helper class, random osg debug helpers and math More...

Static Public Member Functions
static void	makeRotate (osg::Quat &q, const double &angle, const double &x, const double &y, const double &z)
	Make a quaternion that rotates angle radians around (x, y, z) More...

static osg::Matrixf	toOsgRotation (const DtTaitBryan &orientation)
	tait bryan to osg matrix helper function More...

static void	quatMult (osg::Quat &lhs, const osg::Quat &rhs)
	Multiply two quaternions together. More...

static osg::Camera *	CreateTextureQuadOverlay (DtGlSimpleTexture *texture, float x, float y, float w, float h)
	adds an on screen quad for texture debugging (used by shadows and triton) More...

static osg::Camera *	CreateTextureQuadOverlay (osg::Texture *texture, float x, float y, float w, float h)
	adds an on screen quad for texture debugging (used by shadows and triton) More...

static osg::Camera *	CreateTextureQuadOverlay (const std::string &shader_root, osg::Texture2DArray *textureArray, float x, float y, float w, float h)
	adds an array of on screen quads for texture debugging (used by shadows) More...

static osg::MatrixTransform *	create_axis_primitive ()
	helper for visualizing a coordinate system More...

static osg::Matrix	getOrthoMatrix (bool useReverseZ, double left, double right, double bottom, double top, double zNear, double zFar)
	helpers for matrix and reverse z matrixes More...

static osg::Matrix	getProjMatrix (bool useReverseZ, double left, double right, double bottom, double top, double zNear, double zFar)
	Create a regular or reverse perspective projection matrix (near = 1, far = 0) out of frustum parameters. More...

static osg::Matrixd	getRevZOrthoMatrix (double left, double right, double bottom, double top, double zNear, double zFar)
	For Reverse Z buffer - get a reverse (near = 1, far = 0) orthographic matrix. More...

static bool	getRevZPerspectiveMatrixAsFrustum (const osg::Matrix &mat, double &left, double &right, double &bottom, double &top, double &zNear, double &zFar)
	For Reverse Z buffer - extract the frustum parameters out of a reverse perspective projection matrix (near = 1, far = 0) More...

static bool	getRevZOrthoMatrixAsFrustum (const osg::Matrix &orthoMat, double &left, double &right, double &bottom, double &top, double &zNear, double &zFar)
	For Reverse Z buffer - extract the frustum parameters out of a reverse orthographic matrix (near = 1, far = 0) More...

static bool	getRevZPerspective (const osg::Matrix &mat, double &fovy, double &aspectRatio, double &zNear, double &zFar)
	For Reverse Z buffer - extract the frustum parameters out of a reverse projection matrix (near = 1, far = 0) More...

static osg::Matrix	makeRevZPerspective (double fovy, double aspectRatio, double zNear, double zFar)
	For Reverse Z buffer - create a reverse projection matrix (near = 1, far = 0) out of frustum parameters. More...

static void	getYPR (const osg::Matrix &m, double &yaw, double &pitch, double &roll)
	converts a matrix to a human readable yaw/pitch/roll representation More...

static void	osgPolytopeToFrustum (Frustum_64 &frustum, const osg::Polytope &polytope, bool hasNearFar)
	gets a converts a osg polytope to a vrv friendly class. More...

static void	computeOsgCameraFrustumPlanes (std::vector< osg::Vec4d > &planes, const osg::Camera *camera)
	computes culling frustum planes from the given osg camera. More...

static void	debugDumpShaderState (osg::State *state)
	only used for debugging prints out a bunch of uniform state for the current shader. More...

static void	debugDumpUniformState (const osg::Node *node)
	only used for debugging More...

static bool	clipLine (double xMin, double xMax, double yMin, double yMax, double x0src, double y0src, double x1src, double y1src, double &x0clip, double &y0clip, double &x1clip, double &y1clip)
	2D clipping routine. Implements Liang / Barsky Clipping More...

static void	clipPolygon (double xMin, double xMax, double yMin, double yMax, std::vector< osg::Vec2 > &vertices)
	2D clipping routine. Implements Sutherland�Hodgman clipping More...

template<class VecType >
static VecType	DtModPerLoVec3 (const VecType &in, double min, double max)

static bool	insideTriangulate (const std::vector< osg::Vec2 > &contour, std::vector< int > &results)
	OSG version of DtInsideTriangulate Triangulates the given points and returns the indicies that form the triangles. More...


static osg::Vec2	rotateVec2 (const osg::Vec2 &v, double rad)
	Vec2 Helpers for DtOsgWindow classes. More...

static osg::Vec2	translateVec2 (const osg::Vec2 &v, const osg::Vec2 &translation)
	Utility function to translate a vec2. More...

static osg::Vec2	scaleVec2 (const osg::Vec2 &v, double s)
	Utility function to scale a vec2. More...

static osg::Vec2	scaleVec2 (const osg::Vec2 &v, double xScale, double yScale)
	Utility function to scale a vec2. More...

