First upload
This commit is contained in:
Daniel Cortés
11
Makefile
Normal file
11
Makefile
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@@ -0,0 +1,11 @@
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OBJS = main.cpp
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CC = g++
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COMPILER_FLAGS = -Wall
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LINKER_FLAGS = -lSDL2
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OBJ_NAME = run
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all: $(OBJS)
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$(CC) $(OBJS) $(COMPILER_FLAGS) $(LINKER_FLAGS) -o $(OBJ_NAME)
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clean:
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rm *.o $(OBJ_NAME)
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208
main.cpp
Normal file
208
main.cpp
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@@ -0,0 +1,208 @@
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#include<iostream>
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#include<list>
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#include<cstdlib>
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#include<iostream>
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#include<SDL2/SDL.h>
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const int WORLD_WIDTH = 240;
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const int WORLD_HEIGHT = 160;
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const int SCREEN_WIDTH = WORLD_WIDTH * 4;
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const int SCREEN_HEIGHT = WORLD_HEIGHT * 4;
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const int TILE_SIZE = 10;
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Uint32 MS_PER_UPDATE = 100;
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SDL_Window *gWindow = nullptr;
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SDL_Renderer *gRenderer = nullptr;
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bool init() {
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if (SDL_Init(SDL_INIT_VIDEO) < 0){
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std::cout << "SDL_Init Error: " << SDL_GetError() << std::endl;
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return false;
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}
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gWindow = SDL_CreateWindow("Snake", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, SCREEN_WIDTH, SCREEN_HEIGHT, SDL_WINDOW_SHOWN);
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if(gWindow == nullptr) {
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std::cout << "SDL_CreateWindow Error: " << SDL_GetError() << std::endl;
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return false;
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}
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gRenderer = SDL_CreateRenderer(gWindow, -1, 0);
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if(gRenderer == nullptr) {
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std::cout << "SDL_CreateRenderer Error: " << SDL_GetError() << std::endl;
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return false;
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}
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SDL_SetHint(SDL_HINT_RENDER_SCALE_QUALITY, "2");
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SDL_RenderSetLogicalSize(gRenderer, WORLD_WIDTH, WORLD_HEIGHT);
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return true;
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}
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void close() {
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SDL_DestroyWindow(gWindow);
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gWindow = nullptr;
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SDL_DestroyRenderer(gRenderer);
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gRenderer = nullptr;
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SDL_Quit();
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}
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struct body {
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int x, y;
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};
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struct food {
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int x, y;
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};
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void loop() {
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Uint32 previous = SDL_GetTicks();
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Uint32 lag = 0;
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srand((unsigned)time(0));
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std::list<body> snake = {{0, 0}, {0, TILE_SIZE}, {0, TILE_SIZE * 2}, {0, TILE_SIZE * 3}};
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food f = {TILE_SIZE*10, TILE_SIZE*10};
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bool alive = true;
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bool quit = false;
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bool reset = false;
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int move = 0;
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SDL_Event e;
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while(!quit){
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if(reset){
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snake = {{0, 0}, {0, TILE_SIZE}, {0, TILE_SIZE * 2}, {0, TILE_SIZE * 3}};
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alive = true;
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reset = false;
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move = 0;
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}
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Uint32 current = SDL_GetTicks();
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Uint32 elapsed = current - previous;
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previous = current;
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lag += elapsed;
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while (SDL_PollEvent(&e)) {
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if (e.type == SDL_QUIT) {
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quit = true;
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}
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if (e.type == SDL_KEYDOWN){
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switch(e.key.keysym.sym) {
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case SDLK_LEFT:
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if(move != 3)
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move = 1;
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break;
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case SDLK_UP:
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if(move != 4)
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move = 2;
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break;
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case SDLK_RIGHT:
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if(move != 1)
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move = 3;
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break;
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case SDLK_DOWN:
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if(move != 2)
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move = 4;
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break;
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case SDLK_r:
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reset = true;
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break;
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case SDLK_MINUS:
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MS_PER_UPDATE += 10;
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break;
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case SDLK_EQUALS:
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MS_PER_UPDATE -= 10;
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if(MS_PER_UPDATE <= 0)
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MS_PER_UPDATE = 10;
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break;
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}
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}
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}
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while(lag >= MS_PER_UPDATE){
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if(alive){
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switch(move){
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case 1:
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snake.push_front({snake.front().x - TILE_SIZE, snake.front().y});
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snake.pop_back();
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break;
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case 2:
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snake.push_front({snake.front().x, snake.front().y - TILE_SIZE});
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snake.pop_back();
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break;
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case 3:
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snake.push_front({snake.front().x + TILE_SIZE, snake.front().y});
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snake.pop_back();
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break;
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case 4:
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snake.push_front({snake.front().x, snake.front().y + TILE_SIZE});
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snake.pop_back();
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break;
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}
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if(snake.front().x > WORLD_WIDTH || snake.front().x < 0){
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alive = false;
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}else if(snake.front().y > WORLD_HEIGHT || snake.front().y < 0){
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alive = false;
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}
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for(std::list<body>::iterator s = snake.begin(); s != snake.end(); s++) {
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if(s != snake.begin() && s->x == snake.front().x && s->y == snake.front().y){
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alive = false;
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break;
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}
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}
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if(snake.front().x == f.x && snake.front().y == f.y){
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snake.push_back({snake.back().x, snake.back().y});
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while(true){
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f.x = (rand() % (WORLD_WIDTH / TILE_SIZE)) * TILE_SIZE;
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f.y = (rand() % (WORLD_HEIGHT / TILE_SIZE)) * TILE_SIZE;
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bool intersects = false;
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for(auto s: snake){
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if(f.x == s.x && f.y == s.y){
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intersects = true;
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}
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}
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if(!intersects)
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break;
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}
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}
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}
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lag -= MS_PER_UPDATE;
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}
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SDL_RenderClear(gRenderer);
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SDL_SetRenderDrawColor(gRenderer, 152, 30, 170, SDL_ALPHA_OPAQUE);
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for(auto s: snake){
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SDL_Rect snake_rect = {s.x, s.y, TILE_SIZE, TILE_SIZE};
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SDL_RenderFillRect(gRenderer, &snake_rect);
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}
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SDL_SetRenderDrawColor(gRenderer, 239, 11, 95, SDL_ALPHA_OPAQUE);
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SDL_Rect food_rect = {f.x, f.y, TILE_SIZE, TILE_SIZE};
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SDL_RenderFillRect(gRenderer, &food_rect);
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SDL_SetRenderDrawColor(gRenderer, 0, 0, 0, SDL_ALPHA_OPAQUE);
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SDL_RenderPresent(gRenderer);
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}
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}
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int main(int argc, char* args[]){
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if(!init()) {
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std::cout << "Init Error: " << std::endl;
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return 1;
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}
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loop();
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close();
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return 0;
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}
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