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d5e5d35316
Currently only the Z axis rotation center can be set using a gravity
but the other rotations also store their center as an AnchorCoord for
consistency. Specifying the center as a gravity makes less sense for
the other axes because the actors have no size along the Z axis.
The rotation angles are now stored as gdoubles and the fixed point *x
entry points have been removed.
The Z rotation can now be set with a gravity center using the
following new function:
void clutter_actor_set_z_rotation_from_gravity (ClutterActor *self,
gdouble angle,
ClutterGravity gravity);
753 lines
22 KiB
C
753 lines
22 KiB
C
/*
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* Clutter.
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*
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* An OpenGL based 'interactive canvas' library.
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*
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* Authored By Matthew Allum <mallum@openedhand.com>
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*
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* Copyright (C) 2007 OpenedHand
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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/**
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* SECTION:clutter-behaviour-rotate
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* @short_description: A behaviour controlling rotation
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*
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* A #ClutterBehaviourRotate rotate actors between a starting and ending
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* angle on a given axis.
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*
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* The #ClutterBehaviourRotate is available since version 0.4.
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "clutter-actor.h"
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#include "clutter-behaviour.h"
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#include "clutter-main.h"
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#include "clutter-fixed.h"
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#include "clutter-behaviour-rotate.h"
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#include "clutter-enum-types.h"
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#include "clutter-private.h"
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#include "clutter-debug.h"
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#include <math.h>
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G_DEFINE_TYPE (ClutterBehaviourRotate,
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clutter_behaviour_rotate,
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CLUTTER_TYPE_BEHAVIOUR);
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struct _ClutterBehaviourRotatePrivate
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{
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ClutterFixed angle_start;
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ClutterFixed angle_end;
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ClutterRotateAxis axis;
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ClutterRotateDirection direction;
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gint center_x;
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gint center_y;
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gint center_z;
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};
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#define CLUTTER_BEHAVIOUR_ROTATE_GET_PRIVATE(obj) \
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(G_TYPE_INSTANCE_GET_PRIVATE ((obj), \
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CLUTTER_TYPE_BEHAVIOUR_ROTATE, \
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ClutterBehaviourRotatePrivate))
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enum
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{
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PROP_0,
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PROP_ANGLE_START,
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PROP_ANGLE_END,
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PROP_AXIS,
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PROP_DIRECTION,
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PROP_CENTER_X,
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PROP_CENTER_Y,
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PROP_CENTER_Z
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};
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static void
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alpha_notify_foreach (ClutterBehaviour *behaviour,
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ClutterActor *actor,
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gpointer data)
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{
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ClutterFixed angle = GPOINTER_TO_UINT (data);
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ClutterBehaviourRotate *rotate_behaviour;
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ClutterBehaviourRotatePrivate *priv;
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rotate_behaviour = CLUTTER_BEHAVIOUR_ROTATE (behaviour);
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priv = rotate_behaviour->priv;
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clutter_actor_set_rotation (actor, priv->axis,
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CLUTTER_FIXED_TO_DOUBLE (angle),
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priv->center_x,
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priv->center_y,
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priv->center_z);
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}
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static inline
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ClutterFixed clamp_angle (ClutterFixed a)
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{
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ClutterFixed a1, a2;
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gint rounds;
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rounds = a / 360.0;
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a1 = rounds * 360.0;
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a2 = a - a1;
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return a2;
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}
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static void
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clutter_behaviour_rotate_alpha_notify (ClutterBehaviour *behaviour,
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gdouble alpha_value)
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{
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ClutterFixed factor, angle, start, end;
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ClutterBehaviourRotate *rotate_behaviour;
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ClutterBehaviourRotatePrivate *priv;
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rotate_behaviour = CLUTTER_BEHAVIOUR_ROTATE (behaviour);
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priv = rotate_behaviour->priv;
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factor = CLUTTER_FLOAT_TO_FIXED (alpha_value);
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angle = 0;
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start = priv->angle_start;
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end = priv->angle_end;
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if (priv->direction == CLUTTER_ROTATE_CW && start >= end)
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{
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end += 360.0;
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}
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else if (priv->direction == CLUTTER_ROTATE_CCW && start <= end)
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{
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end -= 360.0;
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}
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angle = CLUTTER_FIXED_MUL ((end - start), alpha_value)
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+ start;
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clutter_behaviour_actors_foreach (behaviour,
