Add simple particle system. Finish next time.
This commit is contained in:
302
pingpong.c
302
pingpong.c
@@ -1,4 +1,5 @@
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#include <stdio.h>
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#include <time.h>
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#include <SDL2/SDL.h>
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#include <SDL_ttf.h>
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@@ -11,7 +12,7 @@
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#define FPS 120
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#define TARGET_FRAME_TIME (1000 / FPS)
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typedef struct game_state {
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typedef struct {
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int is_running;
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int last_frame_time;
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@@ -36,42 +37,222 @@ typedef struct game_state {
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} player_one, player_two;
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} game_state;
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void initialize_window(SDL_Window **window, SDL_Renderer **renderer)
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/* --------------------------------------------------------------------- */
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typedef struct {
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float x;
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float y;
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float vel_x;
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float vel_y;
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float w;
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float h;
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float alpha;
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} particle;
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particle particles[] = {
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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{0, 0, 0, 0, 2, 2, 0},
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};
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#define PARTICLE_COUNT sizeof(particles) / sizeof(particle)
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/* --------------------------------------------------------------------- */
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void exit_error(const char *error)
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{
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if(SDL_Init(SDL_INIT_EVERYTHING) != 0) {
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fprintf(stderr, "Error initializing SDL.\n");
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fprintf(stderr, "%s\n", error);
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exit(1);
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}
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void initialize_window(SDL_Window **window, SDL_Renderer **renderer)
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{
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int sdl;
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sdl = SDL_Init(SDL_INIT_EVERYTHING);
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if(sdl != 0)
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exit_error("Error initializing SDL.");
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*window = SDL_CreateWindow(
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NULL,
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SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
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WINDOW_WIDTH, WINDOW_HEIGHT,
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SDL_WINDOW_SHOWN);
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if(!window) {
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fprintf(stderr, "Error creating SDL Window.\n");
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exit(1);
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}
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if(!window)
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exit_error("Error creating SDL Window.");
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*renderer = SDL_CreateRenderer(*window, -1, 0);
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if(!renderer) {
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fprintf(stderr, "Error creating SDL Renderer.\n");
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exit(1);
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}
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if(!renderer)
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exit_error("Error creating SDL Renderer.");
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}
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void initialized_font(TTF_Font **font)
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{
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if(TTF_Init() < 0) {
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fprintf(stderr, "Error opening font.\n");
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exit(1);
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}
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int ttf;
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ttf = TTF_Init();
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if(ttf < 0)
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exit_error("Error opening font.");
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*font = TTF_OpenFont("./iosevka-bold.ttf", 36);
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if(!font) {
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fprintf(stderr, "Error opening font.\n");
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exit(1);
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}
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if(!font)
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exit_error("Error opening font.");
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}
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void handle_ball(game_state *state, float delta_time)
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@@ -82,6 +263,17 @@ void handle_ball(game_state *state, float delta_time)
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{
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state->ball.x = state->player_one.x + state->player_one.width;
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state->ball.acceleration_x *= -1;
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/* TODO: Add particles. */
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int i;
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for(i = 0; i < (int)(PARTICLE_COUNT); i++) {
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particles[i].vel_x = rand() % 61 + 60;
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particles[i].vel_y = rand() % 121 - 60;
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particles[i].x = state->ball.x;
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particles[i].y = state->ball.y;
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particles[i].alpha = 255.0f;
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}
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}
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if(state->ball.x + state->ball.width > state->player_two.x &&
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@@ -90,6 +282,17 @@ void handle_ball(game_state *state, float delta_time)
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{
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state->ball.x = state->player_two.x - state->ball.width;
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state->ball.acceleration_x *= -1;
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/* TODO: Add particles. */
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int i;
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for(i = 0; i < (int)(PARTICLE_COUNT); i++) {
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particles[i].vel_x = -(rand() % 61 + 60);
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particles[i].vel_y = rand() % 81 - 40;
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particles[i].x = state->ball.x + state->ball.width;
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particles[i].y = state->ball.y;
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particles[i].alpha = 255.0f;
