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mutter-performance-source/clutter/clutter-behaviour-rotate.c
Emmanuele Bassi d0514f4de2 Fix clutter_behaviour_rotate_get_center() 
Apply a patch from Neil Roberts (bug 468) that makes the get_center() method
of ClutterBehaviourRotate return the correct tuple of coordinates.

Also, fix some coding style issues and make sure to freeze and thaw the
GObject notification queue when emitting the notify signal on multiple
properties in one method.
2007-08-18 12:39:36 +00:00

801 lines
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/*
* Clutter.
*
* An OpenGL based 'interactive canvas' library.
*
* Authored By Matthew Allum <mallum@openedhand.com>
*
* Copyright (C) 2007 OpenedHand
*
* 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, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
/**
* SECTION:clutter-behaviour-rotate
* @short_description: A behaviour class to rotate actors
*
* A #ClutterBehaviourRotate rotate actors between a starting and ending
* angle on a given axis.
*
* The #ClutterBehaviourRotate is available since version 0.4.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "clutter-actor.h"
#include "clutter-behaviour.h"
#include "clutter-main.h"
#include "clutter-fixed.h"
#include "clutter-behaviour-rotate.h"
#include "clutter-enum-types.h"
#include "clutter-private.h"
#include "clutter-debug.h"
#include <math.h>
G_DEFINE_TYPE (ClutterBehaviourRotate,
clutter_behaviour_rotate,
CLUTTER_TYPE_BEHAVIOUR);
struct _ClutterBehaviourRotatePrivate
{
ClutterFixed angle_begin;
ClutterFixed angle_end;
ClutterRotateAxis axis;
ClutterRotateDirection direction;
gint center_x;
gint center_y;
gint center_z;
};
#define CLUTTER_BEHAVIOUR_ROTATE_GET_PRIVATE(obj) \
(G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
CLUTTER_TYPE_BEHAVIOUR_ROTATE, \
ClutterBehaviourRotatePrivate))
enum
{
PROP_0,
PROP_ANGLE_BEGIN,
PROP_ANGLE_END,
PROP_AXIS,
PROP_DIRECTION,
PROP_CENTER_X,
PROP_CENTER_Y,
PROP_CENTER_Z
};
static void
alpha_notify_foreach (ClutterBehaviour *behaviour,
ClutterActor *actor,
gpointer data)
{
ClutterFixed angle;
ClutterBehaviourRotate *rotate_behaviour;
ClutterBehaviourRotatePrivate *priv;
rotate_behaviour = CLUTTER_BEHAVIOUR_ROTATE (behaviour);
priv = rotate_behaviour->priv;
angle = GPOINTER_TO_UINT(data);
switch (priv->axis)
{
case CLUTTER_X_AXIS:
clutter_actor_rotate_xx (actor,
angle,
priv->center_y, priv->center_z);
break;
case CLUTTER_Y_AXIS:
clutter_actor_rotate_yx (actor,
angle,
priv->center_x, priv->center_z);
break;
case CLUTTER_Z_AXIS:
clutter_actor_rotate_zx (actor,
angle,
priv->center_x, priv->center_y);
break;
}
}
static void
clutter_behaviour_rotate_alpha_notify (ClutterBehaviour *behaviour,
guint32 alpha_value)
{
ClutterFixed factor, angle, diff;
ClutterBehaviourRotate *rotate_behaviour;
ClutterBehaviourRotatePrivate *priv;
rotate_behaviour = CLUTTER_BEHAVIOUR_ROTATE (behaviour);
priv = rotate_behaviour->priv;
factor = CLUTTER_INT_TO_FIXED (alpha_value) / CLUTTER_ALPHA_MAX_ALPHA;
angle = 0;
switch (priv->direction)
{
case CLUTTER_ROTATE_CW:
if (priv->angle_end >= priv->angle_begin)
{
angle = CLUTTER_FIXED_MUL (factor,
(priv->angle_end - priv->angle_begin));
angle += priv->angle_begin;
}
else
{
/* Work out the angular length of the arch represented by the
* end angle in CCW direction
*/
if (priv->angle_end > CLUTTER_INT_TO_FIXED (360))
{
ClutterFixed rounds, a1, a2;
rounds = priv->angle_begin / 360;
