The BezierSurface class implements a Geometry that is capable of visualizing multiple bicubic Bézier patches (see BezierPatch). More...

#include <BezierSurface.hpp>

Inheritance diagram for vl::BezierSurface:

Public Member Functions
	BezierSurface ()
	Constructor. More...

std::vector< ref< BezierPatch > > &	patches ()
	Returns the Bézier patches that are part of this Bézier surface. More...

const std::vector< ref< BezierPatch > > &	patches () const
	Returns the Bézier patches that are part of this Bézier surface. More...

void	setDetail (unsigned i)
	The sampling level of the patch, must not be less than 2. The higher the sampling level, the more detailed the patch will be. More...

unsigned	detail () const
	The sampling level of the patch, must not be less than 2. The higher the sampling level, the more detailed the patch will be. More...

void	updateBezierSurface (bool gen_tex_coords=true)
	Generates the Bézier surface geometry based on the current patches and detail. More...

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

virtual	~Geometry ()
	Destructor. More...

ref< Geometry >	shallowCopy () const
	Performs a shallow copy of a Geometry. More...

Geometry &	shallowCopyFrom (const Geometry &)
	Performs a shallow copy of the specified Geometry. More...

ref< Geometry >	deepCopy () const
	Performs a deep copy of a Geometry. More...

Geometry &	deepCopyFrom (const Geometry &)
	Performs a deep copy of the specified Geometry. More...

Collection< DrawCall > &	drawCalls ()
	Returns the list of DrawCall objects bound to a Geometry. More...

const Collection< DrawCall > &	drawCalls () const
	Returns the list of DrawCall objects bound to a Geometry. More...

void	setColorArray (const fvec4 &color)
	Fills the color array with the given color. More...

virtual void	clearArrays (bool clear_draw_calls=true)
	Removes all the previously installed arrays. More...

virtual void	updateDirtyBufferObject (EBufferObjectUpdateMode mode)
	Updates all the vertex buffer objects of both vertex arrays and draw calls that are marked as dirty. More...

virtual void	deleteBufferObject ()
	Deletes all the vertex buffer objects of both vertex arrays and draw calls. More...

void	computeNormals (bool verbose=false)
	Computes the normals in a "smooth" way, i.e. More...

bool	flipNormals ()
	Inverts the orientation of the normals. More...

void	fixTriangleWinding ()
	Converts all draw calls to triangles and fixes their winding according to the Geometry's normals. More...

void	transform (const mat4 &matr, bool normalize=true)
	Transforms vertices and normals belonging to this geometry. More...

void	convertDrawCallToDrawArrays ()
	Converts all the DrawCall objects bound to a Geometry into DrawArrays. More...

DrawCall *	mergeTriangleStrips ()
	Merges all the PT_TRIANGLE_STRIP DrawElementsUInt objects into one single PT_TRIANGLE_STRIP DrawElementsUInt. More...

void	mergeDrawCallsWithPrimitiveRestart (EPrimitiveType primitive_type)
	Merges all the draw calls that use the given primitive type into one single draw call using primitive restart. More...

void	mergeDrawCallsWithMultiDrawElements (EPrimitiveType primitive_type)
	Merges all the draw calls that use the given primitive type into one single MultiDrawElements draw call. More...

void	mergeDrawCallsWithTriangles (EPrimitiveType primitive_type)
	Merges all the draw calls that use the given primitive type or PT_TRIANGLES into one single PT_TRIANGLES draw call. More...

void	triangulateDrawCalls ()
	Converts PT_QUADS, PT_QUADS_STRIP and PT_POLYGON into PT_TRIANGLE primitives. More...

DrawRangeElements MultiDrawElements to the best fitting of UInt UShort UByte taking into instancing and base vertex note Primitive type can be any void	shrinkDrawCalls ()

void	makeGLESFriendly ()
	Calls triangulateDrawCalls() and shrinkDrawCalls(). More...

bool	sortVertices ()
	Sorts the vertices of the geometry (position, normals, textures, colors etc.) to maximize vertex-cache coherency. More...

void	regenerateVertices (const std::vector< u32 > &map_new_to_old)
	Regenerates the vertex position and attributes using the given new-to-old map. More...

void	colorizePrimitives ()
	Assigns a random color to each vertex of each DrawCall object. If a vertex is shared among more than one DrawCall object its color is undefined. More...

void	setVertexArray (ArrayAbstract *data)
	Conventional vertex array. More...

const ArrayAbstract *	vertexArray () const
	Conventional vertex array. More...

ArrayAbstract *	vertexArray ()
	Conventional vertex array. More...

void	setNormalArray (ArrayAbstract *data)
	Conventional normal array. More...

const ArrayAbstract *	normalArray () const
	Conventional normal array. More...

