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mutter/clutter/clutter-behaviour-ellipse.c
Emmanuele Bassi fd27ca7398 Mark property strings for translation 
Both the nick and the blurb fields should be translatable, for UI
builders and other introspection-based tools.
2010-07-15 14:07:07 +01:00

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/* -*- mode:C; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Tomas Frydrych <tf@openedhand.com>
*
* Copyright (C) 2007 OpenedHand Ltd
* Copyright (C) 2009 Intel Corp.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*/
/**
* SECTION:clutter-behaviour-ellipse
* @short_description: A behaviour interpolating position along an ellipse
*
* #ClutterBehaviourEllipse interpolates actors along a path defined by
* an ellipse.
*
* <note><para>When applying an ellipse behaviour to an actor, the
* behaviour will update the actor's position and depth and set them
* to what is dictated by the ellipses initial position.</para></note>
*
* Since: 0.4
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-fixed.h"
#include "clutter-marshal.h"
#include "clutter-behaviour-ellipse.h"
#include "clutter-debug.h"
#include "clutter-enum-types.h"
#include "clutter-private.h"
#include <stdlib.h>
#include <memory.h>
G_DEFINE_TYPE (ClutterBehaviourEllipse,
clutter_behaviour_ellipse,
CLUTTER_TYPE_BEHAVIOUR);
#define CLUTTER_BEHAVIOUR_ELLIPSE_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
CLUTTER_TYPE_BEHAVIOUR_ELLIPSE, \
ClutterBehaviourEllipsePrivate))
enum
{
PROP_0,
PROP_CENTER,
PROP_WIDTH,
PROP_HEIGHT,
PROP_ANGLE_START,
PROP_ANGLE_END,
PROP_ANGLE_TILT_X,
PROP_ANGLE_TILT_Y,
PROP_ANGLE_TILT_Z,
PROP_DIRECTION,
};
struct _ClutterBehaviourEllipsePrivate
{
ClutterKnot center;
/* a = width / 2 */
gint a;
/* b = height / 2 */
gint b;
gdouble angle_start;
gdouble angle_end;
gdouble angle_tilt_x;
gdouble angle_tilt_y;
gdouble angle_tilt_z;
ClutterRotateDirection direction;
};
typedef struct _knot3d
{
gint x;
gint y;
gint z;
} knot3d;
static void
clutter_behaviour_ellipse_advance (ClutterBehaviourEllipse *e,
float angle,
knot3d *knot)
{
ClutterBehaviourEllipsePrivate *priv = e->priv;
gint x, y, z;
x = priv->a * cosf (angle * (G_PI / 180.0));
y = priv->b * sinf (angle * (G_PI / 180.0));
z = 0;
if (priv->angle_tilt_z)
{
/*
* x2 = r * cos (angle + tilt_z)
* y2 = r * sin (angle + tilt_z)
*
* These can be trasformed to the formulas below using properties of
* sin (a + b) and cos (a + b)
*
*/
gfloat x2, y2;
x2 = x * cosf (priv->angle_tilt_z * (G_PI / 180.0))
- y * sinf (priv->angle_tilt_z * (G_PI / 180.0));
y2 = y * cosf (priv->angle_tilt_z * (G_PI / 180.0))
+ x * sinf (priv->angle_tilt_z * (G_PI / 180.0));
x = (x2);
y = (y2);
}
if (priv->angle_tilt_x)
{
gfloat z2, y2;
z2 = - y * sinf (priv->angle_tilt_x * (G_PI / 180.0));
y2 = y * cosf (priv->angle_tilt_x * (G_PI / 180.0));
z = z2;
y = y2;
}
if (priv->angle_tilt_y)
{
gfloat x2, z2;
x2 = x * cosf (priv->angle_tilt_y * (G_PI / 180.0))
- z * sinf (priv->angle_tilt_y * (G_PI / 180.0));
z2 = z * cosf (priv->angle_tilt_y * (G_PI / 180.0))
+ x * sinf (priv->angle_tilt_y * (G_PI / 180.0));
x = x2;
z = z2;
}
knot->x = x;
knot->y = y;
knot->z = z;
CLUTTER_NOTE (BEHAVIOUR, "advancing to angle %.2f [%d, %d] (a: %d, b: %d)",
angle,
knot->x, knot->y,
priv->a, priv->b);
}
static void
actor_apply_knot_foreach (ClutterBehaviour *behave,
ClutterActor *actor,
gpointer data)
{
ClutterBehaviourEllipsePrivate *priv;
knot3d *knot = data;
priv = ((ClutterBehaviourEllipse *) behave)->priv;
clutter_actor_set_position (actor, knot->x, knot->y);
if (priv->angle_tilt_x != 0 || priv->angle_tilt_y != 0)
clutter_actor_set_depth (actor, knot->z);
}
static inline float
clamp_angle (float a)
{
gint rounds;
rounds = a / 360;
if (a < 0)
rounds--;
return a - 360 * rounds;
}
static void
clutter_behaviour_ellipse_alpha_notify (ClutterBehaviour *behave,
gdouble alpha)
{
