Wrapper for the OpenGL function glDrawElements(). More...

#include <DrawElements.hpp>

Inheritance diagram for vl::DrawElements< arr_type >:

Public Types
typedef arr_type::scalar_type	index_type

Public Member Functions
virtual unsigned int	primitiveRestartIndex ()
	Returns the primitive restart index used by the draw call or 0 if primitive restart is not supported. More...

	DrawElements (EPrimitiveType primitive=PT_TRIANGLES, int instances=1)
	Constructor. More...

DrawElements &	operator= (const DrawElements &other)
	Assign operator. More...

virtual ref< DrawCall >	clone () const
	Returns a clone of this DrawCall. More...

void	setCount (i32 count)
	The number of indices to render, default is -1 which means 'till the end of the indexBuffer() from offset()'. More...

i32	count () const
	The number of indices to render, default is -1 which means 'till the end of the indexBuffer() from offset()'. More...

void	setOffset (u32 offset)
	The offset in bytes from which the index buffer will be read. More...

u32	offset () const
	The offset in bytes from which the index buffer will be read. More...

void	setIndexBuffer (arr_type *index_buffer)
	The BufferObject containing the indices used to render. More...

arr_type *	indexBuffer ()
	The BufferObject containing the indices used to render. More...

const arr_type *	indexBuffer () const
	The BufferObject containing the indices used to render. More...

virtual void	updateDirtyBufferObject (EBufferObjectUpdateMode mode)
	Updates the index buffer's BufferObject if marked as dirty. More...

virtual void	deleteBufferObject ()
	Deletes the index buffer's BufferObject. More...

virtual void	render (bool use_bo) const
	Executes the draw call. More...

TriangleIterator	triangleIterator () const
	Returns a TriangleIterator used to iterate through the triangles of a DrawCall. More...

IndexIterator	indexIterator () const
	Returns a IndexIterator used to iterate through the virtual indices of a DrawCall. More...

Public Member Functions inherited from vl::DrawElementsBase
virtual bool	primitiveRestartEnabled () const
	Returns whether the primitive-restart functionality is enabled or not (requires OpenGL 3.1). More...

void	setPrimitiveRestartEnabled (bool enabled)
	Enables the primitive-restart functionality (requires OpenGL 3.1). More...

void	setInstances (int instances)
	Sets the number of instances for this set of primitives. More...

int	instances () const
	Returns the number of instances for this set of primitives. More...

void	setBaseVertex (int base_vertex)
	If base_vertx is != 0 glDrawElementsBaseVertex/glDrawElementsInstancedBaseVertex will be used instead of their non *BaseVertx counterparts. More...

int	baseVertex () const
	Returns the currently used base vertex. More...

Public Member Functions inherited from vl::DrawCall
	DrawCall ()
	Constructor. More...

DrawCall &	operator= (const DrawCall &other)
	Assignment operator. More...

void	setPrimitiveType (EPrimitiveType type)
	Sets the draw call's primitive type. More...

EPrimitiveType	primitiveType () const
	Returns the draw call's primitive type. More...

void	setEnabled (bool enable)
	Enables/disables the draw call. More...

bool	isEnabled () const
	True if the draw call is enabled. More...

u32	countIndices () const
	Counts the number of virtual indices of a DrawCall., i.e. More...

u32	countTriangles () const
	Counts the number of virtual triangles of a DrawCall., i.e. More...

void	setPatchParameter (PatchParameter *patch_param)
	Attach a PatchParameter to a DrawCall to be used when using primitive-type PT_PATCHES. More...

PatchParameter *	patchParameter ()
	The PatchParameter attached to a DrawCall to be used when using primitive-type PT_PATCHES. More...

const PatchParameter *	patchParameter () const
	The PatchParameter attached to a DrawCall to be used when using primitive-type PT_PATCHES. More...

Public Member Functions inherited from vl::Object
	Object ()
	Constructor. More...

	Object (const Object &other)
	Copy constructor: copies the name, ref count mutex and user data. More...

