AutoEvaluationPipeline now also looks recursively for DataNameProperties in MetaProperties of its processors. Hence, it simulates ports also for nested processors. Furthermore, improved AutoEvaluationPipeline's documentation.

* Fixed VolumeExplorer not always correctly invalidating sub-processors
* Updated ProxyGeometryGenerator to new Processor design (using INVALID_PROPERTIES invalidation level)

* Moving to Apache 2.0 license
* Updated AUTHORS.txt

Work on Issue #44: Removed GLContext interface and merged functionality into GlCanvas. Introducing abstract (Qt-free) tgt::GlContextManager interface, being implemented by tgt::QtContextManager. Further clean up of related code.

Refactored DataNameProperty: Got rid of issueWrite() and connect(). Automatic invalidation of connected (shared) DataNameProperties is now delegated to AutoEvaluationPipeline.
ATTENTION: needs TBB 4.2 (not yet in repository, will be changed later)

Refactoring pipeline concept #2: Got rid of distinguishing between AbstractPipeline and VisualizationPipeline. Every AbstractPipeline is also a VisualizationPipeline. However, AbstractPipeline does not care about evaluating its components - this has to be implemented in its subclasses.
AutoEvaluationPipeline subclasses AbstractPipeline and automatically evaluates the pipeline by listening to the signals of its components and calling the corresponding process() methods.

introducing AbstractProcessor::updateProperties(DataContainer&) which is automatically called by AbstractPipeline when a processor invalidates its INVALID_PROPERTIES flag

Instead of having the LQ mode tied to the pipeline, each VisualizationProcessor has now a lqMode property effectively halfsampling the viewport size. The TrackballNavigationEventHandler was adapted to these changes and thus simplified.

Even though all integer-based properties derived from NumericProperty
used the same step value, T(1), it had to be specified when
instantiating them. To reduce boilerplate code in property
constructors, NumericProperty now uses T(1) as the default step value.

Revised event handling system: Got rid of campvis::AbstractEventHandler and replaced with functionality of tgt::EventListener and tgt::EventHandler

A new attribute has been added to all numeric properties: step value. It
determines the value of a single increment/decrement that numeric
property widgets use when their associated properties are modified using
sliders or spin boxes (users are still able to type any valid property
value in text edits).

Numerous processors and pipelines had to be updated to work with the
changed NumericProperty interface. However, choosing a well-suited step
value for each property can make it easier for users to modify the
property — using one step value for all properties leads to cases where
it is either too small, causing users to go through property values
which don't cause any visible change, or too big, making it difficult to
quickly determine the right property value.

* Introducing DataNamePropertyWidget offering a combo box with all DataHandles in current DataContainer
* added slice rendering to Columbia1 pipeline

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@516 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

* fixed transfer function shader
* let processor unlock call after execution be handled by seperate thread

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@494 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

further step to OpenGL 3.3 core compatibility in core and modules: Got rid of glPush/PopAttrib in processors, added asserts for correct OpenGL state after processor execution

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@493 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

further work on AdvancedUsFusion processor introducing pixelate mode

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@471 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@470 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

 * Pipelines evaluate themselves
 * removed the PipelineEvaluator
 * adapted all demo pipelines except OpenCLPipeline

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@462 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

* Introducing SimpleJobProcessor for dispatching non-OpenGL-related jobs

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@445 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

introduced make_job factory method for more convenient creation of jobs (less need of explicitly defining template parameters)

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@444 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

=== ATTENTION: CAMPVis does compile, but image representation conversion not yet functional again! ===

Revising ImageData concept step 2:
 * Removed all ImageDataXYZ classes
 * Introducing GenericAbstractImageRepresentation<T> and its GenericAbstractImageRepresentation<T>::ScopedRepresentation
 * Updated all processors and pipelines to use ImageRepresentationXYZ instead of ImageDataXYZ and the implicit conversion feature

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@401 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@353 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@346 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

* added AbstractPipeline::addProcessor() and VisualizationPipeline::addEventHandler() convenience methods
* some refactoring of property names

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@344 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@338 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@335 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@326 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

replaced DataHandle pointers by simple DataHandle instances - managing pointers to smart pointers is cumbersome and prone to errors...

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@318 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@278 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

 * started converting old multi-threaded OpenGL code to new job-concept
 * painter and evaluator of a VisualizationPipeline now share the same OpenGL context

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@252 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

 * introducing OpenGLJobProcessor (the name somehow sucks...)
 * renamed JobPool to PriorityPool (still needs some work)
 * AbstractPipeline::executeProcessor() now takes a pointer as argument (necessary for job pattern)

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@251 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

 * added update_legal_header.py script for updating the legal header in all code files of the project
 * ran the file => all TUMVis source files now contain the legal header

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@231 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

 * adapted SimpleRaycaster and DRRRaycaster
 * fixed TumVisApplication::deinit() using wrong OpenGL context for deinitialization

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@227 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

 * fixed ImageDataRenderTarget::bind()
 * fixed InvalidationLevel

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@224 bb408c1c-ae56-11e1-83d9-df6b3e0c105e

git-svn-id: https://camplinux.in.tum.de/svn/campvis/trunk@218 bb408c1c-ae56-11e1-83d9-df6b3e0c105e