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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);
}