test_camera.c

ephysics_test.h

#ifndef _EPHYSICS_PRIVATE_H
#define _EPHYSICS_PRIVATE_H

#include <Edje.h>
#include <Elementary.h>
#include <Eina.h>
#include <Evas.h>

#include "EPhysics.h"

#ifdef EPHYSICS_LOG_COLOR
#undef EPHYSICS_LOG_COLOR
#endif
#define EPHYSICS_LOG_COLOR EINA_COLOR_BLUE

#ifdef ERR
# undef ERR
#endif
#define ERR(...) EINA_LOG_DOM_ERR(_ephysics_test_log_dom, __VA_ARGS__)

#ifdef DBG
# undef DBG
#endif
#define DBG(...) EINA_LOG_DOM_DBG(_ephysics_test_log_dom, __VA_ARGS__)

#ifdef INF
# undef INF
#endif
#define INF(...) EINA_LOG_DOM_INFO(_ephysics_test_log_dom, __VA_ARGS__)

#ifdef WRN
# undef WRN
#endif
#define WRN(...) EINA_LOG_DOM_WARN(_ephysics_test_log_dom, __VA_ARGS__)

#ifdef CRI
# undef CRI
#endif
#define CRI(...) EINA_LOG_DOM_CRIT(_ephysics_test_log_dom, __VA_ARGS__)

#define EPHYSICS_TEST_THEME "ephysics_test"
#define WIDTH (512)
#define HEIGHT (384)
#define DEPTH (100)
#define SHADOW_ALPHA_ID (1)
#define FLOOR_Y (344)
#define FLOOR_WIDTH (750)
#define SH_THRESHOLD (200)

#ifdef __cplusplus
extern "C" {
#endif

extern int _ephysics_test_log_dom;

typedef struct _Test_Data Test_Data;

struct _Test_Data {
     EPhysics_World *world;
     Evas_Object *layout;
     Evas_Object *win;
     Eina_List *constraints;
     Eina_List *evas_objs;
     Eina_List *bodies;
     void *data;
};

Test_Data *test_data_new(void);
void test_data_del(Test_Data *test_data);

void test_clean(Test_Data *test_data);

void test_win_add(Test_Data *test_data, const char *title, Eina_Bool autodel);

void update_object_cb(void *data, EPhysics_Body *body, void *event_info);

#ifdef __cplusplus
}
#endif

#endif

test_camera.c

test_clean(Test_Data *test_data)
{
   EPhysics_Constraint *constraint;
   Evas_Object *evas_obj;
   EPhysics_Body *body;

   EINA_LIST_FREE(test_data->constraints, constraint)
      ephysics_constraint_del(constraint);

   EINA_LIST_FREE(test_data->bodies, body)
      ephysics_body_del(body);

   EINA_LIST_FREE(test_data->evas_objs, evas_obj)
      evas_object_del(evas_obj);
}

test_win_add(Test_Data *test_data, const char *title, Eina_Bool autodel)
{
   Evas_Object *win, *ly;

   win = elm_win_add(NULL, title, ELM_WIN_BASIC);
   elm_win_title_set(win, title);
   elm_win_autodel_set(win, EINA_TRUE);
   evas_object_show(win);
   test_data->win = win;
   if (autodel)
     evas_object_event_callback_add(win, EVAS_CALLBACK_DEL,
                                    _subwin_del_cb, test_data);

   ly = elm_layout_add(win);
   elm_win_resize_object_add(win, ly);
   evas_object_size_hint_min_set(ly, WIDTH, HEIGHT);
   evas_object_size_hint_max_set(ly, WIDTH, HEIGHT);
   elm_layout_file_set(ly, PACKAGE_DATA_DIR "/" EPHYSICS_TEST_THEME ".edj",
                       "frame");
   evas_object_show(ly);
   test_data->layout = ly;
}

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include "ephysics_test.h"

typedef struct _Camera_Data Camera_Data;

struct _Camera_Data {
     Test_Data base;
     Ecore_Animator *animator;
     int old_x;
};

static void
_update_floor(Evas_Object *floor_obj, Evas_Coord delta)
{
   int fx, x, y;

   evas_object_geometry_get(floor_obj, &x, &y, NULL, NULL);
   fx = x + delta;
   if (fx < -FLOOR_WIDTH)
     fx += 2 * FLOOR_WIDTH;
   evas_object_move(floor_obj, fx, y);
}

static void
_camera_moved_cb(void *data, EPhysics_World *world __UNUSED__, void *event_info)
{
   EPhysics_Camera *camera = event_info;
   Camera_Data *camera_data = data;
   Evas_Object *floor_obj;
   int x;

