【转帖】hatch的面积？
 

hatch的面积？
www.dimcax.com
hatch的面积？
这个问题，一个办法就是用vba的hatch对象的area属性了，cad
等我来改写了
这个不行的，
admin 发表于
快点改吧，我等着！
我在试那个所谓的com，没学过搞不明白，怎么才能把.net的hatch对象变成autodesk.autocad.interop.common.acadhatch呢？ctype不行，给指点一下好不？
嘿嘿，原来是这样：
imports autodesk.autocad.interop.common
imports autodesk.autocad.interop
public class study01
private db as database = hostapplicationservices.workingdatabase
private ed as editor = autodesk.autocad.applicationservices.application.documentmanager.mdiactivedocument.editor
private tm as autodesk.autocad.databaseservices.transactionmanager = db.transactionmanager
<commandmethod("test", commandflags.modal)> _
public sub test_com()
dim myt as transaction = tm.starttransaction
try
dim resent as promptentityresult = ed.getentity(vbcrlf & "选择填充")
if resent.status = promptstatus.ok then
dim ohatch as hatch = ctype(tm.getobject(resent.objectid, databaseservices.openmode.forread), hatch)
dim oacadhatch as acadhatch
oacadhatch = ctype(ohatch.acadobject, acadhatch)
ed.writemessage(oacadhatch.area.tostring)
end if
catch ex as system.exception
ed.writemessage(ex.message)
finally
myt.dispose()
end try
end sub
end class
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下面的代码证明，.net里的hatch.geometricextents得到的填充对象的外框是不正确的，它会把坐标原点放进去，而com的acadhatch.getboundingbox却不会。看来autocad的这个.net包装还很需要改进。
<commandmethod("test", commandflags.modal)> _
public sub test_hatch_extents()
dim myt as transaction = tm.starttransaction
try
dim resent as promptentityresult = ed.getentity(vbcrlf & "选择填充")
if resent.status = promptstatus.ok then
dim ohatch as hatch = ctype(tm.getobject(resent.objectid, databaseservices.openmode.forread), hatch)
dim oextents as extents3d = ohatch.geometricextents()
ed.writemessage(vbcrlf & oextents.tostring) '
dim oacadhatch as acadhatch = ctype(ohatch.acadobject, acadhatch)
dim omin as object = nothing, omax as object = nothing
oacadhatch.getboundingbox(omin, omax)
dim amin as array = ctype(omin, system.array)
ed.writemessage(vbcrlf & amin.getvalue(0).tostring & "," & amin.getvalue(1).tostring)
end if
catch ex as system.exception
ed.writemessage(ex.message)
finally
myt.dispose()
end try
end sub
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