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Convert the rotation centers to be AnchorCoords

Browse Source 
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);
This commit is contained in:
Neil Roberts 2009-01-23 15:55:41 +00:00
parent a8a986a1a2
commit d5e5d35316
3 changed files with 193 additions and 269 deletions
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391
clutter/clutter-actor.c
View File

@ -250,21 +250,18 @@ struct _ClutterActorPrivate
ClutterUnit clip[4];
/* Rotation angles */
ClutterFixed rxang;
ClutterFixed ryang;
ClutterFixed rzang;
gdouble rxang;
gdouble ryang;
gdouble rzang;
/* Rotation center: X axis */
ClutterUnit rxy;
ClutterUnit rxz;
AnchorCoord rx_center;
/* Rotation center: Y axis */
ClutterUnit ryx;
ClutterUnit ryz;
AnchorCoord ry_center;
/* Rotation center: Z axis */
ClutterUnit rzx;
ClutterUnit rzy;
AnchorCoord rz_center;
/* Anchor point coordinates */
AnchorCoord anchor;
@ -353,6 +350,10 @@ enum
PROP_ROTATION_CENTER_X,
PROP_ROTATION_CENTER_Y,
PROP_ROTATION_CENTER_Z,
/* This property only makes sense for the z rotation because the
others would depend on the actor having a size along the
z-axis */
PROP_ROTATION_CENTER_Z_GRAVITY,
PROP_ANCHOR_X,
PROP_ANCHOR_Y,
@ -1422,6 +1423,9 @@ _clutter_actor_apply_modelview_transform (ClutterActor *self)
CLUTTER_UNITS_TO_FLOAT (priv->allocation.y1),
0);
if (priv->z)
cogl_translate (0, 0, priv->z);
/*
* because the rotation involves translations, we must scale before
* applying the rotations (if we apply the scale after the rotations,
@ -1433,43 +1437,19 @@ _clutter_actor_apply_modelview_transform (ClutterActor *self)
cogl_scale (priv->scale_x, priv->scale_y));
if (priv->rzang)
{
cogl_translate (CLUTTER_UNITS_TO_FLOAT (priv->rzx),
CLUTTER_UNITS_TO_FLOAT (priv->rzy),
0);
cogl_rotate (priv->rzang, 0, 0, 1.0);
cogl_translate (CLUTTER_UNITS_TO_FLOAT (-priv->rzx),
CLUTTER_UNITS_TO_FLOAT (-priv->rzy),
0);
}
TRANSFORM_ABOUT_ANCHOR_COORD (self, &priv->rz_center,
cogl_rotate (priv->rzang,
0, 0, 1.0));
if (priv->ryang)
{
cogl_translate (CLUTTER_UNITS_TO_FLOAT (priv->ryx),
0,
CLUTTER_UNITS_TO_FLOAT (priv->z + priv->ryz));
cogl_rotate (priv->ryang, 0, 1.0, 0);
cogl_translate (CLUTTER_UNITS_TO_FLOAT (-priv->ryx),
0,
CLUTTER_UNITS_TO_FLOAT (-(priv->z + priv->ryz)));
}
TRANSFORM_ABOUT_ANCHOR_COORD (self, &priv->ry_center,
cogl_rotate (priv->ryang,
0, 1.0, 0));
if (priv->rxang)
{
cogl_translate (0,
CLUTTER_UNITS_TO_FLOAT (priv->rxy),
CLUTTER_UNITS_TO_FLOAT (priv->z + priv->rxz));
cogl_rotate (priv->rxang, 1.0, 0, 0);
cogl_translate (0,
CLUTTER_UNITS_TO_FLOAT (-priv->rxy),
CLUTTER_UNITS_TO_FLOAT (-(priv->z + priv->rxz)));
}
TRANSFORM_ABOUT_ANCHOR_COORD (self, &priv->rx_center,
cogl_rotate (priv->rxang,
1.0, 0, 0));
if (!is_stage && !clutter_anchor_coord_is_zero (&priv->anchor))
{
@ -1477,9 +1457,6 @@ _clutter_actor_apply_modelview_transform (ClutterActor *self)
clutter_anchor_coord_get_units (self, &priv->anchor, &x, &y, &z);
cogl_translate (-x, -y, -z);
}
if (priv->z)
cogl_translate (0, 0, priv->z);
}
/* Recursively applies the transforms associated with this actor and
@ -1602,17 +1579,13 @@ clutter_actor_paint (ClutterActor *self)
CLUTTER_UNSET_PRIVATE_FLAGS (self, CLUTTER_ACTOR_IN_PAINT);
}
/* fixed point, unit based rotation setter, to be used by