ArrayAbstract *	normalArray ()
	Conventional normal array. More...

void	setColorArray (ArrayAbstract *data)
	Conventional color array. More...

const ArrayAbstract *	colorArray () const
	Conventional color array. More...

ArrayAbstract *	colorArray ()
	Conventional color array. More...

void	setSecondaryColorArray (ArrayAbstract *data)
	Conventional secondary color array. More...

const ArrayAbstract *	secondaryColorArray () const
	Conventional secondary color array. More...

ArrayAbstract *	secondaryColorArray ()
	Conventional secondary color array. More...

void	setFogCoordArray (ArrayAbstract *data)
	Conventional fog array. More...

const ArrayAbstract *	fogCoordArray () const
	Conventional fog array. More...

ArrayAbstract *	fogCoordArray ()
	Conventional fog array. More...

void	setTexCoordArray (int tex_unit, ArrayAbstract *data)
	Conventional texture coords arrays. More...

const ArrayAbstract *	texCoordArray (int tex_unit) const
	Conventional texture coords arrays. More...

ArrayAbstract *	texCoordArray (int tex_unit)
	Conventional texture coords arrays. More...

void	setVertexAttribArray (int attrib_location, const ArrayAbstract *info)
	Binds a generic vertex attribute. More...

const ArrayAbstract *	vertexAttribArray (int attrib_location) const
	Returns a generic vertex attribute's info. More...

ArrayAbstract *	vertexAttribArray (int attrib_location)
	Returns a generic vertex attribute's info. More...

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

virtual	~Renderable ()
	Destructor. More...

void	render (const Actor actor, const Shader shader, const Camera camera, OpenGLContext gl_context)
	Renders the Renderable and if necessary compiles the display list and updates the BufferObjects. More...

void	computeBounds ()
	Recomputes the bounding box and bounding sphere of a Renderable. More...

long long	boundsUpdateTick () const
	Returns the bounds-update-tick which is a counter incremented every time the bounding box or bounding sphere is updated. More...

void	setBoundsDirty (bool dirty)
	Marks the bounding box and bounding sphere as dirty in order to be recomputed at the next rendering. More...

bool	boundsDirty () const
	Returns whether the bounding sphere or bounding box are "dirty", that is, meant to be recomputed. More...

void	setBoundingBox (const AABB &aabb)
	Sets the bounding box of a Renderable. More...

void	setBoundingSphere (const Sphere &sphere)
	Sets the bounding sphere of a Renderable. More...

const AABB &	boundingBox () const
	Returns the bounding box of a Renderable without recomputing the bounds if dirty. More...

const Sphere &	boundingSphere () const
	Returns the bounding sphere of a Renderable without recomputing the bounds if dirty. More...

const AABB &	boundingBox ()
	Returns the bounding box of a Renderable recomputing the bounds if dirty. More...

const Sphere &	boundingSphere ()
	Returns the bounding sphere of a Renderable recomputing the bounds if dirty. More...

unsigned int	displayList () const
	Returns the display list associated to a Renderable or 0 (zero) if no display list is associated. More...

void	setDisplayList (unsigned int disp_list)
	Manually assciates a display list to a Renderable (to be used with care). More...

bool	isDisplayListEnabled () const
	Returns `true` if display lists are enabled for a Renderable (disabled by default). More...

void	setDisplayListEnabled (bool enabled)
	Enable/disable display lists (disabled by default). More...

bool	displayListDirty () const
	Whether the display list associated to a Renderable should be recompiled at the next rendering. More...

void	setDisplayListDirty (bool dirty)
	Whether the display list associated to a Renderable should be recompiled at the next rendering. More...

bool	isBufferObjectEnabled () const
	Returns `true` if BufferObject (vertex buffer object) are enabled for a Renderable (enabled by default). More...

void	setBufferObjectEnabled (bool enabled)
	Enable/disable BufferObject (vertex buffer object) (enabled by default). More...

bool	isBufferObjectDirty () const
	Whether BufferObjects associated to a Renderable should be recomputed on the next rendering. More...

void	setBufferObjectDirty (bool dirty=true)
	Whether BufferObjects associated to a Renderable should be recomputed on the next rendering. More...

void	deleteDisplayList ()
	Deletes the display list currently associated to a Renderable. 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...

Protected Attributes
std::vector< ref< BezierPatch > >	mPatches

unsigned	mDetail

Protected Attributes inherited from vl::Geometry
Collection< DrawCall >	mDrawCalls

ref< ArrayAbstract >	mVertexAttribArrays [VA_MaxAttribCount]

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

IMutex *	mRefCountMutex

int	mReferenceCount

bool	mAutomaticDelete

Additional Inherited Members
Static Public Member Functions inherited from vl::Geometry
static void	computeTangentSpace (u32 vert_count, const vl::fvec3 vertex, const vl::fvec3 normal, const vl::fvec2 texcoord, const vl::DrawCall primitives, vl::fvec3 tangent, vl::fvec3 bitangent)
	Computes the tangent (and optionally bitangent) vectors used to form a TBN matrix to be used for bumpmapping. More...

