Renderer Class Reference

Draws all entities with Sprite and Transform components. More...

#include <Renderer.hpp>

Public Member Functions
void	Init (Registry &registry, const float virtualWidth, const float virtualHeight)
	Initialises the renderer and registers sprite change callbacks.

Static Public Member Functions
static bool	SetSprite (const Entity entity, const Component::Sprite &sprite)
	Assigns or replaces the Sprite component on an entity.
static void	RemoveSprite (const Entity entity)
	Removes the Sprite component from an entity.

Public Attributes
Camera2D	camera

Friends
class	Engine

Detailed Description

Draws all entities with Sprite and Transform components.

Manages a sorted sprite pool and a 2D camera. Sprites are sorted by layer then by texture ID so draw calls are batched as much as possible. Entities missing a valid texture are rendered with a purple/black checkerboard placeholder until one is assigned.

The camera is public so scenes can manipulate it directly.

Member Function Documentation

Init()

void Renderer::Init	(	Registry &	registry,
		const float	virtualWidth,
		const float	virtualHeight )

Initialises the renderer and registers sprite change callbacks.

Called automatically by the Engine constructor. Registers OnConstruct, OnUpdate, and OnDestroy callbacks on Component::Sprite so the sprite pool is re-sorted whenever the set of sprites changes.

Parameters

registry	Registry to watch for sprite changes
virtualWidth	Width of the virtual canvas in pixels
virtualHeight	Height of the virtual canvas in pixels

RemoveSprite()

void Renderer::RemoveSprite ( const Entity entity )

static

Removes the Sprite component from an entity.

Does nothing if the entity does not have a sprite.

Parameters

entity

Target entity

SetSprite()

bool Renderer::SetSprite ( const Entity entity, const Component::Sprite & sprite )

static

Assigns or replaces the Sprite component on an entity.

Returns false and leaves the entity unchanged if the sprite's texture is invalid.

Parameters

entity	Target entity
sprite	Sprite to assign

Returns

True if the sprite was applied successfully

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

• src/Engine/Renderer.hpp
• src/Engine/Renderer.cpp