Moving randomly a square on a window

Data de publicació: Mar 17, 2018 7:6:5 PM

//gcc game_00.c -lm -lSDL2 -lSDL2main -o game_00

#include <SDL2/SDL.h>

#include <math.h>

#define true     1

#define false     0

//Screen dimension in pixels

#define _W 900

#define _H 900

typedef struct punt{

    int x;

    int y;

} t_punt;

void    _init_aleat();

int    _aleat(int n);

int main(int argc, char ** argv)

{

    int quit = false;

    SDL_Event event;

     t_punt punt;

     SDL_Rect rect = {100,100,100,100};

    SDL_Init(SDL_INIT_VIDEO);

    SDL_Window * window = SDL_CreateWindow("SDL2 Chaos Game", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, _W, _H, 0);

    SDL_Renderer * renderer = SDL_CreateRenderer(window, -1, 0);

    _init_aleat();

    while (!quit)

    {

          if (( SDL_PollEvent(&event) ) && (event.type == SDL_QUIT )) quit = true;

                SDL_SetRenderDrawColor(renderer, 0, 0, 0, SDL_ALPHA_OPAQUE);

                SDL_RenderClear(renderer);

                SDL_SetRenderDrawColor(renderer, 255, 255, 255, SDL_ALPHA_OPAQUE);

                rect.x = _aleat(_W);

                rect.y = _aleat(_H);               

                SDL_RenderDrawRect(renderer, &rect);

                SDL_RenderPresent(renderer);

    }

    SDL_DestroyRenderer(renderer);

    SDL_DestroyWindow(window);

    SDL_Quit();

    return 0;

}

void    _init_aleat(){srand(time(NULL));}

int    _aleat(int n){return rand() % n;}

gcc game_00.c -lm -lSDL2 -lSDL2main -o game_00