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Tizen Native API
3.0
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ephysics_logo.c
#ifdef HAVE_CONFIG_H # include <config.h> #endif #include <Elementary.h> #include <EPhysics.h> #include <Evas.h> #define WIDTH (512) #define HEIGHT (384) #define DEPTH (100) #define FLOOR_Y (HEIGHT - 80) #define SH_THRESHOLD (250) #define SH_OFFSET_X (- 16) #define OFFSET_X (90) #define PADDING_X_1 (16) #define PADDING_X_2 (12) #define PADDING_X_3 (22) #define E_THRESHOLD (WIDTH + 560) #define LAYER_SHADOW (10) #define LAYER_LETTER (20) #define CENTER(total, item) (((total) - (item)) / 2) #define LIMIT(val, op, ref) (((val) op (ref)) ? (val) : (ref)); #define PROP_GET(pos, min, max) (((min) + ((max) - (min)) * (pos)) / (max)) static void _update_box_cb(void *data __UNUSED__, EPhysics_Body *body, void *event_info) { Evas_Object *image = event_info; Evas_Object *shadow = evas_object_data_get(image, "shadow"); Evas_Object *light = evas_object_data_get(image, "light"); int x, y, w, h, floor_distance, alpha = 0; /* modify the evas object according to the body */ ephysics_body_evas_object_update(body); evas_object_geometry_get(image, &x, &y, &w, &h); floor_distance = FLOOR_Y - h; /* Bodies penetrates the ground slightly before bouncing. */ /* This is to be expected in realtime physics engines. */ // TODO BUG: should we move the object up by the difference???? //y = LIMIT(y, <=, floor_distance); /* We should show the shadow when we're close enough to ground */ if (y > SH_THRESHOLD) { int sh_w, sh_h; double pos_x; evas_object_image_size_get(shadow, &sh_w, &sh_h); /* shadow is darker with bigger y */ alpha = 255 * (y - SH_THRESHOLD) / (floor_distance - SH_THRESHOLD); /* and with bigger x -- it's proportional to x / WIDTH, but varies * from 100 to 255. */ pos_x = (double) x / (WIDTH - w); alpha = alpha * PROP_GET(pos_x, 100, 255); /* box shadow is not resized, just moved */ evas_object_move(shadow, x + CENTER(w, sh_w) + SH_OFFSET_X, FLOOR_Y - sh_h + 2); } evas_object_color_set(shadow, alpha, alpha, alpha, alpha); evas_object_move(light, x, y); /* it's lighter with bigger y */ alpha = (y <= 0) ? 0 : y * 255 / floor_distance; /* and with bigger x */ alpha = alpha * (x - OFFSET_X + 80) / (WIDTH - OFFSET_X); evas_object_color_set(light, alpha, alpha, alpha, alpha); } static void _update_circle_cb(void *data __UNUSED__, EPhysics_Body *body, void *event_info) { Evas_Object *image = event_info; Evas_Object *shadow = evas_object_data_get(image, "shadow"); Evas_Object *light = evas_object_data_get(image, "light"); int x, y, w, h, sh_w, sh_h, alpha = 0; const Evas_Map *map; /* modify the evas object according to the body */ ephysics_body_evas_object_update(body); evas_object_geometry_get(image, &x, &y, &w, &h); evas_object_move(light, x, y); alpha = x * 255 / (WIDTH - w); evas_object_color_set(light, alpha, alpha, alpha, alpha); /* use the same map from image to the light (rotate it) */ map = evas_object_map_get(image); evas_object_map_set(light, map); evas_object_map_enable_set(light, EINA_TRUE); evas_object_image_size_get(shadow, &sh_w, &sh_h); evas_object_move(shadow, x + CENTER(w, sh_w) + SH_OFFSET_X, FLOOR_Y - sh_h + 2); alpha = 127 + alpha / 2; evas_object_color_set(shadow, alpha, alpha, alpha, alpha); if (x > E_THRESHOLD) ephysics_body_move(body, -w - 1, y, -15); } static void _letter_add(Evas *evas, const char *letter, Evas_Object **image, Evas_Object **light, Evas_Object **shadow) { int w, h, sh_w, sh_h; char buf[1024]; snprintf(buf, sizeof(buf), PACKAGE_DATA_DIR "/logo_shadow-%s.png", letter); *shadow = evas_object_image_filled_add(evas); evas_object_image_file_set(*shadow, buf, NULL); evas_object_image_size_get(*shadow, &sh_w, &sh_h); evas_object_resize(*shadow, sh_w, sh_h); evas_object_color_set(*shadow, 0, 0, 0, 0); evas_object_layer_set(*shadow, LAYER_SHADOW); evas_object_show(*shadow); snprintf(buf, sizeof(buf), PACKAGE_DATA_DIR "/logo_letter-%s.png", letter); *image = evas_object_image_filled_add(evas); evas_object_image_file_set(*image, buf, NULL); evas_object_image_size_get(*image, &w, &h); evas_object_resize(*image, w, h); evas_object_layer_set(*image, LAYER_LETTER); evas_object_show(*image); snprintf(buf, sizeof(buf), PACKAGE_DATA_DIR "/logo_light-%s.png", letter); *light = evas_object_image_filled_add(evas); evas_object_image_file_set(*light, buf, NULL); evas_object_resize(*light, w, h); evas_object_layer_set(*light, LAYER_LETTER); evas_object_show(*light); /* allow easy access to shadow and light from the letter image */ evas_object_data_set(*image, "shadow", *shadow); evas_object_data_set(*image, "light", *light); } static void _letter_body_setup_common(EPhysics_Body *body, Evas_Object *view) { ephysics_body_evas_object_set(body, view, EINA_TRUE); ephysics_body_mass_set(body, 1.2); ephysics_body_restitution_set(body, 0.6); ephysics_body_angular_movement_enable_set(body, EINA_FALSE, EINA_FALSE, EINA_FALSE); } static EPhysics_Body * _letter_body_box_add(EPhysics_World *world, Evas_Object *image) { EPhysics_Body *body = ephysics_body_box_add(world); _letter_body_setup_common(body, image); ephysics_body_event_callback_add (body, EPHYSICS_CALLBACK_BODY_UPDATE, _update_box_cb, NULL); return body; } static EPhysics_Body * _letter_body_circle_add(EPhysics_World *world, Evas_Object *image) { EPhysics_Body *body = ephysics_body_cylinder_add(world); _letter_body_setup_common(body, image); ephysics_body_event_callback_add (body, EPHYSICS_CALLBACK_BODY_UPDATE, _update_circle_cb, NULL); return body; } EAPI_MAIN int elm_main(int argc __UNUSED__, char **argv __UNUSED__) { Evas_Object *win, *bg, *image, *light, *shadow; EPhysics_Body *ground_body, *letter_body; EPhysics_World *world; unsigned int i = 0; int x, w, h, sh_w; Evas *evas; struct letter_desc { const char *letter; int padding; } falling_letters[] = { {"P", PADDING_X_1}, {"H", PADDING_X_1}, {"Y", PADDING_X_3}, {"S1", PADDING_X_2}, {"I", PADDING_X_2}, {"C", PADDING_X_3}, {"S2", 0} }; if (!ephysics_init()) return - 1; elm_policy_set(ELM_POLICY_QUIT, ELM_POLICY_QUIT_LAST_WINDOW_CLOSED); win = elm_win_add(NULL, "main", ELM_WIN_SPLASH); elm_win_title_set(win, "EPhysics Logo"); elm_win_autodel_set(win, EINA_TRUE); evas_object_show(win); bg = elm_bg_add(win); elm_bg_file_set(bg, PACKAGE_DATA_DIR "/logo_background.png", NULL); elm_win_resize_object_add(win, bg); evas_object_size_hint_min_set(bg, WIDTH, HEIGHT); evas_object_size_hint_max_set(bg, WIDTH, HEIGHT); evas_object_show(bg); world = ephysics_world_new(); ephysics_world_render_geometry_set(world, 0, 0, -50, WIDTH, HEIGHT, DEPTH); ground_body = ephysics_body_box_add(world); ephysics_body_mass_set(ground_body, EPHYSICS_BODY_MASS_STATIC); ephysics_body_geometry_set(ground_body, -100, FLOOR_Y, -15, WIDTH + 800, 10, 30); ephysics_body_restitution_set(ground_body, 0.65); ephysics_body_friction_set(ground_body, 0.8); evas = evas_object_evas_get(win); x = OFFSET_X; for (i = 0; i < EINA_C_ARRAY_LENGTH(falling_letters); i++) { _letter_add(evas, falling_letters[i].letter, &image, &light, &shadow); evas_object_image_size_get(shadow, &sh_w, NULL); evas_object_image_size_get(image, &w, &h); /* place image and light on top, above what the viewport can show */ evas_object_move(image, x, -h * (i + 1) - 50); evas_object_move(light, x, -h * (i + 1) - 50); /* place shadow below the hit-line: FLOOR_Y, centered at image */ evas_object_move(shadow, x + CENTER(w, sh_w), FLOOR_Y); x += falling_letters[i].padding + w; letter_body = _letter_body_box_add(world, image); ephysics_body_friction_set(letter_body, 0.4); } /* E is a circle that comes rolling on the floor */ _letter_add(evas, "E", &image, &light, &shadow); evas_object_color_set(shadow, 255, 255, 255, 255); evas_object_image_size_get(shadow, &sh_w, NULL); evas_object_image_size_get(image, &w, &h); /* place image and light so they are above the floor, * and to the left of viewport */ evas_object_move(image, -w - 1, FLOOR_Y - h + 1); evas_object_move(light, -w - 1, FLOOR_Y - h + 1); /* place the shadow below the hit-line: FLOOR_Y, centered at image */ evas_object_move(shadow, -w - 1 + CENTER(w, sh_w), FLOOR_Y); letter_body = _letter_body_circle_add(world, image); ephysics_body_friction_set(letter_body, 1); ephysics_body_mass_set(letter_body, 1); ephysics_body_angular_movement_enable_set(letter_body, EINA_FALSE, EINA_FALSE, EINA_TRUE); /* make the "E" logo get into the viewport by applying an horizontal force */ ephysics_body_central_impulse_apply(letter_body, 390, 0, 0); elm_run(); ephysics_world_del(world); ephysics_shutdown(); elm_shutdown(); return 0; } ELM_MAIN()