World Class Reference

Singleton class of the world. More...

#include <classes.hpp>

Collaboration diagram for World:

Public Member Functions
	World (const World &obj)=delete
	Remove copy constructor.
void	clearWorld ()
	Complitely clears pixel_map.
SDL_AppResult	initWorld ()
	Function what defines World::window, World::texture and World::font.
SDL_AppResult	redrawWorld ()
	Redraws pixels on the screen, calls recalcWorld() and addPixel().

Static Public Member Functions
static World *	getIstance ()
	Function what returns the worlds instance. If it's nullptr inwokes World().

Public Attributes
bool	mouse_is_down = false
	Stores current state of the mouse button, used in redrawWorld() to detect then addPixel() should be inwoked.
PixelType	selected_pixel_type
	Currently selected PixelType, used in addPixel().

Private Member Functions
	World ()
	Class constructor, here we define World::bg_color and World::selected_pixel_type.
bool	checkIfCanMove (Vector2 pos, PixelMap *new_pixel_map)
	Checks if position on the screen is avalible for movement.
void	recalcWorld ()
	Recalculates position of each pixel in pixel_map according to their physic behavior.
void	addPixel ()
	Adds new pixel to pixel_map in a radius of BRUSH_SPREAD.

Private Attributes
SDL_Window *	window
	SDL window.
SDL_Renderer *	renderer
	SDL renderer.
TTF_TextEngine *	text_renderer
	TTF engine what is tied to World::renderer to easly render text.
SDL_Texture *	texture
	SDL texture.
TTF_Font *	font
	Fonts that are used for the text on the screen.
Vector2	window_size
	Window width and height in pixels devided by PIXEL_SIZE.
PixelMap	pixel_map
	PixelMap what contains all phical object pixels.
SDL_Color	bg_color
	Background color of the screen.

Static Private Attributes
static World *	instance = nullptr
	Poiner to the one existing instance of the world.

Detailed Description

Singleton class of the world.

Note

Took this as a reference https://www.geeksforgeeks.org/cpp/implementation-of-singleton-class-in-cpp/

Author

-inf (infgotoinf)

Date

2026/03/15

Todo

Make this shit work faster it's toooooooo slow.

Member Function Documentation

checkIfCanMove()

bool World::checkIfCanMove ( Vector2 pos, PixelMap * new_pixel_map )

private

Checks if position on the screen is avalible for movement.

Checks if pos out of window bounds, taken by pixel in World::pixel_map of pixel in new_pixel_map.

Parameters

[in]	pos	X,Y coordinates of the window that are being checked for movement.
[in]	new_pixel_map	PixelMap what is being created.

Returns

true - if pos not avalible

false - overwise

getIstance()

World * World::getIstance ( )

inlinestatic

Function what returns the worlds instance. If it's nullptr inwokes World().

Note

This is how singleton works.

Returns

Pointer to World::instance.

initWorld()

SDL_AppResult World::initWorld

(

)

Function what defines World::window, World::texture and World::font.

Returns

SDL_APP_CONTINUE on success

SDL_APP_FAILURE on error

recalcWorld()

void World::recalcWorld ( )

private

Recalculates position of each pixel in pixel_map according to their physic behavior.

Creates new_pixel_map and for each pixel in World::pixel_map checks on what coordinates it can move with checkIfCanMove() and inserts them in new_pixel_map. And after that replaces World::pixel_map with new_pixel_map.

Note

Took this as a refference:

• https://stackoverflow.com/questions/1500064/renaming-first-and-second-of-a-map-iterator
• https://stackoverflow.com/questions/32590764/can-i-use-stdpair-but-rename-first-and-second-member-names

Todo

Make sand fall under water and water lift above the snad.

redrawWorld()

SDL_AppResult World::redrawWorld

(

)

Redraws pixels on the screen, calls recalcWorld() and addPixel().

Returns

SDL_APP_CONTINUE on success

SDL_APP_FAILURE on error

Todo

(Not sure if we really need this but) Make screen resizing change pixel coordinates in pixel_map, so they don't go off the screen.

Here is the call graph for this function:

---

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

• main/include/classes.hpp
• main/classes.cpp
• main/main.cpp