/*************************************************************************** * __________ __ ___. * Open \______ \ ____ ____ | | _\_ |__ _______ ___ * Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ / * Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < < * Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \ * \/ \/ \/ \/ \/ * Copyright (C) 2005 Kévin Ferrare * * All files in this archive are subject to the GNU General Public License. * See the file COPYING in the source tree root for full license agreement. * * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY * KIND, either express or implied. * ****************************************************************************/ #include "plugin.h" #ifdef HAVE_LCD_BITMAP /* and also not for the Player */ /******************************* Globals ***********************************/ static struct plugin_api* rb; /* global api struct pointer */ /* Key assignement */ #define STARFIELD_QUIT BUTTON_OFF #define STARFIELD_INCREASE_ZMOVE BUTTON_UP #define STARFIELD_DECREASE_ZMOVE BUTTON_DOWN #define STARFIELD_INCREASE_NB_STARS BUTTON_RIGHT #define STARFIELD_DECREASE_NB_STARS BUTTON_LEFT #define LCD_CENTER_X (LCD_WIDTH/2) #define LCD_CENTER_Y (LCD_HEIGHT/2) #define Z_MAX_DIST 100 #define MAX_STARS 3000 #define INIT_STARS 600 #define STARFIELD_INCREASE_STEP 100 #define INIT_SPACE_SPEED 1 #define STAR_MAX_VELOCITY 2 /* * max 3d coord in the 2d screen : * example with x * x2d=x3d/z+LCD_CENTER_X (+LCD_CENTER_X to center ...) * so * max_x2d=max_x3d/max_z+LCD_CENTER_X * max_x3d=(max_x2d-LCD_CENTER_X)*max_z * with * max_x2d = LCD_WIDTH * max_z = Z_MAX_DIST * we have now * max_x3d=(LCD_WIDTH-LCD_CENTER_X)*Z_MAX_DIST * max_x3d=LCD_CENTER_X*Z_MAX_DIST */ #define MAX_INIT_STAR_X LCD_CENTER_X*Z_MAX_DIST #define MAX_INIT_STAR_Y LCD_CENTER_Y*Z_MAX_DIST #define MSG_DISP_TIME 30 static struct plugin_api* rb; /* global api struct pointer */ /* * Each star's stuffs */ struct star { int x,y,z; int velocity; }; static inline void star_init(struct star * star, int z_move) { star->velocity=rb->rand() % STAR_MAX_VELOCITY+1; /* choose x between -MAX_INIT_STAR_X and MAX_INIT_STAR_X */ star->x=rb->rand() % (2*MAX_INIT_STAR_X)-MAX_INIT_STAR_X; star->y=rb->rand() % (2*MAX_INIT_STAR_Y)-MAX_INIT_STAR_Y; if(z_move>=0) star->z=Z_MAX_DIST; else star->z=rb->rand() %Z_MAX_DIST/2+1; } static inline void star_move(struct star * star, int z_move) { star->z -= z_move*star->velocity; if (star->z <= 0 || star->z > Z_MAX_DIST) star_init(star, z_move); } static inline void star_draw(struct star * star, int z_move) { int x_draw, y_draw; /* * 3d -> 2d : projection on the screen : x2d=x3d/z (thales theorem) * we put the star in the center of the screen */ x_draw = star->x / star->z + LCD_CENTER_X; if (x_draw < 1 || x_draw >= LCD_WIDTH) { star_init(star, z_move); return; } y_draw = star->y / star->z + LCD_CENTER_Y; if (y_draw < 1 || y_draw >= LCD_HEIGHT) { star_init(star, z_move); return; } rb->lcd_drawpixel(x_draw, y_draw); if(star->z<5*Z_MAX_DIST/6) { rb->lcd_drawpixel(x_draw, y_draw - 1); rb->lcd_drawpixel(x_draw - 1, y_draw); if(star->zlcd_drawpixel(x_draw + 1, y_draw); rb->lcd_drawpixel(x_draw, y_draw + 1); } } } /* * Whole starfield operations */ struct starfield { struct star tab[MAX_STARS]; int nb_stars; int z_move; }; static inline void starfield_init(struct starfield * starfield) { starfield->nb_stars=0; starfield->z_move=INIT_SPACE_SPEED; } static inline void starfield_add_stars(struct starfield * starfield, int nb_to_add) { int i, old_nb_stars; old_nb_stars=starfield->nb_stars; starfield->nb_stars+=nb_to_add; if(starfield->nb_stars > MAX_STARS) starfield->nb_stars=MAX_STARS; for( i=old_nb_stars ; i < starfield->nb_stars ; ++i ) { star_init( &(starfield->tab[i]), starfield->z_move ); } } static inline void starfield_del_stars(struct starfield * starfield, int nb_to_add) { starfield->nb_stars-=nb_to_add; if(starfield->nb_stars<0) starfield->nb_stars=0; } static inline void starfield_move_and_draw(struct starfield * starfield) { int i; for(i=0;inb_stars;++i) { star_move(&(starfield->tab[i]), starfield->z_move); star_draw(&(starfield->tab[i]), starfield->z_move); } } static struct starfield starfield; int main(void) { char str_buffer[40]; int button, t_disp=0; int font_h, font_w; rb->lcd_getstringsize("A", &font_w, &font_h); starfield_init(&starfield); starfield_add_stars(&starfield, INIT_STARS); while (true) { rb->sleep(1); rb->lcd_clear_display(); starfield_move_and_draw(&starfield); if (t_disp > 0) {/* if a parameter is updated (by the user), we must print it */ --t_disp; rb->snprintf(str_buffer, sizeof(str_buffer), "[stars:%d] [speed:%d]", starfield.nb_stars, starfield.z_move); rb->lcd_putsxy(0, LCD_HEIGHT-font_h, str_buffer); } rb->lcd_update(); button = rb->button_get(false); switch(button) { case (STARFIELD_INCREASE_ZMOVE): case (STARFIELD_INCREASE_ZMOVE | BUTTON_REPEAT): ++(starfield.z_move); t_disp=MSG_DISP_TIME; break; case (STARFIELD_DECREASE_ZMOVE): case (STARFIELD_DECREASE_ZMOVE | BUTTON_REPEAT): --(starfield.z_move); t_disp=MSG_DISP_TIME; break; case(STARFIELD_INCREASE_NB_STARS): case(STARFIELD_INCREASE_NB_STARS | BUTTON_REPEAT): starfield_add_stars(&starfield, STARFIELD_INCREASE_STEP); t_disp=MSG_DISP_TIME; break; case(STARFIELD_DECREASE_NB_STARS): case(STARFIELD_DECREASE_NB_STARS | BUTTON_REPEAT): starfield_del_stars(&starfield, STARFIELD_INCREASE_STEP); t_disp=MSG_DISP_TIME; break; case(STARFIELD_QUIT): case(SYS_USB_CONNECTED): rb->backlight_set_timeout(rb->global_settings->backlight_timeout); return PLUGIN_OK; break; } } } /*************************** Plugin entry point ****************************/ enum plugin_status plugin_start(struct plugin_api* api, void* parameter) { int ret; /* * this macro should be called as the first thing you do in the plugin. * it test that the api version and model the plugin was compiled for * matches the machine it is running on */ TEST_PLUGIN_API(api); rb = api; // copy to global api pointer (void)parameter; if (rb->global_settings->backlight_timeout > 0) rb->backlight_set_timeout(1);/* keep the light on */ ret = main(); return ret; } #endif // #ifdef HAVE_LCD_BITMAP