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alpha_notify_foreach,
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GUINT_TO_POINTER ((guint)angle));
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}
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static void
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clutter_behaviour_rotate_set_property (GObject *gobject,
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guint prop_id,
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const GValue *value,
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GParamSpec *pspec)
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{
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ClutterBehaviourRotate *rotate;
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ClutterBehaviourRotatePrivate *priv;
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rotate = CLUTTER_BEHAVIOUR_ROTATE (gobject);
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priv = rotate->priv;
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switch (prop_id)
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{
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case PROP_ANGLE_START:
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priv->angle_start = CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
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break;
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case PROP_ANGLE_END:
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priv->angle_end = CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
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break;
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case PROP_AXIS:
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priv->axis = g_value_get_enum (value);
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break;
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case PROP_DIRECTION:
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priv->direction = g_value_get_enum (value);
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break;
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case PROP_CENTER_X:
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clutter_behaviour_rotate_set_center (rotate,
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g_value_get_int (value),
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priv->center_y,
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priv->center_z);
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break;
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case PROP_CENTER_Y:
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clutter_behaviour_rotate_set_center (rotate,
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priv->center_x,
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g_value_get_int (value),
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priv->center_z);
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break;
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case PROP_CENTER_Z:
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clutter_behaviour_rotate_set_center (rotate,
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priv->center_x,
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priv->center_y,
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g_value_get_int (value));
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
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break;
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}
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}
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static void
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clutter_behaviour_rotate_get_property (GObject *gobject,
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guint prop_id,
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GValue *value,
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GParamSpec *pspec)
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{
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ClutterBehaviourRotatePrivate *priv;
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priv = CLUTTER_BEHAVIOUR_ROTATE (gobject)->priv;
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switch (prop_id)
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{
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case PROP_ANGLE_START:
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g_value_set_double (value, CLUTTER_FIXED_TO_DOUBLE (priv->angle_start));
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break;
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case PROP_ANGLE_END:
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g_value_set_double (value, CLUTTER_FIXED_TO_DOUBLE (priv->angle_end));
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break;
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case PROP_AXIS:
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g_value_set_enum (value, priv->axis);
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break;
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case PROP_DIRECTION:
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g_value_set_enum (value, priv->direction);
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break;
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case PROP_CENTER_X:
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g_value_set_int (value, priv->center_x);
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break;
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case PROP_CENTER_Y:
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g_value_set_int (value, priv->center_y);
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break;
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case PROP_CENTER_Z:
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g_value_set_int (value, priv->center_z);
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break;
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default:
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G_OBJECT_WARN_INVALID_PROPERTY_ID (gobject, prop_id, pspec);
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break;
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}
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}
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static void
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clutter_behaviour_rotate_class_init (ClutterBehaviourRotateClass *klass)
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS (klass);
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ClutterBehaviourClass *behaviour_class = CLUTTER_BEHAVIOUR_CLASS (klass);
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gobject_class->set_property = clutter_behaviour_rotate_set_property;
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gobject_class->get_property = clutter_behaviour_rotate_get_property;
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behaviour_class->alpha_notify = clutter_behaviour_rotate_alpha_notify;
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/**
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* ClutterBehaviourRotate:angle-start:
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*
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* The initial angle from whence the rotation should start.
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*
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* Since: 0.4
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*/
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g_object_class_install_property (gobject_class,
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PROP_ANGLE_START,
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g_param_spec_double ("angle-start",
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"Angle Begin",
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"Initial angle",
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0.0,
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360.0,
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0.0,
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CLUTTER_PARAM_READWRITE));
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/**
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* ClutterBehaviourRotate:angle-end:
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*
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* The final angle to where the rotation should end.