* set_property() so that we don't lose precision in the
* center coordinates by converting them to and from units
/* internal helper function set the rotation angle without affecting
the center point
*/
static inline void
static void
clutter_actor_set_rotation_internal (ClutterActor *self,
ClutterRotateAxis axis,
ClutterFixed angle,
ClutterUnit center_x,
ClutterUnit center_y,
ClutterUnit center_z)
gdouble angle)
{
ClutterActorPrivate *priv = self->priv;
@ -1623,26 +1596,17 @@ clutter_actor_set_rotation_internal (ClutterActor *self,
{
case CLUTTER_X_AXIS:
priv->rxang = angle;
priv->rxy = center_y;
priv->rxz = center_z;
g_object_notify (G_OBJECT (self), "rotation-angle-x");
g_object_notify (G_OBJECT (self), "rotation-center-x");
break;
case CLUTTER_Y_AXIS:
priv->ryang = angle;
priv->ryx = center_x;
priv->ryz = center_z;
g_object_notify (G_OBJECT (self), "rotation-angle-y");
g_object_notify (G_OBJECT (self), "rotation-center-y");
break;
case CLUTTER_Z_AXIS:
priv->rzang = angle;
priv->rzx = center_x;
priv->rzy = center_y;
g_object_notify (G_OBJECT (self), "rotation-angle-z");
g_object_notify (G_OBJECT (self), "rotation-center-z");
break;
}
@ -1788,86 +1752,63 @@ clutter_actor_set_property (GObject *object,
clutter_actor_set_reactive (actor, g_value_get_boolean (value));
break;
case PROP_ROTATION_ANGLE_X:
{
ClutterFixed angle;
angle = CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
clutter_actor_set_rotation_internal (actor,
CLUTTER_X_AXIS,
angle,
0,
priv->rxy,
priv->rxz);
}
g_value_get_double (value));
break;
case PROP_ROTATION_ANGLE_Y:
{
ClutterFixed angle;
angle = CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
clutter_actor_set_rotation_internal (actor,
CLUTTER_Y_AXIS,
angle,
priv->ryx,
0,
priv->ryz);
}
g_value_get_double (value));
break;
case PROP_ROTATION_ANGLE_Z:
{
ClutterFixed angle;
angle = CLUTTER_FLOAT_TO_FIXED (g_value_get_double (value));
clutter_actor_set_rotation_internal (actor,
CLUTTER_Z_AXIS,
angle,
priv->rzx,
priv->rzy,
0);
}
g_value_get_double (value));
break;
case PROP_ROTATION_CENTER_X:
{
ClutterVertex *center;
const ClutterVertex *center;
center = g_value_get_boxed (value);
if (center)
clutter_actor_set_rotation_internal (actor,
if ((center = g_value_get_boxed (value)))
clutter_actor_set_rotation (actor,
CLUTTER_X_AXIS,
priv->rxang,
0,
center->x,
center->y,
center->z);
}
break;
case PROP_ROTATION_CENTER_Y:
{
ClutterVertex *center;
const ClutterVertex *center;
center = g_value_get_boxed (value);
if (center)
clutter_actor_set_rotation_internal (actor,
if ((center = g_value_get_boxed (value)))
clutter_actor_set_rotation (actor,
CLUTTER_Y_AXIS,
priv->ryang,
center->x,
0,
center->y,
center->z);
}
break;
case PROP_ROTATION_CENTER_Z:
{
ClutterVertex *center;
const ClutterVertex *center;
center = g_value_get_boxed (value);
if (center)
clutter_actor_set_rotation_internal (actor,
if ((center = g_value_get_boxed (value)))
clutter_actor_set_rotation (actor,
CLUTTER_Z_AXIS,
priv->rzang,
center->x,
center->y,
0);
center->z);
}
break;
case PROP_ROTATION_CENTER_Z_GRAVITY:
clutter_actor_set_z_rotation_from_gravity
(actor, priv->rzang, g_value_get_enum (value));
break;
case PROP_ANCHOR_X:
{
int anchor_x = g_value_get_int (value);
@ -2025,44 +1966,47 @@ clutter_actor_get_property (GObject *object,
g_value_set_boolean (value, clutter_actor_get_reactive (actor));
