test_velocity.c

- Main Page
- Related Pages
- Modules
- Data Structures
- Files
- Examples

test_velocity.c
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include "ephysics_test.h"
typedef struct _Velocity_Data Velocity_Data;
struct _Velocity_Data {
Test_Data base;
EPhysics_Body *body;
double old_vx;
double old_vy;
double old_vaz;
double last_time;
};
static Eina_Bool
_on_keydown(void *data, Evas_Object *obj __UNUSED__, Evas_Object *src __UNUSED__, Evas_Callback_Type type, void *event_info)
{
Evas_Event_Key_Down *ev = event_info;
EPhysics_Body *body = data;
if (type != EVAS_CALLBACK_KEY_UP)
return EINA_FALSE;
if (strcmp(ev->key, "Up") == 0)
ephysics_body_central_impulse_apply(body, 0, -300, 0);
else if (strcmp(ev->key, "Down") == 0)
ephysics_body_central_impulse_apply(body, 0, 300, 0);
else if (strcmp(ev->key, "Right") == 0)
ephysics_body_central_impulse_apply(body, 300, 0, 0);
else if (strcmp(ev->key, "Left") == 0)
ephysics_body_central_impulse_apply(body, -300, 0, 0);
return EINA_TRUE;
}
static void
_update_vel_cb(void *data, EPhysics_Body *body, void *event_info __UNUSED__)
{
Velocity_Data *velocity_data = data;
Eina_Bool first_call = EINA_FALSE;
double vx, vy, ax, ay, vaz, aaz;
double time_now, delta_time;
char buff[64];
if (!velocity_data->last_time)
first_call = EINA_TRUE;
time_now = ecore_time_get();
delta_time = time_now - velocity_data->last_time;
velocity_data->last_time = time_now;
ephysics_body_angular_velocity_get(body, NULL, NULL, &vaz);
ephysics_body_linear_velocity_get(body, &vx, &vy, NULL);
vx = (vx > 0 || vx <= -0.01) ? vx : 0;
vy = (vy > 0 || vy <= -0.01) ? vy : 0;
aaz = (vaz - velocity_data->old_vaz) / delta_time;
velocity_data->old_vaz = vaz;
ax = (vx - velocity_data->old_vx) / delta_time;
velocity_data->old_vx = vx;
ay = (vy - velocity_data->old_vy) / delta_time;
velocity_data->old_vy = vy;
if (first_call) return;
DBG("Delta Time: %0.3lf", delta_time);
snprintf(buff, sizeof(buff), "Linear velocity: %.2f, %.2f", vx, vy);
elm_layout_text_set(velocity_data->base.layout, "linear_vel", buff);
snprintf(buff, sizeof(buff), "Linear acceleration: %.2f, %.2f", ax, ay);
elm_layout_text_set(velocity_data->base.layout, "linear_acc", buff);
DBG("Vx: %0.3lf p/s Ax: %0.3lf p/s/s", vx, ax);
DBG("Vy: %0.3lf p/s Ay: %0.3lf p/s/s", vy, ay);
snprintf(buff, sizeof(buff), "Angular velocity: %.2f", vaz);
elm_layout_text_set(velocity_data->base.layout, "angular_vel", buff);
snprintf(buff, sizeof(buff), "Angular acceleration: %.2f", aaz);
elm_layout_text_set(velocity_data->base.layout, "angular_acc", buff);
DBG("Va: %0.3lf d/s Aa: %0.3lf d/s/s", vaz, aaz);
}
static void
_world_populate(Velocity_Data *velocity_data)
{
Evas_Object *sphere, *shadow;
EPhysics_Body *sphere_body;
shadow = elm_layout_add(velocity_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, 54, 3);
evas_object_show(shadow);
velocity_data->base.evas_objs = eina_list_append(
velocity_data->base.evas_objs, shadow);
sphere = elm_image_add(velocity_data->base.win);
elm_image_file_set(
sphere, PACKAGE_DATA_DIR "/" EPHYSICS_TEST_THEME ".edj", "red-ball");
evas_object_move(sphere, WIDTH / 3, FLOOR_Y - 54);
evas_object_resize(sphere, 54, 54);
evas_object_show(sphere);
velocity_data->base.evas_objs = eina_list_append(
velocity_data->base.evas_objs, sphere);
sphere_body = ephysics_body_sphere_add(velocity_data->base.world);