ClutterBehaviourEllipse *self = CLUTTER_BEHAVIOUR_ELLIPSE (behave);
ClutterBehaviourEllipsePrivate *priv = self->priv;
gfloat start, end;
gfloat angle = 0;
knot3d knot;
/* we do everything in single precision because it's easier, even
* though all the parameters are stored in double precision for
* consistency with the equivalent ClutterActor API
*/
start = priv->angle_start;
end = priv->angle_end;
if (priv->direction == CLUTTER_ROTATE_CW && start >= end)
end += 360;
else if (priv->direction == CLUTTER_ROTATE_CCW && start <= end)
end -= 360;
angle = (end - start) * alpha + start;
clutter_behaviour_ellipse_advance (self, angle, &knot);
knot.x += priv->center.x;
knot.y += priv->center.y;
clutter_behaviour_actors_foreach (behave, actor_apply_knot_foreach, &knot);
}
static void
clutter_behaviour_ellipse_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterBehaviourEllipse *el = CLUTTER_BEHAVIOUR_ELLIPSE (gobject);
ClutterBehaviourEllipsePrivate *priv = el->priv;
switch (prop_id)
{
case PROP_ANGLE_START:
priv->angle_start = g_value_get_double (value);
break;
case PROP_ANGLE_END:
priv->angle_end = g_value_get_double (value);
break;
case PROP_ANGLE_TILT_X:
priv->angle_tilt_x = g_value_get_double (value);
break;
case PROP_ANGLE_TILT_Y:
priv->angle_tilt_y = g_value_get_double (value);
break;
case PROP_ANGLE_TILT_Z:
priv->angle_tilt_z = g_value_get_double (value);
break;
case PROP_WIDTH:
clutter_behaviour_ellipse_set_width (el, g_value_get_int (value));
break;
case PROP_HEIGHT:
clutter_behaviour_ellipse_set_height (el, g_value_get_int (value));
break;
case PROP_CENTER:
{
ClutterKnot *knot = g_value_get_boxed (value);
if (knot)
clutter_behaviour_ellipse_set_center (el, knot->x, knot->y);
}
break;
case PROP_DIRECTION:
priv->direction = g_value_get_enum (value);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_behaviour_ellipse_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterBehaviourEllipsePrivate *priv;
priv = CLUTTER_BEHAVIOUR_ELLIPSE (gobject)->priv;
switch (prop_id)
{
case PROP_ANGLE_START:
g_value_set_double (value, priv->angle_start);
break;
case PROP_ANGLE_END:
g_value_set_double (value, priv->angle_end);
break;
case PROP_ANGLE_TILT_X:
g_value_set_double (value, priv->angle_tilt_x);
break;
case PROP_ANGLE_TILT_Y:
g_value_set_double (value, priv->angle_tilt_y);
break;
case PROP_ANGLE_TILT_Z:
g_value_set_double (value, priv->angle_tilt_z);
break;
case PROP_WIDTH:
g_value_set_int (value, (priv->a * 2));
break;
case PROP_HEIGHT:
g_value_set_int (value, (priv->b * 2));
break;
case PROP_CENTER:
g_value_set_boxed (value, &priv->center);
break;
case PROP_DIRECTION:
g_value_set_enum (value, priv->direction);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_behaviour_ellipse_applied (ClutterBehaviour *behave,
ClutterActor *actor)
{
ClutterBehaviourEllipse *e = CLUTTER_BEHAVIOUR_ELLIPSE (behave);
ClutterBehaviourEllipsePrivate *priv = e->priv;
knot3d knot = { 0, };
clutter_behaviour_ellipse_advance (e, priv->angle_start, &knot);
clutter_actor_set_position (actor, knot.x, knot.y);
/* the depth should be changed only if there is a tilt on
* any of the X or the Y axis
*/
if (priv->angle_tilt_x != 0 || priv->angle_tilt_y != 0)
clutter_actor_set_depth (actor, knot.z);
}
static void
clutter_behaviour_ellipse_class_init (ClutterBehaviourEllipseClass *klass)
{
GObjectClass *object_class = G_OBJECT_CLASS (klass);
ClutterBehaviourClass *behave_class = CLUTTER_BEHAVIOUR_CLASS (klass);
GParamSpec *pspec = NULL;
g_type_class_add_private (klass, sizeof (ClutterBehaviourEllipsePrivate));
object_class->set_property = clutter_behaviour_ellipse_set_property;
object_class->get_property = clutter_behaviour_ellipse_get_property;
behave_class->alpha_notify = clutter_behaviour_ellipse_alpha_notify;
behave_class->applied = clutter_behaviour_ellipse_applied;
/**
* ClutterBehaviourEllipse:angle-start:
*
* The initial angle from where the rotation should start.