Object &	operator= (const Object &other)
	Copy operator: copies the object's name, ref count mutex and user data. More...

const std::string &	objectName () const
	The name of the object, by default set to the object's class name. More...

void	setObjectName (const char *name)
	The name of the object, by default set to the object's class name in debug builds. More...

void	setObjectName (const std::string &name)
	The name of the object, by default set to the object's class name in debug builds. More...

void	setRefCountMutex (IMutex *mutex)
	The mutex used to protect the reference counting of an Object across multiple threads. More...

IMutex *	refCountMutex ()
	The mutex used to protect the reference counting of an Object across multiple threads. More...

const IMutex *	refCountMutex () const
	The mutex used to protect the reference counting of an Object across multiple threads. More...

int	referenceCount () const
	Returns the number of references of an object. More...

void	incReference () const
	Increments the reference count of an object. More...

void	decReference ()
	Decrements the reference count of an object and deletes it if both automaticDelete() is `true` the count reaches 0. More...

void	setAutomaticDelete (bool autodel_on)
	If set to true the Object is deleted when its reference count reaches 0. More...

bool	automaticDelete () const
	If set to true the Object is deleted when its reference count reaches 0. More...

template<class T >
T *	as ()
	Casts an Object to the specified class. More...

template<class T >
const T *	as () const
	Casts an Object to the specified class. More...

Static Public Attributes
static const index_type	primitive_restart_index = index_type(~0)
	The special index which identifies a primitive restart. By default it is set to ~0 that is 0xFF, 0xFFFF, 0xFFFFFFFF respectively for GLubyte, GLushort, GLuint index types. */. More...

Protected Attributes
ref< arr_type >	mIndexBuffer

i32	mCount

u32	mOffset

Protected Attributes inherited from vl::DrawElementsBase
int	mInstances

bool	mPrimitiveRestartEnabled

GLuint	mBaseVertex

Protected Attributes inherited from vl::DrawCall
ref< PatchParameter >	mPatchParameter

EPrimitiveType	mType

bool	mEnabled

Protected Attributes inherited from vl::Object
std::string	mObjectName

IMutex *	mRefCountMutex

int	mReferenceCount

bool	mAutomaticDelete

Additional Inherited Members
Protected Member Functions inherited from vl::DrawCall
void	applyPatchParameters () const

Protected Member Functions inherited from vl::Object
virtual	~Object ()

Detailed Description

template<class arr_type>
class vl::DrawElements< arr_type >

Wrapper for the OpenGL function glDrawElements().

See vl::DrawCall for an overview of the different draw call methods.

This class wraps the following OpenGL functions:

glDrawElements (http://www.opengl.org/sdk/docs/man4/xhtml/glDrawElements.xml)
glDrawElementsInstanced (http://www.opengl.org/sdk/docs/man4/xhtml/glDrawElementsInstanced.xml)
glDrawElementsBaseVertex (http://www.opengl.org/sdk/docs/man4/xhtml/glDrawElementsBaseVertex.xml)
glDrawElementsInstancedBaseVertex (http://www.opengl.org/sdk/docs/man4/xhtml/glDrawElementsInstancedBaseVertex.xml)

Supports:

Multi instancing: YES
Base vertex: YES
Primitive restart: YES

Use the functions setInstances() and instances() to use the Multi instancing functionality. (requires OpenGL 3.1). For more information see http://www.opengl.org/sdk/docs/man3/xhtml/glDrawElementsInstanced.xml

Use the functions setPrimitiveRestartIndex() and setPrimitiveRestartEnabled() to use the primitive restart functionality (requires OpenGL 3.1). For more information see http://www.opengl.org/sdk/docs/man3/xhtml/glPrimitiveRestartIndex.xml

Use the function setBaseVertex() with a non zero argument to use the base vertex functionality. Requires OpenGL 3.2 or GL_ARB_draw_elements_base_vertex. For more information see http://www.opengl.org/sdk/docs/man3/xhtml/glDrawElementsBaseVertex.xml

DrawElements, MultiDrawElements, DrawRangeElements, DrawArrays are used by Geometry to define a set of primitives to be rendered, see Geometry::drawCalls(). The indices are stored in a BufferObject and thus they can be stored locally or on the GPU. To gain direct access to the BufferObject use the indexBuffer() function.

DrawArrays, DrawElements, MultiDrawElements and DrawRangeElements are used by Geometry to define a set of primitives to be rendered.

