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Removing FAP files (use FlipC or Official store!)

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Applications/Official/source-OLDER/xMasterX/flipper-asteroids/LICENSE
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Copyright (c) 2022-2023 Salvatore Sanfilippo <antirez at gmail dot com>
All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice,
this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice,
this list of conditions and the following disclaimer in the documentation
and/or other materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
Applications/Official/source-OLDER/xMasterX/flipper-asteroids/README.md
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This is an implementation of the classic Asteroids game for the [Flipper Zero](https://flipperzero.one/). Inside you will find a simple 2D engine that can be reused to implement other games. Note: This one is SimplyMinimal's fork of Antirez's version with several modifications.
# What's New
* Auto rapid fire (less wear on the buttons this way too)
* Up button applies thrusters
* Haptic feedback and LED effects
* High Score system
* Automatic save and load of high score
* Some modifications to certain game play elements
## What's coming next
* Settings screen
* Enabling sound effects (configurable on/off option)
* Power Ups
---
This is a screenshot, but the game looks a lot better in the device itself:
![Asteroids for Flipper Zero screenshot](/images/Asteroids.jpg)
# Controls:
* Left/Right: rotate ship in the two directions.
* Ok, short press: Short burst bullets
* Ok, long press: Auto-fire bullets
* Up: Accelerate
* Down: Decelerate
* Back (Long Press): Exit game. It will automatically save the high scoore too.
Your high scores will automatically be saved. Go forth and compete!
---
## Installing the binary file (no build needed)
Go to the releases and drop the `asteroids.fap` file into the
following Flipper Zero location:
/ext/apps/Games
The `ext` part means that we are in the SD card. So if you don't want
to use the Android (or other) application to upload the file,
you can just take out the SD card, insert it in your computer,
copy the fine into `apps/Games`, and that's it.
## Installing the app from source
* Download the Flipper Zero dev kit and build it:
```
mkdir -p ~/flipperZero/official/
cd ~/flipperZero/official/
git clone --recursive https://github.com/flipperdevices/flipperzero-firmware.git ./
./fbt
```
* Copy this application folder in `official/application_user`.
* Connect your Flipper via USB.
* Build and install with: `./fbt launch_app APPSRC=asteroids`.
## License
BSD licensed. Enjoy.
Applications/Official/source-OLDER/xMasterX/flipper-asteroids/app.c
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/* Copyright (C) 2023 Salvatore Sanfilippo -- All Rights Reserved
* See the LICENSE file for information about the license. */
#include <furi.h>
#include <furi_hal.h>
#include <storage/storage.h>
#include <input/input.h>
#include <gui/gui.h>
#include <stdlib.h>
#include <gui/gui.h>
#include <gui/view_dispatcher.h>
#include <gui/scene_manager.h>
#include <math.h>
#include <notification/notification.h>
#include <notification/notification_messages.h>
#define TAG "Asteroids" // Used for logging
#define DEBUG_MSG 1
#define SCREEN_XRES 128
#define SCREEN_YRES 64
#define GAME_START_LIVES 3
#define TTLBUL 30 /* Bullet time to live, in ticks. */
#define MAXBUL 5 /* Max bullets on the screen. */
