2005-november.txt

acis说明文档

From schmiddie78 at gmail.com  Tue Nov  1 10:07:57 2005
From: schmiddie78 at gmail.com (Stefan Schmidt)
Date: Tue Nov  1 10:08:22 2005
Subject: [Acis-alliance] api_sweep_with_options() problems
In-Reply-To: <[e-mail]>
References: <[e-mail]>
Message-ID: <[e-mail]>

Hi all,

I am looking to construct a "WEDGE" body. This is basically a 
rectangular box (define by height, width, length) cut in half 
diagonally. I am not sure how to contruct this in ACIS given the height, 
width, length. Any suggestions? Thanks.

Stefan

ESWAR wrote:
> Hi,
> 	Call api_initialize_sweeping() function before calling
> api_sweep_with_options(). After sweeping is done terminate sweeping by
> calling api_terminate_sweeping().
> 
> Regards,
> Eswar
> 
> -----Original Message-----
> From: [e-mail]
> [mailto:[e-mail]] On Behalf Of Stefan
> Schmidt
> Sent: Monday, October 24, 2005 10:54 PM
> To: [e-mail]
> Cc: [e-mail]
> Subject: [Acis-alliance] api_sweep_with_options() problems
> 
> Hi,
> 
> I am trying to run the following code snippet but pSweepResult is always
> 
> NULL. I do api_initialize_sweeping() and so forth before. Anybody knows 
> what else I need to take care of or which fields in sweep_options I have
> 
> to set? Thanks for any help.
> 
> SPAposition origin(0.0,0.0,0.0);
> SPAposition left(0.0,10.0,0.0);
> SPAposition right(10.0,0.0,0.0);
> FACE *fprofile = NULL;
> 	
> check_outcome(api_make_plface(origin, left, right, fprofile));
> FACE  *faces[1];
> faces[0] = fprofile;
> BODY  *sheet = NULL;
> check_outcome(api_mk_by_faces(NULL,1,faces,sheet));
> check_outcome(api_body_to_2d(sheet));
> ENTITY_LIST face_list;
> check_outcome(api_get_faces((ENTITY*)sheet,face_list));
> ENTITY *profile=face_list[0];
> sweep_options opt;
> opt.set_draft_angle(0.349);
> BODY* pSweepResult = 0;
> double dist = -30.0;
> outcome error = api_sweep_with_options(profile, dist, &opt,
> pSweepResult);
> _______________________________________________
> Acis-alliance mailing list
> [e-mail]
> http://lists.cs.columbia.edu/mailman/listinfo/acis-alliance
> 

From alames at sandia.gov  Tue Nov  1 10:20:57 2005
From: alames at sandia.gov (Ames, Arlo)
Date: Tue Nov  1 10:22:06 2005
Subject: [Acis-alliance] api_sweep_with_options() problems
Message-ID: <[e-mail]>

3 ways:
1.  construct a block of given h,w,l.  Construct a much larger block.
Translate and rotate the second block to correspond to the diagonal of
the first block.  Subtract second block from first.

2.  Construct a planar face corresponding to the triangular base of the
block.  Do api_sweep_with_options to construct the side faces.  Maybe
finish with api_cover_wires/api_cover_body to close the block.

3.  (Spatial doesn't like this one).  Perform all the low-level calls
yourself to construct the wedge.  You make a bunch of APOINTS, VERTEXs,
STRAIGHTs, EDGEs, COEDGEs, LOOPs, PLANEs, FACEs, SHELLs, LUMPs and
BODYs, and make sure all the sense bits, next and prev pointers, etc are
correct.

Approach 1 is trivially easy.

Approach 2 gets you into some of the vagaries of the documentation about
options in api_sweep_with_options, so plunges you into the same concerns
as the bottom posting below.

Approach 3 is by far the most labor intensive, and annoys Spatial
because they have issues with trying to swap libraries for minor
releases of their product.  I recommend it, though, as at least a mental
exercise, as it will greatly expand your understanding of ACIS.  Until
you understand all the data structures it's manipulating, you don't
fully appreciate what you have and will make mistakes regarding
computational and geometric difficulties the modeler faces.