break;
case PROP_ROTATION_ANGLE_X:
g_value_set_double (value, CLUTTER_FIXED_TO_DOUBLE (priv->rxang));
g_value_set_double (value, priv->rxang);
break;
case PROP_ROTATION_ANGLE_Y:
g_value_set_double (value, CLUTTER_FIXED_TO_DOUBLE (priv->ryang));
g_value_set_double (value, priv->ryang);
break;
case PROP_ROTATION_ANGLE_Z:
g_value_set_double (value, CLUTTER_FIXED_TO_DOUBLE (priv->rzang));
g_value_set_double (value, priv->rzang);
break;
case PROP_ROTATION_CENTER_X:
{
ClutterVertex center = { 0, };
ClutterVertex center;
center.y = priv->rxy;
center.z = priv->rxz;
clutter_actor_get_rotationu (actor, CLUTTER_X_AXIS,
&center.x, &center.y, &center.z);
g_value_set_boxed (value, &center);
}
break;
case PROP_ROTATION_CENTER_Y:
{
ClutterVertex center = { 0, };
ClutterVertex center;
center.x = priv->ryx;
center.z = priv->ryz;
clutter_actor_get_rotationu (actor, CLUTTER_Y_AXIS,
&center.x, &center.y, &center.z);
g_value_set_boxed (value, &center);
}
break;
case PROP_ROTATION_CENTER_Z:
{
ClutterVertex center = { 0, };
ClutterVertex center;
center.x = priv->rzx;
center.y = priv->rzy;
clutter_actor_get_rotationu (actor, CLUTTER_Z_AXIS,
&center.x, &center.y, &center.z);
g_value_set_boxed (value, &center);
}
break;
case PROP_ROTATION_CENTER_Z_GRAVITY:
g_value_set_enum (value, clutter_actor_get_z_rotation_gravity (actor));
break;
case PROP_ANCHOR_X:
{
ClutterUnit anchor_x;
@ -2749,6 +2693,24 @@ clutter_actor_class_init (ClutterActorClass *klass)
"The rotation center on the Z axis",
CLUTTER_TYPE_VERTEX,
CLUTTER_PARAM_READWRITE));
/**
* ClutterActor:rotation-center-z-gravity:
*
* The rotation center on the Z axis expressed as a #ClutterGravity.
*
* Since: 1.0
*/
pspec = g_param_spec_enum ("rotation-center-z-gravity",
"Rotation-Center-Z-Gravity",
"Center point for rotation around the Z axis",
CLUTTER_TYPE_GRAVITY,
CLUTTER_GRAVITY_NONE,
CLUTTER_PARAM_READWRITE);
g_object_class_install_property (object_class,
PROP_ROTATION_CENTER_Z_GRAVITY,
pspec);
/**
* ClutterActor:anchor-x:
*
@ -5538,42 +5500,35 @@ clutter_actor_set_rotationu (ClutterActor *self,
ClutterUnit y,
ClutterUnit z)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_set_rotation_internal (self, axis,
CLUTTER_FLOAT_TO_FIXED (angle),
x, y, z);
priv = self->priv;
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_set_rotation_internal (self, axis, angle);
switch (axis)
{
case CLUTTER_X_AXIS:
clutter_anchor_coord_set_units (&priv->rx_center, x, y, z);
g_object_notify (G_OBJECT (self), "rotation-center-x");
break;
case CLUTTER_Y_AXIS:
clutter_anchor_coord_set_units (&priv->ry_center, x, y, z);
g_object_notify (G_OBJECT (self), "rotation-center-y");
break;
case CLUTTER_Z_AXIS:
if (priv->rz_center.is_fractional)
g_object_notify (G_OBJECT (self), "rotation-center-z-gravity");
clutter_anchor_coord_set_units (&priv->rz_center, x, y, z);
g_object_notify (G_OBJECT (self), "rotation-center-z");
break;
}
/**
* clutter_actor_set_rotationx:
* @self: a #ClutterActor
* @axis: the axis of rotation
* @angle: the angle of rotation
* @x: X coordinate of the rotation center
* @y: Y coordinate of the rotation center
* @z: Z coordinate of the rotation center
*
* Sets the rotation angle of @self around the given axis.
*
* This function is the fixed point variant of clutter_actor_set_rotation().
