Menu
▾
▴
Re: [Visualpython-users] Keeping labels in one place
|
From: Robert F. <rf...@rf...> - 2010-07-19 17:44:19
|
Brilliant! I should've figured that one out myself. Thanks, it will handle my needs for now. Also thanks to Symion for a different approach, which I have also learned a lot from. Rob On Sun, 18 Jul 2010 01:08:02 -0700 (PDT), Kadir Haldenbilen <kha...@ya...> wrote: > I am not sure if I have misunderstood your requirement with > oversimplification, > or if this helps: > > LABEL object itself should provide what you want. > > If you place the label at pos = scene.center, then mouse operations > (zoom, > rotate, etc.) will not affect the label position. It will stay at the > center of > the screen. > > You may not wish to have the label at the center, as you may prefer to > have > your prime object at the center. Then, you can use xoffset, yoffset > parameters > to shift the label on the screen which are in pixel coordinates, not in > space > coordinates. > > So, pos = scene.center and the use of xoffset and yoffset serves as > positioning > the label on the screen with absolute pixel coordinates. > > For example, you can try the following simple code: > > # ============== > from visual import * > > scene.center = (1,2,3) > > plane = pyramid(pos=(1,1,1), size=(2,1,3)) > > tlabel = label(pos=scene.center, xoffset=0, yoffset=-100, line=0, > text="TIME") > slabel = label(pos=scene.center, xoffset=100, yoffset=-100, line=0, > text="SPEED") > glabel = label(pos=scene.center, xoffset=-100, yoffset=-100, line=0, > text="GFORCE") > > t = 0 > while 1: > > plane.pos -= (plane.pos.x, plane.pos.y, t) > t += 0.001 > plane.rotate(axis=(0,0,1), angle=pi/64) > rate(25) > > > > Was this what you needed? > > Kadir > > > ________________________________ > From: Robert French <rf...@rf...> > To: C Anthony Risinger <an...@ex...> > Cc: "vis...@li..." > <vis...@li...> > Sent: Sun, July 18, 2010 2:09:21 AM > Subject: Re: [Visualpython-users] Keeping labels in one place > > Yes, C Anthony is correct. I want it to stay at an absolute pixel > coordinate > (2-D) in the window. Completely unaffected by any rotations or zooms. > The > existing objects all move with the frame. > > > I had thought about the constantly-reposition option but was hoping there > was > something easier. This seems like it would be a common desire. For > example, to > put a title or timestamp or something in the display window. > > I'll try those suggestions and see if I can get it to work > > BTW, my application is orbit visualization of spacecraft. I just want the > date > and time to stay in one place. > > Thanks. > > On Jul 17, 2010, at 11:20 AM, C Anthony Risinger <an...@ex...> wrote: > >> >> >> On Sat, Jul 17, 2010 at 1:07 PM, Bruce Sherwood <bas...@nc...> >> wrote: >>> The current version of VPython (5.32) offers a text object as well as a >>> label object. The label object always faces the viewer, independent of >>> rotation, whereas the (new) text object is extruded text that behaves >>> like >>> all other objects. Seems like one of these two should do what you >>> want. The >>> text object can have zero thickness. >>> I'm not sure what you mean by a "time" display, but presumably you know >>> about the graphing option. >>> Bruce Sherwood >> >> i think what the OP is looking for is HUD functionality, ie. the >> "time" display stays locked to the viewport, regardless of zoom or >> rotation. >> >> AFIAK this is not currently supported in vpython. however, the same >> effect can be achieved by using a "HUD frame" and constantly >> recomputing it's position/zoom/rotation as the main frame moves. the >> other option is to put your app into a "container" frame, and ensure >> the main frame never moves... anything added to the main frame is a >> part of the HUD; i think the issue with this was mouse grabs are sent >> to the main frame (IIRC). sorry, i don't have any code examples on >> hand :-( >> >> C Anthony >> >> > ------------------------------------------------------------------------------ >> This SF.net email is sponsored by Sprint >> What will you do first with EVO, the first 4G phone? >> Visit sprint.com/first-- http://p.sf.net/sfu/sprint-com-first >> _______________________________________________ >> Visualpython-users mailing list >> Vis...@li... >> https://lists.sourceforge.net/lists/listinfo/visualpython-users >> >> >> -- >> Limited filtering has been provided due to external email forwarding. >> For details please review: >> http://www.onlymyemail.com/faqs/forwarding.html >> > > ------------------------------------------------------------------------------ > This SF.net email is sponsored by Sprint > What will you do first with EVO, the first 4G phone? > Visit sprint.com/first -- http://p.sf.net/sfu/sprint-com-first > _______________________________________________ > Visualpython-users mailing list > Vis...@li... > https://lists.sourceforge.net/lists/listinfo/visualpython-users > > > > > > > -- > Limited filtering has been provided due to external email forwarding. > For details please review: http://www.onlymyemail.com/faqs/forwarding.html |
