【转帖】association pixel-measurement unit how
 

association pixel->measurement unit: how?

association pixel->measurement unit: how?
hi,
working with dwgdirect a question came in my mind.
how association pixel->measurement unit is done?
how can i set it?
thank you
walter
myzhar
==============
ing. walter lucetti
geomind srl
pisa - italy
==============

myzhar
# 9th february 2006, 03:49 am

softdev join date: jun 2002
location: st'petersburg, russia
posts: 522

oddbviewport (for paper space) and oddbviewporttablerecord (for model space) objects are responcible for holding data, from which transform world -> device coordinates is calculated.
sincerely yours,
george udov

george udov
# 9th february 2006, 03:51 am

registered user join date: feb 2006
location: pisa
posts: 69

quote:
originally posted by george udov
oddbviewport (for paper space) and oddbviewporttablerecord (for model space) objects are responcible for holding data, from which transform world -> device coordinates is calculated.
when i load a dwg file and associate the database to a device, the association world->device is done automatically?
can i change it?
myzhar
==============
ing. walter lucetti
geomind srl
pisa - italy
==============

myzhar
# 9th february 2006, 04:02 am

softdev join date: jun 2002
location: st'petersburg, russia
posts: 522

quote:
when i load a dwg file and associate the database to a device, the association world->device is done automatically?
yes. it is done in setuplayoutviews().
quote:
can i change it?
yes. see zoom functionality in odamfcapp - it is a sample.
sincerely yours,
george udov

george udov
# 9th february 2006, 04:10 am

registered user join date: feb 2006
location: pisa
posts: 69

ok, perfect.
it was like i supposed.
the question came because i have a problem calculating bounding box of the dwg.
using this code:
code:
odgsview * gview = mdeviceptr->viewat(0);
odabstractviewpeptr pviewabs(gview);
odgeboundblock3d boxext;
pviewabs->viewextents(gview,boxext);
odgematrix3d world2eye= gview->viewingmatrix().inverse();
boxext.transformby(world2eye);//the box in wcs...*/
i obtain the result in attachment.
i think that odgsview by default adds a white space between dwg drawing zone and view border... is this correct?
is there a way to make this thing in a more clever way?
thank you again,
walter
myzhar
==============
ing. walter lucetti
geomind srl
pisa - italy
==============

myzhar
# 9th february 2006, 04:11 am

registered user join date: feb 2006
location: pisa
posts: 69

please forgive me,
i forgot the attachment
attached images (183.7 kb, 8 views)

myzhar
==============
ing. walter lucetti
geomind srl
pisa - italy
==============

myzhar

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oddbviewport (for paper space) and oddbviewporttablerecord (for model space) objects are responcible for holding data, from which transform world -> device coordinates is calculated.
sincerely yours,
george udov

quote:
originally posted by george udov
oddbviewport (for paper space) and oddbviewporttablerecord (for model space) objects are responcible for holding data, from which transform world -> device coordinates is calculated.
when i load a dwg file and associate the database to a device, the association world->device is done automatically?
can i change it?
myzhar
==============
ing. walter lucetti
geomind srl
pisa - italy
==============

quote:
when i load a dwg file and associate the database to a device, the association world->device is done automatically?
yes. it is done in setuplayoutviews().
quote:
can i change it?
yes. see zoom functionality in odamfcapp - it is a sample.
sincerely yours,
george udov

ok, perfect.
it was like i supposed.
the question came because i have a problem calculating bounding box of the dwg.
using this code:
code:
odgsview * gview = mdeviceptr->viewat(0);
odabstractviewpeptr pviewabs(gview);
odgeboundblock3d boxext;
pviewabs->viewextents(gview,boxext);
odgematrix3d world2eye= gview->viewingmatrix().inverse();
boxext.transformby(world2eye);//the box in wcs...*/
i obtain the result in attachment.
i think that odgsview by default adds a white space between dwg drawing zone and view border... is this correct?
is there a way to make this thing in a more clever way?
thank you again,
walter
myzhar
==============
ing. walter lucetti
geomind srl
pisa - italy
==============

please forgive me,
i forgot the attachment
attached images (183.7 kb, 8 views)

myzhar
==============
ing. walter lucetti
geomind srl
pisa - italy
==============