Detailed Description

This class provides terrain intersection, ray casting, and screen picking functionality using the VRV rendering engine. It handles coordinate transformations between local and network (geocentric) coordinate systems and supports various types of intersection queries against the 3D scene.

#include <vrvIntersector.h>

Inheritance diagram for makVre::DtVrvIntersector:

[legend]

Public Member Functions
	DtVrvIntersector (makVrv::DtDe &de)

virtual	~DtVrvIntersector () override

virtual bool	elevationAt (DtVector point, double &result) override

virtual bool	terrainIntersectionAt (DtVector point, DtVector &result) override

virtual bool	getIntersection (DtVector start, DtVector end, DtVector &result, std::vector< makVrv::DtElementID > *ignoreId=0) override

virtual bool	getIntersection (DtVector start, DtTaitBryan ori, DtVector &result, std::vector< makVrv::DtElementID > *ignoreId=0) override

virtual bool	screenRayCast (float x, float y, DtVector &result) override

virtual bool	screenRayCast (float x, float y, DtVector &result, makVrv::DtElementID &id, makVrv::DtIntersector::IntersectProperties props=makVrv::DtIntersector::SupportNodes, std::vector< makVrv::DtElementID > *ignoreId=0, const std::string &window="", const std::string &channel="")

Public Member Functions inherited from makVre::DtIntersector
	DtIntersector ()

virtual	~DtIntersector ()

Protected Attributes
makVrv::DtDe &	myDe

makVrv::DtIntersector *	myIntersector

Constructor & Destructor Documentation

◆ DtVrvIntersector()

makVre::DtVrvIntersector::DtVrvIntersector ( makVrv::DtDe & de )

Constructor that initializes with a reference to the display engine.

Parameters

de	Reference to the VRV display engine

Creates a VRV intersector for the 3D model set and initializes internal state.

References de().

◆ ~DtVrvIntersector()

virtual makVre::DtVrvIntersector::~DtVrvIntersector ( )

overridevirtual

Virtual destructor to properly clean up resources.

Deletes the internal VRV intersector object.

Member Function Documentation

◆ elevationAt()

virtual bool makVre::DtVrvIntersector::elevationAt	(	DtVector	point,
		double &	result )

overridevirtual

Gets the terrain elevation at a specific point.

Parameters

point	The point in geocentric coordinates to query (only lat/lon are used)
result	The resulting elevation in meters

Returns: True if the elevation was successfully determined, false otherwise

Determines the terrain elevation at the specified geocentric point by casting a ray downward from a high altitude and finding the intersection with the terrain. The result is returned as an altitude value in meters.

Implements makVre::DtIntersector.

◆ terrainIntersectionAt()

virtual bool makVre::DtVrvIntersector::terrainIntersectionAt	(	DtVector	point,
		DtVector &	result )

overridevirtual

Gets the terrain intersection point at a specific location.

Parameters

point	The point in geocentric coordinates to query (only lat/lon are used)
result	The resulting intersection point in geocentric coordinates

Returns: True if an intersection was found, false otherwise

Casts a ray downward from a high altitude at the specified lat/lon and returns the geocentric coordinates of the intersection with the terrain.

Implements makVre::DtIntersector.

◆ getIntersection() [1/2]

virtual bool makVre::DtVrvIntersector::getIntersection	(	DtVector	start,
		DtVector	end,
		DtVector &	result,
		std::vector< makVrv::DtElementID > *	ignoreId = 0 )

overridevirtual

Gets the first intersection between two points.

Parameters

start	The starting point in geocentric coordinates
end	The ending point in geocentric coordinates
result	The resulting intersection point in geocentric coordinates
ignoreId	Optional list of element IDs to ignore during intersection testing

Returns: True if an intersection was found, false otherwise

Tests for an intersection along the line segment between start and end, returning the first intersection point encountered with pickable nodes.

Implements makVre::DtIntersector.

◆ getIntersection() [2/2]

virtual bool makVre::DtVrvIntersector::getIntersection	(	DtVector	start,
		DtTaitBryan	ori,
		DtVector &	result,
		std::vector< makVrv::DtElementID > *	ignoreId = 0 )

overridevirtual

Gets the first intersection along a ray from a point in a direction.

Parameters

start	The starting point in geocentric coordinates
ori	The orientation defining the ray direction
result	The resulting intersection point in geocentric coordinates
ignoreId	Optional list of element IDs to ignore during intersection testing

Returns: True if an intersection was found, false otherwise

Tests for an intersection along a ray defined by a start point and orientation, returning the first intersection point encountered with pickable nodes.

Implements makVre::DtIntersector.

◆ screenRayCast() [1/2]

virtual bool makVre::DtVrvIntersector::screenRayCast	(	float	x,
		float	y,
		DtVector &	result )

overridevirtual

Performs a ray cast from screen coordinates.

Parameters

x	The normalized x screen coordinate (0.0 to 1.0, left to right)
y	The normalized y screen coordinate (0.0 to 1.0, top to bottom)
result	The resulting intersection point in geocentric coordinates

Returns: True if an intersection was found, false otherwise

Projects a ray from the camera through the specified screen coordinates and returns the first intersection with pickable nodes in the scene.

Implements makVre::DtIntersector.

◆ screenRayCast() [2/2]

virtual bool makVre::DtVrvIntersector::screenRayCast	(	float	x,
		float	y,
		DtVector &	result,
		makVrv::DtElementID &	id,
		makVrv::DtIntersector::IntersectProperties	props = makVrv::DtIntersector::SupportNodes,
		std::vector< makVrv::DtElementID > *	ignoreId = 0,
		const std::string &	window = "",
		const std::string &	channel = "" )

virtual

Extended screen ray casting with additional control options.

Parameters

x	The normalized x screen coordinate (0.0 to 1.0, left to right)
y	The normalized y screen coordinate (0.0 to 1.0, top to bottom)
result	The resulting intersection point in geocentric coordinates
id	Output parameter that receives the element ID of the intersected object
props	Properties that control which types of nodes to test against
ignoreId	Optional list of element IDs to ignore during intersection testing
window	Optional window name to use for picking (defaults to current)
channel	Optional channel name to use for picking (defaults to current)

Returns: True if an intersection was found, false otherwise

Extended version of screenRayCast that provides additional control over the intersection test, including which types of nodes to test against, specific windows and channels to use, and retrieving the element ID of the intersected object.

Member Data Documentation

◆ myDe

makVrv::DtDe& makVre::DtVrvIntersector::myDe

protected

Reference to the VRV display engine.

◆ myIntersector

makVrv::DtIntersector* makVre::DtVrvIntersector::myIntersector

protected

Pointer to the internal VRV intersector implementation.

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

include/framework/vrePlayerStation/vrvIntersector.h

Detailed Description

Public Member Functions

Protected Attributes

Constructor & Destructor Documentation

◆ DtVrvIntersector()

◆ ~DtVrvIntersector()

Member Function Documentation

◆ elevationAt()

◆ terrainIntersectionAt()

◆ getIntersection() [1/2]

◆ getIntersection() [2/2]

◆ screenRayCast() [1/2]

◆ screenRayCast() [2/2]

Member Data Documentation

◆ myDe

◆ myIntersector