#define MAXAST 32 /* Max asteroids on the screen. */
#define SHIP_HIT_ANIMATION_LEN 15
#define SAVING_DIRECTORY "/ext/apps/Games"
#define SAVING_FILENAME SAVING_DIRECTORY "/game_asteroids.save"
#ifndef PI
#define PI 3.14159265358979f
#endif
/* ============================ Data structures ============================= */
typedef struct Ship {
float x, /* Ship x position. */
y, /* Ship y position. */
vx, /* x velocity. */
vy, /* y velocity. */
rot; /* Current rotation. 2*PI full ortation. */
} Ship;
typedef struct Bullet {
float x, y, vx, vy; /* Fields like in ship. */
uint32_t ttl; /* Time to live, in ticks. */
} Bullet;
typedef struct Asteroid {
float x, y, vx, vy, rot, /* Fields like ship. */
rot_speed, /* Angular velocity (rot speed and sense). */
size; /* Asteroid size. */
uint8_t shape_seed; /* Seed to give random shape. */
} Asteroid;
typedef struct AsteroidsApp {
/* GUI */
Gui* gui;
ViewPort* view_port; /* We just use a raw viewport and we render
everything into the low level canvas. */
FuriMessageQueue* event_queue; /* Keypress events go here. */
/* Game state. */
int running; /* Once false exists the app. */
bool gameover; /* Gameover status. */
uint32_t ticks; /* Game ticks. Increments at each refresh. */
uint32_t score; /* Game score. */
uint32_t highscore; /* Highscore. Shown on Game Over Screen */
bool is_new_highscore; /* Is the last score a new highscore? */
uint32_t lives; /* Number of lives in the current game. */
uint32_t ship_hit; /* When non zero, the ship was hit by an asteroid
and we need to show an animation as long as
its value is non-zero (and decrease it's value
at each tick of animation). */
/* Ship state. */
struct Ship ship;
/* Bullets state. */
struct Bullet bullets[MAXBUL]; /* Each bullet state. */
int bullets_num; /* Active bullets. */
uint32_t last_bullet_tick; /* Tick the last bullet was fired. */
/* Asteroids state. */
Asteroid asteroids[MAXAST]; /* Each asteroid state. */
int asteroids_num; /* Active asteroids. */
uint32_t pressed[InputKeyMAX]; /* pressed[id] is true if pressed.
Each array item contains the time
in milliseconds the key was pressed. */
bool fire; /* Short press detected: fire a bullet. */
} AsteroidsApp;
const NotificationSequence sequence_thrusters = {
&message_vibro_on,
&message_delay_10,
&message_vibro_off,
NULL,
};
const NotificationSequence sequence_brake = {
&message_vibro_on,
&message_delay_10,
&message_delay_1,
&message_delay_1,
&message_vibro_off,
NULL,
};
const NotificationSequence sequence_crash = {
&message_red_255,
&message_vibro_on,
// &message_note_g5, // Play sound but currently disabled
&message_delay_25,
// &message_note_e5,
&message_vibro_off,
&message_sound_off,
NULL,
};
const NotificationSequence sequence_bullet_fired = {
&message_vibro_on,
// &message_note_g5, // Play sound but currently disabled. Need On/Off menu setting
&message_delay_10,
&message_delay_1,
&message_delay_1,
&message_delay_1,
&message_delay_1,
&message_delay_1,
// &message_note_e5,
&message_vibro_off,
&message_sound_off,
NULL,
};
/* ============================== Prototyeps ================================ */
// Only functions called before their definition are here.
bool load_game(AsteroidsApp* app);
void save_game(AsteroidsApp* app);
void restart_game_after_gameover(AsteroidsApp* app);
uint32_t key_pressed_time(AsteroidsApp* app, InputKey key);
/* ============================ 2D drawing ================================== */
/* This structure represents a polygon of at most POLY_MAX points.