*
* Since: 0.4
*/
pspec = g_param_spec_double ("angle-start",
P_("Start Angle"),
P_("Initial angle"),
0.0, 360.0,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_ANGLE_START, pspec);
/**
* ClutterBehaviourEllipse:angle-end:
*
* The final angle to where the rotation should end.
*
* Since: 0.4
*/
pspec = g_param_spec_double ("angle-end",
P_("End Angle"),
P_("Final angle"),
0.0, 360.0,
0.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_ANGLE_END, pspec);
/**
* ClutterBehaviourEllipse:angle-tilt-x:
*
* The tilt angle for the rotation around center in X axis
*
* Since: 0.4
*/
pspec = g_param_spec_double ("angle-tilt-x",
P_("Angle x tilt"),
P_("Tilt of the ellipse around x axis"),
0.0, 360.0,
360.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_ANGLE_TILT_X, pspec);
/**
* ClutterBehaviourEllipse:angle-tilt-y:
*
* The tilt angle for the rotation around center in Y axis
*
* Since: 0.4
*/
pspec = g_param_spec_double ("angle-tilt-y",
P_("Angle y tilt"),
P_("Tilt of the ellipse around y axis"),
0.0, 360.0,
360.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_ANGLE_TILT_Y, pspec);
/**
* ClutterBehaviourEllipse:angle-tilt-z:
*
* The tilt angle for the rotation on the Z axis
*
* Since: 0.4
*/
pspec = g_param_spec_double ("angle-tilt-z",
P_("Angle z tilt"),
P_("Tilt of the ellipse around z axis"),
0.0, 360.0,
360.0,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_ANGLE_TILT_Z, pspec);
/**
* ClutterBehaviourEllipse:width:
*
* Width of the ellipse, in pixels
*
* Since: 0.4
*/
pspec = g_param_spec_int ("width",
P_("Width"),
P_("Width of the ellipse"),
0, G_MAXINT,
100,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_WIDTH, pspec);
/**
* ClutterBehaviourEllipse:height:
*
* Height of the ellipse, in pixels
*
* Since: 0.4
*/
pspec = g_param_spec_int ("height",
P_("Height"),
P_("Height of ellipse"),
0, G_MAXINT,
50,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_HEIGHT, pspec);
/**
* ClutterBehaviourEllipse:center:
*
* The center of the ellipse.
*
* Since: 0.4
*/
pspec = g_param_spec_boxed ("center",
P_("Center"),
P_("Center of ellipse"),
CLUTTER_TYPE_KNOT,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_CENTER, pspec);
/**
* ClutterBehaviourEllipse:direction:
*
* The direction of the rotation.
