render.h File Reference

#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
#include <box2d/box2d.h>
#include "geometry.h"

Go to the source code of this file.

Functions
void	draw_polygon (SDL_Renderer *renderer, const std::vector< b2Vec2 > &polygon)
	Draws a polygon using an SDL renderer.
void	save_window_to_png (SDL_Renderer *renderer, SDL_Window *window, const std::string &filename)
	Saves the content of an SDL window to a PNG file.

Function Documentation

draw_polygon()

void draw_polygon	(	SDL_Renderer *	renderer,
		const std::vector< b2Vec2 > &	polygon )

Draws a polygon using an SDL renderer.

This function renders a polygon by drawing red lines between consecutive vertices on the provided SDL renderer. It also closes the polygon by drawing a line between the last and first vertex.

Parameters

renderer	Pointer to the SDL_Renderer to use for drawing.
polygon	A vector of b2Vec2 points defining the polygon.

save_window_to_png()

void save_window_to_png	(	SDL_Renderer *	renderer,
		SDL_Window *	window,
		const std::string &	filename )

Saves the content of an SDL window to a PNG file.

This function reads the pixels from the SDL renderer associated with a window and saves the image as a PNG file. It also ensures that the directory path for the output file exists.

Parameters

renderer	Pointer to the SDL_Renderer used for capturing the window content.
window	Pointer to the SDL_Window from which to capture the content.
filename	The file path where the PNG image will be saved.