EPhysics: fix torque impulse

SVN revision: 75473

legacy/ephysics/src/bin/Makefile.am

@@ -31,6 +31,7 @@ test_growing_balls.c \
 test_jumping_balls.c \
 test_no_gravity.c \
 test_rotate.c \
+test_rotating_forever.c \
 test_velocity.c \
 test_shapes.c \
 test_sleeping_threshold.c \

legacy/ephysics/src/bin/test.c

@@ -30,6 +30,7 @@ void test_growing_balls(void *data, Evas_Object *obj, void *event_info);
 void test_jumping_balls(void *data, Evas_Object *obj, void *event_info);
 void test_no_gravity(void *data, Evas_Object *obj, void *event_info);
 void test_rotate(void *data, Evas_Object *obj, void *event_info);
+void test_rotating_forever(void *data, Evas_Object *obj, void *event_info);
 void test_velocity(void *data, Evas_Object *obj, void *event_info);
 void test_shapes(void *data, Evas_Object *obj, void *event_info);
 void test_sleeping(void *data, Evas_Object *obj, void *event_info);
@@ -52,6 +53,7 @@ static const EPhysics_Test tests[] = {
        {"Jumping Balls", test_jumping_balls},
        {"No Gravity", test_no_gravity},
        {"Rotate", test_rotate},
+       {"Rotating Forever", test_rotating_forever},
        {"Velocity", test_velocity},
        {"Shapes", test_shapes},
        {"Sleeping Threshold", test_sleeping},

legacy/ephysics/src/bin/test_rotating_forever.c

@@ -0,0 +1,75 @@
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "ephysics_test.h"
+
+
+static void
+_update_object_cb(void *data __UNUSED__, EPhysics_Body *body, void *event_info __UNUSED__)
+{
+   double rot, vrot;
+
+   rot = ephysics_body_rotation_get(body);
+   vrot = ephysics_body_angular_velocity_get(body);
+   ephysics_body_evas_object_update(body);
+
+   DBG("rot: %lf, vrot :%lf", rot, vrot);
+}
+
+static void
+_world_populate(Test_Data *test_data)
+{
+   EPhysics_Body *body;
+   Evas_Object *cube;
+
+   cube = elm_image_add(test_data->win);
+   elm_image_file_set(
+      cube, PACKAGE_DATA_DIR "/" EPHYSICS_TEST_THEME ".edj", "blue-cube");
+   evas_object_move(cube, WIDTH / 3, HEIGHT / 2 - 30);
+   evas_object_resize(cube, 70, 70);
+   evas_object_show(cube);
+   test_data->evas_objs = eina_list_append(test_data->evas_objs, cube);
+
+   body = ephysics_body_box_add(test_data->world);
+   ephysics_body_evas_object_set(body, cube, EINA_TRUE);
+   test_data->bodies = eina_list_append(test_data->bodies, body);
+   ephysics_body_event_callback_add(body,
+                                    EPHYSICS_CALLBACK_BODY_UPDATE,
+                                    _update_object_cb, NULL);
+
+   ephysics_body_torque_impulse_apply(body, 1);
+}
+
+static void
+_restart(void *data, Evas_Object *obj __UNUSED__, const char *emission __UNUSED__, const char *source __UNUSED__)
+{
+   Test_Data *test_data = data;
+
+   DBG("Restart pressed");
+   test_clean(test_data);
+   _world_populate(test_data);
+}
+
+void
+test_rotating_forever(void *data __UNUSED__, Evas_Object *obj __UNUSED__, void *event_info __UNUSED__)
+{
+   EPhysics_World *world;
+   Test_Data *test_data;
+
+   if (!ephysics_init())
+     return;
+
+   test_data = test_data_new();
+   test_win_add(test_data, "Rotating Forever", EINA_TRUE);
+   elm_object_signal_emit(test_data->layout, "borders,show", "ephysics_test");
+   elm_layout_signal_callback_add(test_data->layout, "restart", "test-theme",
+                                  _restart, test_data);
+
+   world = ephysics_world_new();
+   ephysics_world_render_geometry_set(world, 50, 40, WIDTH - 100, FLOOR_Y - 40);
+   test_data->world = world;
+   ephysics_world_gravity_set(world, 0, 0);
+
+   _world_populate(test_data);
+}

legacy/ephysics/src/lib/EPhysics.h

@@ -2152,6 +2152,10 @@ EAPI void ephysics_body_central_impulse_apply(EPhysics_Body *body, double x, dou
  * Apply a torque impulse over a body.
  *
  * An impulse will be applied over the body to make it rotate around Z axis.
+ * Impulse is the product of the force over the time this force is applied.
+ * In ephysics case, it would be the time of a tick, so it behaves just
+ * summing current angular velocity to the result of a calculation involving
+ * torque impulse and body's inertia.
  *
  * @param body The physics body that will receive the impulse.
  * @param roll Impulse to rotate body around Z axis (rotate on x - y plane).

legacy/ephysics/src/lib/ephysics_body.cpp

@@ -1272,7 +1272,7 @@ ephysics_body_torque_impulse_apply(EPhysics_Body *body, double roll)
      }
 
    body->rigid_body->activate(1);
-   body->rigid_body->applyTorqueImpulse(btVector3(0, 0, roll));
+   body->rigid_body->applyTorqueImpulse(btVector3(0, 0, -roll));
 }
 
 EAPI void