   DBG("Camera moved");

   ephysics_camera_position_get(camera, &x, NULL);

   floor_obj = evas_object_data_get(camera_data->base.layout, "floor");
   _update_floor(floor_obj, camera_data->old_x - x);

   floor_obj = evas_object_data_get(camera_data->base.layout, "floor2");
   _update_floor(floor_obj, camera_data->old_x - x);

   camera_data->old_x = x;
}

static Eina_Bool
_camera_move_cb(void *data)
{
   Camera_Data *camera_data = data;
   EPhysics_Camera *camera;
   int x, y, w;

   ephysics_world_render_geometry_get(camera_data->base.world,
                                      NULL, NULL, NULL, &w, NULL, NULL);

   camera = ephysics_world_camera_get(camera_data->base.world);
   ephysics_camera_position_get(camera, &x, &y);

   if (x + w > WIDTH * 2)
     {
        camera_data->animator = NULL;
        return EINA_FALSE;
     }

   x += 2;
   ephysics_camera_position_set(camera, x, y);

   return EINA_TRUE;
}

static void
_world_populate(Camera_Data *camera_data)
{
   Evas_Object *sphere, *shadow;
   EPhysics_Body *fall_body;

   shadow = elm_layout_add(camera_data->base.win);
   elm_layout_file_set(
      shadow, PACKAGE_DATA_DIR "/" EPHYSICS_TEST_THEME ".edj", "shadow-ball");
   evas_object_move(shadow, WIDTH / 3, FLOOR_Y);
   evas_object_resize(shadow, 70, 3);
   evas_object_show(shadow);
   camera_data->base.evas_objs = eina_list_append(camera_data->base.evas_objs,
                                                  shadow);

   sphere = elm_image_add(camera_data->base.win);
   elm_image_file_set(
      sphere, PACKAGE_DATA_DIR "/" EPHYSICS_TEST_THEME ".edj",
      "big-blue-ball");
   evas_object_move(sphere, WIDTH / 3, FLOOR_Y - 70);
   evas_object_resize(sphere, 70, 70);
   evas_object_show(sphere);
   camera_data->base.evas_objs = eina_list_append(camera_data->base.evas_objs,
                                                  sphere);

   fall_body = ephysics_body_sphere_add(camera_data->base.world);
   ephysics_body_evas_object_set(fall_body, sphere, EINA_TRUE);
   ephysics_body_restitution_set(fall_body, 0.2);
   ephysics_body_friction_set(fall_body, 1);
   ephysics_body_event_callback_add(fall_body, EPHYSICS_CALLBACK_BODY_UPDATE,
                                    update_object_cb, shadow);
   camera_data->base.bodies = eina_list_append(camera_data->base.bodies,
                                               fall_body);
   ephysics_body_central_impulse_apply(fall_body, 300, 0, 0);

   shadow = elm_layout_add(camera_data->base.win);
   elm_layout_file_set(
      shadow, PACKAGE_DATA_DIR "/" EPHYSICS_TEST_THEME ".edj", "shadow-ball");
   evas_object_move(shadow, WIDTH * 4 / 3, FLOOR_Y);
   evas_object_resize(shadow, 70, 3);
   evas_object_show(shadow);
   camera_data->base.evas_objs = eina_list_append(camera_data->base.evas_objs,
                                                  shadow);

   sphere = elm_image_add(camera_data->base.win);
   elm_image_file_set(
      sphere, PACKAGE_DATA_DIR "/" EPHYSICS_TEST_THEME ".edj", "big-red-ball");
   evas_object_move(sphere, WIDTH * 4 / 3, FLOOR_Y - 70);
   evas_object_resize(sphere, 70, 70);
   evas_object_show(sphere);
   camera_data->base.evas_objs = eina_list_append(camera_data->base.evas_objs,
                                                  sphere);

