commit 7a4a9794b47f4f274bfd96e818bc12559734c412 Author: NetherEran Date: Wed Dec 11 12:17:21 2019 +0100 made good use of git's capabilities by commiting everything at once diff --git a/LICENSE.txt b/LICENSE.txt new file mode 100755 index 0000000..d9deb58 --- /dev/null +++ b/LICENSE.txt @@ -0,0 +1,696 @@ +License of Snek vs Snacc +====================== + +Copyright Ⓒ 2019 NetherEran. + +License of source code +---------------------- +This program is free software: you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation, either version 3 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. 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If not, see . + +Also add information on how to contact you by electronic and paper mail. + + If the program does terminal interaction, make it output a short +notice like this when it starts in an interactive mode: + + Copyright (C) + This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. + This is free software, and you are welcome to redistribute it + under certain conditions; type `show c' for details. + +The hypothetical commands `show w' and `show c' should show the appropriate +parts of the General Public License. Of course, your program's commands +might be different; for a GUI interface, you would use an "about box". + + You should also get your employer (if you work as a programmer) or school, +if any, to sign a "copyright disclaimer" for the program, if necessary. +For more information on this, and how to apply and follow the GNU GPL, see +. + + The GNU General Public License does not permit incorporating your program +into proprietary programs. If your program is a subroutine library, you +may consider it more useful to permit linking proprietary applications with +the library. If this is what you want to do, use the GNU Lesser General +Public License instead of this License. But first, please read +. diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..d190d1b --- /dev/null +++ b/Makefile @@ -0,0 +1,20 @@ +snek : main.o field.o ball.o player.o game.o + gcc -o snek main.o field.o ball.o player.o game.o -lncurses -lm + +main.o : main.c + gcc -Wall -c main.c + +ball.o : ball.c + gcc -Wall -c ball.c + +field.o : field.c + gcc -Wall -c field.c + +player.o : player.c + gcc -Wall -c player.c + +game.o : game.c + gcc -Wall -c game.c + +clean: + rm main.o field.o ball.o snek player.o game.o diff --git a/README.md b/README.md new file mode 100644 index 0000000..fdb878a --- /dev/null +++ b/README.md @@ -0,0 +1,13 @@ +# Snek vs Snacc + +Copyright (C) NetherEran 2019 GPLv3 + +A snake game for the command line but instead of the snake getting longer the snack moves. + +# Compiling + +* install ncurses +* make + +Start with ./snek + diff --git a/ball.c b/ball.c new file mode 100644 index 0000000..81b1c74 --- /dev/null +++ b/ball.c @@ -0,0 +1,114 @@ +#include +#include +#include +#include "game.h" +#include "ball.h" +#include "player.h" + + +void init_ball(BALL* b, int x, int y, char dir, int value) { + b -> position.x = x; + b -> position.y = y; + b -> direction = dir; + b -> value = value; + b -> color = value + 2; + b -> move_tick = 0; +} + + +//MOVEMENT STUFF + +int is_ball_passable(FIELD* f, POINT* p) { + //TODO: take obstacles into account + return p -> x > 0 && + p -> x < f -> width - 1 && + p -> y > 0 && + p -> y < f -> height - 1; +} + +void add_to_point(POINT* p1, POINT* p2) { + p1 -> x = p1 -> x + p2 -> x; + p1 -> y = p1 -> y + p2 -> y; +} + +void direction_to_point(POINT* p, char dir) { + if(dir & 0x0010) { + p -> x = 1; + } else { + p -> x = -1; + } + if(dir & 0x0001) { + p -> y = 1; + } else { + p -> y = -1; + } +} +char point_to_direction(POINT* p) { + assert((p -> x == 1 || p -> x == -1) && (p -> y == 1 || p -> y == -1)); + char dir = 0; + dir = dir | (p -> x == 1 ? 0x10 : 0); + dir = dir | (p -> y == 1 ? 