* The function draw_poly() is able to render it on the screen, rotated
* by the amount specified. */
#define POLY_MAX 8
typedef struct Poly {
float x[POLY_MAX];
float y[POLY_MAX];
uint32_t points; /* Number of points actually populated. */
} Poly;
/* Define the polygons we use. */
Poly ShipPoly = {{-3, 0, 3}, {-3, 6, -3}, 3};
Poly ShipFirePoly = {{-1.5, 0, 1.5}, {-3, -6, -3}, 3};
/* Rotate the point of the poligon 'poly' and store the new rotated
* polygon in 'rot'. The polygon is rotated by an angle 'a', with
* center at 0,0. */
void rotate_poly(Poly* rot, Poly* poly, float a) {
/* We want to compute sin(a) and cos(a) only one time
* for every point to rotate. It's a slow operation. */
float sin_a = (float)sin(a);
float cos_a = (float)cos(a);
for(uint32_t j = 0; j < poly->points; j++) {
rot->x[j] = poly->x[j] * cos_a - poly->y[j] * sin_a;
rot->y[j] = poly->y[j] * cos_a + poly->x[j] * sin_a;
}
rot->points = poly->points;
}
/* This is an 8 bit LFSR we use to generate a predictable and fast
* pseudorandom sequence of numbers, to give a different shape to
* each asteroid. */
void lfsr_next(unsigned char* prev) {
unsigned char lsb = *prev & 1;
*prev = *prev >> 1;
if(lsb == 1) *prev ^= 0b11000111;
*prev ^= *prev << 7; /* Mix things a bit more. */
}
/* Render the polygon 'poly' at x,y, rotated by the specified angle. */
void draw_poly(Canvas* const canvas, Poly* poly, uint8_t x, uint8_t y, float a) {
Poly rot;
rotate_poly(&rot, poly, a);
canvas_set_color(canvas, ColorBlack);
for(uint32_t j = 0; j < rot.points; j++) {
uint32_t a = j;
uint32_t b = j + 1;
if(b == rot.points) b = 0;
canvas_draw_line(canvas, x + rot.x[a], y + rot.y[a], x + rot.x[b], y + rot.y[b]);
}
}
/* A bullet is just a + pixels pattern. A single pixel is not
* visible enough. */
void draw_bullet(Canvas* const canvas, Bullet* b) {
canvas_draw_dot(canvas, b->x - 1, b->y);
canvas_draw_dot(canvas, b->x + 1, b->y);
canvas_draw_dot(canvas, b->x, b->y);
canvas_draw_dot(canvas, b->x, b->y - 1);
canvas_draw_dot(canvas, b->x, b->y + 1);
}
/* Draw an asteroid. The asteroid shapes is computed on the fly and
* is not stored in a permanent shape structure. In order to generate
* the shape, we use an initial fixed shape that we resize according
* to the asteroid size, perturbate according to the asteroid shape
* seed, and finally draw it rotated of the right amount. */
void draw_asteroid(Canvas* const canvas, Asteroid* ast) {
Poly ap;
/* Start with what is kinda of a circle. Note that this could be
* stored into a template and copied here, to avoid computing
* sin() / cos(). But the Flipper can handle it without problems. */
uint8_t r = ast->shape_seed;
for(int j = 0; j < 8; j++) {
float a = (PI * 2) / 8 * j;
/* Before generating the point, to make the shape unique generate
* a random factor between .7 and 1.3 to scale the distance from
* the center. However this asteroid should have its unique shape
* that remains always the same, so we use a predictable PRNG
* implemented by an 8 bit shift register. */
lfsr_next(&r);
float scaling = .7 + ((float)r / 255 * .6);
ap.x[j] = (float)sin(a) * ast->size * scaling;
ap.y[j] = (float)cos(a) * ast->size * scaling;
}
ap.points = 8;
draw_poly(canvas, &ap, ast->x, ast->y, ast->rot);
}
/* Draw small ships in the top-right part of the screen, one for
* each left live. */
void draw_left_lives(Canvas* const canvas, AsteroidsApp* app) {
int lives = app->lives;
int x = SCREEN_XRES - 5;
Poly mini_ship = {{-2, 0, 2}, {-2, 4, -2}, 3};
while(lives--) {
