test_collision_detection.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_collision_detection.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 _Collision_Data Collision_Data;
 
struct _Collision_Data {
     Test_Data base;
     Evas_Object *impact;
     EPhysics_Body *sphere;
     EPhysics_Body *sphere2;
};
 
static void
_collision_cb(void *data, EPhysics_Body *body __UNUSED__, void *event_info)
{
   EPhysics_Body *contact_body;
   Collision_Data *collision_data = data;
   EPhysics_Body_Collision *collision = event_info;
   int x, y, z;
 
   contact_body = ephysics_body_collision_contact_body_get(collision);
   if (contact_body != collision_data->sphere2) return;
 
   ephysics_body_collision_position_get(collision, &x, &y, &z);
 
   evas_object_move(collision_data->impact, x - 10, y - 40);
   elm_object_signal_emit(collision_data->impact, "impact,show",
                          "ephysics_test");
 
   INF("Collision Detected at (%i, %i, %i)", x, y, z);
}
 
static void
_world_populate(Collision_Data *collision_data)
{
   Evas_Object *sphere1, *sphere2, *sh1, *sh2, *impact;
   EPhysics_Body *sphere_body1, *sphere_body2;
 
   sh1 = elm_layout_add(collision_data->base.win);
   elm_layout_file_set(
      sh1, PACKAGE_DATA_DIR "/" EPHYSICS_TEST_THEME ".edj", "shadow-ball");
   evas_object_move(sh1, WIDTH / 2, FLOOR_Y);
   evas_object_resize(sh1, 70, 3);
   evas_object_show(sh1);
   collision_data->base.evas_objs = eina_list_append(
      collision_data->base.evas_objs, sh1);
 
   sphere1 = elm_image_add(collision_data->base.win);
   elm_image_file_set(
      sphere1, PACKAGE_DATA_DIR "/" EPHYSICS_TEST_THEME ".edj",
      "big-blue-ball");
   evas_object_move(sphere1, WIDTH / 2, FLOOR_Y - 70 + 1);
   evas_object_resize(sphere1, 70, 70);
   evas_object_show(sphere1);
   collision_data->base.evas_objs = eina_list_append(
      collision_data->base.evas_objs, sphere1);
 
   sphere_body1 = ephysics_body_sphere_add(collision_data->base.world);
   ephysics_body_evas_object_set(sphere_body1, sphere1, EINA_TRUE);
   ephysics_body_event_callback_add(sphere_body1,
                                    EPHYSICS_CALLBACK_BODY_UPDATE,
                                    update_object_cb, sh1);
   ephysics_body_restitution_set(sphere_body1, 0.8);
   ephysics_body_friction_set(sphere_body1, 0.4);
   collision_data->base.bodies = eina_list_append(
      collision_data->base.bodies, sphere_body1);
   collision_data->sphere = sphere_body1;
 
   sh2 = elm_layout_add(collision_data->base.win);
   elm_layout_file_set(
      sh2, PACKAGE_DATA_DIR "/" EPHYSICS_TEST_THEME ".edj", "shadow-ball");
   evas_object_move(sh2, WIDTH / 8, FLOOR_Y);
   evas_object_resize(sh2, 70, 3);
   evas_object_show(sh2);
   collision_data->base.evas_objs = eina_list_append(
      collision_data->base.evas_objs, sh2);
 
   sphere2 = elm_image_add(collision_data->base.win);
   elm_image_file_set(
      sphere2, PACKAGE_DATA_DIR "/" EPHYSICS_TEST_THEME ".edj",
      "big-red-ball");
   evas_object_move(sphere2, WIDTH / 8, FLOOR_Y - 70 + 1);
   evas_object_resize(sphere2, 70, 70);
   evas_object_show(sphere2);
   collision_data->base.evas_objs = eina_list_append(
      collision_data->base.evas_objs, sphere2);
 
   sphere_body2 = ephysics_body_sphere_add(collision_data->base.world);
   ephysics_body_evas_object_set(sphere_body2, sphere2, EINA_TRUE);
   ephysics_body_event_callback_add(sphere_body2,
                                    EPHYSICS_CALLBACK_BODY_UPDATE,
                                    update_object_cb, sh2);
   ephysics_body_restitution_set(sphere_body2, 1);
   ephysics_body_friction_set(sphere_body2, 0.4);
   ephysics_body_central_impulse_apply(sphere_body2, 360, 0, 0);
   collision_data->sphere2 = sphere_body2;
   collision_data->base.bodies = eina_list_append(
      collision_data->base.bodies, sphere_body2);
 
   impact = elm_layout_add(collision_data->base.win);
   elm_layout_file_set(
      impact, PACKAGE_DATA_DIR "/" EPHYSICS_TEST_THEME ".edj", "impact");
   evas_object_resize(impact, 20, 20);
   evas_object_show(impact);
   collision_data->base.evas_objs = eina_list_append(
      collision_data->base.evas_objs, impact);
   collision_data->impact = impact;
}
 
static void
_restart(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
{
   Collision_Data *collision_data = data;
 
   DBG("Restart pressed");
   ephysics_body_event_callback_del(collision_data->sphere,
                                    EPHYSICS_CALLBACK_BODY_COLLISION,
                                    _collision_cb);
   test_clean((Test_Data *)collision_data);
   _world_populate(collision_data);
   ephysics_body_event_callback_add(collision_data->sphere,
                                    EPHYSICS_CALLBACK_BODY_COLLISION,
                                    _collision_cb, collision_data);
}
 
static void
_win_del(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
{
   Collision_Data *collision_data = data;
 
   test_clean((Test_Data *)collision_data);
   evas_object_del(collision_data->base.layout);
   ephysics_world_del(collision_data->base.world);
   free(collision_data);
   ephysics_shutdown();
}
 
void
test_collision(void *data __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
{
   Collision_Data *collision_data;
   EPhysics_Body *boundary;
   EPhysics_World *world;
 
   if (!ephysics_init())
     return;
 
   collision_data = calloc(1, sizeof(Collision_Data));
   if (!collision_data)
     {
        ERR("Failed to create test data");
        ephysics_shutdown();
        return;
     }
 
   test_win_add((Test_Data *)collision_data, "Collision Detection", EINA_FALSE);
   elm_object_signal_emit(collision_data->base.layout, "borders,show",
                          "ephysics_test");
   evas_object_event_callback_add(collision_data->base.win, EVAS_CALLBACK_DEL,
                                  _win_del, collision_data);
   elm_layout_signal_callback_add(collision_data->base.layout, "restart",
                                  "test-theme", _restart, collision_data);
 
   world = ephysics_world_new();
   ephysics_world_render_geometry_set(world, 50, 40, -50,
                                      WIDTH - 100, FLOOR_Y - 40, DEPTH);
   collision_data->base.world = world;
 
   boundary = ephysics_body_bottom_boundary_add(collision_data->base.world);
   ephysics_body_restitution_set(boundary, 0);
   ephysics_body_friction_set(boundary, 20);
 
   boundary = ephysics_body_right_boundary_add(collision_data->base.world);
   ephysics_body_restitution_set(boundary, 0.8);
 
   ephysics_body_left_boundary_add(collision_data->base.world);
   ephysics_body_top_boundary_add(collision_data->base.world);
 
   _world_populate(collision_data);
 
   ephysics_body_event_callback_add(collision_data->sphere,
                                    EPHYSICS_CALLBACK_BODY_COLLISION,
                                    _collision_cb, collision_data);
}