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}
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}
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if(state->ball.x <= 0) {
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@@ -149,10 +352,9 @@ void render_score(game_state *state, SDL_Renderer *renderer, TTF_Font *font)
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SDL_Surface *text;
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SDL_Color color = { 198, 204, 215, 255 };
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text = TTF_RenderText_Solid(font, score, color);
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if (!text) {
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fprintf(stderr, "Error initializing Text.\n");
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exit(1);
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}
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if (!text)
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exit_error("Error initializing Text.");
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SDL_Texture *text_texture;
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text_texture = SDL_CreateTextureFromSurface(renderer, text);
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SDL_Rect dest = { WINDOW_WIDTH/2-20, 10, text->w, text->h };
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@@ -164,6 +366,14 @@ void render_score(game_state *state, SDL_Renderer *renderer, TTF_Font *font)
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free(score);
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}
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void render_ball(game_state *state, SDL_Renderer *renderer)
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{
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SDL_Rect ball_rect = { state->ball.x, state->ball.y, state->ball.width,
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state->ball.height };
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SDL_SetRenderDrawColor(renderer, 198, 204, 215, 255);
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SDL_RenderFillRect(renderer, &ball_rect);
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}
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void render_paddles(game_state *state, SDL_Renderer *renderer)
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{
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SDL_Rect player_one_rect = { state->player_one.x, state->player_one.y,
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@@ -178,19 +388,17 @@ void render_paddles(game_state *state, SDL_Renderer *renderer)
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SDL_RenderFillRect(renderer, &player_two_rect);
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}
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void render_ball(game_state *state, SDL_Renderer *renderer)
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{
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SDL_Rect ball_rect = { state->ball.x, state->ball.y, state->ball.width,
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state->ball.height };
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SDL_SetRenderDrawColor(renderer, 198, 204, 215, 255);
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SDL_RenderFillRect(renderer, &ball_rect);
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}
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void setup(game_state *state)
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{
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state->is_running = TRUE;
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state->last_frame_time = 0;
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int i;
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for(i = 0; i < (int)(PARTICLE_COUNT); i++) {
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particles[i].w = rand() % 3 + 1;
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particles[i].y = particles[i].w;
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}
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state->ball.x = 40;
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state->ball.y = 40;
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state->ball.width = 15;
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@@ -251,8 +459,11 @@ void process_input(game_state *state)
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state->is_running = FALSE;
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break;
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case SDL_KEYDOWN:
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if(event.key.keysym.sym == SDLK_ESCAPE)
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if(event.key.keysym.sym == SDLK_ESCAPE ||
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event.key.keysym.sym == SDLK_q)
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{
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state->is_running = FALSE;
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}
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break;
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}
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}
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@@ -261,6 +472,7 @@ void update(game_state *state)
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{
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int time_to_wait;
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float delta_time;
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int i;
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time_to_wait = TARGET_FRAME_TIME - (SDL_GetTicks() - state->last_frame_time);
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@@ -273,6 +485,15 @@ void update(game_state *state)
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handle_ball(state, delta_time);
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handle_paddles(state, delta_time);
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for(i = 0; i < (int)(PARTICLE_COUNT); i++) {
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particles[i].alpha -= 2.0f;
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if(particles[i].alpha < 0.0f)
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particles[i].alpha = 0.0f;
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particles[i].x += particles[i].vel_x * delta_time;
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particles[i].y += particles[i].vel_y * delta_time;
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}
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}
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void render(game_state *state, SDL_Renderer *renderer, TTF_Font *font)
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@@ -284,6 +505,19 @@ void render(game_state *state, SDL_Renderer *renderer, TTF_Font *font)
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render_ball(state, renderer);
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render_score(state, renderer, font);
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SDL_Rect particle_rect;
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int i;
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for(i = 0; i < (int)(PARTICLE_COUNT); i++) {
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particle_rect.x = particles[i].x;
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particle_rect.y = particles[i].y;
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particle_rect.w = particles[i].w;
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particle_rect.h = particles[i].h;
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SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
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SDL_SetRenderDrawColor(renderer, 198, 204, 215, (int)particles[i].alpha);
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SDL_RenderFillRect(renderer, &particle_rect);
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}
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SDL_RenderPresent(renderer);
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}
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@@ -296,6 +530,8 @@ void destroy_window(SDL_Window *window, SDL_Renderer *renderer)
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int main()
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{
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||||
srand(time(NULL));
|
||||
|
||||
game_state state;
|
||||
SDL_Window *window = NULL;
|
||||
SDL_Renderer *renderer = NULL;
|
||||
|
||||
Reference in New Issue
Block a user