draw_poly(canvas, &mini_ship, x, 6, PI);
x -= 6;
}
}
/* Given the current position, update it according to the velocity and
* wrap it back to the other side if the object went over the screen. */
void update_pos_by_velocity(float* x, float* y, float vx, float vy) {
/* Return back from one side to the other of the screen. */
*x += vx;
*y += vy;
if(*x >= SCREEN_XRES)
*x = 0;
else if(*x < 0)
*x = SCREEN_XRES - 1;
if(*y >= SCREEN_YRES)
*y = 0;
else if(*y < 0)
*y = SCREEN_YRES - 1;
}
/* Render the current game screen. */
void render_callback(Canvas* const canvas, void* ctx) {
AsteroidsApp* app = ctx;
/* Clear screen. */
canvas_set_color(canvas, ColorWhite);
canvas_draw_box(canvas, 0, 0, SCREEN_XRES - 1, SCREEN_YRES - 1);
/* Draw score. */
canvas_set_color(canvas, ColorBlack);
canvas_set_font(canvas, FontSecondary);
char score[32];
snprintf(score, sizeof(score), "%lu", app->score);
canvas_draw_str(canvas, 0, 8, score);
/* Draw left ships. */
draw_left_lives(canvas, app);
/* Draw ship, asteroids, bullets. */
draw_poly(canvas, &ShipPoly, app->ship.x, app->ship.y, app->ship.rot);
if(key_pressed_time(app, InputKeyUp) > 0) {
notification_message(furi_record_open(RECORD_NOTIFICATION), &sequence_thrusters);
draw_poly(canvas, &ShipFirePoly, app->ship.x, app->ship.y, app->ship.rot);
}
for(int j = 0; j < app->bullets_num; j++) draw_bullet(canvas, &app->bullets[j]);
for(int j = 0; j < app->asteroids_num; j++) draw_asteroid(canvas, &app->asteroids[j]);
/* Game over text. */
if(app->gameover) {
canvas_set_color(canvas, ColorBlack);
canvas_set_font(canvas, FontPrimary);
// TODO: if new highscore, display blinking "New High Score"
// Display High Score
if(app->is_new_highscore) {
canvas_draw_str(canvas, 22, 9, "New High Score!");
} else {
canvas_draw_str(canvas, 36, 9, "High Score");
}
// Convert highscore to string
int length = snprintf(NULL, 0, "%lu", app->highscore);
char* str_high_score = malloc(length + 1);
snprintf(str_high_score, length + 1, "%lu", app->highscore);
// Get length to center on screen
int nDigits = 0;
if(app->highscore > 0) {
nDigits = floor(log10(app->highscore)) + 1;
}
// Draw highscore centered
canvas_draw_str(canvas, (SCREEN_XRES / 2) - (nDigits * 2), 20, str_high_score);
free(str_high_score);
canvas_draw_str(canvas, 28, 35, "GAME OVER");
canvas_set_font(canvas, FontSecondary);
canvas_draw_str(canvas, 25, 50, "Press OK to restart");
}
}
/* ============================ Game logic ================================== */
float distance(float x1, float y1, float x2, float y2) {
float dx = x1 - x2;
float dy = y1 - y2;
return sqrt(dx * dx + dy * dy);
}
/* Detect a collision between the object at x1,y1 of radius r1 and
* the object at x2, y2 of radius r2. A factor < 1 will make the
* function detect the collision even if the objects are yet not
* relly touching, while a factor > 1 will make it detect the collision
* only after they are a bit overlapping. It basically is used to
* rescale the distance.
*
* Note that in this simplified 2D world, objects are all considered
* spheres (this is why this function only takes the radius). This
* is, after all, kinda accurate for asteroids, for bullets, and
* even for the ship "core" itself. */
bool objects_are_colliding(float x1, float y1, float r1, float x2, float y2, float r2, float factor) {
/* The objects are colliding if the distance between object 1 and 2
* is smaller than the sum of the two radiuses r1 and r2.
* So it would be like: sqrt((x1-x2)^2+(y1-y2)^2) < r1+r2.
