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pingpong/pingpong.c

554 lines
15 KiB
C
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#include <stdio.h>
#include <time.h>
#include <SDL2/SDL.h>
#include <SDL_ttf.h>
#define TRUE 1
#define FALSE 0
#define WINDOW_WIDTH 800
#define WINDOW_HEIGHT 600
#define FPS 120
#define TARGET_FRAME_TIME (1000 / FPS)
typedef struct {
int is_running;
int last_frame_time;
struct ball {
float x;
float y;
float width;
float height;
float acceleration_x;
float acceleration_y;
} ball;
struct player {
float x;
float y;
float width;
float height;
float acceleration_y;
int score;
int up;
int down;
} player_one, player_two;
} game_state;
/* --------------------------------------------------------------------- */
typedef struct {
float x;
float y;
float vel_x;
float vel_y;
float w;
float h;
float alpha;
} particle;
particle particles[] = {
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
{0, 0, 0, 0, 2, 2, 0},
};
#define PARTICLE_COUNT sizeof(particles) / sizeof(particle)
/* --------------------------------------------------------------------- */
void exit_error(const char *error)
{
fprintf(stderr, "%s\n", error);
exit(1);
}
void initialize_window(SDL_Window **window, SDL_Renderer **renderer)
{
int sdl;
sdl = SDL_Init(SDL_INIT_EVERYTHING);
if(sdl != 0)
exit_error("Error initializing SDL.");
*window = SDL_CreateWindow(
NULL,
SDL_WINDOWPOS_CENTERED, SDL_WINDOWPOS_CENTERED,
WINDOW_WIDTH, WINDOW_HEIGHT,
SDL_WINDOW_SHOWN);
if(!window)
exit_error("Error creating SDL Window.");
*renderer = SDL_CreateRenderer(*window, -1, 0);
if(!renderer)
exit_error("Error creating SDL Renderer.");
}
void initialized_font(TTF_Font **font)
{
int ttf;
ttf = TTF_Init();
if(ttf < 0)
exit_error("Error opening font.");
*font = TTF_OpenFont("./iosevka-bold.ttf", 36);
if(!font)
exit_error("Error opening font.");
}
void handle_ball(game_state *state, float delta_time)
{
if(state->ball.x < state->player_one.x + state->player_one.width &&
(state->ball.y < state->player_one.y + state->player_one.height &&
state->ball.y > state->player_one.y))
{
state->ball.x = state->player_one.x + state->player_one.width;
state->ball.acceleration_x *= -1;
/* TODO: Add particles. */
int i;
for(i = 0; i < (int)(PARTICLE_COUNT); i++) {
particles[i].vel_x = rand() % 61 + 60;
particles[i].vel_y = rand() % 121 - 60;
particles[i].x = state->ball.x;
particles[i].y = state->ball.y;
particles[i].alpha = 255.0f;
}
}
if(state->ball.x + state->ball.width > state->player_two.x &&
(state->ball.y < state->player_two.y + state->player_two.height &&
state->ball.y > state->player_two.y))
{
state->ball.x = state->player_two.x - state->ball.width;
state->ball.acceleration_x *= -1;
/* TODO: Add particles. */
int i;
for(i = 0; i < (int)(PARTICLE_COUNT); i++) {
particles[i].vel_x = -(rand() % 61 + 60);
particles[i].vel_y = rand() % 81 - 40;
particles[i].x = state->ball.x + state->ball.width;
particles[i].y = state->ball.y;
particles[i].alpha = 255.0f;
}
}
if(state->ball.x <= 0) {
state->ball.x = WINDOW_WIDTH / 2;
state->ball.y = 0;
state->player_two.score += 1;
if(state->player_two.score > 5) {
state->player_two.score = 1;
state->player_one.score = 0;
}
}
if(state->ball.x >= WINDOW_WIDTH - state->ball.width) {
state->ball.x = WINDOW_WIDTH / 2;
state->ball.y = 0;
state->player_one.score += 1;
if(state->player_one.score > 5) {
state->player_one.score = 1;
state->player_two.score = 0;
}
}
if(state->ball.y < 0) {
state->ball.acceleration_y *= -1;
state->ball.y = 0;
}
if(state->ball.y > WINDOW_HEIGHT - state->ball.height) {
state->ball.acceleration_y *= -1;
state->ball.y = WINDOW_HEIGHT - state->ball.height;
}
state->ball.x += state->ball.acceleration_x * delta_time;
state->ball.y += state->ball.acceleration_y * delta_time;
}
void handle_paddles(game_state *state, float delta_time)
{
if(state->player_one.up)
state->player_one.y -= state->player_one.acceleration_y * delta_time;
if(state->player_one.down)
state->player_one.y += state->player_one.acceleration_y * delta_time;
if(state->player_two.up)
state->player_two.y -= state->player_one.acceleration_y * delta_time;
if(state->player_two.down)
state->player_two.y += state->player_one.acceleration_y * delta_time;
}
void render_score(game_state *state, SDL_Renderer *renderer, TTF_Font *font)
{
/* Build score strings */
char *score;
score = malloc(3*sizeof(char));
score[0] = (char)(state->player_one.score + 48); /* FIX */
score[1] = ':';
score[2] = (char)(state->player_two.score + 48);
/* Render */
SDL_Surface *text;
SDL_Color color = { 198, 204, 215, 255 };
text = TTF_RenderText_Solid(font, score, color);
if (!text)
exit_error("Error initializing Text.");
SDL_Texture *text_texture;