0x1 : 0); + return dir; +} + +void bounce(BALL* b, FIELD* f) { + POINT* pos = &(b -> position); + POINT dir; + + //check if y is obstructed + direction_to_point(&dir, b -> direction); + dir.x = 0; + add_to_point(&dir, pos); + int invertY = !is_ball_passable(f, &dir); + + //check if x is obstructed + direction_to_point(&dir, b -> direction); + dir.y = 0; + add_to_point(&dir, pos); + int invertX = !is_ball_passable(f, &dir); + + //invert direction away from obstruction + direction_to_point(&dir, b -> direction); + dir.x = invertX ? -dir.x : dir.x; + dir.y = invertY ? -dir.y : dir.y; + b -> direction = point_to_direction(&dir); +} + +void move_ball(FIELD* f, int i) { + BALL* b = f -> balls[i]; + POINT* pos = &b -> position; + POINT direction_vector; + direction_to_point(&direction_vector, b -> direction); + add_to_point(&direction_vector, pos); + + bounce(b, f); + + if (is_ball_passable(f, &direction_vector)) { + b -> position = direction_vector; + } else { + + direction_to_point(&direction_vector, b -> direction); + add_to_point(&direction_vector, pos); + b -> position = direction_vector; + } + if (is_on_player(f -> player, &b -> position)) { + if (f -> player -> body[f -> player -> head_ptr] -> x == pos -> x && + f -> player -> body[f -> player -> head_ptr] -> y == pos -> y) { + + eat_ball(f, i); + } else { + set_lost(f -> state); + } + } +} + +void move_balls(FIELD* f) { + for (int i = 0; i < f -> ball_count; i++) { + BALL* b = f -> balls[i]; + b -> move_tick += (b -> value * b -> value); + if (b -> move_tick > 17) { + b -> move_tick = 0; + move_ball(f, i); + } + } +} diff --git a/ball.h b/ball.h new file mode 100644 index 0000000..70001ab --- /dev/null +++ b/ball.h @@ -0,0 +1,9 @@ +#ifndef _BALL_H_ +#define _BALL_H_ + + +void move_balls(FIELD* f); +void init_ball(BALL* b, int x, int y, char dir, int value); + + +#endif diff --git a/field.c b/field.c new file mode 100644 index 0000000..621a274 --- /dev/null +++ b/field.c @@ -0,0 +1,98 @@ +#include +#include +#include +#include "game.h" +#include "ball.h" +#include "player.h" +#include "field.h" + + + +void add_ball(FIELD* f, int max_value) { + POINT* playerhead = f -> player -> body[f -> player -> head_ptr]; + BALL* b = malloc(sizeof(BALL)); + + //find a value + int value = (random() % max_value) + 1; + + //get random position that's at least 10 away from the player's head + int x; + int y; + int dir = random() % 4; + do { + x = (random() % (f -> width - 2)) + 1; + y = (random() % (f -> height - 2)) + 1; + + } while (sqrt((double)((x - playerhead -> x) * (x - playerhead -> x) + + (y - playerhead -> y) * (y - playerhead -> y))) < (double) (13 + value)); + + init_ball(b, x, y, dir, value); + f -> ball_count++; + + + //if ball buffer is too small, double it + if (f -> ball_count >= f -> max_allocated_balls) { + f -> max_allocated_balls *= 2; + f -> balls = realloc(f -> balls, f -> max_allocated_balls); + } + f -> balls[f -> ball_count - 1] = b; +} + +void init_field(FIELD* f, int width, int height, GAME_STATE* state) { + f -> state = state; + f -> win = subwin(stdscr, height, 2 * width, 0, 0); + f -> width = width; + f -> height = height; + f -> max_allocated_balls = 1; + f -> balls = malloc(sizeof(BALL) * f -> max_allocated_balls); + f -> ball_count = 0; + f -> player = malloc(sizeof(PLAYER)); +} + +void destroy_field(FIELD* f) { + destroy_player(f -> player); + for (int i = 0; i < f -> ball_count; i++) { + free(f -> balls[i]); + } + + free(f -> balls); + free(f); +} + + +void draw_outline(FIELD* f) { + wattrset(f -> win, COLOR_PAIR(1)); + for (int i = 0; i < f -> width * 2 - 1; i++) { + mvwprintw(f -> win, 0, i , " "); + mvwprintw(f -> win, f -> height - 1, i , " "); + } + for (int i = 1; i < f -> height - 1; i++) { + mvwprintw(f -> win, i, 0 , " "); + mvwprintw(f -> win, i, f -> width * 2 - 2, " "); + } +} + + +void draw_player(FIELD* f) { + wattrset(f -> win, COLOR_PAIR(2)); + PLAYER* player = f -> player; + POINT* p; + for (int i = 0; i < player -> length; i++) { + p = player -> body[i]; + mvwprintw(f -> win, p -> y, p -> x * 2, " "); + } +} + +void redraw_field(FIELD* f) { + clear(); + wattrset(f -> win, COLOR_PAIR(1)); + draw_outline(f); + + for (int i = 0; i < f -> ball_count; i++) { + BALL* b = f -> balls[i]; + wattrset(f -> win, COLOR_PAIR(b -> color)); + mvwprintw(f -> win, b -> position.y, b -> position.x * 2, " "); + } + draw_player(f); + wrefresh(f -> win); +} diff --git a/field.h b/field.h new file mode 100644 index 0000000..48a0d46 --- /dev/null +++ b/field.h @@ -0,0 +1,10 @@ +#ifndef _FIELD_H_ +#define _FIELD_H_ + +void redraw_field(FIELD* f); +void init_field(FIELD* f, int width, int height, GAME_STATE* state); +void add_ball(FIELD* f, int max_value); +void destroy_field(FIELD* f); + + +#endif diff --git a/game.c b/game.c new file mode 100644 index 0000000..589a8c7 --- /dev/null +++ b/game.c @@ -0,0 +1,92 @@ +#include +#include +#include +#include +#include +#include "game.h" +#include "field.h" +#include "ball.h" +#include "player.h" + + + +void set_lost(GAME_STATE* state) { + state -> status = 2; +} + +void set_won(GAME_STATE* state) { + state -> status = 1; +} + +void eat_ball(FIELD* field, int pos) { + //increase points + field -> state -> points += + field -> balls[pos] -> value * field -> balls[pos] -> value; + + //delete ball + free(field -> balls[pos]); + field -> ball_count--; + for (int i = pos; i < field -> ball_count; i++) { + field[i] = field[i + 1]; + } + int maxval = log((double) field -> state -> points) * 2 + 1; + + //add new ball + add_ball(field, maxval > 4 ? 4 : maxval); +} + +void play_game(GAME_STATE* state) { + state -> points = 0; + state -> status = 0; + + FIELD* f = malloc(sizeof(FIELD)); + init_field(f, 40, 20, state); + init_player(f -> player , f -> width / 2, f -> height / 2); + add_ball(f, 1); + + + redraw_field(f); + + fd_set inputs, test_fds; + struct timeval timeout; + timeout.tv_sec = 0; + timeout.tv_usec = 50000; + FD_ZERO(&inputs); + FD_SET(0, &inputs); + + int redraw = 0; + char player_tick = 0; + while(1) { + if (state -> status) { + destroy_field(f); + return; + } + + + handle_control(f -> player); + + test_fds = inputs; + + int sel_ret = select(FD_SETSIZE, &test_fds, (fd_set *) 0, (fd_set *) 0, &timeout); + + redraw = 0; + if (sel_ret == 0) { + player_tick = (player_tick + 1) % 3; + redraw = 1; + move_balls(f); + + if (!player_tick) { + move_player(f); + redraw = 1; + } + timeout.tv_sec = 0; + timeout.tv_usec = 50000; + } + + if (redraw) { + redraw_field(f); + } + } + + free(f); +} diff --git a/game.h b/game.h new file mode 100644 index 0000000..941e0b6 --- /dev/null +++ b/game.h @@ -0,0 +1,55 @@ +#ifndef _GAME_H_ +#define _GAME_H_ + + +typedef struct { + int x; + int y; +} POINT; + +typedef struct { + char direction; + POINT position; + int value; + char color; + int move_tick; +} BALL; + +typedef struct { + int head_dir_x; + int head_dir_y; + + int next_head_dir_x; + int next_head_dir_y; + + POINT** body; + int head_ptr; + int length; + +} PLAYER; + +typedef struct { + int points; + int status; +} GAME_STATE; + +typedef struct { + int width; + int height; + BALL** balls; + int ball_count; + int max_allocated_balls; + WINDOW* win; + PLAYER* player; + GAME_STATE* state; +} FIELD; + + + +extern GAME_STATE* state; + +void set_lost(GAME_STATE* state); +void set_won(GAME_STATE* state); +void eat_ball(FIELD* field, int pos); +void play_game(GAME_STATE* state); +#endif diff --git a/main.c b/main.c new file mode 100644 index 0000000..eb06b27 --- /dev/null +++ b/main.c @@ -0,0 +1,44 @@ +#include +#include +#include +#include +#include +#include "game.h" + + + + + + +int main(int argc, char** argv) { + initscr(); + start_color(); + + init_pair(1, COLOR_WHITE, COLOR_WHITE); + init_pair(2, COLOR_WHITE, COLOR_CYAN); + init_pair(3, COLOR_WHITE, COLOR_MAGENTA); + init_pair(4, COLOR_WHITE, COLOR_RED); + init_pair(5, COLOR_WHITE, COLOR_BLUE); + init_pair(6, COLOR_WHITE, COLOR_YELLOW); + + srandom(time( (time_t *) 0 )); + + keypad(stdscr, TRUE); + nodelay(stdscr, TRUE); + noecho(); + cbreak(); + curs_set(0); + + GAME_STATE* state = malloc(sizeof(GAME_STATE)); + + play_game(state); + + endwin(); + + printf("GAME OVER! POINTS: %d\n", state -> points); + + free(state); + + + return 0; +} diff --git a/player.c b/player.c new file mode 100644 index 0000000..2191d95 --- /dev/null +++ b/player.c @@ -0,0 +1,129 @@ +#include +#include +#include +#include "game.h" +#include "player.h" + + + + + +void init_player(PLAYER* player, int x, int y) { + player -> head_dir_x = 1; + player -> head_dir_y = 0; + + player -> next_head_dir_x = 1; + player -> next_head_dir_y = 0; + + player -> length = 6; + player -> head_ptr = player -> length - 1; + player -> body = malloc(sizeof(POINT*) * player -> length); + + for (int i = 0; i < player -> length; i++) { + POINT* pt = malloc(sizeof(POINT)); + pt -> x = x + i; + pt -> y = y; + player -> body[i] = pt; + } +} + +void destroy_player(PLAYER* player) { + for (int i = 0; i < player -> length; i++) { + free(player -> body[i]); + } + free(player -> body); + free(player); +} + + +int bit_self(PLAYER* player, POINT* head_pos) { + for (int i = 0; i < player -> length; i++) { + if (player -> body[i] != head_pos && + player -> body[i] -> x == head_pos -> x && + player -> body[i] -> y == head_pos -> y) { + + return 1; + } + } + return 0; +} + +int hit_head(FIELD* field, POINT* head) { + return head -> x == 0 || + head -> y == 0 || + head -> x == field -> width - 1 || + head -> y == field -> height - 1; +} + + +void move_player(FIELD* field) { + PLAYER* player = field -> player; + + player -> head_dir_x = player -> next_head_dir_x; + player -> head_dir_y = player -> next_head_dir_y; + + POINT* oldhead = player -> body[player -> head_ptr]; + player -> head_ptr = (player -> head_ptr + 1) % player -> length; + free(player -> body[player -> head_ptr]); + POINT* newhead = malloc(sizeof(POINT)); + newhead -> x = oldhead -> x + player -> head_dir_x; + newhead -> y = oldhead -> y + player -> head_dir_y; + + for (int i = 0; i < field -> ball_count; i++) { + if (field -> balls[i] -> position.x == newhead -> x && + field -> balls[i] -> position.y == newhead -> y) { + eat_ball(field, i); + } + } + + player -> body[player -> head_ptr] = newhead; + if (bit_self(player, newhead) || + hit_head(field, newhead)) { + + set_lost(field -> state); + } + +} + +void handle_control(PLAYER* player) { + int ch = getch(); + switch(ch) { + case CTRL_LEFT: + if (player -> head_dir_x != 1) { + player -> next_head_dir_x = -1; + player -> next_head_dir_y = 0; + } + break; + case CTRL_RIGHT: + if (player -> head_dir_x != -1) { + player -> next_head_dir_x = 1; + player -> next_head_dir_y = 0; + } + break; + case CTRL_UP: + if (player -> head_dir_y != 1) { + player -> next_head_dir_x = 0; + player -> next_head_dir_y = -1; + } + break; + case CTRL_DOWN: + if (player -> head_dir_y != -1) { + player -> next_head_dir_x = 0; + player -> next_head_dir_y = 1; + } + break; + default: + break; + } +} + +int is_on_player(PLAYER* player, POINT* point) { + for (int i = 0; i < player -> length; i++) { + if (player -> body[i] -> x == point -> x && + player -> body[i] -> y == point -> y) { + + return 1; + } + } + return 0; +} diff --git a/player.h b/player.h new file mode 100644 index 0000000..7b068e4 --- /dev/null +++ b/player.h @@ -0,0 +1,17 @@ +#ifndef _PLAYER_H_ +#define _PLAYER_H_ + + +#define CTRL_LEFT KEY_LEFT +#define CTRL_RIGHT KEY_RIGHT +#define CTRL_UP KEY_UP +#define CTRL_DOWN KEY_DOWN + + +void init_player(PLAYER* player, int x, int y); +void handle_control(PLAYER* player); +void move_player(FIELD* f); +void destroy_player(PLAYER* player); +int is_on_player(PLAYER* player, POINT* point); + +#endif