*
* Since: 0.4
*/
pspec = g_param_spec_enum ("direction",
P_("Direction"),
P_("Direction of rotation"),
CLUTTER_TYPE_ROTATE_DIRECTION,
CLUTTER_ROTATE_CW,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class, PROP_DIRECTION, pspec);
}
static void
clutter_behaviour_ellipse_init (ClutterBehaviourEllipse * self)
{
ClutterBehaviourEllipsePrivate *priv;
self->priv = priv = CLUTTER_BEHAVIOUR_ELLIPSE_GET_PRIVATE (self);
priv->direction = CLUTTER_ROTATE_CW;
priv->angle_start = 0;
priv->angle_end = 0;
priv->a = 50;
priv->b = 25;
priv->angle_tilt_x = 360;
priv->angle_tilt_y = 360;
priv->angle_tilt_z = 360;
}
/**
* clutter_behaviour_ellipse_new:
* @alpha: a #ClutterAlpha, or %NULL
* @x: x coordinace of the center
* @y: y coordiance of the center
* @width: width of the ellipse
* @height: height of the ellipse
* @direction: #ClutterRotateDirection of rotation
* @start: angle in degrees at which movement starts, between 0 and 360
* @end: angle in degrees at which movement ends, between 0 and 360
*
* Creates a behaviour that drives actors along an elliptical path with
* given center, width and height; the movement starts at @start
* degrees (with 0 corresponding to 12 o'clock) and ends at @end
* degrees. Angles greated than 360 degrees get clamped to the canonical
* interval <0, 360); if @start is equal to @end, the behaviour will
* rotate by exacly 360 degrees.
*
* Return value: the newly created #ClutterBehaviourEllipse
*
* Since: 0.4
*/
ClutterBehaviour *
clutter_behaviour_ellipse_new (ClutterAlpha *alpha,
gint x,
gint y,
gint width,
gint height,
ClutterRotateDirection direction,
gdouble start,
gdouble end)
{
ClutterKnot center;
g_return_val_if_fail (alpha == NULL || CLUTTER_IS_ALPHA (alpha), NULL);
center.x = x;
center.y = y;
return g_object_new (CLUTTER_TYPE_BEHAVIOUR_ELLIPSE,
"alpha", alpha,
"center", &center,
"width", width,
"height", height,
"direction", direction,
"angle-start", start,
"angle-end", end,
NULL);
}
/**
* clutter_behaviour_ellipse_set_center:
* @self: a #ClutterBehaviourEllipse
* @x: x coordinace of centre
* @y: y coordinace of centre
*
* Sets the center of the elliptical path to the point represented by knot.
*
* Since: 0.4
*/
void
clutter_behaviour_ellipse_set_center (ClutterBehaviourEllipse *self,
gint x,
gint y)
{
ClutterBehaviourEllipsePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self));
priv = self->priv;
if (priv->center.x != x || priv->center.y != y)
{
priv->center.x = x;
priv->center.y = y;
g_object_notify (G_OBJECT (self), "center");
}
}
/**
* clutter_behaviour_ellipse_get_center:
* @self: a #ClutterBehaviourEllipse
* @x: return location for the X coordinate of the center, or %NULL
* @y: return location for the Y coordinate of the center, or %NULL
*
* Gets the center of the elliptical path path.
*
* Since: 0.4
*/
void
clutter_behaviour_ellipse_get_center (ClutterBehaviourEllipse *self,
gint *x,
gint *y)
{
ClutterBehaviourEllipsePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self));
priv = self->priv;
if (x)
*x = priv->center.x;
if (y)
*y = priv->center.y;
}
/**
* clutter_behaviour_ellipse_set_width:
* @self: a #ClutterBehaviourEllipse
* @width: width of the ellipse
*
* Sets the width of the elliptical path.
*
* Since: 0.4
*/
void
clutter_behaviour_ellipse_set_width (ClutterBehaviourEllipse *self,
gint width)
{
ClutterBehaviourEllipsePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self));
priv = self->priv;
if (priv->a != width / 2)
{
priv->a = width / 2;
g_object_notify (G_OBJECT (self), "width");
}
}
/**
* clutter_behaviour_ellipse_get_width:
* @self: a #ClutterBehaviourEllipse
*
* Gets the width of the elliptical path.
*
* Return value: the width of the path
*
* Since: 0.4
*/
gint
clutter_behaviour_ellipse_get_width (ClutterBehaviourEllipse *self)
{
g_return_val_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self), 0);
return self->priv->a * 2;
}
/**
* clutter_behaviour_ellipse_set_height:
* @self: a #ClutterBehaviourEllipse
* @height: height of the ellipse
*
* Sets the height of the elliptical path.