a1 = rounds * 360;
a2 = CLUTTER_INT_TO_FIXED (360) - (priv->angle_begin - a1);
diff = a1 + a2 + priv->angle_end;
}
else
{
diff = CLUTTER_INT_TO_FIXED (360)
- priv->angle_begin
+ priv->angle_end;
}
angle = CLUTTER_FIXED_MUL (diff, factor);
angle += priv->angle_begin;
}
break;
case CLUTTER_ROTATE_CCW:
if (priv->angle_end <= priv->angle_begin)
{
angle = CLUTTER_FIXED_MUL (factor,
(priv->angle_begin - priv->angle_end));
angle += priv->angle_end;
}
else
{
/* Work out the angular length of the arch represented by the
* end angle in CCW direction
*/
if (priv->angle_end > CLUTTER_INT_TO_FIXED (360))
{
ClutterFixed rounds, a1, a2;
rounds = priv->angle_begin / 360;
a1 = rounds * 360;
a2 = CLUTTER_INT_TO_FIXED (360) - (priv->angle_end - a1);
diff = a1 + a2 + priv->angle_begin;
}
else
{
diff = CLUTTER_INT_TO_FIXED (360)
- priv->angle_end
+ priv->angle_begin;
}
angle = priv->angle_begin - CLUTTER_FIXED_MUL (diff, factor);
}
break;
}
clutter_behaviour_actors_foreach (behaviour,
alpha_notify_foreach,
GUINT_TO_POINTER ((guint)angle));
}
static void
clutter_behaviour_rotate_set_property (GObject *gobject,
guint prop_id,
const GValue *value,
GParamSpec *pspec)
{
ClutterBehaviourRotate *rotate;
ClutterBehaviourRotatePrivate *priv;
rotate = CLUTTER_BEHAVIOUR_ROTATE (gobject);
priv = rotate->priv;
switch (prop_id)
{
case PROP_ANGLE_BEGIN:
priv->angle_begin = CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
break;
case PROP_ANGLE_END:
priv->angle_end = CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
break;
case PROP_AXIS:
priv->axis = g_value_get_enum (value);
break;
case PROP_DIRECTION:
priv->direction = g_value_get_enum (value);
break;
case PROP_CENTER_X:
clutter_behaviour_rotate_set_center (rotate,
g_value_get_int (value),
priv->center_y,
priv->center_z);
break;
case PROP_CENTER_Y:
clutter_behaviour_rotate_set_center (rotate,
priv->center_x,
g_value_get_int (value),
priv->center_z);
break;
case PROP_CENTER_Z:
clutter_behaviour_rotate_set_center (rotate,
priv->center_x,
priv->center_y,
g_value_get_int (value));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_behaviour_rotate_get_property (GObject *gobject,
guint prop_id,
GValue *value,
GParamSpec *pspec)
{
ClutterBehaviourRotatePrivate *priv;
priv = CLUTTER_BEHAVIOUR_ROTATE (gobject)->priv;
switch (prop_id)
{
case PROP_ANGLE_BEGIN:
g_value_set_double (value, CLUTTER_FIXED_TO_DOUBLE (priv->angle_begin));
break;
case PROP_ANGLE_END:
g_value_set_double (value, CLUTTER_FIXED_TO_DOUBLE (priv->angle_end));
break;
case PROP_AXIS:
g_value_set_enum (value, priv->axis);
break;
case PROP_DIRECTION:
g_value_set_enum (value, priv->direction);
break;
case PROP_CENTER_X:
g_value_set_int (value, priv->center_x);
break;
case PROP_CENTER_Y:
g_value_set_int (value, priv->center_y);
break;
case PROP_CENTER_Z:
g_value_set_int (value, priv->center_z);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
break;
}
}
static void
clutter_behaviour_rotate_class_init (ClutterBehaviourRotateClass *klass)
{
GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
ClutterBehaviourClass *behaviour_class = CLUTTER_BEHAVIOUR_CLASS (klass);
gobject_class->set_property = clutter_behaviour_rotate_set_property;
gobject_class->get_property = clutter_behaviour_rotate_get_property;
behaviour_class->alpha_notify = clutter_behaviour_rotate_alpha_notify;
/**
* ClutterBehaviourRotate:angle-begin:
*
* The initial angle from whence the rotation should begin.