Public Attributes inherited from vl::Geometry
DrawRangeElements MultiDrawElements to the best fitting of UInt UShort UByte taking into	account: primitive restart
	Shrinks DrawElements. More...

Protected Member Functions inherited from vl::Geometry
virtual void	computeBounds_Implementation ()

virtual void	render_Implementation (const Actor actor, const Shader shader, const Camera camera, OpenGLContext gl_context) const

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

Detailed Description

The BezierSurface class implements a Geometry that is capable of visualizing multiple bicubic Bézier patches (see BezierPatch).

From Wikipedia [http://en.wikipedia.org/wiki/Bézier_surface]:

"Bézier surfaces are a species of mathematical spline used in computer graphics, computer-aided design, and finite element modelling. As with the Bézier curve, a Bézier surface is defined by a set of control points. Similar to interpolation in many respects, a key difference is that the surface does not, in general, pass through the central control points; rather, it is "stretched" toward them as though each were an attractive force. They are visually intuitive, and for many applications, mathematically convenient."

"Bézier surfaces were first described in 1972 by the French engineer Pierre Bézier who used them to design automobile bodies. Bézier surfaces can be of any degree, but bicubic Bézier surfaces generally provide enough degrees of freedom for most applications."

Constructor & Destructor Documentation

◆ BezierSurface()

vl::BezierSurface::BezierSurface ( )

inline

Constructor.

Definition at line 100 of file BezierSurface.hpp.

Member Function Documentation

◆ detail()

unsigned vl::BezierSurface::detail ( ) const

inline

The sampling level of the patch, must not be less than 2. The higher the sampling level, the more detailed the patch will be.

Definition at line 114 of file BezierSurface.hpp.

◆ patches() [1/2]

std::vector< ref<BezierPatch> >& vl::BezierSurface::patches ( )

inline

Returns the Bézier patches that are part of this Bézier surface.

Definition at line 106 of file BezierSurface.hpp.

Referenced by vl::makeTeapot().

◆ patches() [2/2]

const std::vector< ref<BezierPatch> >& vl::BezierSurface::patches ( ) const

inline

Returns the Bézier patches that are part of this Bézier surface.

Definition at line 108 of file BezierSurface.hpp.

◆ setDetail()

void vl::BezierSurface::setDetail ( unsigned i )

inline

The sampling level of the patch, must not be less than 2. The higher the sampling level, the more detailed the patch will be.

Definition at line 111 of file BezierSurface.hpp.

Referenced by vl::makeTeapot().

◆ updateBezierSurface()

void BezierSurface::updateBezierSurface ( bool gen_tex_coords = true )

Generates the Bézier surface geometry based on the current patches and detail.

Note that this method does not recompte the normals of the mesh, this means that if you are using the OpenGL lighting or other techniques requiring vertex normals you should call computeNormals() right after calling this function.

Parameters

gen_tex_coords If set to true the function will also generate normalized (0..1) texture coordinates.

Definition at line 87 of file BezierSurface.cpp.

References vl::BezierPatch::at(), vl::Array< T_VectorType, T_Scalar, T_GL_Size, T_GL_Type >::at(), vl::ref< T >::get(), vl::DrawElements< arr_type >::indexBuffer(), NULL, vl::PT_QUADS, vl::Array< T_VectorType, T_Scalar, T_GL_Size, T_GL_Type >::resize(), vl::ArrayAbstract::setBufferObjectDirty(), vl::BezierPatch::x(), vl::Vector2< T_Scalar >::x(), vl::BezierPatch::y(), and vl::Vector2< T_Scalar >::y().

Referenced by vl::makeTeapot().

Member Data Documentation

◆ mDetail

unsigned vl::BezierSurface::mDetail

protected

Definition at line 124 of file BezierSurface.hpp.

◆ mPatches

std::vector< ref<BezierPatch> > vl::BezierSurface::mPatches

protected

Definition at line 123 of file BezierSurface.hpp.

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

C:/git/VL/src/vlGraphics/BezierSurface.hpp
C:/git/VL/src/vlGraphics/BezierSurface.cpp

Public Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ BezierSurface()

Member Function Documentation

◆ detail()

◆ patches() [1/2]

◆ patches() [2/2]

◆ setDetail()

◆ updateBezierSurface()

Member Data Documentation

◆ mDetail

◆ mPatches