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ec3b1a7b90
Instead of using our own homegrown alpha functions, we should
use the easing functions also shared by other animation frameworks,
like jQuery and Tween, in the interests of code portability.
The easing functions have been defined by Robert Penner and
are divided into three categories:
In Out InOut
Each category has a particular curve:
Quadratic
Cubic
Quartic
Quintic
Sinusoidal
Exponential
Circular
In addition, there are "physical" curves:
Elastic
Back (overshooting cubic)
Bounce (exponentially decaying parabolic)
Finally, the Linear curve is also provided as a reference.
The functions are private, and are meant to be used only
through their logical id as provided by the AnimationMode
enumeration.
The tests should be updated as well to match the new
easing functions.
319 lines
9.4 KiB
C
319 lines
9.4 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) 2006 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, see <http://www.gnu.org/licenses/>.
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*/
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#if !defined(__CLUTTER_H_INSIDE__) && !defined(CLUTTER_COMPILATION)
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#error "Only <clutter/clutter.h> can be included directly."
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#endif
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#ifndef __CLUTTER_TYPES_H__
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#define __CLUTTER_TYPES_H__
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#include <glib-object.h>
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#include <clutter/clutter-units.h>
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G_BEGIN_DECLS
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#define CLUTTER_ANGLE_MAX_DEG 1509949439.6
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#define CLUTTER_TYPE_GEOMETRY (clutter_geometry_get_type ())
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#define CLUTTER_TYPE_KNOT (clutter_knot_get_type ())
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#define CLUTTER_TYPE_VERTEX (clutter_vertex_get_type ())
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/* Forward delarations to avoid header catch 22's */
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typedef struct _ClutterActor ClutterActor;
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typedef struct _ClutterStage ClutterStage;
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typedef struct _ClutterContainer ClutterContainer; /* dummy */
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typedef struct _ClutterChildMeta ClutterChildMeta;
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/**
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* ClutterGravity:
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* @CLUTTER_GRAVITY_NONE: Do not apply any gravity
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* @CLUTTER_GRAVITY_NORTH: Scale from topmost downwards
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* @CLUTTER_GRAVITY_NORTH_EAST: Scale from the top right corner
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* @CLUTTER_GRAVITY_EAST: Scale from the right side
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* @CLUTTER_GRAVITY_SOUTH_EAST: Scale from the bottom right corner
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* @CLUTTER_GRAVITY_SOUTH: Scale from the bottom upwards
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* @CLUTTER_GRAVITY_SOUTH_WEST: Scale from the bottom left corner
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* @CLUTTER_GRAVITY_WEST: Scale from the left side
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* @CLUTTER_GRAVITY_NORTH_WEST: Scale from the top left corner
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* @CLUTTER_GRAVITY_CENTER: Scale from the center.
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*
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* Gravity of the scaling operations. When a gravity different than
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* %CLUTTER_GRAVITY_NONE is used, an actor is scaled keeping the position
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* of the specified portion at the same coordinates.
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*
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* Since: 0.2
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*/
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typedef enum { /*< prefix=CLUTTER_GRAVITY >*/
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CLUTTER_GRAVITY_NONE = 0,
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CLUTTER_GRAVITY_NORTH,
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CLUTTER_GRAVITY_NORTH_EAST,
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CLUTTER_GRAVITY_EAST,
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CLUTTER_GRAVITY_SOUTH_EAST,
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CLUTTER_GRAVITY_SOUTH,
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CLUTTER_GRAVITY_SOUTH_WEST,
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CLUTTER_GRAVITY_WEST,
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CLUTTER_GRAVITY_NORTH_WEST,
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CLUTTER_GRAVITY_CENTER
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} ClutterGravity;
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typedef struct _ClutterGeometry ClutterGeometry;
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typedef struct _ClutterKnot ClutterKnot;
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typedef struct _ClutterVertex ClutterVertex;
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/**
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* ClutterGeometry:
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* @x: X coordinate of the top left corner of an actor
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* @y: Y coordinate of the top left corner of an actor
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* @width: width of an actor
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* @height: height of an actor
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*
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* The rectangle containing an actor's bounding box, measured in pixels.
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*/
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struct _ClutterGeometry
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{
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/*< public >*/
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gint x;
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gint y;
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guint width;
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guint height;
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};
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GType clutter_geometry_get_type (void) G_GNUC_CONST;
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/**
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* ClutterVertex:
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* @x: X coordinate of the vertex
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* @y: Y coordinate of the vertex
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* @z: Z coordinate of the vertex
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*
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* Vertex of an actor in 3D space, expressed in device independent units.