*
* Since: 0.4
*/
g_object_class_install_property (gobject_class,
PROP_ANGLE_BEGIN,
g_param_spec_double ("angle-begin",
"Angle Begin",
"Initial angle",
0.0,
CLUTTER_ANGLE_MAX_DEG,
0.0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterBehaviourRotate:angle-end:
*
* The final angle to where the rotation should end.
*
* Since: 0.4
*/
g_object_class_install_property (gobject_class,
PROP_ANGLE_END,
g_param_spec_double ("angle-end",
"Angle End",
"Final angle",
0.0,
CLUTTER_ANGLE_MAX_DEG,
360.0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterBehaviourRotate:axis:
*
* The axis of rotation.
*
* Since: 0.4
*/
g_object_class_install_property (gobject_class,
PROP_AXIS,
g_param_spec_enum ("axis",
"Axis",
"Axis of rotation",
CLUTTER_TYPE_ROTATE_AXIS,
CLUTTER_Z_AXIS,
CLUTTER_PARAM_READWRITE));
/**
* ClutterBehaviourRotate:direction:
*
* The direction of the rotation.
*
* Since: 0.4
*/
g_object_class_install_property (gobject_class,
PROP_DIRECTION,
g_param_spec_enum ("direction",
"Direction",
"Direction of rotation",
CLUTTER_TYPE_ROTATE_DIRECTION,
CLUTTER_ROTATE_CW,
CLUTTER_PARAM_READWRITE));
/**
* ClutterBehaviourRotate:center-x:
*
* The x center of rotation.
*
* Since: 0.4
*/
g_object_class_install_property (gobject_class,
PROP_CENTER_X,
g_param_spec_int ("center-x",
"Center-X",
"X center of rotation",
-G_MAXINT, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterBehaviourRotate:center-y:
*
* The y center of rotation.
*
* Since: 0.4
*/
g_object_class_install_property (gobject_class,
PROP_CENTER_Y,
g_param_spec_int ("center-y",
"Center-Y",
"Y center of rotation",
-G_MAXINT, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE));
/**
* ClutterBehaviourRotate:center-z:
*
* The z center of rotation.
*
* Since: 0.4
*/
g_object_class_install_property (gobject_class,
PROP_CENTER_Z,
g_param_spec_int ("center-z",
"Center-Z",
"Z center of rotation",
-G_MAXINT, G_MAXINT,
0,
CLUTTER_PARAM_READWRITE));
g_type_class_add_private (klass, sizeof (ClutterBehaviourRotatePrivate));
}
static void
clutter_behaviour_rotate_init (ClutterBehaviourRotate *rotate)
{
ClutterBehaviourRotatePrivate *priv;
rotate->priv = priv = CLUTTER_BEHAVIOUR_ROTATE_GET_PRIVATE (rotate);
priv->angle_begin = CLUTTER_FLOAT_TO_FIXED (0.0);
priv->angle_end = CLUTTER_FLOAT_TO_FIXED (360.0);
priv->axis = CLUTTER_Z_AXIS;
priv->direction = CLUTTER_ROTATE_CW;
priv->center_x = priv->center_y = priv->center_z = 0;
}
/**
* clutter_behaviour_rotate_new:
* @alpha: a #ClutterAlpha, or %NULL
* @axis: the rotation axis
* @direction: the rotation direction
* @angle_begin: the starting angle
* @angle_end: the final angle
*
* Creates a new #ClutterBehaviourRotate. This behaviour will rotate actors
* bound to it on @axis, following @direction, between @angle_begin and
* @angle_end.
*
* Return value: the newly created #ClutterBehaviourRotate.
*
* Since: 0.4
*/
ClutterBehaviour *
clutter_behaviour_rotate_new (ClutterAlpha *alpha,
ClutterRotateAxis axis,
ClutterRotateDirection direction,
gdouble angle_begin,
gdouble angle_end)
{
g_return_val_if_fail (alpha == NULL || CLUTTER_IS_ALPHA (alpha), NULL);
return g_object_new (CLUTTER_TYPE_BEHAVIOUR_ROTATE,
"alpha", alpha,
"axis", axis,
"direction", direction,
"angle-begin", angle_begin,
"angle-end", angle_end,
NULL);
}
/**
* clutter_behaviour_rotate_newx:
* @alpha: a #ClutterAlpha or %NULL
* @axis: the rotation axis
* @direction: the rotation direction
* @angle_begin: the starting angle, in fixed point notation
* @angle_end: the final angle, in fixed point notation
*
* Creates a new #ClutterBehaviourRotate. This is the fixed point version
* of clutter_behaviour_rotate_new().