Static Protected Member Functions
static bool	snipTriangle (const std::vector< osg::Vec2 > &contour, int u, int v, int w, int n, int *V)
	Utility function used in insideTriangulate. More...

static bool	insideTriangle (float Ax, float Ay, float Bx, float By, float Cx, float Cy, float Px, float Py)
	Utility function used in insideTriangulate. More...

static float	triangulateAreaSize (const std::vector< osg::Vec2 > &contour)
	Utility function used in insideTriangulate. More...

Detailed Description

helper class, random osg debug helpers and math

Member Function Documentation

static void makVrv::DtOsgUtils::makeRotate	(	osg::Quat &	q,
		const double &	angle,
		const double &	x,
		const double &	y,
		const double &	z
	)

static

Make a quaternion that rotates angle radians around (x, y, z)

static osg::Matrixf makVrv::DtOsgUtils::toOsgRotation ( const DtTaitBryan & orientation )

static

tait bryan to osg matrix helper function

static void makVrv::DtOsgUtils::quatMult	(	osg::Quat &	lhs,
		const osg::Quat &	rhs
	)

static

Multiply two quaternions together.

This is more efficient than the OSG built in implementation

static osg::Camera* makVrv::DtOsgUtils::CreateTextureQuadOverlay	(	DtGlSimpleTexture *	texture,
		float	x,
		float	y,
		float	w,
		float	h
	)

static

adds an on screen quad for texture debugging (used by shadows and triton)

static osg::Camera* makVrv::DtOsgUtils::CreateTextureQuadOverlay	(	osg::Texture *	texture,
		float	x,
		float	y,
		float	w,
		float	h
	)

static

adds an on screen quad for texture debugging (used by shadows and triton)

static osg::Camera* makVrv::DtOsgUtils::CreateTextureQuadOverlay	(	const std::string &	shader_root,
		osg::Texture2DArray *	textureArray,
		float	x,
		float	y,
		float	w,
		float	h
	)

static

adds an array of on screen quads for texture debugging (used by shadows)

static osg::MatrixTransform* makVrv::DtOsgUtils::create_axis_primitive ( )

static

helper for visualizing a coordinate system

static osg::Matrix makVrv::DtOsgUtils::getOrthoMatrix	(	bool	useReverseZ,
		double	left,
		double	right,
		double	bottom,
		double	top,
		double	zNear,
		double	zFar
	)

static

helpers for matrix and reverse z matrixes

Create a regular or reverse orthographic projection matrix (near = 1, far = 0) out of frustum parameters

static osg::Matrix makVrv::DtOsgUtils::getProjMatrix	(	bool	useReverseZ,
		double	left,
		double	right,
		double	bottom,
		double	top,
		double	zNear,
		double	zFar
	)

static

Create a regular or reverse perspective projection matrix (near = 1, far = 0) out of frustum parameters.

static osg::Matrixd makVrv::DtOsgUtils::getRevZOrthoMatrix	(	double	left,
		double	right,
		double	bottom,
		double	top,
		double	zNear,
		double	zFar
	)

static

For Reverse Z buffer - get a reverse (near = 1, far = 0) orthographic matrix.

static bool makVrv::DtOsgUtils::getRevZPerspectiveMatrixAsFrustum	(	const osg::Matrix &	mat,
		double &	left,
		double &	right,
		double &	bottom,
		double &	top,
		double &	zNear,
		double &	zFar
	)

static

For Reverse Z buffer - extract the frustum parameters out of a reverse perspective projection matrix (near = 1, far = 0)

static bool makVrv::DtOsgUtils::getRevZOrthoMatrixAsFrustum	(	const osg::Matrix &	orthoMat,
		double &	left,
		double &	right,
		double &	bottom,
		double &	top,
		double &	zNear,
		double &	zFar
	)

static

For Reverse Z buffer - extract the frustum parameters out of a reverse orthographic matrix (near = 1, far = 0)

static bool makVrv::DtOsgUtils::getRevZPerspective	(	const osg::Matrix &	mat,
		double &	fovy,
		double &	aspectRatio,
		double &	zNear,
		double &	zFar
	)

static

For Reverse Z buffer - extract the frustum parameters out of a reverse projection matrix (near = 1, far = 0)

static osg::Matrix makVrv::DtOsgUtils::makeRevZPerspective	(	double	fovy,
		double	aspectRatio,
		double	zNear,
		double	zFar
	)

static

For Reverse Z buffer - create a reverse projection matrix (near = 1, far = 0) out of frustum parameters.