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*
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* Since: 0.4
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*/
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struct _ClutterVertex
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{
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ClutterUnit x;
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ClutterUnit y;
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ClutterUnit z;
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};
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GType clutter_vertex_get_type (void) G_GNUC_CONST;
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/**
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* ClutterKnot:
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* @x: X coordinate of the knot
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* @y: Y coordinate of the knot
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*
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* Point in a path behaviour.
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*
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* Since: 0.2
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*/
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struct _ClutterKnot
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{
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gint x;
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gint y;
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};
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GType clutter_knot_get_type (void) G_GNUC_CONST;
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ClutterKnot *clutter_knot_copy (const ClutterKnot *knot);
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void clutter_knot_free (ClutterKnot *knot);
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gboolean clutter_knot_equal (const ClutterKnot *knot_a,
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const ClutterKnot *knot_b);
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/**
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* ClutterRotateAxis:
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* @CLUTTER_X_AXIS: Rotate around the X axis
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* @CLUTTER_Y_AXIS: Rotate around the Y axis
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* @CLUTTER_Z_AXIS: Rotate around the Z axis
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*
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* Axis of a rotation.
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*
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* Since: 0.4
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*/
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typedef enum { /*< prefix=CLUTTER >*/
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CLUTTER_X_AXIS,
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CLUTTER_Y_AXIS,
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CLUTTER_Z_AXIS
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} ClutterRotateAxis;
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/**
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* ClutterRotateDirection:
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* @CLUTTER_ROTATE_CW: Clockwise rotation
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* @CLUTTER_ROTATE_CCW: Counter-clockwise rotation
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*
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* Direction of a rotation.
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*
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* Since: 0.4
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*/
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typedef enum { /*< prefix=CLUTTER_ROTATE >*/
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CLUTTER_ROTATE_CW,
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CLUTTER_ROTATE_CCW
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} ClutterRotateDirection;
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/**
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* ClutterRequestMode:
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* @CLUTTER_REQUEST_HEIGHT_FOR_WIDTH: Height for width requests
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* @CLUTTER_REQUEST_WIDTH_FOR_HEIGHT: Width for height requests
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*
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* Specifies the type of requests for a #ClutterActor.
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*
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* Since: 0.8
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*/
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typedef enum {
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CLUTTER_REQUEST_HEIGHT_FOR_WIDTH,
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CLUTTER_REQUEST_WIDTH_FOR_HEIGHT
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} ClutterRequestMode;
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/**
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* ClutterAnimationMode:
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* @CLUTTER_CUSTOM_MODE: custom progress function
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* @CLUTTER_LINEAR: linear tweening
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* @CLUTTER_EASE_IN_QUAD: quadratic tweening
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* @CLUTTER_EASE_OUT_QUAD: quadratic tweening, inverse of
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* %CLUTTER_EASE_IN_QUAD
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* @CLUTTER_EASE_IN_OUT_QUAD: quadratic tweening, combininig
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* %CLUTTER_EASE_IN_QUAD and %CLUTTER_EASE_OUT_QUAD
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* @CLUTTER_EASE_IN_CUBIC: cubic tweening
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* @CLUTTER_EASE_OUT_CUBIC: cubic tweening, invers of
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* %CLUTTER_EASE_IN_CUBIC
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* @CLUTTER_EASE_IN_OUT_CUBIC: cubic tweening, combining
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* %CLUTTER_EASE_IN_CUBIC and %CLUTTER_EASE_OUT_CUBIC
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* @CLUTTER_EASE_IN_QUART: quartic tweening
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* @CLUTTER_EASE_OUT_QUART: quartic tweening, inverse of
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* %CLUTTER_EASE_IN_QUART
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* @CLUTTER_EASE_IN_OUT_QUART: quartic tweening, combining
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* %CLUTTER_EASE_IN_QUART and %CLUTTER_EASE_OUT_QUART
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* @CLUTTER_EASE_IN_QUINT: quintic tweening
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* @CLUTTER_EASE_OUT_QUINT: quintic tweening, inverse of
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* %CLUTTER_EASE_IN_QUINT
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* @CLUTTER_EASE_IN_OUT_QUINT: fifth power tweening, combining
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* %CLUTTER_EASE_IN_QUINT and %CLUTTER_EASE_OUT_QUINT
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* @CLUTTER_EASE_IN_SINE: sinusoidal tweening
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* @CLUTTER_EASE_OUT_SINE: sinusoidal tweening, inverse of
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* %CLUTTER_EASE_IN_SINE
