VRS::MultiSceneRenderer Class Reference
Abstract class to do the complete scene graph evaluation several times. More...
#include <vrs/sg/multiscenerenderer.h>
Public Member Functions | |
| virtual void | start (Engine *)=0 |
| Starts frame rendering with (possibly) several scene graph evaluations. | |
| virtual void | stop (Engine *)=0 |
| Stops frame rendering. | |
| virtual bool | needSceneEvaluation (Engine *)=0 |
| Returns whether evaluating the scene graph is required. | |
| virtual void | preEvaluateScene (Engine *)=0 |
| pre evaluation hook which is invoked before the scene graph is evaluated | |
| virtual void | postEvaluateScene (Engine *)=0 |
| post evaluation hook which is invoked after the scene graph is evaluated | |
| virtual void | evaluateScene (SceneThing *, Engine *, TechniqueProcessor *) |
| Evaluates the scene graph, calling evaluateOnce() several times. | |
| virtual void | evaluateOnce (SceneThing *, Engine *, TechniqueProcessor *) |
| Starts the evaluation algorithm for the scene node. | |
| VRS_TYPEINFO (MultiSceneRenderer, SharedObj) | |
Detailed Description
Abstract class to do the complete scene graph evaluation several times.Abstract class provides an interface for doing all algorithms to evaluate the scene graph several times. The MultiSceneRenderer is orthogonal to the TechniqueProcessor and Technique objects, i.E., it starts and stops the TechniqueProcessor several times for each scene graph evaluation.
The MultiSceneRenderer is, for example, useful to implement Stereo-Viewing (rendering the scene twice from different camera positions is required) or for large scale snapshots. Only one MultiSceneRenderer can be used simultaneously to render a scene. In order to set the MultiSceneRenderer, use the setSceneRenderer() method of the Canvas.
Member Function Documentation
| virtual void VRS::MultiSceneRenderer::start | ( | Engine * | ) | [pure virtual] |
Starts frame rendering with (possibly) several scene graph evaluations.
Implemented in VRS::DepthOfFieldRendererGL, VRS::StereoRendererGL, and VRS::StandardRenderer.
| virtual void VRS::MultiSceneRenderer::stop | ( | Engine * | ) | [pure virtual] |
Stops frame rendering.
Implemented in VRS::DepthOfFieldRendererGL, VRS::StereoRendererGL, and VRS::StandardRenderer.
| virtual bool VRS::MultiSceneRenderer::needSceneEvaluation | ( | Engine * | ) | [pure virtual] |
Returns whether evaluating the scene graph is required.
Implemented in VRS::DepthOfFieldRendererGL, VRS::StereoRendererGL, and VRS::StandardRenderer.
| virtual void VRS::MultiSceneRenderer::preEvaluateScene | ( | Engine * | ) | [pure virtual] |
pre evaluation hook which is invoked before the scene graph is evaluated
Implemented in VRS::DepthOfFieldRendererGL, VRS::StereoRendererGL, and VRS::StandardRenderer.
| virtual void VRS::MultiSceneRenderer::postEvaluateScene | ( | Engine * | ) | [pure virtual] |
post evaluation hook which is invoked after the scene graph is evaluated
Implemented in VRS::DepthOfFieldRendererGL, VRS::GrayScaleRendererGL, VRS::StereoRendererGL, and VRS::StandardRenderer.
| virtual void VRS::MultiSceneRenderer::evaluateScene | ( | SceneThing * | , | |
| Engine * | , | |||
| TechniqueProcessor * | ||||
| ) | [virtual] |
Evaluates the scene graph, calling evaluateOnce() several times.
Implements the frame rendering algorithm that invokes the above abstract methods in order to render the frame. Basically, first start() is called. Then, as long as needSceneEvaluation() indicates that invoking the scene graph evaluation is required, the pre evaluation hook, evaluateOnce(), and the post evaluation hook is called. Finally, stop() is called.
| virtual void VRS::MultiSceneRenderer::evaluateOnce | ( | SceneThing * | , | |
| Engine * | , | |||
| TechniqueProcessor * | ||||
| ) | [virtual] |
Starts the evaluation algorithm for the scene node.
This method is invoked for evaluating the scene root node. The scene graph is traversed as often as dictated by the technique processor object.
| VRS::MultiSceneRenderer::VRS_TYPEINFO | ( | MultiSceneRenderer | , | |
| SharedObj | ||||
| ) |
The documentation for this class was generated from the following file: