#2

main.cpp

#include <SDL2/SDL.h>
#include <iostream>
#include <vector>
#include <stdlib.h>
#include <time.h>

void DrawRec(SDL_Renderer* renderer, SDL_Rect r)
{
	SDL_SetRenderDrawColor( renderer, 0, 0, 255, 255 );
	SDL_RenderFillRect( renderer, &r );

	// Render the rect to the screen
	SDL_RenderPresent(renderer);
}
void DrawFood(SDL_Renderer* renderer, SDL_Rect r)
{
	SDL_SetRenderDrawColor( renderer, 26, 255, 26, 255 );
	SDL_RenderFillRect( renderer, &r );

	// Render the rect to the screen
	SDL_RenderPresent(renderer);
}
void DrawBody(SDL_Renderer* renderer, SDL_Rect r)
{
	SDL_SetRenderDrawColor( renderer, 255, 255, 255, 255 );
	SDL_RenderFillRect( renderer, &r );

	// Render the rect to the screen
	SDL_RenderPresent(renderer);
}
void DrawRec(SDL_Renderer* renderer,int x, int y, int w, int h)
{
	SDL_SetRenderDrawColor( renderer, 0, 0, 255, 255 );
	SDL_Rect tmp;
	tmp.x = x;
	tmp.y = y;
	tmp.w = w;
	tmp.h = h;
	SDL_RenderFillRect(renderer, &tmp);

	// Render the rect to the screen
	SDL_RenderPresent(renderer);
}
void Clear(SDL_Renderer* renderer)
{
	SDL_SetRenderDrawColor( renderer, 128, 128, 255, 255 );
	SDL_RenderClear( renderer );
}
int main (int argc, char** argv)
{
	int direction=0;
	std::vector<SDL_Rect> snake_body;
	SDL_Rect snake_head;
	SDL_Rect food;
	food.x = (rand() % 10)*50;
	food.y = (rand() % 10)*50;
	food.w = 50;
	food.h = 50;

	SDL_Window* window = NULL;
	window = SDL_CreateWindow
			(
					"Klimíkův Snake", SDL_WINDOWPOS_UNDEFINED,
					SDL_WINDOWPOS_UNDEFINED,
					500,
					500,
					SDL_WINDOW_SHOWN
			);

	// Setup renderer
	SDL_Renderer* renderer = NULL;
	renderer =  SDL_CreateRenderer( window, -1, SDL_RENDERER_ACCELERATED);

	// Set render color to red ( background will be rendered in this color )


	// Clear winow


	// Creat a rect at pos ( 50, 50 ) that's 50 pixels wide and 50 pixels high.
	snake_head.x = 50;
	snake_head.y = 50;
	snake_head.w = 50;
	snake_head.h = 50;

	// Set render color to blue ( rect will be rendered in this color )
	//Game Loop
	bool isRunning = true;
	int frame = 0;
	int start = SDL_GetTicks();
    SDL_Rect snake_body_last;
	SDL_Rect snake_last;

	while(isRunning)
	{
		if(SDL_GetTicks() - start >= 500)
		{
			Clear(renderer);
			snake_last = snake_head;
			std::cout << "TICK " << SDL_GetTicks() - start << " \n";
			//0 - RIGHT//1 - DOWN// 2-LEFT // 3- UP//ssssd
			if(direction ==0)
				snake_head.x += 50;
			if(direction ==1)
				snake_head.y += 50;
			if(direction ==2)
				snake_head.x -= 50;
			if(direction ==3)
				snake_head.y -= 50;
            if(snake_body.size() >0)
            {
                snake_body_last = snake_body[snake_body.size()-1];
            }

            for (int i = 0; i < snake_body.size(); ++i) {

                if(i == 0)
                {
                    snake_body[i] = snake_last;

                } else{
                    snake_body[i] = snake_body[i-1];
                }
                DrawBody(renderer,snake_body[i]);
            }
			std::cout << snake_head.x << " " << snake_head.y << " : " << food.x << " " << food.y << std::endl;
			if(snake_head.x == food.x && snake_head.y == food.y)
			{
				food.x = (rand() % 10)*50;
				food.y = (rand() % 10)*50;
                if(snake_body.size() == 0)
                {
                    snake_body.push_back(snake_last);
                }
                else{
                    snake_body.push_back(snake_body_last);
                }

			}







            DrawRec(renderer, snake_head);
            DrawFood(renderer,food);
			start=SDL_GetTicks();
		}
		SDL_Event ev;
		while(SDL_PollEvent(&ev) != 0)
		{
			if (ev.type == SDL_QUIT)
				isRunning=false;
			else

			if(ev.type == SDL_KEYDOWN)
			{
				switch (ev.key.keysym.sym)
				{
					case SDLK_d:
						direction = 0;
						break;
					case SDLK_s:
						direction = 1;
						break;
					case SDLK_a:
						direction = 2;
						break;
					case SDLK_w:
						direction = 3;
						break;
					default:

						break;
				}
			}




		}

		SDL_UpdateWindowSurface(window);

	}


	SDL_DestroyWindow(window);
	SDL_Quit();

	return EXIT_SUCCESS;
}