SLGLVertexArray adds Helper Functions for quick Line & Point Drawing. More...

#include <SLGLVertexArrayExt.h>

Inheritance diagram for SLGLVertexArrayExt:

Public Member Functions
	SLGLVertexArrayExt ()

virtual	~SLGLVertexArrayExt ()

void	generateVertexPos (SLVVec2f *p)
	Adds or updates & generates a position vertex attribute for colored line or point drawing. More...

void	generateVertexPos (SLVVec3f *p)
	Adds or updates & generates a position vertex attribute for colored line or point drawing. More...

void	generateVertexPos (SLVVec4f *p)
	Adds or updates & generates a position vertex attribute for colored line or point drawing. More...

void	drawArrayAsColored (SLGLPrimitiveType primitiveType, SLCol4f color, SLfloat lineOrPointSize=1.0f, SLuint indexFirstVertex=0, SLuint countVertices=0)
	Draws the array as the specified primitive with the color. More...

void	drawElementAsColored (SLGLPrimitiveType primitiveType, SLCol4f color, SLfloat pointSize, SLuint indexFirstVertex=0, SLuint countVertices=0)
	Draws the VAO by element indices with the specified primitive with the color. More...

Public Member Functions inherited from SLGLVertexArray
	SLGLVertexArray ()

	~SLGLVertexArray ()

void	deleteGL ()
	Deletes all vertex array & vertex buffer objects. More...

void	clearAttribs ()
	Clears the attribute definition. More...

SLuint	vaoID () const
	Returns either the VAO id or the VBO id. More...

SLuint	tfoID () const
	Returns the TFO id. More...

void	setAttrib (SLGLAttributeType type, SLint elementSize, SLint location, void *dataPointer, SLGLBufferType dataType=BT_float)
	Adds a vertex attribute with data pointer and an element size. More...

void	setAttrib (SLGLAttributeType type, SLint location, SLVuint *data)
	Adds a vertex attribute with vector of SLuint. More...

void	setAttrib (SLGLAttributeType type, SLint location, SLVfloat *data)
	Adds a vertex attribute with vector of SLfloat. More...

void	setAttrib (SLGLAttributeType type, SLint location, SLVVec2f *data)
	Adds a vertex attribute with vector of SLVec2f. More...

void	setAttrib (SLGLAttributeType type, SLint location, SLVVec3f *data)
	Adds a vertex attribute with vector of SLVec3f. More...

void	setAttrib (SLGLAttributeType type, SLint location, SLVVec4f *data)
	Adds a vertex attribute with vector of SLVec4f. More...

void	setAttrib (SLGLAttributeType type, SLint location, SLVVec4i *data)
	Adds a vertex attribute with vector of SLVec4i. More...

void	setIndices (SLuint numIndicesElements, SLGLBufferType indexDataType, void indexDataElements, SLuint numIndicesEdges=0, void indexDataEdges=nullptr)
	Adds the index array for indexed element drawing. More...

void	setIndices (SLVubyte indicesElements, SLVubyte indicesEdges=nullptr)
	Adds the index array for indexed element drawing with a vector of ubyte. More...

void	setIndices (SLVushort indicesElements, SLVushort indicesEdges=nullptr)
	Adds the index array for indexed element drawing with a vector of ushort. More...

void	setIndices (SLVuint indicesElements, SLVuint indicesEdges=nullptr)
	Adds the index array for indexed element drawing with a vector of uint. More...

void	setInstanceVBO (SLGLVertexBuffer *vbo, SLuint divisor=0)
	Attach a VBO that has been created outside of this VAO. More...

void	updateAttrib (SLGLAttributeType type, SLint elementSize, void *dataPointer)
	Updates a specific vertex attribute in the VBO. More...

void	updateAttrib (SLGLAttributeType type, SLVuint *data)
	Updates a specific vertex attribute in the VBO. More...

void	updateAttrib (SLGLAttributeType type, SLVfloat *data)
	Updates a specific vertex attribute in the VBO. More...

void	updateAttrib (SLGLAttributeType type, SLVVec2f *data)
	Updates a specific vertex attribute in the VBO. More...

void	updateAttrib (SLGLAttributeType type, SLVVec3f *data)
	Updates a specific vertex attribute in the VBO. More...

void	updateAttrib (SLGLAttributeType type, SLVVec4f *data)
	Updates a specific vertex attribute in the VBO. More...

void	generate (SLuint numVertices, SLGLBufferUsage usage=BU_static, SLbool outputInterleaved=true, SLuint divisor=0)
	Generates the VA & VB objects for a NO. of vertices. More...

void	generateTF (SLuint numVertices, SLGLBufferUsage usage=BU_static, SLbool outputInterleaved=true, SLuint divisor=0)
	Generates the VA & VB & TF objects. More...

void	beginTF (SLuint tfoID)
	Begin transform feedback. More...

void	endTF ()
	End transform feedback. More...

void	drawElementsAs (SLGLPrimitiveType primitiveType, SLuint numIndexes=0, SLuint indexOffsetBytes=0)
	Draws the VAO by element indices with a primitive type. More...

void	drawArrayAs (SLGLPrimitiveType primitiveType, SLint firstVertex=0, SLsizei countVertices=0)
	Draws the VAO as an array with a primitive type. More...

void	drawElementsInstanced (SLGLPrimitiveType primitiveType, SLuint countInstance=0, SLuint numIndexes=0, SLuint indexOffset=0)
	Draws the VAO as an array with instance primitive type. More...

void	drawEdges (SLCol4f color, SLfloat lineWidth=1.0f)
	Draws the hard edges of the VAO with the edge indices. More...