Arlo Ames
[e-mail]

-----Original Message-----
From: [e-mail]
[mailto:[e-mail]] On Behalf Of Stefan
Schmidt
Sent: Tuesday, November 01, 2005 8:08 AM
To: [e-mail]
Subject: Re: [Acis-alliance] api_sweep_with_options() problems

Hi all,

I am looking to construct a "WEDGE" body. This is basically a
rectangular box (define by height, width, length) cut in half
diagonally. I am not sure how to contruct this in ACIS given the height,
width, length. Any suggestions? Thanks.

Stefan

ESWAR wrote:
> Hi,
> 	Call api_initialize_sweeping() function before calling 
> api_sweep_with_options(). After sweeping is done terminate sweeping by

> calling api_terminate_sweeping().
> 
> Regards,
> Eswar
> 
> -----Original Message-----
> From: [e-mail]
> [mailto:[e-mail]] On Behalf Of Stefan 
> Schmidt
> Sent: Monday, October 24, 2005 10:54 PM
> To: [e-mail]
> Cc: [e-mail]
> Subject: [Acis-alliance] api_sweep_with_options() problems
> 
> Hi,
> 
> I am trying to run the following code snippet but pSweepResult is 
> always
> 
> NULL. I do api_initialize_sweeping() and so forth before. Anybody 
> knows what else I need to take care of or which fields in 
> sweep_options I have
> 
> to set? Thanks for any help.
> 
> SPAposition origin(0.0,0.0,0.0);
> SPAposition left(0.0,10.0,0.0);
> SPAposition right(10.0,0.0,0.0);
> FACE *fprofile = NULL;
> 	
> check_outcome(api_make_plface(origin, left, right, fprofile)); FACE  
> *faces[1]; faces[0] = fprofile; BODY  *sheet = NULL; 
> check_outcome(api_mk_by_faces(NULL,1,faces,sheet));
> check_outcome(api_body_to_2d(sheet));
> ENTITY_LIST face_list;
> check_outcome(api_get_faces((ENTITY*)sheet,face_list));
> ENTITY *profile=face_list[0];
> sweep_options opt;
> opt.set_draft_angle(0.349);
> BODY* pSweepResult = 0;
> double dist = -30.0;
> outcome error = api_sweep_with_options(profile, dist, &opt, 
> pSweepResult); _______________________________________________
> Acis-alliance mailing list
> [e-mail]
> http://lists.cs.columbia.edu/mailman/listinfo/acis-alliance
> 

_______________________________________________
Acis-alliance mailing list
[e-mail]
http://lists.cs.columbia.edu/mailman/listinfo/acis-alliance



From schmiddie78 at gmail.com  Tue Nov  1 10:34:00 2005
From: schmiddie78 at gmail.com (Stefan Schmidt)
Date: Tue Nov  1 10:34:44 2005
Subject: [Acis-alliance] api_sweep_with_options() problems
In-Reply-To: <[e-mail]>
References: <[e-mail]>
Message-ID: <[e-mail]>

Thanks for your help. I am a bit under time pressure so I vote for a 
quick and dirty aproach: create a box and slice it up using the diagonal 
plane. Will have to do for now.

