AppDemoSceneVideoTrackChessboard Class Reference

Class for video for chessboard test scene. More...

#include <AppDemoSceneVideoTrackChessboard.h>

Inheritance diagram for AppDemoSceneVideoTrackChessboard:

Public Member Functions
	AppDemoSceneVideoTrackChessboard (SLSceneID sid)
void	registerAssetsToLoad (SLAssetLoader &al) override
	All scene specific assets have to be registered for async loading in here. More...
void	assemble (SLAssetManager *am, SLSceneView *sv) override
	After parallel loading of the assets the scene gets assembled in here. More...
Public Member Functions inherited from SLScene
	SLScene (const SLstring &name)
	~SLScene () override
void	initOculus (SLstring shaderDir)
void	root3D (SLNode *root3D)
void	root2D (SLNode *root2D)
void	skybox (SLSkybox *skybox)
void	stopAnimations (SLbool stop)
void	info (SLstring i)
void	loadTimeMS (SLfloat loadTimeMS)
SLAnimManager &	animManager ()
SLAssetManager *	assetManager ()
SLNode *	root3D ()
SLNode *	root2D ()
SLSkybox *	skybox ()
SLstring &	info ()
SLfloat	elapsedTimeMS () const
SLfloat	elapsedTimeSec () const
SLVEventHandler &	eventHandlers ()
SLfloat	loadTimeMS () const
SLVLight &	lights ()
SLfloat	fps () const
AvgFloat &	frameTimesMS ()
AvgFloat &	updateTimesMS ()
AvgFloat &	updateAnimTimesMS ()
AvgFloat &	updateAABBTimesMS ()
AvgFloat &	updateDODTimesMS ()
SLNode *	singleNodeSelected ()
	Returns the node if only one is selected. See also SLMesh::selectNodeMesh. More...
SLMesh *	singleMeshFullSelected ()
	Returns the node if only one is selected. See also SLMesh::selectNodeMesh. More...
SLVNode &	selectedNodes ()
SLVMesh &	selectedMeshes ()
SLbool	stopAnimations () const
SLint	numSceneCameras ()
	Returns the number of camera nodes in the scene. More...
SLCamera *	nextCameraInScene (SLCamera *activeSVCam)
	Returns the next camera in the scene if there is one. More...
bool	onUpdate (bool renderTypeIsRT, bool voxelsAreShown, bool forceCPUSkinning)
	Updates animations and AABBs. More...
void	init (SLAssetManager *am)
virtual void	unInit ()
void	selectNodeMesh (SLNode *nodeToSelect, SLMesh *meshToSelect)
	Handles the full mesh selection from double-clicks. More...
void	deselectAllNodesAndMeshes ()
	Deselects all nodes and its meshes. More...
SLGLOculus *	oculus ()
Public Member Functions inherited from SLObject
	SLObject (const SLstring &Name="", const SLstring &url="")
virtual	~SLObject ()
void	name (const SLstring &Name)
void	url (const SLstring &url)
const SLstring &	name () const
const SLstring &	url () const

