C++ (Cpp) cogl_path_arc Examples

Example #1

static void
circle_paint_cb (ClutterActor *actor)
{
  const CoglColor fill_color = { 0xff, 0xff, 0xff, 0x80 };
  gint i;
  gdouble angle;
  guint radius = clutter_actor_get_width (actor) / 2;

  cogl_set_source_color (&fill_color);

  angle = *((gdouble *)g_object_get_data (G_OBJECT (actor), "angle"));
  for (i = 0; i < CIRCLE_S; i++, angle += (2.0 * G_PI) / (gdouble) CIRCLE_S)
    {
      gdouble angle2 = angle + ((2.0 * G_PI) / (gdouble)CIRCLE_S) / 2.0;
      cogl_path_move_to (((radius - CIRCLE_W) * cos (angle)) + radius,
                         ((radius - CIRCLE_W) * sin (angle)) + radius);
      cogl_path_arc (radius, radius, radius, radius,
                     CLUTTER_ANGLE_FROM_RAD (angle),
                     CLUTTER_ANGLE_FROM_RAD (angle2));
      cogl_path_line_to (((radius - CIRCLE_W) * cos (angle2)) + radius,
                         ((radius - CIRCLE_W) * sin (angle2)) + radius);
      cogl_path_arc (radius, radius, radius - CIRCLE_W, radius - CIRCLE_W,
                     CLUTTER_ANGLE_FROM_RAD (angle2),
                     CLUTTER_ANGLE_FROM_RAD (angle));
      cogl_path_close ();
      cogl_path_fill ();
    }
}

Example #2

File: scene-pulley-joint.c Project: GNOME/clutter-box2d

static void
paint_circle (ClutterActor *actor)
{
  gfloat radius = MIN (clutter_actor_get_width (actor),
                       clutter_actor_get_height (actor)) / 2.f;
  cogl_set_source_color4ub (0xff, 0xff, 0xff, 0xff);
  cogl_path_arc (radius, radius, radius, radius, 0, 360);
  cogl_path_fill ();
}

Example #3

File: champlain-point.c Project: StanciuMarius/Libchamplain-map-wrapping

static void
pick (ClutterActor *self,
    const ClutterColor *color)
{
  ChamplainPointPrivate *priv = GET_PRIVATE (self);
  gdouble radius = priv->size / 2.0;

  cogl_path_new ();

  cogl_set_source_color4ub (color->red,
      color->green,
      color->blue,
      color->alpha);

  cogl_path_move_to (radius, radius);
  cogl_path_arc (radius, radius, radius, radius, 0, 360.0);
  cogl_path_close ();
  cogl_path_fill ();
}

Example #4

File: mnb-fancy-bin.c Project: dudochkin-victor/mutter-netbook

static void
mnb_fancy_bin_paint (ClutterActor *actor)
{
  MnbFancyBin *self = MNB_FANCY_BIN (actor);
  MnbFancyBinPrivate *priv = self->priv;

  /* Draw the clipped child if necessary */
  if (priv->fanciness > 0.0)
    {
      MxPadding padding;
      gfloat width, height;

      clutter_actor_get_size (actor, &width, &height);
      mx_widget_get_padding (MX_WIDGET (actor), &padding);

      /* Create a clip path so that the clone won't poke out
       * from underneath the background.
       */
      cogl_path_new ();
      cogl_path_move_to (padding.left + priv->curve_radius,
                         padding.top);
      cogl_path_arc (width - padding.right - priv->curve_radius,
                     priv->curve_radius + padding.top,
                     priv->curve_radius,
                     priv->curve_radius,
                     270,
                     360);
      cogl_path_arc (width - padding.right - priv->curve_radius,
                     height - padding.bottom - priv->curve_radius,
                     priv->curve_radius,
                     priv->curve_radius,
                     0,
                     90);
      cogl_path_arc (padding.left + priv->curve_radius,
                     height - padding.bottom - priv->curve_radius,
                     priv->curve_radius,
                     priv->curve_radius,
                     90,
                     180);
      cogl_path_arc (padding.left + priv->curve_radius,
                     padding.top + priv->curve_radius,
                     priv->curve_radius,
                     priv->curve_radius,
                     180,
                     270);
      cogl_path_close ();
      cogl_clip_push_from_path ();

      /* Paint child */
      if (priv->child)
        clutter_actor_paint (priv->child);

      cogl_clip_pop ();

      /* Chain up for background */
      CLUTTER_ACTOR_CLASS (mnb_fancy_bin_parent_class)->paint (actor);
    }

  /* Draw the un-fancy child */
  if ((priv->fanciness < 1.0) && priv->clone)
    clutter_actor_paint (priv->clone);
}