ephysics_body_evas_object_set(sphere_body, sphere, EINA_TRUE);
ephysics_body_restitution_set(sphere_body, 0.8);
ephysics_body_friction_set(sphere_body, 1);
ephysics_body_sleeping_threshold_set(sphere_body, 0, 0);
ephysics_body_damping_set(sphere_body, 0.2, 0.2);
ephysics_body_event_callback_add(sphere_body, EPHYSICS_CALLBACK_BODY_UPDATE,
update_object_cb, shadow);
ephysics_body_event_callback_add(sphere_body, EPHYSICS_CALLBACK_BODY_UPDATE,
_update_vel_cb, velocity_data);
ephysics_body_event_callback_add(sphere_body, EPHYSICS_CALLBACK_BODY_STOPPED,
_update_vel_cb, velocity_data);
velocity_data->base.bodies = eina_list_append(velocity_data->base.bodies,
sphere_body);
velocity_data->body = sphere_body;
}
static void
_restart(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
{
Velocity_Data *velocity_data = data;
elm_object_event_callback_del(velocity_data->base.win, _on_keydown,
velocity_data->body);
DBG("Restart pressed");
test_clean((Test_Data *)velocity_data);
_world_populate(velocity_data);
velocity_data->old_vx = 0;
velocity_data->old_vy = 0;
velocity_data->old_vaz = 0;
velocity_data->last_time = 0;
elm_object_event_callback_add(velocity_data->base.win, _on_keydown,
velocity_data->body);
}
static void
_win_del(void *data, Evas *e __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
{
Velocity_Data *velocity_data = data;
test_clean((Test_Data *)velocity_data);
evas_object_del(velocity_data->base.layout);
ephysics_world_del(velocity_data->base.world);
free(velocity_data);
ephysics_shutdown();
}
void
test_velocity(void *data __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
{
Velocity_Data *velocity_data;
EPhysics_Body *boundary;
EPhysics_World *world;
if (!ephysics_init())
return;
velocity_data = calloc(1, sizeof(Velocity_Data));
if (!velocity_data)
{
ERR("Failed to create test data");
ephysics_shutdown();
return;
}
test_win_add((Test_Data *)velocity_data, "Velocity Getters", EINA_FALSE);
evas_object_event_callback_add(velocity_data->base.win, EVAS_CALLBACK_DEL,
_win_del, velocity_data);
elm_layout_signal_callback_add(velocity_data->base.layout, "restart",
"test-theme", _restart, velocity_data);
elm_object_signal_emit(velocity_data->base.layout, "borders,show",
"ephysics_test");
elm_object_signal_emit(velocity_data->base.layout, "arrows,show",
"ephysics_test");
elm_object_signal_emit(velocity_data->base.layout, "velocity,show",
"ephysics_test");
world = ephysics_world_new();
ephysics_world_render_geometry_set(world, 50, 40, -50,
WIDTH - 100, FLOOR_Y - 40, DEPTH);
velocity_data->base.world = world;
boundary = ephysics_body_bottom_boundary_add(velocity_data->base.world);
ephysics_body_restitution_set(boundary, 0.65);
ephysics_body_friction_set(boundary, 4);
boundary = ephysics_body_right_boundary_add(velocity_data->base.world);
ephysics_body_restitution_set(boundary, 0.4);
ephysics_body_friction_set(boundary, 3);
boundary = ephysics_body_left_boundary_add(velocity_data->base.world);
ephysics_body_restitution_set(boundary, 0.4);
ephysics_body_friction_set(boundary, 3);
ephysics_body_top_boundary_add(velocity_data->base.world);
_world_populate(velocity_data);
elm_object_event_callback_add(velocity_data->base.win, _on_keydown,
velocity_data->body);
}
Evas_Callback_Type
Evas_Callback_Type
Identifier of callbacks to be set for Evas canvases or Evas objects.