Private Attributes
SLSceneID	_sceneID

Additional Inherited Members
Protected Attributes inherited from SLScene
SLVLight	_lights
	Vector of all lights. More...
SLVEventHandler	_eventHandlers
	Vector of all event handler. More...
SLAnimManager	_animManager
	Animation manager instance. More...
SLAssetManager *	_assetManager
	Pointer to the external assetManager. More...
SLNode *	_root3D
	Root node for 3D scene. More...
SLNode *	_root2D
	Root node for 2D scene displayed in ortho projection. More...
SLSkybox *	_skybox
	pointer to skybox More...
SLstring	_info
	scene info string More...
SLVNode	_selectedNodes
	Vector of selected nodes. See SLMesh::selectNodeMesh. More...
SLVMesh	_selectedMeshes
	Vector of selected meshes. See SLMesh::selectNodeMesh. More...
SLfloat	_loadTimeMS
	time to load scene in ms More...
SLfloat	_frameTimeMS
	Last frame time in ms. More...
SLfloat	_lastUpdateTimeMS
	Last time after update in ms. More...
SLfloat	_fps
	Averaged no. of frames per second. More...
AvgFloat	_frameTimesMS
	Averaged total time per frame in ms. More...
AvgFloat	_updateTimesMS
	Averaged time for update in ms. More...
AvgFloat	_updateAABBTimesMS
	Averaged time for update the nodes AABB in ms. More...
AvgFloat	_updateAnimTimesMS
	Averaged time for update the animations in ms. More...
AvgFloat	_updateDODTimesMS
	Averaged time for update the SLEntities graph. More...
SLbool	_stopAnimations
	Global flag for stopping all animations. More...
std::unique_ptr< SLGLOculus >	_oculus
	Oculus Rift interface. More...
Protected Attributes inherited from SLObject
SLstring	_name
	name of an object More...
SLstring	_url
	uniform resource locator More...

Detailed Description

Class for video for chessboard test scene.

Definition at line 20 of file AppDemoSceneVideoTrackChessboard.h.

Constructor & Destructor Documentation

AppDemoSceneVideoTrackChessboard()

AppDemoSceneVideoTrackChessboard::AppDemoSceneVideoTrackChessboard

(

SLSceneID

sid

)

Definition at line 30 of file AppDemoSceneVideoTrackChessboard.cpp.

  : SLScene("Chessboard Video"),
    _sceneID(sid)
{
    switch (_sceneID)
    {
        case SID_VideoTrackChessMain: name("Track Chessboard (main cam.)"); break;
        case SID_VideoTrackChessScnd: name("Track Chessboard (scnd.cam.)"); break;
        case SID_VideoCalibrateMain: name("Calibrate Main Camera"); break;
        case SID_VideoCalibrateScnd: name("Calibrate Scnd. Camera"); break;
        default: name("Unknow SceneID");
    }
}

Member Function Documentation

assemble()

void AppDemoSceneVideoTrackChessboard::assemble ( SLAssetManager *  am, SLSceneView *  sv  )

overridevirtual

After parallel loading of the assets the scene gets assembled in here.

Remarks

All scene-specific assets have to be loaded async by overriding SLScene::registerAssetsToLoad and SLScene::assemble. Async loading and assembling means that it happens in a parallel thread and that in there are no OpenGL calls allowed. OpenGL calls are only allowed in the main thread. It is important that all object instantiations within SLScene::assemble do NOT call any OpenGL functions (gl*) because they happen in a parallel thread. All objects that get rendered have to do their initialization when they are used the first time during rendering in the main thread.

Reimplemented from SLScene.

Definition at line 62 of file AppDemoSceneVideoTrackChessboard.cpp.

{
    /*
    The tracking of markers is done in AppDemoVideo::onUpdateTracking by
    calling the specific CVTracked::track method. If a marker was found it
    overwrites the linked nodes object matrix (SLNode::_om).
    If the linked node is the active camera the found transform is additionally
    inversed. This would be the standard augmented realty use case.
    The chessboard marker used in these scenes is also used for the camera
    calibration. The different calibration state changes are also handled in
    AppDemoVideo::onUpdateVideo.
    */
    // Setup here only the requested scene.
    if (_sceneID == SID_VideoTrackChessMain ||
        _sceneID == SID_VideoTrackChessScnd)
    {
        if (_sceneID == SID_VideoTrackChessMain)
            CVCapture::instance()->videoType(VT_MAIN);
        else
            CVCapture::instance()->videoType(VT_SCND);
    }
    else if (_sceneID == SID_VideoCalibrateMain)
    {
        if (AppCommon::calibrationEstimator)
        {
            delete AppCommon::calibrationEstimator;
            AppCommon::calibrationEstimator = nullptr;
        }
        CVCapture::instance()->videoType(VT_MAIN);
    }
    else if (_sceneID == SID_VideoCalibrateScnd)
    {
        if (AppCommon::calibrationEstimator)
        {
            delete AppCommon::calibrationEstimator;
            AppCommon::calibrationEstimator = nullptr;
        }
        CVCapture::instance()->videoType(VT_SCND);
    }
 
