cangine::PrimitiveRenderer Class Reference

Batches and draws untextured geometric primitives. More...

#include <primitive_renderer.hpp>

Collaboration diagram for cangine::PrimitiveRenderer:

Public Member Functions
	PrimitiveRenderer (Shader *shader)
	Constructs the renderer with a shader.
void	beginFrame ()
	Resets the batch at the start of a frame.
void	endFrame ()
	Flushes the accumulated batch to the GPU.
void	draw (const Triangle &t)
	Adds a triangle to the current batch.
void	draw (const Rectangle &t)
	Adds a rectangle to the current batch.
void	setShader (Shader *shader)
	Replaces the shader used for drawing.

Private Attributes
std::vector< Vertex >	vertices
	Accumulated vertices for the current frame.
VAO	vao
	Vertex array describing the layout.
VBO	vbo
	Vertex buffer holding the batched data.
Shader *	shader
	Shader used to draw the primitives.

Static Private Attributes
static PrimitiveRenderer *	instance = nullptr
	Singleton instance.

Detailed Description

Batches and draws untextured geometric primitives.

Accumulates triangle/rectangle vertices over a frame and submits them to the GPU as a single batch, using a supplied Shader.

Constructor & Destructor Documentation

PrimitiveRenderer()

cangine::PrimitiveRenderer::PrimitiveRenderer

(

Shader *

shader

)

Constructs the renderer with a shader.

Parameters

shader

Shader used for drawing primitives.

Member Function Documentation

beginFrame()

void cangine::PrimitiveRenderer::beginFrame

(

)

Resets the batch at the start of a frame.

draw() [1/2]

void cangine::PrimitiveRenderer::draw

(

const Rectangle &

t

)

Adds a rectangle to the current batch.

Parameters

t	Rectangle to draw.

draw() [2/2]

void cangine::PrimitiveRenderer::draw

(

const Triangle &

t

)

Adds a triangle to the current batch.

Parameters

t	Triangle to draw.

endFrame()

void cangine::PrimitiveRenderer::endFrame

(

)

Flushes the accumulated batch to the GPU.

setShader()

void cangine::PrimitiveRenderer::setShader

(

Shader *

shader

)

Replaces the shader used for drawing.

Parameters

shader

New shader to use.

Member Data Documentation

instance

PrimitiveRenderer * cangine::PrimitiveRenderer::instance = nullptr

staticprivate

Singleton instance.

shader

Shader* cangine::PrimitiveRenderer::shader

private

Shader used to draw the primitives.

vao

VAO cangine::PrimitiveRenderer::vao

private

Vertex array describing the layout.

vbo

VBO cangine::PrimitiveRenderer::vbo

private

Vertex buffer holding the batched data.

vertices

std::vector<Vertex> cangine::PrimitiveRenderer::vertices

private

Accumulated vertices for the current frame.

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

• cangine/src/cangine/render/renderer/primitive_renderer.hpp
• cangine/src/cangine/render/renderer/primitive_renderer.cpp