Definition: Evas_Common.h:419
EVAS_CALLBACK_DEL
@ EVAS_CALLBACK_DEL
Object Being Deleted (called before Free)
Definition: Evas_Common.h:439
EVAS_CALLBACK_KEY_UP
@ EVAS_CALLBACK_KEY_UP
Key Release Event.
Definition: Evas_Common.h:431
ephysics_body_damping_set
EAPI void ephysics_body_damping_set(EPhysics_Body *body, double linear_damping, double angular_damping)
Set the angular and linear damping values.
ephysics_body_evas_object_set
EAPI void ephysics_body_evas_object_set(EPhysics_Body *body, Evas_Object *evas_obj, Eina_Bool use_obj_pos)
Set an evas object to a physics body.
ephysics_body_bottom_boundary_add
EAPI EPhysics_Body * ephysics_body_bottom_boundary_add(EPhysics_World *world)
Create a physic bottom boundary.
ephysics_body_linear_velocity_get
EAPI void ephysics_body_linear_velocity_get(const EPhysics_Body *body, double *x, double *y, double *z)
Get body's linear velocity on x, y and z axes.
ephysics_body_angular_velocity_get
EAPI void ephysics_body_angular_velocity_get(const EPhysics_Body *body, double *x, double *y, double *z)
Get body's angular velocity on x, y and z axes.
ephysics_body_top_boundary_add
EAPI EPhysics_Body * ephysics_body_top_boundary_add(EPhysics_World *world)
Create a physic top boundary.
ephysics_body_left_boundary_add
EAPI EPhysics_Body * ephysics_body_left_boundary_add(EPhysics_World *world)
Create a physic left boundary.
ephysics_body_restitution_set
EAPI void ephysics_body_restitution_set(EPhysics_Body *body, double restitution)
Set body's coefficient of restitution.
ephysics_body_central_impulse_apply
EAPI void ephysics_body_central_impulse_apply(EPhysics_Body *body, double x, double y, double z)
Apply an impulse on the center of a body.
ephysics_body_friction_set
EAPI void ephysics_body_friction_set(EPhysics_Body *body, double friction)
Set body's friction.
ephysics_body_sphere_add
EAPI EPhysics_Body * ephysics_body_sphere_add(EPhysics_World *world)
Create a new sphere physics body.
ephysics_body_right_boundary_add
EAPI EPhysics_Body * ephysics_body_right_boundary_add(EPhysics_World *world)
Create a physic right boundary.
ephysics_body_sleeping_threshold_set
EAPI void ephysics_body_sleeping_threshold_set(EPhysics_Body *body, double linear_threshold, double angular_threshold)
Set the linear and angular sleeping threshold.
ephysics_body_event_callback_add
EAPI void ephysics_body_event_callback_add(EPhysics_Body *body, EPhysics_Callback_Body_Type type, EPhysics_Body_Event_Cb func, const void *data)
Register a callback to a type of physics body event.
EPhysics_Body
struct _EPhysics_Body EPhysics_Body
Body handle, represents an object on EPhysics world.
Definition: EPhysics.h:655
EPHYSICS_CALLBACK_BODY_UPDATE
@ EPHYSICS_CALLBACK_BODY_UPDATE
Body being updated.
Definition: EPhysics.h:2263
EPHYSICS_CALLBACK_BODY_STOPPED
@ EPHYSICS_CALLBACK_BODY_STOPPED
Body is not moving any more.
Definition: EPhysics.h:2266
ephysics_world_new
EAPI EPhysics_World * ephysics_world_new(void)
Create a new physics world.
EPhysics_World
struct _EPhysics_World EPhysics_World
World handle, most basic type of EPhysics.
Definition: EPhysics.h:901
ephysics_world_del
EAPI void ephysics_world_del(EPhysics_World *world)
Deletes a physics world.
ephysics_world_render_geometry_set
EAPI void ephysics_world_render_geometry_set(EPhysics_World *world, Evas_Coord x, Evas_Coord y, Evas_Coord z, Evas_Coord w, Evas_Coord h, Evas_Coord d)
Set dimensions of rendered area to be take on account by default updates.
ephysics_shutdown
EAPI int ephysics_shutdown(void)
Shutdown EPhysics.
ephysics_init
EAPI int ephysics_init(void)
Initialize EPhysics.
ecore_time_get
double ecore_time_get(void)
Retrieves the current system time as a floating point value in seconds.