static void makVrv::DtOsgUtils::getYPR	(	const osg::Matrix &	m,
		double &	yaw,
		double &	pitch,
		double &	roll
	)

static

converts a matrix to a human readable yaw/pitch/roll representation

static void makVrv::DtOsgUtils::osgPolytopeToFrustum	(	Frustum_64 &	frustum,
		const osg::Polytope &	polytope,
		bool	hasNearFar
	)

static

gets a converts a osg polytope to a vrv friendly class.

static void makVrv::DtOsgUtils::computeOsgCameraFrustumPlanes	(	std::vector< osg::Vec4d > &	planes,
		const osg::Camera *	camera
	)

static

computes culling frustum planes from the given osg camera.

planes The computed culling planes (vector will be resized to 6). camera The camera used to compute the culling planes.

static void makVrv::DtOsgUtils::debugDumpShaderState ( osg::State * state )

static

only used for debugging prints out a bunch of uniform state for the current shader.

static void makVrv::DtOsgUtils::debugDumpUniformState ( const osg::Node * node )

static

only used for debugging

static osg::Vec2 makVrv::DtOsgUtils::rotateVec2	(	const osg::Vec2 &	v,
		double	rad
	)

static

Vec2 Helpers for DtOsgWindow classes.

Utility function to rotate a vec2

static osg::Vec2 makVrv::DtOsgUtils::translateVec2	(	const osg::Vec2 &	v,
		const osg::Vec2 &	translation
	)

static

Utility function to translate a vec2.

static osg::Vec2 makVrv::DtOsgUtils::scaleVec2	(	const osg::Vec2 &	v,
		double	s
	)

static

Utility function to scale a vec2.

static osg::Vec2 makVrv::DtOsgUtils::scaleVec2	(	const osg::Vec2 &	v,
		double	xScale,
		double	yScale
	)

static

Utility function to scale a vec2.

static bool makVrv::DtOsgUtils::clipLine	(	double	xMin,
		double	xMax,
		double	yMin,
		double	yMax,
		double	x0src,
		double	y0src,
		double	x1src,
		double	y1src,
		double &	x0clip,
		double &	y0clip,
		double &	x1clip,
		double &	y1clip
	)

static

2D clipping routine. Implements Liang / Barsky Clipping

static void makVrv::DtOsgUtils::clipPolygon	(	double	xMin,
		double	xMax,
		double	yMin,
		double	yMax,
		std::vector< osg::Vec2 > &	vertices
	)

static

2D clipping routine. Implements Sutherland�Hodgman clipping

template<class VecType >

static VecType makVrv::DtOsgUtils::DtModPerLoVec3	(	const VecType &	in,
		double	min,
		double	max
	)

inlinestatic

static bool makVrv::DtOsgUtils::insideTriangulate	(	const std::vector< osg::Vec2 > &	contour,
		std::vector< int > &	results
	)

static

OSG version of DtInsideTriangulate Triangulates the given points and returns the indicies that form the triangles.

The triangles will be constrained to the inside of the polygon being triangulated. Note that if this polygon has crossing lines it will not be triangulated. This is also only a 2D triangulation routine. The Z value is ignored, however it can be passed in. Rearranges contour into results;

static bool makVrv::DtOsgUtils::snipTriangle	(	const std::vector< osg::Vec2 > &	contour,
		int	u,
		int	v,
		int	w,
		int	n,
		int *	V
	)

staticprotected

Utility function used in insideTriangulate.

static bool makVrv::DtOsgUtils::insideTriangle	(	float	Ax,
		float	Ay,
		float	Bx,
		float	By,
		float	Cx,
		float	Cy,
		float	Px,
		float	Py
	)

staticprotected

Utility function used in insideTriangulate.

static float makVrv::DtOsgUtils::triangulateAreaSize ( const std::vector< osg::Vec2 > & contour )

staticprotected

Utility function used in insideTriangulate.

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

/data/exports/nrhent7-1/nightly/docs/vrForces.vrf4-10-branch/include/vrvOsg/DtOsgUtils.h

Static Public Member Functions

Static Protected Member Functions

Detailed Description

Member Function Documentation