SLuint	numVertices () const

SLuint	numIndicesElements () const

SLuint	numIndicesEdges () const

SLGLVertexBuffer *	vbo ()

Private Member Functions
void	generateVertexPos (SLuint numVertices, SLint elementSize, void *dataPointer)
	Adds or updates & generates a position vertex attribute for colored line or point drawing. More...

Additional Inherited Members
Static Public Attributes inherited from SLGLVertexArray
static SLuint	totalDrawCalls = 0

static SLuint	totalPrimitivesRendered = 0
	static total no. of draw calls More...

Protected Attributes inherited from SLGLVertexArray
SLuint	_instances
	static total no. of primitives rendered More...

SLuint	_vaoID
	Number of instances of drawing. More...

SLuint	_tfoID
	OpenGL id of vertex array object. More...

SLuint	_numVertices
	OpenGL id of transform feedback object. More...

SLGLVertexBuffer	_vbo
	NO. of vertices in array. More...

SLuint	_idVBOIndices
	Vertex buffer object for float attributes. More...

size_t	_numIndicesElements
	OpenGL id of index vbo. More...

void *	_indexDataElements
	NO. of vertex indices in array for triangles, lines or points. More...

size_t	_numIndicesEdges
	Pointer to index data for elements. More...

void *	_indexDataEdges
	NO. of vertex indices in array for hard edges. More...

SLGLBufferType	_indexDataType
	Pointer to index data for hard edges. More...

SLGLVertexBuffer *	_instanceVbo
	index data type (ubyte, ushort, uint) More...

SLuint	_instanceDivisor
	Vertex buffer object containing the positions for instanced drawing. More...

Detailed Description

SLGLVertexArray adds Helper Functions for quick Line & Point Drawing.

These functions where separated from SLGLVertexAttribute because they use the predefined shader ColorUniform and have there for references to the classes SLScene and SLGLProgram.

Definition at line 22 of file SLGLVertexArrayExt.h.

Constructor & Destructor Documentation

◆ SLGLVertexArrayExt()

SLGLVertexArrayExt::SLGLVertexArrayExt ( )

inline

Definition at line 25 of file SLGLVertexArrayExt.h.

25 { ; }

◆ ~SLGLVertexArrayExt()

virtual SLGLVertexArrayExt::~SLGLVertexArrayExt ( )

inlinevirtual

Definition at line 26 of file SLGLVertexArrayExt.h.

26 { ; }

Member Function Documentation

◆ drawArrayAsColored()

void SLGLVertexArrayExt::drawArrayAsColored	(	SLGLPrimitiveType	primitiveType,
		SLCol4f	color,
		SLfloat	pointSize = `1.0f`,
		SLuint	indexFirstVertex = `0`,
		SLuint	countVertices = `0`
	)

Draws the array as the specified primitive with the color.

Draws the vertex positions as array with a specified primitive & color

Definition at line 46 of file SLGLVertexArrayExt.cpp.

 {
     assert(countVertices <= _numVertices);
  
     if (!_vbo.id())
         SL_EXIT_MSG("No VBO generated for VAO in drawArrayAsColored.");
  
     // Prepare shader
     SLGLProgram* sp      = SLGLProgramManager::get(SP_colorUniform);
     SLGLState*   stateGL = SLGLState::instance();
     sp->useProgram();
     sp->uniformMatrix4fv("u_mMatrix", 1, (SLfloat*)&stateGL->modelMatrix);
     sp->uniformMatrix4fv("u_vMatrix", 1, (SLfloat*)&stateGL->viewMatrix);
     sp->uniformMatrix4fv("u_pMatrix", 1, (SLfloat*)&stateGL->projectionMatrix);
     sp->uniform1f("u_oneOverGamma", 1.0f);
     stateGL->currentMaterial(nullptr);
  
     // Set uniform color
     glUniform4fv(sp->getUniformLocation("u_matDiff"), 1, (SLfloat*)&color);
  
 #if not defined(SL_GLES) && not defined(SL_EMSCRIPTEN)
     if (pointSize != 1.0f)
         if (primitiveType == PT_points)
             glPointSize(pointSize);
 #endif
  
     //////////////////////////////////////
     drawArrayAs(primitiveType,
                 (SLsizei)indexFirstVertex,
                 (SLsizei)countVertices);
     //////////////////////////////////////
  
 #if not defined(SL_GLES) && not defined(SL_EMSCRIPTEN)
     if (pointSize != 1.0f)
         if (primitiveType == PT_points)
             glPointSize(1.0f);
 #endif
  
     GET_GL_ERROR;
 }

◆ drawElementAsColored()

void SLGLVertexArrayExt::drawElementAsColored	(	SLGLPrimitiveType	primitiveType,
		SLCol4f	color,
		SLfloat	pointSize,
		SLuint	indexFirstVertex = `0`,
		SLuint	countVertices = `0`
	)

Draws the VAO by element indices with the specified primitive with the color.