See also: Geometry::drawCalls(), DrawCall, DrawElements, MultiDrawElements, DrawRangeElements, Geometry, Actor

Definition at line 118 of file DrawElements.hpp.

Member Typedef Documentation

◆ index_type

template<class arr_type>

typedef arr_type::scalar_type vl::DrawElements< arr_type >::index_type

Definition at line 123 of file DrawElements.hpp.

Constructor & Destructor Documentation

◆ DrawElements()

template<class arr_type>

vl::DrawElements< arr_type >::DrawElements	(	EPrimitiveType	primitive = `PT_TRIANGLES`,
		int	instances = `1`
	)

inline

Constructor.

Definition at line 155 of file DrawElements.hpp.

Member Function Documentation

◆ clone()

template<class arr_type>

virtual ref<DrawCall> vl::DrawElements< arr_type >::clone ( ) const

inlinevirtual

Returns a clone of this DrawCall.

Implements vl::DrawCall.

Definition at line 181 of file DrawElements.hpp.

◆ count()

template<class arr_type>

i32 vl::DrawElements< arr_type >::count ( ) const

inline

The number of indices to render, default is -1 which means 'till the end of the indexBuffer() from offset()'.

Definition at line 192 of file DrawElements.hpp.

◆ deleteBufferObject()

template<class arr_type>

virtual void vl::DrawElements< arr_type >::deleteBufferObject ( )

inlinevirtual

Deletes the index buffer's BufferObject.

Implements vl::DrawCall.

Definition at line 215 of file DrawElements.hpp.

◆ indexBuffer() [1/2]

template<class arr_type>

arr_type* vl::DrawElements< arr_type >::indexBuffer ( )

inline

The BufferObject containing the indices used to render.

Definition at line 204 of file DrawElements.hpp.

Referenced by vlX::VLXClassWrapper_DrawCall::exportDrawCall(), vl::Extrusions::extrude(), vl::Extrusion::extrude(), vl::load3DS(), vl::loadAC3D(), vl::loadMD2(), vl::PlyLoader::loadPly(), vl::makeCapsule(), vl::makeCone(), vl::makeCylinder(), vl::makeGrid(), vl::makeIcosahedron(), vl::makeIcosphere(), vl::makeTorus(), vl::makeUVSphere(), vl::Geometry::mergeDrawCallsWithPrimitiveRestart(), vl::Geometry::mergeDrawCallsWithTriangles(), vl::Geometry::mergeTriangleStrips(), vl::DrawElements< ArrayUShort1 >::operator=(), vl::PolygonSimplifier::outputSimplifiedGeometry(), vl::RaycastVolume::RaycastVolume(), vl::DoubleVertexRemover::removeDoubles(), vl::Geometry::shrinkDrawCalls(), vl::Geometry::sortVertices(), vl::TriangleStripGenerator::stripfy(), vl::Geometry::triangulateDrawCalls(), and vl::BezierSurface::updateBezierSurface().

◆ indexBuffer() [2/2]

template<class arr_type>

const arr_type* vl::DrawElements< arr_type >::indexBuffer ( ) const

inline

The BufferObject containing the indices used to render.

Definition at line 207 of file DrawElements.hpp.

◆ indexIterator()

template<class arr_type>

IndexIterator vl::DrawElements< arr_type >::indexIterator ( ) const

inlinevirtual

Returns a IndexIterator used to iterate through the virtual indices of a DrawCall.

This

Note: The returned indices already take into account primitive restart and base vertex.

Implements vl::DrawCall.

Definition at line 357 of file DrawElements.hpp.

◆ offset()

template<class arr_type>

u32 vl::DrawElements< arr_type >::offset ( ) const

inline

The offset in bytes from which the index buffer will be read.

Definition at line 198 of file DrawElements.hpp.

◆ operator=()

template<class arr_type>

DrawElements& vl::DrawElements< arr_type >::operator= ( const DrawElements< arr_type > & other )

inline

Assign operator.

Definition at line 168 of file DrawElements.hpp.

◆ primitiveRestartIndex()

template<class arr_type>

virtual unsigned int vl::DrawElements< arr_type >::primitiveRestartIndex ( )

inlinevirtual

Returns the primitive restart index used by the draw call or 0 if primitive restart is not supported.