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*
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* Since: 0.4
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*/
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g_object_class_install_property (gobject_class,
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PROP_ANGLE_END,
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g_param_spec_double ("angle-end",
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"Angle End",
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"Final angle",
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0.0,
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360.0,
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0.0,
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CLUTTER_PARAM_READWRITE));
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/**
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* ClutterBehaviourRotate:axis:
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*
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* The axis of rotation.
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*
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* Since: 0.4
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*/
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g_object_class_install_property (gobject_class,
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PROP_AXIS,
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g_param_spec_enum ("axis",
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"Axis",
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"Axis of rotation",
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CLUTTER_TYPE_ROTATE_AXIS,
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CLUTTER_Z_AXIS,
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CLUTTER_PARAM_READWRITE));
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/**
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* ClutterBehaviourRotate:direction:
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*
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* The direction of the rotation.
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*
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* Since: 0.4
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*/
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g_object_class_install_property (gobject_class,
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PROP_DIRECTION,
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g_param_spec_enum ("direction",
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"Direction",
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"Direction of rotation",
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CLUTTER_TYPE_ROTATE_DIRECTION,
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CLUTTER_ROTATE_CW,
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CLUTTER_PARAM_READWRITE));
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/**
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* ClutterBehaviourRotate:center-x:
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*
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* The x center of rotation.
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*
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* Since: 0.4
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*/
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g_object_class_install_property (gobject_class,
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PROP_CENTER_X,
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g_param_spec_int ("center-x",
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"Center-X",
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"X center of rotation",
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-G_MAXINT, G_MAXINT,
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0,
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CLUTTER_PARAM_READWRITE));
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/**
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* ClutterBehaviourRotate:center-y:
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*
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* The y center of rotation.
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*
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* Since: 0.4
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*/
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g_object_class_install_property (gobject_class,
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PROP_CENTER_Y,
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g_param_spec_int ("center-y",
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"Center-Y",
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"Y center of rotation",
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-G_MAXINT, G_MAXINT,
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0,
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CLUTTER_PARAM_READWRITE));
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/**
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* ClutterBehaviourRotate:center-z:
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*
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* The z center of rotation.
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*
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* Since: 0.4
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*/
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g_object_class_install_property (gobject_class,
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PROP_CENTER_Z,
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g_param_spec_int ("center-z",
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"Center-Z",
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"Z center of rotation",
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-G_MAXINT, G_MAXINT,
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0,
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CLUTTER_PARAM_READWRITE));
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g_type_class_add_private (klass, sizeof (ClutterBehaviourRotatePrivate));
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}
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static void
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clutter_behaviour_rotate_init (ClutterBehaviourRotate *rotate)
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{
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ClutterBehaviourRotatePrivate *priv;
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rotate->priv = priv = CLUTTER_BEHAVIOUR_ROTATE_GET_PRIVATE (rotate);
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priv->angle_start = CLUTTER_FLOAT_TO_FIXED (0.0);
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priv->angle_end = CLUTTER_FLOAT_TO_FIXED (0.0);
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priv->axis = CLUTTER_Z_AXIS;
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priv->direction = CLUTTER_ROTATE_CW;
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priv->center_x = priv->center_y = priv->center_z = 0;
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}
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/**
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* clutter_behaviour_rotate_new:
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* @alpha: a #ClutterAlpha, or %NULL
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* @axis: the rotation axis
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* @direction: the rotation direction
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* @angle_start: the starting angle in degrees, between 0 and 360.
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* @angle_end: the final angle in degrees, between 0 and 360.
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*
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* Creates a new #ClutterBehaviourRotate. This behaviour will rotate actors
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* bound to it on @axis, following @direction, between @angle_start and
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* @angle_end. Angles >= 360 degrees will be clamped to the canonical interval
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* <0, 360), if angle_start == angle_end, the behaviour will carry out a
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* single rotation of 360 degrees.
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*
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* Return value: the newly created #ClutterBehaviourRotate.