Draws the vertex positions as array with a specified primitive & color

Definition at line 93 of file SLGLVertexArrayExt.cpp.

 {
     assert(countVertices <= _numVertices);
  
     if (!_vbo.id())
         SL_EXIT_MSG("No VBO generated for VAO in drawArrayAsColored.");
  
     // Prepare shader
     SLGLProgram* sp      = SLGLProgramManager::get(SP_colorUniform);
     SLGLState*   stateGL = SLGLState::instance();
     sp->useProgram();
     sp->uniformMatrix4fv("u_mMatrix", 1, (SLfloat*)&stateGL->modelMatrix);
     sp->uniformMatrix4fv("u_vMatrix", 1, (SLfloat*)&stateGL->viewMatrix);
     sp->uniformMatrix4fv("u_pMatrix", 1, (SLfloat*)&stateGL->projectionMatrix);
     sp->uniform1f("u_oneOverGamma", 1.0f);
     stateGL->currentMaterial(nullptr);
  
     // Set uniform color
     glUniform4fv(sp->getUniformLocation("u_matDiff"), 1, (SLfloat*)&color);
  
 #if not defined(SL_GLES) && not defined(SL_EMSCRIPTEN)
     if (pointSize != 1.0f)
         if (primitiveType == PT_points)
             glPointSize(pointSize);
 #endif
  
     ////////////////////////////////
     drawElementsAs(primitiveType,
                    indexFirstVertex,
                    countVertices);
     ////////////////////////////////
  
 #if not defined(SL_GLES) && not defined(SL_EMSCRIPTEN)
     if (pointSize != 1.0f)
         if (primitiveType == PT_points)
             glPointSize(1.0f);
 #endif
  
     GET_GL_ERROR;
 }

◆ generateVertexPos() [1/4]

void SLGLVertexArrayExt::generateVertexPos	(	SLuint	numVertices,
		SLint	elementSize,
		void *	dataPointer
	)

private

Adds or updates & generates a position vertex attribute for colored line or point drawing.

Helper function that sets the vertex position attribute and generates or updates the vertex buffer from it. It is used together with the drawArrayAsColored function.

Definition at line 22 of file SLGLVertexArrayExt.cpp.

 {
     assert(dataPointer);
     assert(elementSize);
     assert(numVertices);
  
     SLGLProgram* sp = SLGLProgramManager::get(SP_colorUniform);
     sp->useProgram();
     SLint location = AT_position;
  
     // Add attribute if it doesn't exist
     if (_vbo.attribIndex(AT_position) == -1)
     {
         setAttrib(AT_position, elementSize, location, dataPointer);
         generate(numVertices, BU_static, false);
     }
     else
         updateAttrib(AT_position, elementSize, dataPointer);
 }

◆ generateVertexPos() [2/4]

void SLGLVertexArrayExt::generateVertexPos ( SLVVec2f * p )

inline

Adds or updates & generates a position vertex attribute for colored line or point drawing.

Definition at line 29 of file SLGLVertexArrayExt.h.

29 { generateVertexPos((SLuint)p->size(), 2, &p->operator[](0)); }

SLuint

unsigned int SLuint

Definition: SL.h:171

SLGLVertexArrayExt::generateVertexPos

void generateVertexPos(SLVVec2f *p)

Adds or updates & generates a position vertex attribute for colored line or point drawing.

Definition: SLGLVertexArrayExt.h:29

◆ generateVertexPos() [3/4]

void SLGLVertexArrayExt::generateVertexPos ( SLVVec3f * p )

inline

Adds or updates & generates a position vertex attribute for colored line or point drawing.

Definition at line 32 of file SLGLVertexArrayExt.h.

32 { generateVertexPos((SLuint)p->size(), 3, &p->operator[](0)); }

◆ generateVertexPos() [4/4]

void SLGLVertexArrayExt::generateVertexPos ( SLVVec4f * p )

inline

Adds or updates & generates a position vertex attribute for colored line or point drawing.

Definition at line 35 of file SLGLVertexArrayExt.h.

35 { generateVertexPos((SLuint)p->size(), 4, &p->operator[](0)); }

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

Public Member Functions

Private Member Functions

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ SLGLVertexArrayExt()

◆ ~SLGLVertexArrayExt()

Member Function Documentation

◆ drawArrayAsColored()

◆ drawElementAsColored()

◆ generateVertexPos() [1/4]

◆ generateVertexPos() [2/4]

◆ generateVertexPos() [3/4]

◆ generateVertexPos() [4/4]