* However we can avoid computing the sqrt (which is slow) by
* squaring the second term and removing the square root, making
* the comparison like this:
*
* (x1-x2)^2+(y1-y2)^2 < (r1+r2)^2. */
float dx = (x1 - x2) * factor;
float dy = (y1 - y2) * factor;
float rsum = r1 + r2;
return dx * dx + dy * dy < rsum * rsum;
}
/* Create a new bullet headed in the same direction of the ship. */
void ship_fire_bullet(AsteroidsApp* app) {
if(app->bullets_num == MAXBUL) return;
notification_message(furi_record_open(RECORD_NOTIFICATION), &sequence_bullet_fired);
Bullet* b = &app->bullets[app->bullets_num];
b->x = app->ship.x;
b->y = app->ship.y;
b->vx = -sin(app->ship.rot);
b->vy = cos(app->ship.rot);
/* Ship should fire from its head, not in the middle. */
b->x += b->vx * 5;
b->y += b->vy * 5;
/* Give the bullet some velocity (for now the vector is just
* normalized to 1). */
b->vx *= 3;
b->vy *= 3;
/* It's more realistic if we add the velocity vector of the
* ship, too. Otherwise if the ship is going fast the bullets
* will be slower, which is not how the world works. */
b->vx += app->ship.vx;
b->vy += app->ship.vy;
b->ttl = TTLBUL; /* The bullet will disappear after N ticks. */
app->bullets_num++;
}
/* Remove the specified bullet by id (index in the array). */
void remove_bullet(AsteroidsApp* app, int bid) {
/* Replace the top bullet with the empty space left
* by the removal of this bullet. This way we always take the
* array dense, which is an advantage when looping. */
int n = --app->bullets_num;
if(n && bid != n) app->bullets[bid] = app->bullets[n];
}
/* Create a new asteroid, away from the ship. Return the
* pointer to the asteroid object, so that the caller can change
* certain things of the asteroid if needed. */
Asteroid* add_asteroid(AsteroidsApp* app) {
if(app->asteroids_num == MAXAST) return NULL;
float size = 4 + rand() % 15;
float min_distance = 20;
float x, y;
do {
x = rand() % SCREEN_XRES;
y = rand() % SCREEN_YRES;
} while(distance(app->ship.x, app->ship.y, x, y) < min_distance + size);
Asteroid* a = &app->asteroids[app->asteroids_num++];
a->x = x;
a->y = y;
a->vx = 2 * (-.5 + ((float)rand() / RAND_MAX));
a->vy = 2 * (-.5 + ((float)rand() / RAND_MAX));
a->size = size;
a->rot = 0;
a->rot_speed = ((float)rand() / RAND_MAX) / 10;
if(app->ticks & 1) a->rot_speed = -(a->rot_speed);
a->shape_seed = rand() & 255;
return a;
}
/* Remove the specified asteroid by id (index in the array). */
void remove_asteroid(AsteroidsApp* app, int id) {
/* Replace the top asteroid with the empty space left
* by the removal of this one. This way we always take the
* array dense, which is an advantage when looping. */
int n = --app->asteroids_num;
if(n && id != n) app->asteroids[id] = app->asteroids[n];
}
/* Called when an asteroid was reached by a bullet. The asteroid
* hit is the one with the specified 'id'. */
void asteroid_was_hit(AsteroidsApp* app, int id) {
float sizelimit = 6; // Smaller than that polverize in one shot.
Asteroid* a = &app->asteroids[id];
/* Asteroid is large enough to break into fragments. */
float size = a->size;
float x = a->x, y = a->y;
remove_asteroid(app, id);
if(size > sizelimit) {
int max_fragments = size / sizelimit;
int fragments = 2 + rand() % max_fragments;
float newsize = size / fragments;
if(newsize < 2) newsize = 2;
for(int j = 0; j < fragments; j++) {
a = add_asteroid(app);
if(a == NULL) break; // Too many asteroids on screen.
