#include <gls_geometry_resource.h>

Inheritance diagram for GlsGeometryResource:

Classes
class	TypeDesc

Public Member Functions
virtual void	DrawSetup (VertexAttribIndexLookup *shaderProgram)=0

virtual void	DrawIndexBuffer (unsigned int bufferNumber)=0

virtual void	DrawCleanup (VertexAttribIndexLookup *shaderProgram)=0

virtual void	FreeOpenGLBuffers ()=0

virtual unsigned int	GetDataChangedCounter () const =0

virtual void	GetExtents (Vector &min, Vector &max, const GlsMatrixType *matrix=NULL)=0

virtual void	UpdateBoundingVolume ()=0

virtual bool	BoundingVolumeHit (const Vector &point, const Vector &direction)=0

virtual bool	HitTest (unsigned char pickType, const Vector &pickLinePoint, const Vector &pickLineDirection, Vector &collisionPoint)=0

virtual unsigned int	StatsIndexBufferVertexCount (unsigned int bufferNumber)=0

virtual unsigned int	StatsIndexBufferPolygonCount (unsigned int bufferNumber)=0

const TypeDesc &	Type ()

void	IncrementReference ()

void	DecrementReference ()

unsigned int	NumIndexBuffers () const

const Vector &	BoundingVolumeCenter () const

float	BoundingVolumeRadius () const

void	SetResourceId (unsigned int id)

unsigned int	GetResourceId (void)

Static Public Member Functions
static void	SetCreateInstanceMakesHalfFloat (bool value)

static GlsGeometryResource *	CreateInstance (const TypeDesc &type=GlsGeometryResource::TypeDesc())

static GlsGeometryResource *	CreateInstance (GlsResourceFileMgr::ResourceRef *resource)

Static Public Attributes
static const unsigned int	VERTEX_ATTRIBUTE_SIZE = 3 * sizeof( float )

static const unsigned int	s_invalidDataChangedCounter = 0

Protected Member Functions
virtual void	Destroy ()=0

Protected Attributes
unsigned int	_resourceID

unsigned int	_referenceCount

TypeDesc	_type

unsigned int	_numIndexBuffers

Detailed Description

The geometry resource abstract base class

Member Function Documentation

const Vector& BoundingVolumeCenter ( ) const

inline

Get the bounding sphere center

virtual bool BoundingVolumeHit	(	const Vector &	point,
		const Vector &	direction
	)

pure virtual

Determines if the given ray hits the geometry bounding volume. Note: All parameters should be in this object's coordinates.

Parameters

point	The starting point of the ray.
direction	The direction vector of the ray.

Returns: True if this bounding volume is hit by the ray.

Implemented in GlsGeometry_Generic.

float BoundingVolumeRadius ( ) const

inline

Get the bounding sphere radius

static GlsGeometryResource* CreateInstance ( const TypeDesc & type = GlsGeometryResource::TypeDesc() )

static

Construct an empty GlsGeometryResource with the given type The initial reference count is 1. Call DecrementReference to free the resource when you are done with it.

Parameters

type	A description of the initial Structure

static GlsGeometryResource* CreateInstance ( GlsResourceFileMgr::ResourceRef * resource )

static

Construct a GlsGeometryResource from a binary resource The initial reference count is 1. Call DecrementReference to free the GlsGeometryResource when you are done with it.

Parameters

resource pointer to a ResourceRef containing geometry data

void DecrementReference ( )

inline

Decrement the Reference count to this instance.

Note: The OpenGL context should be available to free resources.

virtual void Destroy ( )

protectedpure virtual

Deletes this object from the heap that it was allocated on

Implemented in GlsGeometry_Generic.

virtual void DrawCleanup ( VertexAttribIndexLookup * shaderProgram )

pure virtual

Restore the OpenGL state after rendering.

Parameters

shaderProgram Must be the same value that was passed to DrawSetup

Precondition: DrawSetup was called

Postcondition: The OpenGL state will be restored

Implemented in GlsGeometry_Generic.

virtual void DrawIndexBuffer ( unsigned int bufferNumber )

pure virtual

Draw the geometry specified by the given index buffer This method should only be called between calls to DrawSetup and DrawCleanup.

Precondition: DrawSetup has been called.

Parameters

bufferNumber Which index buffer to draw

Implemented in GlsGeometry_Generic.

virtual void DrawSetup ( VertexAttribIndexLookup * shaderProgram )

pure virtual

Setup the OpenGL state for rendering this geometry. To draw, call DrawIndexBuffer for each index buffer in the resource. After drawing, call DrawCleanup to restore the OpenGL state.