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*
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* Since: 0.4
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*/
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ClutterBehaviour *
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clutter_behaviour_rotate_new (ClutterAlpha *alpha,
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ClutterRotateAxis axis,
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ClutterRotateDirection direction,
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gdouble angle_start,
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gdouble angle_end)
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{
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g_return_val_if_fail (alpha == NULL || CLUTTER_IS_ALPHA (alpha), NULL);
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return g_object_new (CLUTTER_TYPE_BEHAVIOUR_ROTATE,
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"alpha", alpha,
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"axis", axis,
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"direction", direction,
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"angle-start", angle_start,
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"angle-end", angle_end,
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NULL);
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}
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/**
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* clutter_behaviour_rotate_newx:
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* @alpha: a #ClutterAlpha or %NULL
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* @axis: the rotation axis
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* @direction: the rotation direction
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* @angle_start: the starting angle, in fixed point notation in degrees,
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* between 0 and 360.
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* @angle_end: the final angle, in fixed point notation in degrees, between 0
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* and 360.
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*
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* Creates a new #ClutterBehaviourRotate. This is the fixed point version
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* of clutter_behaviour_rotate_new().
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*
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* Return value: the newly created #ClutterBehaviourRotate.
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*
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* Since: 0.4
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*/
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ClutterBehaviour *
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clutter_behaviour_rotate_newx (ClutterAlpha *alpha,
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ClutterRotateAxis axis,
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ClutterRotateDirection direction,
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ClutterFixed angle_start,
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ClutterFixed angle_end)
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{
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ClutterBehaviour *retval;
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ClutterBehaviourRotatePrivate *priv;
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g_return_val_if_fail (alpha == NULL || CLUTTER_IS_ALPHA (alpha), NULL);
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retval = g_object_new (CLUTTER_TYPE_BEHAVIOUR_ROTATE,
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"alpha", alpha,
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"axis", axis,
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"direction", direction,
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NULL);
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/* we don't want to convert the angles from fixed to boolean
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* and then back again to fixed.
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*/
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priv = CLUTTER_BEHAVIOUR_ROTATE_GET_PRIVATE (retval);
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priv->angle_start = clamp_angle (angle_start);
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priv->angle_end = clamp_angle (angle_end);
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return retval;
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}
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/**
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* clutter_behaviour_rotate_get_axis:
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* @rotate: a #ClutterBehaviourRotate
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*
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* Retrieves the #ClutterRotateAxis used by the rotate behaviour.
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*
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* Return value: the rotation axis
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*
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* Since: 0.4
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*/
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ClutterRotateAxis
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clutter_behaviour_rotate_get_axis (ClutterBehaviourRotate *rotate)
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{
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g_return_val_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate), CLUTTER_Z_AXIS);
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return rotate->priv->axis;
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}
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/**
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* clutter_behaviour_rotate_set_axis:
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* @rotate: a #ClutterBehaviourRotate
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* @axis: a #ClutterRotateAxis
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*
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* Sets the axis used by the rotate behaviour.
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*
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* Since: 0.4
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*/
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void
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clutter_behaviour_rotate_set_axis (ClutterBehaviourRotate *rotate,
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ClutterRotateAxis axis)
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{
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ClutterBehaviourRotatePrivate *priv;
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g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
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priv = rotate->priv;
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if (priv->axis != axis)
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{
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priv->axis = axis;
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g_object_notify (G_OBJECT (rotate), "axis");
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}
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}
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/**
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* clutter_behaviour_rotate_get_direction:
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* @rotate: a #ClutterBehaviourRotate
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*
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* Retrieves the #ClutterRotateDirection used by the rotate behaviour.
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*
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* Return value: the rotation direction
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*
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* Since: 0.4
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*/
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ClutterRotateDirection
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clutter_behaviour_rotate_get_direction (ClutterBehaviourRotate *rotate)
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{
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g_return_val_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate),
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CLUTTER_ROTATE_CW);
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return rotate->priv->direction;
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}
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/**
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* clutter_behaviour_rotate_set_direction:
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* @rotate: a #ClutterBehaviourRotate
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* @direction: the rotation direction
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*
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* Sets the rotation direction used by the rotate behaviour.
