flappychik

commit 30132ce7542e0bf1cabc8d7ae925edd0c89d0d19
parent 66c8cc71ce87445e32ec68cb214177a5081b2365
Author: bsandro <brian.drosan@gmail.com>
Date:   Tue, 15 Feb 2022 00:58:29 +0200

game_t, sprite_t structs

Diffstat:
M
main.c
 | 
91
+++++++++++++++++++++++++++++++++++++++++++++++--------------------------------

1 file changed, 54 insertions(+), 37 deletions(-)
diff --git a/main.c b/main.c
@@ -14,73 +14,90 @@
 #define FPS 60
 #define SPEED 80 // pixels per second
 
+struct sprite_t {
+	SDL_Texture *texture;
+	SDL_Rect rect;
+	int angle;
+};
+
+struct game_t {
+	bool over;
+	SDL_Window *screen;
+	SDL_Renderer *renderer;
+	uint64_t last_frame;
+	struct sprite_t bg;
+	struct sprite_t ship;
+};
+
 int main(int argc, char *argv[]) {
 	(void)argc;
 	(void)argv;
 
-	bool quit = false;
 	SDL_Event event;
+	struct game_t game = {0};
+	game.over = false;
 
 	SDL_Init(SDL_INIT_VIDEO);
-	SDL_Window *screen = SDL_CreateWindow("flappychik", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, WINDOW_FLAGS);
-
-	assert(screen != NULL);
 
-	SDL_Renderer *renderer = SDL_CreateRenderer(screen, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
-	assert(renderer != NULL);
+	game.screen = SDL_CreateWindow("flappychik", SDL_WINDOWPOS_UNDEFINED, SDL_WINDOWPOS_UNDEFINED, 640, 480, WINDOW_FLAGS);
+	assert(game.screen != NULL);
+	game.renderer = SDL_CreateRenderer(game.screen, -1, SDL_RENDERER_ACCELERATED | SDL_RENDERER_PRESENTVSYNC);
+	assert(game.renderer != NULL);
 
-	SDL_Surface *bg = IMG_Load("assets/kohina.jpg");
-	assert(bg != NULL);
+	SDL_Surface *bg_img = IMG_Load("assets/kohina.jpg");
+	assert(bg_img != NULL);
+	SDL_Surface *knife_img = IMG_Load("assets/chikaiKnife.png"); // 56x56px
+	assert(knife_img != NULL);
 
-	SDL_Surface *knife = IMG_Load("assets/chikaiKnife.png"); // 56x56px
-	assert(knife != NULL);
+	game.bg.texture = SDL_CreateTextureFromSurface(game.renderer, bg_img);
+	assert(game.bg.texture != NULL);
+	game.ship.texture = SDL_CreateTextureFromSurface(game.renderer, knife_img);
+	assert(game.ship.texture != NULL);
 
-	SDL_Texture *tex_bg = SDL_CreateTextureFromSurface(renderer, bg);
-	SDL_Texture *tex_knife = SDL_CreateTextureFromSurface(renderer, knife);
-	SDL_FreeSurface(knife);
-	SDL_FreeSurface(bg);
+	SDL_FreeSurface(knife_img);
+	SDL_FreeSurface(bg_img);
 
-	SDL_RenderCopy(renderer, tex_bg, NULL, NULL);
-	SDL_Rect knife_rect = {0, 0, 56, 56};
-	int knife_angle = 0;
-	SDL_RenderCopy(renderer, tex_knife, NULL, &knife_rect);
+	game.ship.rect.w = 56;
+	game.ship.rect.h = 56;
+	game.ship.angle = 0;
 
-	SDL_RenderPresent(renderer);
+	SDL_RenderPresent(game.renderer);
 
-	uint64_t t = SDL_GetTicks64();
-	while (!quit) {
+	game.last_frame = SDL_GetTicks64();
+	while (!game.over) {
 		while (SDL_PollEvent(&event)) {
 			switch (event.type) {
 			case SDL_QUIT:
-				quit = true;
+				game.over = true;
 				break;
 			}
 		}
 
-		uint64_t t1 = SDL_GetTicks64();
+		uint64_t t = SDL_GetTicks64();
+		uint64_t ftime = t - game.last_frame;
 
-		if (t1 - t >= 1000/FPS) {
-			SDL_RenderClear(renderer);
-			uint64_t ftime = t1 - t;
+		if (ftime >= 1000/FPS) {
 			int offset = round(ftime * SPEED / 1000.0f);
 			printf("offset: %d\n", offset);
 
-			knife_rect.x += offset;
-			knife_rect.y += offset;
-			knife_angle += 1;
-			knife_angle %= 360;
-			SDL_RenderCopy(renderer, tex_bg, NULL, NULL);
-			SDL_RenderCopyEx(renderer, tex_knife, NULL, &knife_rect, knife_angle, NULL, SDL_FLIP_NONE);
-			SDL_RenderPresent(renderer);
+			game.ship.rect.x += offset;
+			game.ship.rect.y += offset;
+			game.ship.angle = ++game.ship.angle % 360;
+
+			SDL_RenderClear(game.renderer);
+			SDL_RenderCopy(game.renderer, game.bg.texture, NULL, NULL);
+			SDL_RenderCopyEx(game.renderer, game.ship.texture, NULL, &game.ship.rect, game.ship.angle, NULL, SDL_FLIP_NONE);
+			SDL_RenderPresent(game.renderer);
 
 			printf("frame time: %llu\n", ftime);
-			t = t1;
+			game.last_frame = t;
 		}
 	}
 
-	SDL_DestroyTexture(tex_bg);
-	SDL_DestroyRenderer(renderer);
-	SDL_DestroyWindow(screen);
+	SDL_DestroyTexture(game.bg.texture);
+	SDL_DestroyTexture(game.ship.texture);
+	SDL_DestroyRenderer(game.renderer);
+	SDL_DestroyWindow(game.screen);
 	SDL_Quit();
 
 	printf("bye!\n");