*
* Return value: the newly created #ClutterBehaviourRotate.
*
* Since: 0.4
*/
ClutterBehaviour *
clutter_behaviour_rotate_newx (ClutterAlpha *alpha,
ClutterRotateAxis axis,
ClutterRotateDirection direction,
ClutterFixed angle_begin,
ClutterFixed angle_end)
{
ClutterBehaviour *retval;
ClutterBehaviourRotatePrivate *priv;
g_return_val_if_fail (alpha == NULL || CLUTTER_IS_ALPHA (alpha), NULL);
retval = g_object_new (CLUTTER_TYPE_BEHAVIOUR_ROTATE,
"alpha", alpha,
"axis", axis,
"direction", direction,
NULL);
/* we don't want to convert the angles from fixed to boolean
* and then back again to fixed.
*/
priv = CLUTTER_BEHAVIOUR_ROTATE_GET_PRIVATE (retval);
priv->angle_begin = angle_begin;
priv->angle_end = angle_end;
return retval;
}
/**
* clutter_behaviour_rotate_get_axis:
* @rotate: a #ClutterBehaviourRotate
*
* Retrieves the #ClutterRotateAxis used by the rotate behaviour.
*
* Return value: the rotation axis
*
* Since: 0.4
*/
ClutterRotateAxis
clutter_behaviour_rotate_get_axis (ClutterBehaviourRotate *rotate)
{
g_return_val_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate), CLUTTER_Z_AXIS);
return rotate->priv->axis;
}
/**
* clutter_behaviour_rotate_set_axis:
* @rotate: a #ClutterBehaviourRotate
* @axis: a #ClutterRotateAxis
*
* Sets the axis used by the rotate behaviour.
*
* Since: 0.4
*/
void
clutter_behaviour_rotate_set_axis (ClutterBehaviourRotate *rotate,
ClutterRotateAxis axis)
{
ClutterBehaviourRotatePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
priv = rotate->priv;
if (priv->axis != axis)
{
priv->axis = axis;
g_object_notify (G_OBJECT (rotate), "axis");
}
}
/**
* clutter_behaviour_rotate_get_direction:
* @rotate: a #ClutterBehaviourRotate
*
* Retrieves the #ClutterRotateDirection used by the rotate behaviour.
*
* Return value: the rotation direction
*
* Since: 0.4
*/
ClutterRotateDirection
clutter_behaviour_rotate_get_direction (ClutterBehaviourRotate *rotate)
{
g_return_val_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate),
CLUTTER_ROTATE_CW);
return rotate->priv->direction;
}
/**
* clutter_behaviour_rotate_set_direction:
* @rotate: a #ClutterBehaviourRotate
* @direction: the rotation direction
*
* Sets the rotation direction used by the rotate behaviour.
*
* Since: 0.4
*/
void
clutter_behaviour_rotate_set_direction (ClutterBehaviourRotate *rotate,
ClutterRotateDirection direction)
{
ClutterBehaviourRotatePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
priv = rotate->priv;
if (priv->direction != direction)
{
priv->direction = direction;
g_object_notify (G_OBJECT (rotate), "direction");
}
}
/**
* clutter_behaviour_rotate_get_bounds:
* @rotate: a #ClutterBehaviourRotate
* @angle_begin: return value for the initial angle
* @angle_end: return value for the final angle
*
* Retrieves the rotation boundaries of the rotate behaviour.
*
* Since: 0.4
*/
void
clutter_behaviour_rotate_get_bounds (ClutterBehaviourRotate *rotate,
gdouble *angle_begin,
gdouble *angle_end)
{
ClutterBehaviourRotatePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
priv = rotate->priv;
if (angle_begin)
*angle_begin = CLUTTER_FIXED_TO_DOUBLE (priv->angle_begin);
if (angle_end)
*angle_end = CLUTTER_FIXED_TO_DOUBLE (priv->angle_end);
}
/**
* clutter_behaviour_rotate_set_bounds:
* @rotate: a #ClutterBehaviourRotate
* @angle_begin: initial angle
* @angle_end: final angle
*
* Sets the initial and final angles of a rotation behaviour.
