nta::SpriteBatch Class Reference

#include <SpriteBatch.h>

Collaboration diagram for nta::SpriteBatch:

Public Member Functions
	SpriteBatch ()
	constructor and destructor
void	init ()
	initializes the batch
void	begin ()
	begins collection of glyphs for the batch
void	end ()
	ends collection of glyphs and prepares to render
void	addGlyph (crvec4 posRect, GLuint texture=0, crvec4 uvRect=glm::vec4(0, 0, 1, 1), crvec4 color=glm::vec4(1), float depth=0.5)
void	addGlyph (crvec4 posRect, crvec4 uvRect, GLuint texture, float depth=0.5, crvec4 color=glm::vec4(1))
void	addGlyph (crvec2 corner1, crvec2 corner2, crvec4 uvRect, GLuint texture, float depth=0.5, crvec4 color=glm::vec4(1))
void	addGlyph (crvec4 posRect, crvec4 uvRect, GLuint texture, crvec4 color, float angle=0.0f, float depth=0.5)
void	addGlyph (crvec2 corner1, crvec2 corner2, crvec4 uvRect, GLuint texture, crvec4 color, float angle=0.0f, float depth=0.5)
void	render () const
	renders the batch

Private Member Functions
void	createVertexArrayObject ()
	creates the vertex array object
void	createRenderBatches ()
	creates the render batches
void	sortGlyphs ()
	sorts the glyphs

Static Private Member Functions
static bool	compareTexture (Glyph *lhs, Glyph *rhs)
	comparers used to sort
static bool	compareDepth (Glyph *lhs, Glyph *rhs)

Private Attributes
std::vector< Glyph * >	m_glyphPointers
	pointers to the glyphs to be rendered (used for sorting)
std::vector< Glyph >	m_glyphs
	the glyphs to be rendered (used for fast vector operations)
std::vector< RenderBatch >	m_renderBatches
	the render batches used for rendering the glyphs
GLuint	m_vao = 0
	ids of the vertex buffer object and vertex array object used to render the glyphs
GLuint	m_vbo = 0

Detailed Description

represents a collection of sprites to be drawn

If you want to draw a shape other than a square, use PrimitiveBatch instead

Todo:

Allow for custom vertex types (Important)

Rewrite to use glDrawElements instead of glDrawArrays

Definition at line 87 of file SpriteBatch.h.

Member Function Documentation

addGlyph()

void nta::SpriteBatch::addGlyph	(	crvec4	posRect,
		GLuint	texture = 0,
		crvec4	uvRect = glm::vec4(0,0,1,1),
		crvec4	color = glm::vec4(1),
		float	depth = 0.5
	)

adds a glyph to the batch

Todo:

Give some of these different names?

Definition at line 100 of file SpriteBatch.cpp.

Referenced by nta::ParticleBatch2D::draw(), nta::SpriteFont::drawText(), and nta::SpriteFont::drawTexture().

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

• include/nta/SpriteBatch.h
• src/SpriteBatch.cpp