osgText::Text and osgText::Text3D use the same font file.
The first really load the file and obtain an osgText::Font object,
the second use the cache created during the first load of the
font file, and so obtain an osgText::Font object instead of
osgText::Font3D object. To obtain an osgText::Font3D object,
osgText::Text3D call osgDB::readObjectFile(...) with an option
to specify the plugin we want an osgText::Font3D instead of
osgText::Font.
Generalised Problem:
In osgDB::Registry, loaded file cache is referenced by the name
of this file, so if I load a file with some options, and the cache
already contain object for this filename, I obtain an object
potentially not loaded with my options.
Behaviours:
Cache management is delegate to osgDB::Registry, but cache
coherence (load a file with option then reuse it, deactivate the
cache when load a specific file or don't cached the loaded file)
is user's responsibility.
Text3D solution:
Postfix the font file name by .text3d or something similar and then have the freetype plugin return
osgText::Font3D when it detects this.
This operation is done by osgText::readFont3DFile() which unsure the filename have .text3d as extension.
This is totaly transparent for user, and backward compatible.
BTW, I fix the bug about the Normal of 3D text. Currently, the front and wall face have
the same normal (0,0,1) in the Text3D object coordinate. Now the wall face have its own
normal array computed by the plugin.
BTW 2, I implement
- void Text3D::accept(osg::Drawable::ConstAttributeFunctor& af) const
- void Text3D::accept(osg::PrimitiveFunctor& pf) const
so now statistics are well reported.
"
attached code adds this, along with a member variable to keep track of
the setting. It is based on the latest subversion version, and was
tested by creating a new text object with the same axis alignment as an
existing one (e.g.
new_text->setAxisAlignment(old_text->getAxisAlignment()); )."
From Robert Osfield, " I originally didn't add a getAxisAlignment()
as all setAxisAlignment does is set the Rotation member variable, and
potentially one could apply user defined Rotation setting after the
setAxisAlignment() which would bring it out of sync with the
setAxisAlignment.
Rather than reject your submission on the ground of potentially
getting out of sync and therefore misleading users I've added a
USED_DEFINED_ROTATION to AxisAlignment enum, and set this in the
serRotation and then override this setting of _axisAlignment in the
setAxisAlingment method. I've also removed the lazy updating
optimization you've added to the top of setAxisAlignment to avoid
potential problems as well."
on the screen, it looks more aesthetically pleasing to have a larger
gap between lines than is given by default. I added a new parameter,
lineSpacing, in the Text class to allow the line spacing to be adjustable
by the application. The default value is 0 meaning there is no extra
spacing given. The value should be given as a percentage of the character
height. A good value for longer paragraphs is 0.25 (25%) or more."
handle scenes with multiple views with elements that need coordinating on a per view basis.
Added beginings of new osgText::FadeText class (not functionality yet).
that users can assign to it without it being overriden. If none is
assigned externally it now uses a StateSet associated wit the Font assigned
to the Text.
readFontStream() to load fonts from a std::istream, rather than from the
local filesystem by name. Such a call may be used, for example, if the
user has a font fetched over a network, or a font available in memory
without a correspondng filename.
The changes implement the new function by following the corresponding code
for readFontFile(). readFontStream() reads a stream into memory, and
holds that memory for FreeType.
As a basic test, I mangled the osgtext example to use
readFontStream(std::ifstream("font")) in lieu of a readFontFile call, and
the modified example ran completely."