    // Material
    SLMaterial* yellow = new SLMaterial(am,
                                        "mY",
                                        SLCol4f(1, 1, 0, 0.5f));
 
    // set the edge length of a chessboard square
    SLfloat e1 = 0.028f;
    SLfloat e3 = e1 * 3.0f;
    SLfloat e9 = e3 * 3.0f;
 
    // Create a scene group node
    SLNode* scene = new SLNode("scene node");
 
    // Create a camera node
    SLCamera* cam1 = new SLCamera();
    cam1->name("camera node");
    cam1->translation(0, 0, 5);
    cam1->lookAt(0, 0, 0);
    cam1->focalDist(5);
    cam1->clipFar(10);
    cam1->fov(CVCapture::instance()->activeCamera->calibration.cameraFovVDeg());
    cam1->background().texture(gVideoTexture);
    cam1->setInitialState();
    cam1->devRotLoc(&AppCommon::devRot, &AppCommon::devLoc);
    scene->addChild(cam1);
 
    // Create a light source node
    SLLightSpot* light1 = new SLLightSpot(am, this, e1 * 0.5f);
    light1->translate(e9, e9, e9);
    light1->name("light node");
    scene->addChild(light1);
 
    // Build mesh & node
    if (_sceneID == SID_VideoTrackChessMain ||
        _sceneID == SID_VideoTrackChessScnd)
    {
        SLBox*  box     = new SLBox(am,
                               0.0f,
                               0.0f,
                               0.0f,
                               e3,
                               e3,
                               e3,
                               "Box",
                               yellow);
        SLNode* boxNode = new SLNode(box,
                                     "Box Node");
        boxNode->setDrawBitsRec(SL_DB_CULLOFF, true);
        SLNode* axisNode = new SLNode(new SLCoordAxis(am),
                                      "Axis Node");
        axisNode->setDrawBitsRec(SL_DB_MESHWIRED, false);
        axisNode->scale(e3);
        boxNode->addChild(axisNode);
        scene->addChild(boxNode);
    }
 
    // The tracker moves the camera node
    gVideoTrackedNode = cam1;
 
    // pass the scene group as root node
    root3D(scene);
 
    // Set active camera
    sv->camera(cam1);
    sv->doWaitOnIdle(false);
}

registerAssetsToLoad()

void AppDemoSceneVideoTrackChessboard::registerAssetsToLoad ( SLAssetLoader &  al )

overridevirtual

All scene specific assets have to be registered for async loading in here.

All assets the should be loaded in parallel must be registered in here.

Remarks

All scene sspecific assets have to be loaded async by overriding SLScene::registerAssetsToLoad and SLScene::assemble. Async loading and assembling means that it happens in a parallel thread and that in there are no OpenGL calls allowed. OpenGL calls are only allowed in the main thread.

Reimplemented from SLScene.

Definition at line 45 of file AppDemoSceneVideoTrackChessboard.cpp.

{
    // Create video texture on global pointer updated in AppDemoVideo
    al.addTextureToLoad(gVideoTexture,
                        AppCommon::texturePath +
                          "LiveVideoError.png",
                        GL_LINEAR,
                        GL_LINEAR);
 
    // Create a chessboard tracker
    al.addLoadTask([]()
                   {
        gVideoTracker = new CVTrackedChessboard(AppCommon::calibIniPath);
        gVideoTracker->drawDetection(true); });
}

Member Data Documentation

_sceneID

SLSceneID AppDemoSceneVideoTrackChessboard::_sceneID

private

Definition at line 45 of file AppDemoSceneVideoTrackChessboard.h.

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The documentation for this class was generated from the following files:

• AppDemoSceneVideoTrackChessboard.h
• AppDemoSceneVideoTrackChessboard.cpp