Ames, Arlo wrote:
> 3 ways:
> 1.  construct a block of given h,w,l.  Construct a much larger block.
> Translate and rotate the second block to correspond to the diagonal of
> the first block.  Subtract second block from first.
> 
> 2.  Construct a planar face corresponding to the triangular base of the
> block.  Do api_sweep_with_options to construct the side faces.  Maybe
> finish with api_cover_wires/api_cover_body to close the block.
> 
> 3.  (Spatial doesn't like this one).  Perform all the low-level calls
> yourself to construct the wedge.  You make a bunch of APOINTS, VERTEXs,
> STRAIGHTs, EDGEs, COEDGEs, LOOPs, PLANEs, FACEs, SHELLs, LUMPs and
> BODYs, and make sure all the sense bits, next and prev pointers, etc are
> correct.
> 
> Approach 1 is trivially easy.
> 
> Approach 2 gets you into some of the vagaries of the documentation about
> options in api_sweep_with_options, so plunges you into the same concerns
> as the bottom posting below.
> 
> Approach 3 is by far the most labor intensive, and annoys Spatial
> because they have issues with trying to swap libraries for minor
> releases of their product.  I recommend it, though, as at least a mental
> exercise, as it will greatly expand your understanding of ACIS.  Until
> you understand all the data structures it's manipulating, you don't
> fully appreciate what you have and will make mistakes regarding
> computational and geometric difficulties the modeler faces.
> 
> Arlo Ames
> [e-mail]
> 
> -----Original Message-----
> From: [e-mail]
> [mailto:[e-mail]] On Behalf Of Stefan
> Schmidt
> Sent: Tuesday, November 01, 2005 8:08 AM
> To: [e-mail]
> Subject: Re: [Acis-alliance] api_sweep_with_options() problems
> 
> Hi all,
> 
> I am looking to construct a "WEDGE" body. This is basically a
> rectangular box (define by height, width, length) cut in half
> diagonally. I am not sure how to contruct this in ACIS given the height,
> width, length. Any suggestions? Thanks.
> 
> Stefan
> 
> ESWAR wrote:
> 
>>Hi,
>>	Call api_initialize_sweeping() function before calling 
>>api_sweep_with_options(). After sweeping is done terminate sweeping by
> 
> 
>>calling api_terminate_sweeping().
>>
>>Regards,
>>Eswar
>>
>>-----Original Message-----
>>From: [e-mail]
>>[mailto:[e-mail]] On Behalf Of Stefan 
>>Schmidt
>>Sent: Monday, October 24, 2005 10:54 PM
>>To: [e-mail]
>>Cc: [e-mail]
>>Subject: [Acis-alliance] api_sweep_with_options() problems
>>
>>Hi,
>>
>>I am trying to run the following code snippet but pSweepResult is 
>>always
>>
>>NULL. I do api_initialize_sweeping() and so forth before. Anybody 
>>knows what else I need to take care of or which fields in 
>>sweep_options I have
>>
>>to set? Thanks for any help.
>>
>>SPAposition origin(0.0,0.0,0.0);
>>SPAposition left(0.0,10.0,0.0);
>>SPAposition right(10.0,0.0,0.0);
>>FACE *fprofile = NULL;
>>	
>>check_outcome(api_make_plface(origin, left, right, fprofile)); FACE  
>>*faces[1]; faces[0] = fprofile; BODY  *sheet = NULL; 
>>check_outcome(api_mk_by_faces(NULL,1,faces,sheet));
>>check_outcome(api_body_to_2d(sheet));
>>ENTITY_LIST face_list;
>>check_outcome(api_get_faces((ENTITY*)sheet,face_list));
>>ENTITY *profile=face_list[0];
>>sweep_options opt;
>>opt.set_draft_angle(0.349);
>>BODY* pSweepResult = 0;
>>double dist = -30.0;
>>outcome error = api_sweep_with_options(profile, dist, &opt, 
>>pSweepResult); _______________________________________________
>>Acis-alliance mailing list
>>[e-mail]
>>http://lists.cs.columbia.edu/mailman/listinfo/acis-alliance
>>
> 
> 
> _______________________________________________
> Acis-alliance mailing list
> [e-mail]
> http://lists.cs.columbia.edu/mailman/listinfo/acis-alliance
> 
> 
> 
> _______________________________________________
> Acis-alliance mailing list
> [e-mail]
> http://lists.cs.columbia.edu/mailman/listinfo/acis-alliance
> 

From schmiddie78 at gmail.com  Thu Nov  3 09:14:07 2005
From: schmiddie78 at gmail.com (Stefan Schmidt)
Date: Thu Nov  3 09:14:27 2005
Subject: [Acis-alliance] Transforming between Coord Sys
Message-ID: <[e-mail]>

Hi,

I have one coordsys1 defined by:

origin = (0,0,0) and axis (1,0,0), (0,1,0), (0,0,1)

And I have coordsys2 defined by:

origin = (0,0,0) and three different orth. axis.

How do I transform the geometry most effectively between both system in
ACIS?