text_texture = SDL_CreateTextureFromSurface(renderer, text);
SDL_Rect dest = { WINDOW_WIDTH/2-20, 10, text->w, text->h };
SDL_RenderCopy(renderer, text_texture, NULL, &dest);
/* free */
SDL_DestroyTexture(text_texture);
SDL_FreeSurface(text);
free(score);
}
void render_ball(game_state *state, SDL_Renderer *renderer)
{
SDL_Rect ball_rect = { state->ball.x, state->ball.y, state->ball.width,
state->ball.height };
SDL_SetRenderDrawColor(renderer, 198, 204, 215, 255);
SDL_RenderFillRect(renderer, &ball_rect);
}
void render_paddles(game_state *state, SDL_Renderer *renderer)
{
SDL_Rect player_one_rect = { state->player_one.x, state->player_one.y,
state->player_one.width, state->player_one.height };
SDL_Rect player_two_rect = { state->player_two.x, state->player_two.y,
state->player_two.width, state->player_two.height };
SDL_SetRenderDrawColor(renderer, 215, 78, 66, 255);
SDL_RenderFillRect(renderer, &player_one_rect);
SDL_SetRenderDrawColor(renderer, 16, 133, 255, 255);
SDL_RenderFillRect(renderer, &player_two_rect);
}
void setup(game_state *state)
{
state->is_running = TRUE;
state->last_frame_time = 0;
int i;
for(i = 0; i < (int)(PARTICLE_COUNT); i++) {
particles[i].w = rand() % 3 + 1;
particles[i].y = particles[i].w;
}
state->ball.x = 40;
state->ball.y = 40;
state->ball.width = 15;
state->ball.height = 15;
state->ball.acceleration_x = 300;
state->ball.acceleration_y = 400;
state->player_one.x = 10;
state->player_one.y = 10;
state->player_one.width = 10;
state->player_one.height = 100;
state->player_one.acceleration_y = 500;
state->player_one.score = 0;
state->player_one.up = FALSE;
state->player_one.down = FALSE;
state->player_two.x = WINDOW_WIDTH - 20;
state->player_two.y = 10;
state->player_two.width = 10;
state->player_two.height = 100;
state->player_two.acceleration_y = 500;
state->player_two.score = 0;
state->player_two.up = FALSE;
state->player_two.down = FALSE;
}
void process_input(game_state *state)
{
SDL_Event event;
const Uint8 *currentKeyStates;
SDL_PollEvent(&event);
currentKeyStates = SDL_GetKeyboardState(NULL);
if(currentKeyStates[SDL_SCANCODE_W]) {
state->player_one.up = TRUE;
state->player_one.down = FALSE;
} else if(currentKeyStates[SDL_SCANCODE_S]) {
state->player_one.up = FALSE;
state->player_one.down = TRUE;
} else {
state->player_one.up = FALSE;
state->player_one.down = FALSE;
}
if(currentKeyStates[SDL_SCANCODE_UP]) {
state->player_two.up = TRUE;
state->player_two.down = FALSE;
} else if(currentKeyStates[SDL_SCANCODE_DOWN]) {
state->player_two.up = FALSE;
state->player_two.down = TRUE;
} else {
state->player_two.up = FALSE;
state->player_two.down = FALSE;
}
switch(event.type) {
case SDL_QUIT:
state->is_running = FALSE;
break;
case SDL_KEYDOWN:
if(event.key.keysym.sym == SDLK_ESCAPE ||
event.key.keysym.sym == SDLK_q)
{
state->is_running = FALSE;
}
break;
}
}
void update(game_state *state)
{
int time_to_wait;
float delta_time;
int i;
time_to_wait = TARGET_FRAME_TIME - (SDL_GetTicks() - state->last_frame_time);
if(time_to_wait > 0 && time_to_wait <= TARGET_FRAME_TIME)
SDL_Delay(time_to_wait);
delta_time = (SDL_GetTicks() - state->last_frame_time) / 1000.0f;
state->last_frame_time = SDL_GetTicks();
handle_ball(state, delta_time);
handle_paddles(state, delta_time);
for(i = 0; i < (int)(PARTICLE_COUNT); i++) {
particles[i].alpha -= 2.0f;
if(particles[i].alpha < 0.0f)
particles[i].alpha = 0.0f;
particles[i].x += particles[i].vel_x * delta_time;
particles[i].y += particles[i].vel_y * delta_time;
}
}
void render(game_state *state, SDL_Renderer *renderer, TTF_Font *font)
{
SDL_SetRenderDrawColor(renderer, 24, 26, 31, 255);
SDL_RenderClear(renderer);
render_paddles(state, renderer);
render_ball(state, renderer);
render_score(state, renderer, font);
SDL_Rect particle_rect;
int i;
for(i = 0; i < (int)(PARTICLE_COUNT); i++) {
particle_rect.x = particles[i].x;
particle_rect.y = particles[i].y;
particle_rect.w = particles[i].w;
particle_rect.h = particles[i].h;
SDL_SetRenderDrawBlendMode(renderer, SDL_BLENDMODE_BLEND);
SDL_SetRenderDrawColor(renderer, 198, 204, 215, (int)particles[i].alpha);
SDL_RenderFillRect(renderer, &particle_rect);
}
SDL_RenderPresent(renderer);
}
void destroy_window(SDL_Window *window, SDL_Renderer *renderer)
{
SDL_DestroyRenderer(renderer);
SDL_DestroyWindow(window);
SDL_Quit();
}
int main()
{
srand(time(NULL));
game_state state;
SDL_Window *window = NULL;
SDL_Renderer *renderer = NULL;
TTF_Font *font;
initialize_window(&window, &renderer);
initialized_font(&font);
setup(&state);
while(state.is_running) {
process_input(&state);
update(&state);
render(&state, renderer, font);
}
destroy_window(window, renderer);
return 0;
}
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