static VALUE
rbclt_path_constraint_initialize (VALUE self, VALUE path, VALUE offset)
{
ClutterPath *g_path = CLUTTER_PATH (RVAL2GOBJ (path));
rbclt_initialize_unowned (self, clutter_path_constraint_new (g_path, NUM2DBL (offset)));
return Qnil;
}
int
main (int argc,
char *argv[])
{
ClutterActor *stage;
ClutterPath *path;
ClutterConstraint *constraint;
ClutterActor *rectangle;
ClutterTimeline *timeline;
const ClutterColor *stage_color = clutter_color_new (51, 51, 85, 255);
const ClutterColor *red_color = clutter_color_new (255, 0, 0, 255);
clutter_init (&argc, &argv);
stage = clutter_stage_new ();
clutter_actor_set_size (stage, 360, 300);
clutter_stage_set_color (CLUTTER_STAGE (stage), stage_color);
g_signal_connect (stage, "destroy", G_CALLBACK (clutter_main_quit), NULL);
/* create the path */
path = clutter_path_new ();
clutter_path_add_move_to (path, 30, 60);
/* add a curve round to the top-right of the stage */
clutter_path_add_rel_curve_to (path,
120, 180,
180, 120,
240, 0);
/* create a constraint based on the path */
constraint = clutter_path_constraint_new (path, 0.0);
/* put a rectangle at the start of the path */
rectangle = clutter_rectangle_new_with_color (red_color);
clutter_actor_set_size (rectangle, 60, 60);
/* add the constraint to the rectangle */
clutter_actor_add_constraint_with_name (rectangle, "path", constraint);
/* add the rectangle to the stage */
clutter_container_add_actor (CLUTTER_CONTAINER (stage), rectangle);
/* set up the timeline */
timeline = clutter_timeline_new (1000);
clutter_timeline_set_loop (timeline, TRUE);
clutter_timeline_set_auto_reverse (timeline, TRUE);
clutter_actor_animate_with_timeline (rectangle, CLUTTER_LINEAR, timeline,
"@constraints.path.offset", 1.0,
NULL);
clutter_actor_show (stage);
clutter_main ();
return EXIT_SUCCESS;
}