Definition: ecore_time.c:33
eina_list_append
EINA_API Eina_List * eina_list_append(Eina_List *list, const void *data)
Appends the given data to the given linked list.
Definition: eina_list.c:584
EINA_TRUE
#define EINA_TRUE
boolean value TRUE (numerical value 1)
Definition: eina_types.h:539
EINA_FALSE
#define EINA_FALSE
boolean value FALSE (numerical value 0)
Definition: eina_types.h:533
Eina_Bool
unsigned char Eina_Bool
Type to mimic a boolean.
Definition: eina_types.h:527
elm_object_signal_emit
void elm_object_signal_emit(Evas_Object *obj, const char *emission, const char *source)
Send a signal to the widget edje object.
Definition: elm_main.c:1854
elm_object_event_callback_del
void * elm_object_event_callback_del(Evas_Object *obj, Elm_Event_Cb func, const void *data)
Remove an event callback from a widget.
Definition: elm_main.c:1887
elm_object_event_callback_add
void elm_object_event_callback_add(Evas_Object *obj, Elm_Event_Cb func, const void *data)
Add a callback for input events (key up, key down, mouse wheel) on a given Elementary widget.
Definition: elm_main.c:1879
elm_image_add
Evas_Object * elm_image_add(Evas_Object *parent)
Add a new image to the parent.
Definition: efl_ui_image.c:2735
elm_image_file_set
Eina_Bool elm_image_file_set(Evas_Object *obj, const char *file, const char *group)
Set the file that will be used as the image's source.
Definition: efl_ui_image.c:2435
elm_layout_text_set
Eina_Bool elm_layout_text_set(Eo *obj, const char *part, const char *text)
Set the text of the given part.
Definition: efl_ui_layout.c:3162
elm_layout_add
Evas_Object * elm_layout_add(Evas_Object *parent)
Add a new layout to the parent.
Definition: efl_ui_layout.c:3067
elm_layout_file_set
Eina_Bool elm_layout_file_set(Eo *obj, const char *file, const char *group)
Set the file that will be used as layout.
Definition: efl_ui_layout.c:3074
elm_layout_signal_callback_add
void elm_layout_signal_callback_add(Eo *obj, const char *emission, const char *source, Edje_Signal_Cb func, void *data)
Add a callback for a (Edje) signal emitted by a layout widget's underlying Edje object.
Definition: efl_ui_layout.c:3316
Evas
Eo Evas
An opaque handle to an Evas canvas.
Definition: Evas_Common.h:163
evas_object_show
EVAS_API void evas_object_show(Evas_Object *eo_obj)
Makes the given Evas object visible.
Definition: evas_object_main.c:1814
evas_object_del
EVAS_API void evas_object_del(Evas_Object *obj)
Marks the given Evas object for deletion (when Evas will free its memory).
Definition: evas_object_main.c:928
evas_object_event_callback_add
EVAS_API void evas_object_event_callback_add(Evas_Object *eo_obj, Evas_Callback_Type type, Evas_Object_Event_Cb func, const void *data)
Add (register) a callback function to a given Evas object event.
Definition: evas_callbacks.c:478
evas_object_move
EVAS_API void evas_object_move(Evas_Object *obj, Evas_Coord x, Evas_Coord y)
Move the given Evas object to the given location inside its canvas' viewport.
Definition: evas_object_main.c:1171
Evas_Object
Efl_Canvas_Object Evas_Object
An Evas Object handle.
Definition: Evas_Common.h:185
evas_object_resize
EVAS_API void evas_object_resize(Evas_Object *obj, Evas_Coord w, Evas_Coord h)
Changes the size of the given Evas object.
Definition: evas_object_main.c:1236
_Evas_Event_Key_Down
Key press event.
Definition: Evas_Legacy.h:314
_Evas_Event_Key_Down::key
const char * key
The logical key : (eg shift+1 == exclamation)
Definition: Evas_Legacy.h:320