   fall_body = ephysics_body_sphere_add(camera_data->base.world);
   ephysics_body_mass_set(fall_body, 4.6);
   ephysics_body_evas_object_set(fall_body, sphere, EINA_TRUE);
   ephysics_body_restitution_set(fall_body, 0.12);
   ephysics_body_friction_set(fall_body, 2);
   ephysics_body_event_callback_add(fall_body, EPHYSICS_CALLBACK_BODY_UPDATE,
                                    update_object_cb, shadow);
   camera_data->base.bodies = eina_list_append(camera_data->base.bodies,
                                               fall_body);

   camera_data->animator = ecore_animator_add(_camera_move_cb, camera_data);
}

static void
_win_del(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
{
   Camera_Data *camera_data = data;

   if (camera_data->animator)
     ecore_animator_del(camera_data->animator);

   test_clean((Test_Data *)camera_data);
   evas_object_del(camera_data->base.layout);
   ephysics_world_del(camera_data->base.world);
   free(camera_data);
   ephysics_shutdown();
}

static void
_restart(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
{
   Camera_Data *camera_data = data;
   EPhysics_Camera *camera;
   Evas_Object *floor_obj;

   DBG("Restart pressed");

   if (camera_data->animator)
     ecore_animator_del(camera_data->animator);

   camera = ephysics_world_camera_get(camera_data->base.world);
   ephysics_camera_position_set(camera, 50, 40);

   camera_data->old_x = 0;
   floor_obj = evas_object_data_get(camera_data->base.layout, "floor");
   evas_object_move(floor_obj, 0, FLOOR_Y - 20);
   floor_obj = evas_object_data_get(camera_data->base.layout, "floor2");
   evas_object_move(floor_obj, FLOOR_WIDTH, FLOOR_Y - 20);

   test_clean((Test_Data *)camera_data);
   _world_populate(camera_data);
}

void
test_camera(void *data __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
{
   Camera_Data *camera_data;
   EPhysics_Body *boundary;
   Evas_Object *floor_obj;
   EPhysics_World *world;

   if (!ephysics_init())
     return;

   camera_data = calloc(1, sizeof(Camera_Data));
   if (!camera_data)
     {
        ERR("Failed to create test data");
        ephysics_shutdown();
        return;
     }

   test_win_add((Test_Data *)camera_data, "Camera", EINA_FALSE);
   evas_object_event_callback_add(camera_data->base.win, EVAS_CALLBACK_DEL,
                                  _win_del, camera_data);

   elm_layout_signal_callback_add(camera_data->base.layout, "restart",
                                  "test-theme", _restart, camera_data);

   floor_obj = elm_image_add(camera_data->base.win);
   elm_image_file_set(
      floor_obj, PACKAGE_DATA_DIR "/" EPHYSICS_TEST_THEME ".edj", "floor");
   evas_object_move(floor_obj, 0, FLOOR_Y - 20);
   evas_object_resize(floor_obj, FLOOR_WIDTH, 224);
   evas_object_show(floor_obj);
   evas_object_data_set(camera_data->base.layout, "floor", floor_obj);

   floor_obj = elm_image_add(camera_data->base.win);
   elm_image_file_set(
      floor_obj, PACKAGE_DATA_DIR "/" EPHYSICS_TEST_THEME ".edj", "floor");
   evas_object_move(floor_obj, FLOOR_WIDTH, FLOOR_Y - 20);
   evas_object_resize(floor_obj, FLOOR_WIDTH, 224);
   evas_object_show(floor_obj);
   evas_object_data_set(camera_data->base.layout, "floor2", floor_obj);

   world = ephysics_world_new();
   ephysics_world_render_geometry_set(world, 50, 40, -50,
                                      WIDTH - 100, FLOOR_Y - 40, DEPTH);
   ephysics_world_event_callback_add(world,
                                     EPHYSICS_CALLBACK_WORLD_CAMERA_MOVED,
                                     _camera_moved_cb, camera_data);
   camera_data->base.world = world;

   boundary = ephysics_body_box_add(camera_data->base.world);
   ephysics_body_mass_set(boundary, 0);
   ephysics_body_geometry_set(boundary, 0, FLOOR_Y, -15, WIDTH * 2, 10, 30);
   ephysics_body_restitution_set(boundary, 0.65);
   ephysics_body_friction_set(boundary, 4);

   _world_populate(camera_data);
}