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*
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* Since: 0.4
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*/
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void
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|
clutter_behaviour_rotate_set_direction (ClutterBehaviourRotate *rotate,
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ClutterRotateDirection direction)
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{
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|
ClutterBehaviourRotatePrivate *priv;
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|
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g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
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|
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priv = rotate->priv;
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if (priv->direction != direction)
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{
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priv->direction = direction;
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g_object_notify (G_OBJECT (rotate), "direction");
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}
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}
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/**
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* clutter_behaviour_rotate_get_bounds:
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* @rotate: a #ClutterBehaviourRotate
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* @angle_start: return value for the initial angle
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* @angle_end: return value for the final angle
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*
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* Retrieves the rotation boundaries of the rotate behaviour.
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*
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* Since: 0.4
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*/
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void
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clutter_behaviour_rotate_get_bounds (ClutterBehaviourRotate *rotate,
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gdouble *angle_start,
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gdouble *angle_end)
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{
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|
ClutterBehaviourRotatePrivate *priv;
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|
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g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
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|
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priv = rotate->priv;
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|
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if (angle_start)
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*angle_start = CLUTTER_FIXED_TO_DOUBLE (priv->angle_start);
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if (angle_end)
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*angle_end = CLUTTER_FIXED_TO_DOUBLE (priv->angle_end);
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}
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|
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/**
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|
* clutter_behaviour_rotate_set_bounds:
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* @rotate: a #ClutterBehaviourRotate
|
|
* @angle_start: initial angle in degrees, between 0 and 360.
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* @angle_end: final angle in degrees, between 0 and 360.
|
|
*
|
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* Sets the initial and final angles of a rotation behaviour; angles >= 360
|
|
* degrees get clamped to the canonical interval <0, 360).
|
|
*
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|
* Since: 0.4
|
|
*/
|
|
void
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clutter_behaviour_rotate_set_bounds (ClutterBehaviourRotate *rotate,
|
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gdouble angle_start,
|
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gdouble angle_end)
|
|
{
|
|
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
|
|
|
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clutter_behaviour_rotate_set_boundsx (rotate,
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CLUTTER_FLOAT_TO_FIXED (angle_start),
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CLUTTER_FLOAT_TO_FIXED (angle_end));
|
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}
|
|
|
|
/**
|
|
* clutter_behaviour_rotate_get_boundsx:
|
|
* @rotate: a #ClutterBehaviourRotate
|
|
* @angle_start: 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
|
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clutter_behaviour_rotate_get_boundsx (ClutterBehaviourRotate *rotate,
|
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ClutterFixed *angle_start,
|
|
ClutterFixed *angle_end)
|
|
{
|
|
ClutterBehaviourRotatePrivate *priv;
|
|
|
|
g_return_if_fail (CLUTTER_IS_BEHAVIOUR_ROTATE (rotate));
|
|
|
|
priv = rotate->priv;
|
|
|
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if (angle_start)
|
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*angle_start = priv->angle_start;
|
|
|
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if (angle_end)
|
|
*angle_end = priv->angle_end;
|
|
}
|
|
|
|
/**
|
|
* clutter_behaviour_rotate_set_boundsx:
|
|
* @rotate: a #ClutterBehaviourRotate
|
|
* @angle_start: initial angle, in fixed point notation in degrees, between 0
|
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* and 360.
|
|
* @angle_end: final angle, in fixed point notation in degress, between 0 and
|
|
* 360.
|
|
*
|
|
* Fixed point version of clutter_behaviour_rotate_set_bounds().
|
|
*
|
|
* Since: 0.4
|
|
*/
|
|
void
|
|
clutter_behaviour_rotate_set_boundsx (ClutterBehaviourRotate *rotate,
|
|
ClutterFixed angle_start,
|
|
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_start != angle_start)
|
|
{
|
|
priv->angle_start = clamp_angle (angle_start);
|
|
|
|
g_object_notify (G_OBJECT (rotate), "angle-start");
|
|
}
|
|
|
|
if (priv->angle_end != angle_end)
|
|
{
|
|
priv->angle_end = clamp_angle (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;
|
|
}
|