a->x = x + -(size / 2) + rand() % (int)newsize;
a->y = y + -(size / 2) + rand() % (int)newsize;
a->size = newsize;
}
} else {
app->score++;
if(app->score > app->highscore) {
app->is_new_highscore = true;
app->highscore = app->score; // Show on Game Over Screen and future main menu
}
}
}
/* Set gameover state. When in game-over mode, the game displays a gameover
* text with a background of many asteroids floating around. */
void game_over(AsteroidsApp* app) {
if(app->is_new_highscore) save_game(app); // Save highscore but only on change
app->gameover = true;
app->lives = GAME_START_LIVES; // Show 3 lives in game over screen to match new game start
}
/* Function called when a collision between the asteroid and the
* ship is detected. */
void ship_was_hit(AsteroidsApp* app) {
app->ship_hit = SHIP_HIT_ANIMATION_LEN;
if(app->lives) {
app->lives--;
} else {
game_over(app);
}
}
/* Restart game after the ship is hit. Will reset the ship position, bullets
* and asteroids to restart the game. */
void restart_game(AsteroidsApp* app) {
app->ship.x = SCREEN_XRES / 2;
app->ship.y = SCREEN_YRES / 2;
app->ship.rot = PI; /* Start headed towards top. */
app->ship.vx = 0;
app->ship.vy = 0;
app->bullets_num = 0;
app->last_bullet_tick = 0;
app->asteroids_num = 0;
app->ship_hit = 0;
}
/* Called after gameover to restart the game. This function
* also calls restart_game(). */
void restart_game_after_gameover(AsteroidsApp* app) {
app->gameover = false;
app->ticks = 0;
app->score = 0;
app->is_new_highscore = false;
app->lives = GAME_START_LIVES - 1;
restart_game(app);
}
/* Move bullets. */
void update_bullets_position(AsteroidsApp* app) {
for(int j = 0; j < app->bullets_num; j++) {
update_pos_by_velocity(
&app->bullets[j].x, &app->bullets[j].y, app->bullets[j].vx, app->bullets[j].vy);
if(--app->bullets[j].ttl == 0) {
remove_bullet(app, j);
j--; /* Process this bullet index again: the removal will
fill it with the top bullet to take the array dense. */
}
}
}
/* Move asteroids. */
void update_asteroids_position(AsteroidsApp* app) {
for(int j = 0; j < app->asteroids_num; j++) {
update_pos_by_velocity(
&app->asteroids[j].x, &app->asteroids[j].y, app->asteroids[j].vx, app->asteroids[j].vy);
app->asteroids[j].rot += app->asteroids[j].rot_speed;
if(app->asteroids[j].rot < 0)
app->asteroids[j].rot = 2 * PI;
else if(app->asteroids[j].rot > 2 * PI)
app->asteroids[j].rot = 0;
}
}
/* Collision detection and game state update based on collisions. */
void detect_collisions(AsteroidsApp* app) {
/* Detect collision between bullet and asteroid. */
for(int j = 0; j < app->bullets_num; j++) {
Bullet* b = &app->bullets[j];
for(int i = 0; i < app->asteroids_num; i++) {
Asteroid* a = &app->asteroids[i];
if(objects_are_colliding(a->x, a->y, a->size, b->x, b->y, 1.5, 1)) {
asteroid_was_hit(app, i);
remove_bullet(app, j);
/* The bullet no longer exist. Break the loop.
* However we want to start processing from the
* same bullet index, since now it is used by
* another bullet (see remove_bullet()). */
j--; /* Scan this j value again. */
break;
}
}
}
/* Detect collision between ship and asteroid. */
for(int j = 0; j < app->asteroids_num; j++) {
Asteroid* a = &app->asteroids[j];
if(objects_are_colliding(a->x, a->y, a->size, app->ship.x, app->ship.y, 4, 1)) {
ship_was_hit(app);
break;
}
}
}
/* This is the main game execution function, called 10 times for
* second (with the Flipper screen latency, an higher FPS does not
* make sense). In this function we update the position of objects based
* on velocity. Detect collisions. Update the score and so forth.
