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/* nyancat in GNU C
Copyright © 2024 DiffieHellman
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU Affero 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. See the
GNU Affero General Public License for more details.
You should have received a copy of the GNU Affero General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include <SDL2/SDL.h>
#include <SDL2/SDL_image.h>
#include <SDL2/SDL_mixer.h>
#include <stdbool.h>
#include "nyan.h"
#include <bsd/sys/queue.h> // linked list implementation
#include "main.h"
void add_sparkle(struct head_sparkle *sparkle_list)
{
sparkle_instance *new = ec_malloc(sizeof(sparkle_instance));
new->loc.x = screen_width + 80;
new->loc.y = (rand() % (screen_height + sparkle_height)) - sparkle_height;
new->frame = 0;
new->frame_mov = 1;
new->speed = 10 + (rand() % 30);
new->layer = rand() % 2;
LIST_INSERT_HEAD(sparkle_list, new, entries);
}
void add_cat(unsigned int x, unsigned int y, int bx, int by, struct head_cat *cat_list)
{
cat_instance *new = ec_malloc(sizeof(cat_instance));
new->loc.x = x;
new->loc.y = y;
new->bounce_direction.x = bx;
new->bounce_direction.y = by;
LIST_INSERT_HEAD(cat_list, new, entries);
}
void add_rainbow(unsigned int x, unsigned int y, struct head_rainbow *rainbow_list)
{
rainbow_instance *new = ec_malloc(sizeof(rainbow_instance));
new->loc.x = x;
new->loc.y = y;
new->sprite = rainbow_sprite;
LIST_INSERT_HEAD(rainbow_list, new, entries);
}
void update_rainbows(struct head_cat *cat_list, struct head_rainbow *rainbow_list)
{
cat_instance *c;
/* rainbows need to be placed according to the cat position (which changes constantly) */
LIST_FOREACH(c, cat_list, entries)
{
add_rainbow((screen_width - rainbow_width) / 2 - OFFSET /* Default position in the center */
- ((screen_width - cat_width) / 2 - c->loc.x), /* Plus the amount the cat is off the center */
(screen_height - rainbow_height) / 2 /* Default position in the center */
- ((screen_height - cat_height) / 2 - c->loc.y), rainbow_list);/* Plus the amount the cat is off the center */
}
rainbow_instance *r, *rtmp;
/* update the position of each rainbow left */
LIST_FOREACH_SAFE(r, rainbow_list, entries, rtmp)
{
r->loc.x -= rainbow_width;
/* if rainbow is off screen, delete and free() it */
if ((r->loc.x + rainbow_width) < 0)
{
LIST_REMOVE(r, entries);
free(r);
}
}
}
void update_sparkles(struct head_sparkle *sparkle_list)
{
/* ensure screen has enough sparkles at all times */
sparkle_spawn_counter += rand() % screen_height;
while (sparkle_spawn_counter >= 1000)
{
add_sparkle(sparkle_list);
sparkle_spawn_counter -= 1000;
}
sparkle_instance *s, *stmp;
LIST_FOREACH_SAFE(s, sparkle_list, entries, stmp)
{
/* move sparkle left */
s->loc.x -= s->speed;
s->frame += s->frame_mov;
/* reset sparkle frame */
if (s->frame + 1 >= sparkle_count || s->frame < 1){s->frame_mov = 0 - s->frame_mov;}
/* if sparkle offscreen, delete it */
if ((s->loc.x + sparkle_width) < 0)
{
LIST_REMOVE(s, entries);
free(s);
}
}
}
void handle_sine(struct head_cat *cat_list)
{
cat_instance *c;
LIST_FOREACH(c, cat_list, entries)
{
/* sine magic */
double pos = (screen_height - cat_height)/2 * sin((2*PI*444444)*t);
c->loc.y = ((screen_height - cat_height)/2 - pos);
// double posx = (screen_width - cat_height)/2 * sin((2*PI*444444)*t);
// c->loc.x = ((screen_width - cat_height)/2 - posx);
}
t += 20;
}
void handle_bounce(struct head_cat *cat_list)
{
cat_instance *c;
LIST_FOREACH(c, cat_list, entries)
{
/* bounce magic */
if (c->loc.x < 0 || c->loc.x > (screen_width-cat_width)){c->bounce_direction.x = -(c->bounce_direction.x);}
if (c->loc.y < 0 || c->loc.y > (screen_height-(cat_width/2))){c->bounce_direction.y = -(c->bounce_direction.y);}
c->loc.x += (c->bounce_direction.x * (screen_width/64));
c->loc.y += (c->bounce_direction.y * (screen_height/64));
}
}
void draw_cats(struct head_cat *cat_list)
{
cat_instance* c;
LIST_FOREACH(c, cat_list, entries)
{
/* source sprite dimensions */
SDL_Rect srcrect = {cat_sprite * cat_width, 0, cat_width, cat_height};
/* dimensions of destination rectangle */
SDL_Rect dstrect = {c->loc.x, c->loc.y, cat_width*cat_size, cat_height*cat_size};
SDL_RenderCopy(renderer, cat_texture, &srcrect, &dstrect);
}
}
void draw_rainbows(struct head_rainbow *rainbow_list)
{
rainbow_instance* r;
LIST_FOREACH(r, rainbow_list, entries)
{
/* source sprite dimensions */
SDL_Rect srcrect = {r->sprite * rainbow_width, 0, rainbow_width, rainbow_height};
/* dimensions of destination rectangle */
SDL_Rect dstrect = {r->loc.x, r->loc.y, rainbow_width*cat_size, rainbow_height*cat_size};
SDL_RenderCopy(renderer, rainbow_texture, &srcrect, &dstrect);
}
}
void draw_sparkles(struct head_sparkle *sparkle_list)
{
sparkle_instance* s;
LIST_FOREACH(s, sparkle_list, entries)
{
/* source sprite dimensions */
SDL_Rect srcrect = {sparkle_sprite * sparkle_width, 0, sparkle_width, sparkle_height};
/* dimensions of destination rectangle */
SDL_Rect dstrect = {s->loc.x, s->loc.y, sparkle_width*cat_size, sparkle_height*cat_size};
SDL_RenderCopy(renderer, sparkle_texture, &srcrect, &dstrect);
}
}
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