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* @CLUTTER_EASE_IN_OUT_SINE: sine wave tweening, combining
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* %CLUTTER_EASE_IN_SINE and %CLUTTER_EASE_OUT_SINE
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* @CLUTTER_EASE_IN_EXPO: exponential tweening
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* @CLUTTER_EASE_OUT_EXPO: exponential tweening, inverse of
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* %CLUTTER_EASE_IN_EXPO
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* @CLUTTER_EASE_IN_OUT_EXPO: exponential tweening, combining
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* %CLUTTER_EASE_IN_EXPO and %CLUTTER_EASE_OUT_EXPO
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* @CLUTTER_EASE_IN_CIRC: circular tweening
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* @CLUTTER_EASE_OUT_CIRC: circular tweening, inverse of
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* %CLUTTER_EASE_IN_CIRC
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* @CLUTTER_EASE_IN_OUT_CIRC: circular tweening, combining
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* %CLUTTER_EASE_IN_CIRC and %CLUTTER_EASE_OUT_CIRC
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* @CLUTTER_EASE_IN_ELASTIC: elastic tweening, with offshoot on start
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* @CLUTTER_EASE_OUT_ELASTIC: elastic tweening, with offshoot on end
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* @CLUTTER_EASE_IN_OUT_ELASTIC: elastic tweening with offshoot on both ends
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* @CLUTTER_EASE_IN_BACK: overshooting cubic tweening, with
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* backtracking on start
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* @CLUTTER_EASE_OUT_BACK: overshooting cubic tweening, with
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* backtracking on end
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* @CLUTTER_EASE_IN_OUT_BACK: overshooting cubic tweening, with
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* backtracking on both ends
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* @CLUTTER_EASE_IN_BOUNCE: exponentially decaying parabolic (bounce)
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* tweening, with bounce on start
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* @CLUTTER_EASE_OUT_BOUNCE: exponentially decaying parabolic (bounce)
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* tweening, with bounce on end
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* @CLUTTER_EASE_IN_OUT_BOUNCE: exponentially decaying parabolic (bounce)
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* tweening, with bounce on both ends
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* @CLUTTER_ANIMATION_LAST: last animation mode, used as a guard for
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* registered global alpha functions
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*
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* The animation modes used by #ClutterAlpha and #ClutterAnimation. This
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* enumeration can be expanded in later versions of Clutter. See the
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* #ClutterAlpha documentation for a graph of all the animation modes.
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*
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* Every global alpha function registered using clutter_alpha_register_func()
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* or clutter_alpha_register_closure() will have a logical id greater than
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* %CLUTTER_ANIMATION_LAST.
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*
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* Since: 1.0
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*/
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typedef enum {
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CLUTTER_CUSTOM_MODE = 0,
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/* linear */
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CLUTTER_LINEAR,
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/* quadratic */
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CLUTTER_EASE_IN_QUAD,
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CLUTTER_EASE_OUT_QUAD,
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CLUTTER_EASE_IN_OUT_QUAD,
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/* cubic */
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CLUTTER_EASE_IN_CUBIC,
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CLUTTER_EASE_OUT_CUBIC,
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CLUTTER_EASE_IN_OUT_CUBIC,
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/* quartic */
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CLUTTER_EASE_IN_QUART,
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CLUTTER_EASE_OUT_QUART,
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CLUTTER_EASE_IN_OUT_QUART,
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/* quintic */
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CLUTTER_EASE_IN_QUINT,
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CLUTTER_EASE_OUT_QUINT,
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CLUTTER_EASE_IN_OUT_QUINT,
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/* sinusoidal */
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CLUTTER_EASE_IN_SINE,
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CLUTTER_EASE_OUT_SINE,
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CLUTTER_EASE_IN_OUT_SINE,
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/* exponential */
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CLUTTER_EASE_IN_EXPO,
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CLUTTER_EASE_OUT_EXPO,
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CLUTTER_EASE_IN_OUT_EXPO,
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/* circular */
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CLUTTER_EASE_IN_CIRC,
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CLUTTER_EASE_OUT_CIRC,
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CLUTTER_EASE_IN_OUT_CIRC,
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/* elastic */
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CLUTTER_EASE_IN_ELASTIC,
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CLUTTER_EASE_OUT_ELASTIC,
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CLUTTER_EASE_IN_OUT_ELASTIC,
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/* overshooting cubic */
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CLUTTER_EASE_IN_BACK,
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CLUTTER_EASE_OUT_BACK,
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CLUTTER_EASE_IN_OUT_BACK,
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/* exponentially decaying parabolic */
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CLUTTER_EASE_IN_BOUNCE,
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CLUTTER_EASE_OUT_BOUNCE,
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CLUTTER_EASE_IN_OUT_BOUNCE,
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/* guard, before registered alpha functions */
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CLUTTER_ANIMATION_LAST
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} ClutterAnimationMode;
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G_END_DECLS
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#endif /* __CLUTTER_TYPES_H__ */
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