*
* Since: 0.4
*/
void
clutter_behaviour_ellipse_set_height (ClutterBehaviourEllipse *self,
gint height)
{
ClutterBehaviourEllipsePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self));
priv = self->priv;
if (priv->b != height / 2)
{
priv->b = height / 2;
g_object_notify (G_OBJECT (self), "height");
}
}
/**
* clutter_behaviour_ellipse_get_height:
* @self: a #ClutterBehaviourEllipse
*
* Gets the height of the elliptical path.
*
* Return value: the height of the path
*
* Since: 0.4
*/
gint
clutter_behaviour_ellipse_get_height (ClutterBehaviourEllipse *self)
{
g_return_val_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self), 0);
return self->priv->b * 2;
}
/**
* clutter_behaviour_ellipse_set_angle_start:
* @self: a #ClutterBehaviourEllipse
* @angle_start: angle at which movement starts in degrees, between 0 and 360.
*
* Sets the angle at which movement starts; angles >= 360 degress get clamped
* to the canonical interval <0, 360).
*
* Since: 0.6
*/
void
clutter_behaviour_ellipse_set_angle_start (ClutterBehaviourEllipse *self,
gdouble angle_start)
{
ClutterBehaviourEllipsePrivate *priv;
gdouble new_angle;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self));
new_angle = clamp_angle (angle_start);
priv = self->priv;
if (priv->angle_start != new_angle)
{
priv->angle_start = new_angle;
g_object_notify (G_OBJECT (self), "angle-start");
}
}
/**
* clutter_behaviour_ellipse_get_angle_start:
* @self: a #ClutterBehaviourEllipse
*
* Gets the angle at which movements starts.
*
* Return value: angle in degrees
*
* Since: 0.6
*/
gdouble
clutter_behaviour_ellipse_get_angle_start (ClutterBehaviourEllipse *self)
{
g_return_val_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self), 0.0);
return self->priv->angle_start;
}
/**
* clutter_behaviour_ellipse_set_angle_end:
* @self: a #ClutterBehaviourEllipse
* @angle_end: angle at which movement ends in degrees, between 0 and 360.
*
* Sets the angle at which movement ends; angles >= 360 degress get clamped
* to the canonical interval <0, 360).
*
* Since: 0.4
*/
void
clutter_behaviour_ellipse_set_angle_end (ClutterBehaviourEllipse *self,
gdouble angle_end)
{
ClutterBehaviourEllipsePrivate *priv;
gdouble new_angle;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self));
new_angle = clamp_angle (angle_end);
priv = self->priv;
if (priv->angle_end != new_angle)
{
priv->angle_end = new_angle;
g_object_notify (G_OBJECT (self), "angle-end");
}
}
/**
* clutter_behaviour_ellipse_get_angle_end:
* @self: a #ClutterBehaviourEllipse
*
* Gets the at which movements ends.
*
* Return value: angle in degrees
*
* Since: 0.4
*/
gdouble
clutter_behaviour_ellipse_get_angle_end (ClutterBehaviourEllipse *self)
{
g_return_val_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self), 0.0);
return self->priv->angle_end;
}
/**
* clutter_behaviour_ellipse_set_angle_tilt:
* @self: a #ClutterBehaviourEllipse
* @axis: a #ClutterRotateAxis
* @angle_tilt: tilt of the elipse around the center in the given axis in
* degrees.
*
* Sets the angle at which the ellipse should be tilted around it's center.
*
* Since: 0.4
*/
void
clutter_behaviour_ellipse_set_angle_tilt (ClutterBehaviourEllipse *self,
ClutterRotateAxis axis,
gdouble angle_tilt)
{
ClutterBehaviourEllipsePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self));
priv = self->priv;
switch (axis)
{
case CLUTTER_X_AXIS:
if (priv->angle_tilt_x != angle_tilt)
{
priv->angle_tilt_x = angle_tilt;
g_object_notify (G_OBJECT (self), "angle-tilt-x");
}
break;
case CLUTTER_Y_AXIS:
if (priv->angle_tilt_y != angle_tilt)
{
priv->angle_tilt_y = angle_tilt;
g_object_notify (G_OBJECT (self), "angle-tilt-y");
}
break;
case CLUTTER_Z_AXIS:
if (priv->angle_tilt_z != angle_tilt)
{
priv->angle_tilt_z = angle_tilt;
g_object_notify (G_OBJECT (self), "angle-tilt-z");
}
break;
}
}
/**
* clutter_behaviour_ellipse_get_angle_tilt:
* @self: a #ClutterBehaviourEllipse
* @axis: a #ClutterRotateAxis
*
* Gets the tilt of the ellipse around the center in the given axis.