*
* Each time this function is called, app->tick is incremented. */
void game_tick(void* ctx) {
AsteroidsApp* app = ctx;
/* There are two special screens:
*
* 1. Ship was hit, we frozen the game as long as ship_hit isn't zero
* again, and show an animation of a rotating ship. */
if(app->ship_hit) {
notification_message(furi_record_open(RECORD_NOTIFICATION), &sequence_crash);
app->ship.rot += 0.5;
app->ship_hit--;
view_port_update(app->view_port);
if(app->ship_hit == 0) {
restart_game(app);
}
return;
} else if(app->gameover) {
/* 2. Game over. We need to update only background asteroids. In this
* state the game just displays a GAME OVER text with the floating
* asteroids in backgroud. */
if(key_pressed_time(app, InputKeyOk) > 100) {
restart_game_after_gameover(app);
}
update_asteroids_position(app);
view_port_update(app->view_port);
return;
}
/* Handle keypresses. */
if(app->pressed[InputKeyLeft]) app->ship.rot -= .35;
if(app->pressed[InputKeyRight]) app->ship.rot += .35;
if(app->pressed[InputKeyUp]) {
app->ship.vx -= 0.5 * (float)sin(app->ship.rot);
app->ship.vy += 0.5 * (float)cos(app->ship.rot);
} else if(app->pressed[InputKeyDown]) {
notification_message(furi_record_open(RECORD_NOTIFICATION), &sequence_brake);
app->ship.vx *= 0.75;
app->ship.vy *= 0.75;
}
/* Fire a bullet if needed. app->fire is set in
* asteroids_update_keypress_state() since depends on exact
* pressure timing. */
if(app->fire) {
uint32_t bullet_min_period = 200; // In milliseconds
uint32_t now = furi_get_tick();
if(now - app->last_bullet_tick >= bullet_min_period) {
ship_fire_bullet(app);
app->last_bullet_tick = now;
}
app->fire = false;
}
/* Update positions and detect collisions. */
update_pos_by_velocity(&app->ship.x, &app->ship.y, app->ship.vx, app->ship.vy);
update_bullets_position(app);
update_asteroids_position(app);
detect_collisions(app);
/* From time to time, create a new asteroid. The more asteroids
* already on the screen, the smaller probability of creating
* a new one. */
if(app->asteroids_num == 0 || (random() % 5000) < (30 / (1 + app->asteroids_num))) {
add_asteroid(app);
}
app->ticks++;
view_port_update(app->view_port);
}
/* ======================== Flipper specific code =========================== */
bool load_game(AsteroidsApp* app) {
Storage* storage = furi_record_open(RECORD_STORAGE);
File* file = storage_file_alloc(storage);
uint16_t bytes_readed = 0;
if(storage_file_open(file, SAVING_FILENAME, FSAM_READ, FSOM_OPEN_EXISTING)) {
bytes_readed = storage_file_read(file, app, sizeof(AsteroidsApp));
}
storage_file_close(file);
storage_file_free(file);
furi_record_close(RECORD_STORAGE);
return bytes_readed == sizeof(AsteroidsApp);
}
void save_game(AsteroidsApp* app) {
Storage* storage = furi_record_open(RECORD_STORAGE);
if(storage_common_stat(storage, SAVING_DIRECTORY, NULL) == FSE_NOT_EXIST) {
if(!storage_simply_mkdir(storage, SAVING_DIRECTORY)) {
return;
}
}
File* file = storage_file_alloc(storage);
if(storage_file_open(file, SAVING_FILENAME, FSAM_WRITE, FSOM_CREATE_ALWAYS)) {
storage_file_write(file, app, sizeof(AsteroidsApp));
}
storage_file_close(file);
storage_file_free(file);
furi_record_close(RECORD_STORAGE);
}
/* Here all we do is putting the events into the queue that will be handled
* in the while() loop of the app entry point function. */
void input_callback(InputEvent* input_event, void* ctx) {
AsteroidsApp* app = ctx;
furi_message_queue_put(app->event_queue, input_event, FuriWaitForever);
}
/* Allocate the application state and initialize a number of stuff.
