Defines a series of "patches", fixed-size groupings of vertices that must be processed by a tessellation shader. More...

#include "geomPatches.h"

Inheritance diagram for GeomPatches:

List of all members.

Public Member Functions
	GeomPatches (int num_vertices_per_patch, UsageHint usage_hint)
	The number of vertices per patch must be specified to the GeomPatches constructor, and it may not be changed during the lifetime of the GeomPatches object.
	GeomPatches (const GeomPatches &copy)
virtual bool	draw (GraphicsStateGuardianBase gsg, const GeomPrimitivePipelineReader reader, bool force) const
	Calls the appropriate method on the GSG to draw the primitive.
virtual TypeHandle	force_init_type ()
virtual int	get_num_vertices_per_primitive () const
	If the primitive type is a simple type in which all primitives have the same number of vertices, like patches, returns the number of vertices per primitive.
virtual PrimitiveType	get_primitive_type () const
	Returns the fundamental rendering type of this primitive: whether it is points, lines, or polygons.
virtual TypeHandle	get_type () const
virtual	PT (GeomPrimitive) make_copy() const
virtual void	write_datagram (BamWriter *manager, Datagram &dg)
	Writes the contents of this object to the datagram for shipping out to a Bam file.
Static Public Member Functions
static TypeHandle	get_class_type ()
static void	init_type ()
static void	register_with_read_factory ()
	Tells the BamReader how to create objects of type Geom.
Protected Member Functions
void	fillin (DatagramIterator &scan, BamReader *manager)
	This internal function is called by make_from_bam to read in all of the relevant data from the BamFile for the new GeomPatches.
Static Protected Member Functions
static TypedWritable *	make_from_bam (const FactoryParams &params)
	This function is called by the BamReader's factory when a new object of type Geom is encountered in the Bam file.
Friends
class	Geom

Detailed Description

Defines a series of "patches", fixed-size groupings of vertices that must be processed by a tessellation shader.

Definition at line 27 of file geomPatches.h.

Constructor & Destructor Documentation

GeomPatches::GeomPatches	(	int	num_vertices_per_patch,
		GeomPatches::UsageHint	usage_hint
	)

The number of vertices per patch must be specified to the GeomPatches constructor, and it may not be changed during the lifetime of the GeomPatches object.

Create a new GeomPatches if you need to have a different value.

Definition at line 34 of file geomPatches.cxx.

Referenced by make_from_bam().

Member Function Documentation

bool GeomPatches::draw	(	GraphicsStateGuardianBase *	gsg,
		const GeomPrimitivePipelineReader *	reader,
		bool	force
	)		const `[virtual]`

Calls the appropriate method on the GSG to draw the primitive.

Implements GeomPrimitive.

Definition at line 113 of file geomPatches.cxx.

void GeomPatches::fillin	(	DatagramIterator &	scan,
		BamReader *	manager
	)		`[protected, virtual]`

This internal function is called by make_from_bam to read in all of the relevant data from the BamFile for the new GeomPatches.

Reimplemented from GeomPrimitive.

Definition at line 149 of file geomPatches.cxx.

References DatagramIterator::get_uint16().

int GeomPatches::get_num_vertices_per_primitive ( ) const [virtual]

If the primitive type is a simple type in which all primitives have the same number of vertices, like patches, returns the number of vertices per primitive.

If the primitive type is a more complex type in which different primitives might have different numbers of vertices, for instance a triangle strip, returns 0.

In the case of GeomPatches, this returns the fixed number that was specified to the constructor.

Reimplemented from GeomPrimitive.

Definition at line 102 of file geomPatches.cxx.

GeomPrimitive::PrimitiveType GeomPatches::get_primitive_type ( ) const [virtual]

Returns the fundamental rendering type of this primitive: whether it is points, lines, or polygons.

This is used to set up the appropriate antialiasing settings when AntialiasAttrib::M_auto is in effect; it also implies the type of primitive that will be produced when decompose() is called.

Implements GeomPrimitive.

Definition at line 83 of file geomPatches.cxx.

TypedWritable * GeomPatches::make_from_bam ( const FactoryParams & params ) [static, protected]