Parameters

shaderProgram interface to the shader program, used to lookup correct VertexAttrib index values (may be NULL)

Postcondition: The OpenGL state is configured for rendering from the index buffers.

Implemented in GlsGeometry_Generic.

virtual void FreeOpenGLBuffers ( )

pure virtual

Force the GlsGeometryResource to free any buffers it has allocated in the current OpenGL context.

Implemented in GlsGeometry_Generic.

virtual unsigned int GetDataChangedCounter ( ) const

pure virtual

Since calculating metrics like the extents can be an expensive operation, the user can call this function to see if the geometry resource has changed. Caching the expensive-to-calculate values is the responsibility of the caller.

Returns: The current extents ID. Never equal to s_invalidDataChangedCounter.

See also: s_invalidDataChangedCounter

Implemented in GlsGeometry_Generic.

virtual void GetExtents	(	Vector &	min,
		Vector &	max,
		const GlsMatrixType *	matrix = `NULL`
	)

pure virtual

Calculate and return the geometry extents

Parameters

min	Returns the minimum x,y,z values
max	Returns the maximum x,y,z values
matrix	(Optional) matrix to transform the vertices into the desired coordinate system

Note: This can be an expensive operation. GetDataChangedCounter() can be used to minimize this expense.

See also: GetDataChangedCounter()

Implemented in GlsGeometry_Generic.

unsigned int GetResourceId ( void )

inline

Gets the current resource ID

Precondition: _resourceID != BAD_ID

virtual bool HitTest	(	unsigned char	pickType,
		const Vector &	pickLinePoint,
		const Vector &	pickLineDirection,
		Vector &	collisionPoint
	)

pure virtual

Hit test the geometry against a picking line. All values are in geometry space.

Parameters

pickType	The type of picking (see PickableType_e), must be PICK_FIRST or PICK_BEST
pickLinePoint	A point on the pick line.
pickLineDirection	The direction of the pick line.
collisionPoint	If the method returns true, this contains the point that was hit.

Returns: true if the object was hit by the pick.

Implemented in GlsGeometry_Generic.

void IncrementReference ( )

inline

Increment the Reference count to this instance.

unsigned int NumIndexBuffers ( ) const

inline

Returns The number of index buffers in this geometry resource.

static void SetCreateInstanceMakesHalfFloat ( bool value )

static

When enabled, GlsGeometryResource::CreateInstance will instantiate GlsGeometry_HalfFloat objects when possible.

void SetResourceId ( unsigned int id )

inline

Sets a new resource ID

Parameters

id	The new ID

Precondition: id != BAD_ID

virtual unsigned int StatsIndexBufferPolygonCount ( unsigned int bufferNumber )

pure virtual

Returns polygon count for use in editor statistics

Implemented in GlsGeometry_Generic.

virtual unsigned int StatsIndexBufferVertexCount ( unsigned int bufferNumber )

pure virtual

Returns vertex count for use in editor statistics

Implemented in GlsGeometry_Generic.

const TypeDesc& Type ( )

inline

Returns the TypeDesc for this resource

virtual void UpdateBoundingVolume ( )

pure virtual

Updates the bounding volume of this object This method should be called if the vertices change for picking and culling to work correctly.

Note: This can be an expensive operation. GetDataChangedCounter() can be used to minimize this expense.

See also: GetDataChangedCounter()

Implemented in GlsGeometry_Generic.

Member Data Documentation

unsigned int _numIndexBuffers

protected

The number of index buffers in this mesh

unsigned int _referenceCount

protected

The number of Parent Objects using this object. Once the number reaches zero, the object self deletes.

unsigned int _resourceID

protected

Give this Resource a unique id so we can get it.

TypeDesc _type

protected

The TypeDesc that describes what is in this Resource

const unsigned int s_invalidDataChangedCounter = 0

static

A sentinel value for clients to initialize their counts with. GetDataChangedCounter() will never return this value.

const unsigned int VERTEX_ATTRIBUTE_SIZE = 3 * sizeof( float )

static

The sizes of various vertex attributes, in bytes.

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

gls_geometry_resource.h

Classes

Public Member Functions

Static Public Member Functions

Static Public Attributes

Protected Member Functions

Protected Attributes

Detailed Description

Member Function Documentation

Member Data Documentation