Each vertex in a poly contains a 32 bit flag variable.
每一个点在poly 控制一个32 位的 “旗帜” 我觉得像maya的悬浮列片。
This method returns a bitarray of the vertices that have specific bits in this flag variable set,
这个办法返回一个 bit数组 。在flag 中设置了所有的点都有相应的 bit 地方。
where the bits being tested are based on a combination of <flag> and <maskflag>.
polyop.getVertsByFlag <Poly poly> <int flag> mask:<int maskflag>
当在<int flag> mask:<int maskflag> 中的联合体的基础之上，
The default value for <maskflag> is 0.
maskflag 的缺省是数值是0
bit30 = bit.set 0 30 true ---这里有点明白了
当 为了使
bit30 = bit.set 0 1 true
(polyOp.getVertsByFlag $ bit30) 返回的是当前选择的点。
系统的解释 ：bit 1: vertex is selected
当为2 时
bit30 = bit.set 0 2 true
(polyOp.getVertsByFlag $ bit30) 为空。
系统的解释：bit 2: vertex is dead
当为3 时
bit30 = bit.set 0 3 true 返回的是4
(polyOp.getVertsByFlag $ bit30)
系统解释 ：bit 3: reserved
当为4 时
bit30 = bit.set 0 4 true 返回8 时
(polyOp.getVertsByFlag $ bit30)
系统解释 ： bit 4: indicates the vertex faces "backwards" in the current viewport
当为5—24 时
(polyOp.getVertsByFlag $ bit30)[12] --可返回对错
通过这些解释渐渐的有一点东西了
Internally, if <maskflag> is 0 then <maskflag> is set to the <flag> value, otherwise <flag> is
set to the bitwise-AND of <flag> and <maskflag>. Bit 2 of <maskflag> is then set, which prevents dead vertices
from being included in the resulting bitarray unless this bit was set in <mask>. Each bit in the resulting bitarray is
set if the bitwise-AND of the flag variable and <maskflag> is equal to the bitwise-AND of <flag> and <maskflag>.
The vertex level flags are:
bit 1: vertex is selected
bit 2: vertex is dead
bit 3: reserved
bit 4: indicates the vertex faces "backwards" in the current viewport
bit 5-24: reserved
bit 25-32: available for general use
polyop.getVertsByFlag <Poly poly> <int flag> mask:<int maskflag>
theObj = plane isSelected:true
convertto theObj editable_poly
nVerts = theObj.numverts ---顶点数。
bit30 = bit.set 0 30 true ---这里面现在还真的不知道什么意思。
bit31 = bit.set 0 31 true ----看了帮助这个就好了。
bit32 = bit.set 0 32 true
--\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
theObj =$
bit30 = bit.set 0 4 true --都可以进行设置 设定为2 时 bit 2: vertex is dead
nVerts = $.numverts
-- set a bit on first 3/4 or so verts
(
flagsToSet = bit30
flagsToMask = 0
vertexSet = #{1..(3*nVerts/4)} --对这里是设置了一个顶点的3/4
theObj.setVertexFlags vertexSet flagsToSet flagMask:flagsToMask generateUndoRecord:true
ok
)
(polyOp.getVertsByFlag $ bit30)
-- and another on middle block
(
flagsToSet = bit31
flagsToMask = 0
vertexSet = #{(nVerts/3)..(nVerts-4)}
theObj.setVertexFlags vertexSet flagsToSet flagMask:flagsToMask generateUndoRecord:true
ok
)
-- set a bit on last 2 verts
(
flagsToSet = bit32
flagsToMask = 0
vertexSet = #{(nVerts-2)..nVerts}
theObj.setVertexFlags vertexSet flagsToSet flagMask:flagsToMask generateUndoRecord:true
ok
)
----都可以用上面的进行设置。
(polyOp.getVertsByFlag theObj bit30) --用他对储蓄存的进行查看。
(
-- get verts with bit30, 31, 32 set
format "30: %\n" (polyOp.getVertsByFlag theObj bit30)
format "31: %\n" (polyOp.getVertsByFlag theObj bit31)
format "32: %\n" (polyOp.getVertsByFlag theObj bit32)
-- get verts with bit30 set, but not bit31
format "30 and !31: %\n" (polyOp.getVertsByFlag theObj bit30 mask:(bit30+bit31))
-- get verts with bit31 not set, doesn't matter what the <flag>
-- value is as long as it's not bit31
format "!31: %\n" (polyOp.getVertsByFlag theObj bit30 mask:(bit31))
-- get verts with bit30 and bit31 set
format "30 and 31: %\n" (polyOp.getVertsByFlag theObj (bit30+bit31))
-- get verts with neither bit31 or bit32 set, doesn't matter what
-- the <flag> value is as long as it's not bit31 or bit32
format "!(31 or 32): %\n" (polyOp.getVertsByFlag theObj bit30 mask:(bit31+bit32))
)
关于这一块，要注意点，下面还有边面的形式，就想不到呢里用。先不学习了。段一下