*
* Since: 0.4
*/
void
clutter_behaviour_rotate_set_bounds (ClutterBehaviourRotate *rotate,
gdouble angle_begin,
gdouble angle_end)
{
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
clutter_behaviour_rotate_set_boundsx (rotate,
CLUTTER_FLOAT_TO_FIXED (angle_begin),
CLUTTER_FLOAT_TO_FIXED (angle_end));
}
/**
* clutter_behaviour_rotate_get_boundsx:
* @rotate: a #ClutterBehaviourRotate
* @angle_begin: return value for the initial angle
* @angle_end: return value for the final angle
*
* Retrieves the rotation boundaries of the rotate behaviour. This is
* the fixed point notation version of clutter_behaviour_rotate_get_bounds().
*
* Since: 0.4
*/
void
clutter_behaviour_rotate_get_boundsx (ClutterBehaviourRotate *rotate,
ClutterFixed *angle_begin,
ClutterFixed *angle_end)
{
ClutterBehaviourRotatePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
priv = rotate->priv;
if (angle_begin);
*angle_begin = priv->angle_begin;
if (angle_end)
*angle_end = priv->angle_end;
}
/**
* clutter_behaviour_rotate_set_boundsx:
* @rotate: a #ClutterBehaviourRotate
* @angle_begin: initial angle, in fixed point notation
* @angle_end: final angle, in fixed point notation
*
* Fixed point version of clutter_behaviour_rotate_set_bounds().
*
* Since: 0.4
*/
void
clutter_behaviour_rotate_set_boundsx (ClutterBehaviourRotate *rotate,
ClutterFixed angle_begin,
ClutterFixed angle_end)
{
ClutterBehaviourRotatePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
priv = rotate->priv;
g_object_ref (rotate);
g_object_freeze_notify (G_OBJECT (rotate));
if (priv->angle_begin != angle_begin)
{
priv->angle_begin = angle_begin;
g_object_notify (G_OBJECT (rotate), "angle-begin");
}
if (priv->angle_end != angle_end)
{
priv->angle_end = angle_end;
g_object_notify (G_OBJECT (rotate), "angle-end");
}
g_object_thaw_notify (G_OBJECT (rotate));
g_object_unref (rotate);
}
/**
* clutter_behaviour_rotate_set_center:
* @rotate: a #ClutterBehaviourRotate
* @x: X axis center of rotation
* @y: Y axis center of rotation
* @z: Z axis center of rotation
*
* Sets the center of rotation. The coordinates are relative to the plane
* normal to the rotation axis set with clutter_behaviour_rotate_set_axis().
*
* Since: 0.4
*/
void
clutter_behaviour_rotate_set_center (ClutterBehaviourRotate *rotate,
gint x,
gint y,
gint z)
{
ClutterBehaviourRotatePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
priv = rotate->priv;
g_object_ref (rotate);
g_object_freeze_notify (G_OBJECT (rotate));
if (priv->center_x != x)
{
priv->center_x = x;
g_object_notify (G_OBJECT (rotate), "center-x");
}
if (priv->center_y != y)
{
priv->center_y = y;
g_object_notify (G_OBJECT (rotate), "center-y");
}
if (priv->center_z != z)
{
priv->center_z = z;
g_object_notify (G_OBJECT (rotate), "center-z");
}
g_object_thaw_notify (G_OBJECT (rotate));
g_object_unref (rotate);
}
/**
* clutter_behaviour_rotate_get_center:
* @rotate: a #ClutterBehaviourRotate
* @x: return location for the X center of rotation
* @y: return location for the Y center of rotation
* @z: return location for the Z center of rotation
*
* Retrieves the center of rotation set using
* clutter_behaviour_rotate_set_center().
*
* Since: 0.4
*/
void
clutter_behaviour_rotate_get_center (ClutterBehaviourRotate *rotate,
gint *x,
gint *y,
gint *z)
{
ClutterBehaviourRotatePrivate *priv;
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
priv = rotate->priv;
if (x)
*x = priv->center_x;
if (y)
*y = priv->center_y;
if (z)
*z = priv->center_z;
}
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