SDL飞机大战template

// main.cpp - Plane Battle Alpha final project main entry // Written by Zhen Sun #include "SDL.h" #include "SDL_image.h" #include <string> //#include "Display.h" #include "PPlane.h" #include "Timer.h" #include "PBullet.h" // The screen attributes #define SCREEN_WIDTH 310 #define SCREEN_HEIGHT 640 #define SCREEN_BPP 32 #define CAPTION "Plane Battle Game" // The frame rate #define FRAMES_PER_SECOND 20 // The surfaces SDL_Surface *pPlane = NULL; SDL_Surface *pBullet = NULL; SDL_Surface *screen = NULL; // The event structure SDL_Event event; SDL_Surface *load_image(std::string filename) { // The image that's loaded SDL_Surface* loadedImage = NULL; // The optimized surface that will be used SDL_Surface* optimizedImage = NULL; // Load the image loadedImage = IMG_Load(filename.c_str()); // If the image loaded if (loadedImage != NULL) { // Create an optimized surface optimizedImage = SDL_DisplayFormat(loadedImage); // Free the old surface SDL_FreeSurface(loadedImage); // If the surfaced was optimized if (optimizedImage != NULL) { // Color key surface SDL_SetColorKey(optimizedImage, SDL_SRCCOLORKEY, SDL_MapRGB(optimizedImage->format, 0, 0xFF, 0xFF)); } } // Return the optimized surface return optimizedImage; } void apply_surface (int x, int y, SDL_Surface* source, SDL_Surface* destination, SDL_Rect* clip = NULL) { // Holds offsets SDL_Rect offset; // Get offsets offset.x = x; offset.y = y; // Blit SDL_BlitSurface (source, clip, destination, &offset); } bool init() { // Initialize all SDL substems if (SDL_Init (SDL_INIT_EVERYTHING) == -1) { return false; } // Set up the screen screen = SDL_SetVideoMode (SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_BPP, SDL_SWSURFACE); // If there was an error in setting up the screen if (screen == NULL) { return false; } // Set the window caption SDL_WM_SetCaption(CAPTION, NULL); // If everything initialized fine return true; } void load_files(SDL_Surface *surfaceToLoad, std::string fileName) { // Load the PPlane image surfaceToLoad = load_image(fileName); // If there was a problem in loading the PPlane if (surfaceToLoad == NULL) system("pause"); // If everything loaded fine // Doing Nothing } void clean_up() { // Free the surface SDL_FreeSurface(pPlane); SDL_FreeSurface(pBullet); // Quit SDL SDL_Quit(); } // Main function int main(int argc, char* args[]) { // Quit flag bool quit = false; // The PPlane the will be used PPlane myPlane; PBullet myBullet; // The frame rate regulator Timer fps; // Initialize if (init() == false) { return 1; } // Load the files pPlane = load_image("Player's Plane.bmp"); pBullet = load_image("Player's Bullet.bmp"); //load_files(pPlane, "Player's Plane.bmp"); //load_files(pBullet, "Player's Bullet.bmp"); // While the user hasn't quit while (quit == false) { // Start the frame timer fps.start(); // While there's event to handls while(SDL_PollEvent(&myPlane.event)) { // Handle events for the PPlane myPlane.handle_input(); // If the user has Xed out the window if (myPlane.event.type == SDL_QUIT) { // Quit the program quit = true; } } // Move the PPlane myPlane.move(); myBullet.move(); // Fill the screen white SDL_FillRect(screen, &screen->clip_rect, SDL_MapRGB(screen->format, 0xFF, 0xFF, 0xFF)); // Show the PPlane on the screen apply_surface(myPlane.x, myPlane.y, pPlane, screen); apply_surface(myBullet.x, myBullet.y, pBullet, screen); // Clean up the bullet if it goes out of the screen if (myBullet.y <= 0) { SDL_FreeSurface(pBullet); } // Update the screen if (SDL_Flip(screen) == -1) { return 1; } // Cap the frame rate if (fps.get_ticks() < 1000 / FRAMES_PER_SECOND) { SDL_Delay((1000 / FRAMES_PER_SECOND) - fps.get_ticks()); } } // Clean up clean_up(); return 0; }