* This is called in the entry point to create the application state. */
AsteroidsApp* asteroids_app_alloc() {
AsteroidsApp* app = malloc(sizeof(AsteroidsApp));
load_game(app);
app->gui = furi_record_open(RECORD_GUI);
app->view_port = view_port_alloc();
view_port_draw_callback_set(app->view_port, render_callback, app);
view_port_input_callback_set(app->view_port, input_callback, app);
gui_add_view_port(app->gui, app->view_port, GuiLayerFullscreen);
app->event_queue = furi_message_queue_alloc(8, sizeof(InputEvent));
app->running = 1; /* Turns 0 when back is pressed. */
restart_game_after_gameover(app);
memset(app->pressed, 0, sizeof(app->pressed));
return app;
}
/* Free what the application allocated. It is not clear to me if the
* Flipper OS, once the application exits, will be able to reclaim space
* even if we forget to free something here. */
void asteroids_app_free(AsteroidsApp* app) {
furi_assert(app);
// View related.
view_port_enabled_set(app->view_port, false);
gui_remove_view_port(app->gui, app->view_port);
view_port_free(app->view_port);
furi_record_close(RECORD_GUI);
furi_message_queue_free(app->event_queue);
app->gui = NULL;
free(app);
}
/* Return the time in milliseconds the specified key is continuously
* pressed. Or 0 if it is not pressed. */
uint32_t key_pressed_time(AsteroidsApp* app, InputKey key) {
return app->pressed[key] == 0 ? 0 : furi_get_tick() - app->pressed[key];
}
/* Handle keys interaction. */
void asteroids_update_keypress_state(AsteroidsApp* app, InputEvent input) {
// Allow Rapid fire
if(input.key == InputKeyOk) {
app->fire = true;
}
if(input.type == InputTypePress) {
app->pressed[input.key] = furi_get_tick();
} else if(input.type == InputTypeRelease) {
app->pressed[input.key] = 0;
}
}
int32_t asteroids_app_entry(void* p) {
UNUSED(p);
AsteroidsApp* app = asteroids_app_alloc();
/* Create a timer. We do data analysis in the callback. */
FuriTimer* timer = furi_timer_alloc(game_tick, FuriTimerTypePeriodic, app);
furi_timer_start(timer, furi_kernel_get_tick_frequency() / 10);
/* This is the main event loop: here we get the events that are pushed
* in the queue by input_callback(), and process them one after the
* other. */
InputEvent input;
while(app->running) {
FuriStatus qstat = furi_message_queue_get(app->event_queue, &input, 100);
if(qstat == FuriStatusOk) {
if(DEBUG_MSG)
FURI_LOG_E(TAG, "Main Loop - Input: type %d key %u", input.type, input.key);
/* Handle navigation here. Then handle view-specific inputs
* in the view specific handling function. */
if(input.type == InputTypeLong && input.key == InputKeyBack) {
// Save High Score even if player didn't finish game
if(app->is_new_highscore) save_game(app); // Save highscore but only on change
app->running = 0;
} else {
asteroids_update_keypress_state(app, input);
}
} else {
/* Useful to understand if the app is still alive when it
* does not respond because of bugs. */
if(DEBUG_MSG) {
static int c = 0;
c++;
if(!(c % 20)) FURI_LOG_E(TAG, "Loop timeout");
}
}
}
furi_timer_free(timer);
asteroids_app_free(app);
return 0;
}
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App(
appid="asteroids",
name="Asteroids",
apptype=FlipperAppType.EXTERNAL,
entry_point="asteroids_app_entry",
cdefines=["APP_ASTEROIDS"],
requires=["gui"],
stack_size=8*1024,
order=50,
fap_icon="appicon.png",
fap_category="Games_Extra",
)
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