So far I tried (unsuccessfully) two diff. approaches:

1) Define and set Work Coord Sys:
api_wcs_create(SPAposition(0,0,0), xpt, ypt, new_wcs);
api_wcs_set_active(new_wcs);

2) Define and apply Rotational Transform:
transf_decompose_data transfData;
transfData.rotatex = AngleXAxis;
transfData.rotatey = AngleYAxis;
transfData.rotatez = AngleZAxis;
// etc...
trans.compose(transfData,TRUE);
api_transform_entity(pSatEntity, trans);
api_change_body_trans(pSatEntity,NULL);

Does this make sense? And if so how do I find the rotation angles
(AngleXAxis,AngleYAxis, AngleZAxis) from the coordsys def above?

Any help much welcome. Thanks.

-- 
Stefan Schmidt
GiveMePower/Felix Support and Development
[phone]

From alames at sandia.gov  Thu Nov  3 10:56:05 2005
From: alames at sandia.gov (Ames, Arlo)
Date: Thu Nov  3 10:56:47 2005
Subject: [Acis-alliance] Transforming between Coord Sys
Message-ID: <[e-mail]>

I have always liked the undocumented function restore_transf to
accomplish this kind of thing.   Spatial might have a good official
answer, but I haven't found anything that takes the place of
restore_transf.  Call Spatial tech support to see what alternatives they
might have to restore_transf.

restore_transf lets you set every individual item of the transform in
fundamental terms.  Your coordinate axes, if normalized, are the
components of the matrix m that forms the rotation of the transf.  The
translation is the translation vector argument.  If you have issues with
your rotations, try transposing.

Arlo Ames
[e-mail]

-----Original Message-----
From: [e-mail]
[mailto:[e-mail]] On Behalf Of Stefan
Schmidt
Sent: Thursday, November 03, 2005 7:14 AM
To: [e-mail]
Subject: [Acis-alliance] Transforming between Coord Sys

Hi,

I have one coordsys1 defined by:

origin = (0,0,0) and axis (1,0,0), (0,1,0), (0,0,1)

And I have coordsys2 defined by:

origin = (0,0,0) and three different orth. axis.

How do I transform the geometry most effectively between both system in
ACIS?

So far I tried (unsuccessfully) two diff. approaches:

1) Define and set Work Coord Sys:
api_wcs_create(SPAposition(0,0,0), xpt, ypt, new_wcs);
api_wcs_set_active(new_wcs);

2) Define and apply Rotational Transform:
transf_decompose_data transfData;
transfData.rotatex = AngleXAxis;
transfData.rotatey = AngleYAxis;
transfData.rotatez = AngleZAxis;
// etc...
trans.compose(transfData,TRUE);
api_transform_entity(pSatEntity, trans);
api_change_body_trans(pSatEntity,NULL);

Does this make sense? And if so how do I find the rotation angles
(AngleXAxis,AngleYAxis, AngleZAxis) from the coordsys def above?

Any help much welcome. Thanks.

--
Stefan Schmidt
GiveMePower/Felix Support and Development
[phone]

_______________________________________________
Acis-alliance mailing list
[e-mail]
http://lists.cs.columbia.edu/mailman/listinfo/acis-alliance



-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.cs.columbia.edu/pipermail/acis-alliance/attachments/20051103/2ace0b27/attachment.html
From schmiddie78 at gmail.com  Thu Nov  3 11:56:19 2005
From: schmiddie78 at gmail.com (Stefan Schmidt)
Date: Thu Nov  3 11:56:44 2005
Subject: [Acis-alliance] Transforming between Coord Sys
In-Reply-To: <[e-mail]>
References: <[e-mail]>
Message-ID: <[e-mail]>

Found it, what are the three flags for???

Code:
SPAmatrix mat(xpt,ypt,normal);
SPAtransf trans = restore_transf(mat, SPAvector(0,0,0), 1.0,logical, 
logical, logical);

Ames, Arlo wrote:
> I have always liked the undocumented function restore_transf to 
> accomplish this kind of thing.   Spatial might have a good official 
> answer, but I haven't found anything that takes the place of 
> restore_transf.  Call Spatial tech support to see what alternatives they 
> might have to restore_transf.
> 
> restore_transf lets you set every individual item of the transform in