*
* Return value: angle in degrees.
*
* Since: 0.4
*/
gdouble
clutter_behaviour_ellipse_get_angle_tilt (ClutterBehaviourEllipse *self,
ClutterRotateAxis axis)
{
g_return_val_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self), 0.0);
switch (axis)
{
case CLUTTER_X_AXIS:
return self->priv->angle_tilt_x;
case CLUTTER_Y_AXIS:
return self->priv->angle_tilt_y;
case CLUTTER_Z_AXIS:
return self->priv->angle_tilt_z;
}
return 0.0;
}
/**
* clutter_behaviour_ellipse_set_tilt:
* @self: a #ClutterBehaviourEllipse
* @angle_tilt_x: tilt of the elipse around the center in X axis in degrees.
* @angle_tilt_y: tilt of the elipse around the center in Y axis in degrees.
* @angle_tilt_z: tilt of the elipse around the center in Z axis in degrees.
*
* Sets the angles at which the ellipse should be tilted around it's center.
*
* Since: 0.4
*/
void
clutter_behaviour_ellipse_set_tilt (ClutterBehaviourEllipse *self,
gdouble angle_tilt_x,
gdouble angle_tilt_y,
gdouble angle_tilt_z)
{
ClutterBehaviourEllipsePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self));
priv = self->priv;
g_object_freeze_notify (G_OBJECT (self));
if (priv->angle_tilt_x != angle_tilt_x)
{
priv->angle_tilt_x = angle_tilt_x;
g_object_notify (G_OBJECT (self), "angle-tilt-x");
}
if (priv->angle_tilt_y != angle_tilt_y)
{
priv->angle_tilt_y = angle_tilt_y;
g_object_notify (G_OBJECT (self), "angle-tilt-y");
}
if (priv->angle_tilt_z != angle_tilt_z)
{
priv->angle_tilt_z = angle_tilt_z;
g_object_notify (G_OBJECT (self), "angle-tilt-z");
}
g_object_thaw_notify (G_OBJECT (self));
}
/**
* clutter_behaviour_ellipse_get_tilt:
* @self: a #ClutterBehaviourEllipse
* @angle_tilt_x: return location for tilt angle on the X axis, or %NULL.
* @angle_tilt_y: return location for tilt angle on the Y axis, or %NULL.
* @angle_tilt_z: return location for tilt angle on the Z axis, or %NULL.
*
* Gets the tilt of the ellipse around the center in Y axis.
*
* Since: 0.4
*/
void
clutter_behaviour_ellipse_get_tilt (ClutterBehaviourEllipse *self,
gdouble *angle_tilt_x,
gdouble *angle_tilt_y,
gdouble *angle_tilt_z)
{
ClutterBehaviourEllipsePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self));
priv = self->priv;
if (angle_tilt_x)
*angle_tilt_x = priv->angle_tilt_x;
if (angle_tilt_y)
*angle_tilt_y = priv->angle_tilt_y;
if (angle_tilt_z)
*angle_tilt_z = priv->angle_tilt_z;
}
/**
* clutter_behaviour_ellipse_get_direction:
* @self: a #ClutterBehaviourEllipse
*
* Retrieves the #ClutterRotateDirection used by the ellipse behaviour.
*
* Return value: the rotation direction
*
* Since: 0.4
*/
ClutterRotateDirection
clutter_behaviour_ellipse_get_direction (ClutterBehaviourEllipse *self)
{
g_return_val_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self),
CLUTTER_ROTATE_CW);
return self->priv->direction;
}
/**
* clutter_behaviour_ellipse_set_direction:
* @self: a #ClutterBehaviourEllipse
* @direction: the rotation direction
*
* Sets the rotation direction used by the ellipse behaviour.
*
* Since: 0.4
*/
void
clutter_behaviour_ellipse_set_direction (ClutterBehaviourEllipse *self,
ClutterRotateDirection direction)
{
ClutterBehaviourEllipsePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ELLIPSE (self));
priv = self->priv;
if (priv->direction != direction)
{
priv->direction = direction;
g_object_notify (G_OBJECT (self), "direction");
}
}
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