Reimplemented from vl::DrawCall.

Definition at line 126 of file DrawElements.hpp.

◆ render()

template<class arr_type>

virtual void vl::DrawElements< arr_type >::render ( bool use_bo ) const

inlinevirtual

Executes the draw call.

Implements vl::DrawCall.

Definition at line 220 of file DrawElements.hpp.

◆ setCount()

template<class arr_type>

void vl::DrawElements< arr_type >::setCount ( i32 count )

inline

The number of indices to render, default is -1 which means 'till the end of the indexBuffer() from offset()'.

Definition at line 189 of file DrawElements.hpp.

◆ setIndexBuffer()

template<class arr_type>

void vl::DrawElements< arr_type >::setIndexBuffer ( arr_type * index_buffer )

inline

The BufferObject containing the indices used to render.

Definition at line 201 of file DrawElements.hpp.

Referenced by vl::DaeLoader::generateGeometry().

◆ setOffset()

template<class arr_type>

void vl::DrawElements< arr_type >::setOffset ( u32 offset )

inline

The offset in bytes from which the index buffer will be read.

Definition at line 195 of file DrawElements.hpp.

◆ triangleIterator()

template<class arr_type>

TriangleIterator vl::DrawElements< arr_type >::triangleIterator ( ) const

inlinevirtual

Returns a TriangleIterator used to iterate through the triangles of a DrawCall.

Basically the iterator tesselates in triangles any DrawCall of type: PT_TRIANGLES, PT_TRIANGLE_STRIP PT_TRIANGLE_FAN, PT_POLYGON, PT_QUADS, PT_QUAD_STRIP.

Implements vl::DrawCall.

Definition at line 348 of file DrawElements.hpp.

◆ updateDirtyBufferObject()

template<class arr_type>

virtual void vl::DrawElements< arr_type >::updateDirtyBufferObject ( EBufferObjectUpdateMode )

inlinevirtual

Updates the index buffer's BufferObject if marked as dirty.

Implements vl::DrawCall.

Definition at line 209 of file DrawElements.hpp.

Member Data Documentation

◆ mCount

template<class arr_type>

i32 vl::DrawElements< arr_type >::mCount

protected

Definition at line 368 of file DrawElements.hpp.

Referenced by vl::DrawElements< ArrayUShort1 >::operator=().

◆ mIndexBuffer

template<class arr_type>

ref< arr_type > vl::DrawElements< arr_type >::mIndexBuffer

protected

Definition at line 367 of file DrawElements.hpp.

◆ mOffset

template<class arr_type>

u32 vl::DrawElements< arr_type >::mOffset

protected

Definition at line 369 of file DrawElements.hpp.

Referenced by vl::DrawElements< ArrayUShort1 >::operator=().

◆ primitive_restart_index

template<class arr_type>

const index_type vl::DrawElements< arr_type >::primitive_restart_index = index_type(~0)

static

The special index which identifies a primitive restart. By default it is set to ~0 that is 0xFF, 0xFFFF, 0xFFFFFFFF respectively for GLubyte, GLushort, GLuint index types. */.

Definition at line 125 of file DrawElements.hpp.

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

C:/git/VL/src/vlGraphics/DrawElements.hpp

Public Types

Public Member Functions

Static Public Attributes

Protected Attributes

Additional Inherited Members

Detailed Description

template<class arr_type> class vl::DrawElements< arr_type >

Member Typedef Documentation

◆ index_type

Constructor & Destructor Documentation

◆ DrawElements()

Member Function Documentation

◆ clone()

◆ count()

◆ deleteBufferObject()

◆ indexBuffer() [1/2]

◆ indexBuffer() [2/2]

◆ indexIterator()

◆ offset()

◆ operator=()

◆ primitiveRestartIndex()

◆ render()

◆ setCount()

◆ setIndexBuffer()

◆ setOffset()

◆ triangleIterator()

◆ updateDirtyBufferObject()

Member Data Documentation

◆ mCount

◆ mIndexBuffer

◆ mOffset

◆ primitive_restart_index

template<class arr_type>
class vl::DrawElements< arr_type >