    cod = ff_angle(p3x, p3y, ppx, ppy, p4x, p4y) maMHZ\Q  
    doa = ff_angle(p4x, p4y, ppx, ppy, p1x, p1y) (lA.3 4.p  
    sum = aob + boc + cod + doa Gtv,Izt  
    If 360.01 > sum And sum > 359.99 Then pvWau1ArNq  
       point_in = True &0N<ofYX  
    Else 1F[L"W;r  
       point_in = False q)u2Y]  
    End If ;sdN-mb  
End Function

'得到点半径,得到交点坐标函数 .;/L2Jv  
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() =?}twC$  
    '求得中心点坐标 )9"oL!2h  
Dim tt As String U S
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Dim rt(3) As Single |fsm8t<~8  
    '判断是否平行 MKGS`X]<J  
   acx = p3x - p1x `hh9"Ws%  
   acy = p3y - p1y Gu(lI ~  
   bdx = p4x - p2x ;~ 4k7Uz  
   bdy = p4y - p2y ^~ =9  
   If acx * bdy = acy * bdx Then O0~vf[i];  
      rt(0) = 0 N?r>%4  
      Exit Function $j` $[tX6l  
   Else qV1O-^&[f=  
      '判断斜率存在否 Rz <OF^Iy  
      If p1x = p3x And p2x <> p4x Then ;|ub!z9GG  
         tt = "ac_n_bd_y" Go\VfLLw  
      ElseIf p1x <> p3x And p2x = p4x Then D=?{8'R'  
         tt = "ac_y_bd_n" Eyh|a.)-  
      ElseIf p1x <> p3x And p2x <> p4x Then @98;VWY\  
         tt = "ac_y_bd_y" =6%|?5G  
      End If 54p tP  
    Select Case tt @Z(rgF{{  
         Case "ac_n_bd_y" [5ethM  
            'bd线段方程 w*LbH]l<-  
            k_bd = bdy / bdx S0w> hr  
            b_bd = p2y - k_bd * p2x 'UwI*EW2S  
            p_x = p1x WnxEu3U  
            p_y = k_bd * p_x + b_bd 3><u*0qe%I  
         Case "ac_y_bd_n" \^532FIw6  
            'ac线段方程 i s"vekC  
            k_ac = acy / acx 6XUuGxQV/  
            b_ac = p1y - k_ac * p1x S)\8|ym6!  
            p_x = p2x \3Jq_9Xv  
            p_y = k_ac * p_x + b_ac L ^Y3=1#"g  
        Case "ac_y_bd_y" )@7DsV/M  
           'ac，bd线段都要求 'w<BJTQIL  
           k_ac = acy / acx )qM|3],  
           b_ac = p1y - k_ac * p1x >Wi s.e%b  
           k_bd = bdy / bdx 2hOPzv&B  
           b_bd = p2y - k_bd * p2x f@z*3I;  
           p_x = -(b_bd - b_ac) / (k_bd - k_ac) <!x+eE`  
           p_y = k_ac * p_x + b_ac L@)&vn]  
        End Select q(]f]Vl|0  
      rt(1) = p_x # mT]j""  
      rt(2) = p_y NrJzVGeS  
      WR.x&m
>  
'计算最大半径 qc8Ta"  
   rr1 = (p1x - p_x) * (p1x - p_x) + (p1y - p_y) * (p1y - p_y) \2DE==M)P  
   rr2 = (p2x - p_x) * (p2x - p_x) + (p2y - p_y) * (p2y - p_y) g'lT  
   rr3 = (p3x - p_x) * (p3x - p_x) + (p3y - p_y) * (p3y - p_y) E20&hc5 8  
   rr4 = (p4x - p_x) * (p4x - p_x) + (p4y - p_y) * (p4y - p_y) 5{l1A(b  
Dim bb(5) As Single (aKZ5>>cN  
  bb(1) = rr1 ZlR!s!vv  
  bb(2) = rr2 ?ApRJm:T  
  bb(3) = rr3 T0|H9>M  
  bb(4) = rr4 uEd,rEB>  
  nb = rr1 xPQL?.  
For i = 1 To 4 zXre~b03ZS  
    If nb <= bb(i) Then s44iEh=V(I  
       nb = bb(i) 9N Le&o  
    End If Eb@MfL  
Next i (([I]q  
    rt(0) = Sqr(nb) 1r4,XSk  
    rr = rt() sbla`6Fb  
  End If 0=[0|`x  
         Q=+8/b  
End Function

高手啊.人才啊.

lifei0715:高手啊.人才啊. (2013-04-08 19:15)  h=mv9=x  

Ug`
  
有热压工艺方面的人才或者资料分享下； nTQ (JDf  
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 {8i}Ow  

高手真多！

楼主威武霸气.