*
* Since: 0.6
*/
void
clutter_actor_set_rotationx (ClutterActor *self,
ClutterRotateAxis axis,
ClutterFixed angle,
gint x,
gint y,
gint z)
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_set_rotation_internal (self, axis, angle,
CLUTTER_UNITS_FROM_DEVICE (x),
CLUTTER_UNITS_FROM_DEVICE (y),
CLUTTER_UNITS_FROM_DEVICE (z));
g_object_thaw_notify (G_OBJECT (self));
}
/**
@ -5610,9 +5565,37 @@ clutter_actor_set_rotation (ClutterActor *self,
{
g_return_if_fail (CLUTTER_IS_ACTOR (self));
clutter_actor_set_rotationx (self, axis,
CLUTTER_FLOAT_TO_FIXED (angle),
x, y, z);
clutter_actor_set_rotationu (self, axis, angle,
CLUTTER_UNITS_FROM_DEVICE (x),
CLUTTER_UNITS_FROM_DEVICE (y),
CLUTTER_UNITS_FROM_DEVICE (z));
}
void
clutter_actor_set_z_rotation_from_gravity (ClutterActor *self,
gdouble angle,
ClutterGravity gravity)
{
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (self));
if (gravity == CLUTTER_GRAVITY_NONE)
clutter_actor_set_rotation (self, CLUTTER_Z_AXIS, angle, 0, 0, 0);
else
{
priv = self->priv;
g_object_freeze_notify (G_OBJECT (self));
clutter_actor_set_rotation_internal (self, CLUTTER_Z_AXIS, angle);
clutter_anchor_coord_set_gravity (&priv->rz_center, gravity);
g_object_notify (G_OBJECT (self), "rotation-center-z-gravity");
g_object_notify (G_OBJECT (self), "rotation-center-z");
g_object_thaw_notify (G_OBJECT (self));
}
}
/**
@ -5644,6 +5627,7 @@ clutter_actor_get_rotationu (ClutterActor *self,
{
ClutterActorPrivate *priv;
gdouble retval = 0;
AnchorCoord *anchor_coord = NULL;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
@ -5652,91 +5636,23 @@ clutter_actor_get_rotationu (ClutterActor *self,
switch (axis)
{
case CLUTTER_X_AXIS:
retval = CLUTTER_FIXED_TO_DOUBLE (priv->rxang);
if (y)
*y = priv->rxy;
if (z)
*z = priv->rxz;
break;
case CLUTTER_Y_AXIS:
retval = CLUTTER_FIXED_TO_DOUBLE (priv->ryang);
if (x)
*x = priv->ryx;
if (z)
*z = priv->ryz;
break;
case CLUTTER_Z_AXIS:
retval = CLUTTER_FIXED_TO_DOUBLE (priv->rzang);
if (x)
*x = priv->rzx;
if (y)
*y = priv->rzy;
break;
}
return retval;
}
/**
* clutter_actor_get_rotationx:
* @self: a #ClutterActor
* @axis: the axis of rotation
* @x: return value for the X coordinate of the center of rotation
* @y: return value for the Y coordinate of the center of rotation
* @z: return value for the Z coordinate of the center of rotation
*
* Retrieves the angle and center of rotation on the given axis,
* set using clutter_actor_set_rotation().
*
* This function is the fixed point variant of clutter_actor_get_rotation().
*
* Return value: the angle of rotation as a fixed point value.
*
* Since: 0.6
*/
ClutterFixed
clutter_actor_get_rotationx (ClutterActor *self,
ClutterRotateAxis axis,
gint *x,
gint *y,
gint *z)
{
ClutterActorPrivate *priv;
ClutterFixed retval = 0;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0);
priv = self->priv;
switch (axis)
{
case CLUTTER_X_AXIS:
anchor_coord = &priv->rx_center;
retval = priv->rxang;
if (y)
*y = CLUTTER_UNITS_TO_DEVICE (priv->rxy);
if (z)
*z = CLUTTER_UNITS_TO_DEVICE (priv->rxz);
break;
case CLUTTER_Y_AXIS:
anchor_coord = &priv->ry_center;
retval = priv->ryang;
if (x)
*x = CLUTTER_UNITS_TO_DEVICE (priv->ryx);
if (z)
*z = CLUTTER_UNITS_TO_DEVICE (priv->ryz);
break;
case CLUTTER_Z_AXIS:
anchor_coord = &priv->rz_center;
retval = priv->rzang;
if (x)
*x = CLUTTER_UNITS_TO_DEVICE (priv->rzx);
if (y)
*y = CLUTTER_UNITS_TO_DEVICE (priv->rzy);
break;
}
clutter_anchor_coord_get_units (self, anchor_coord, x, y, z);
return retval;
}
@ -5765,11 +5681,26 @@ clutter_actor_get_rotation (ClutterActor *self,
gint *y,
gint *z)
{
ClutterUnit xu, yu, zu;
gdouble angle;
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0.0);
return CLUTTER_FIXED_TO_FLOAT (clutter_actor_get_rotationx (self,
axis,
x, y, z));
angle = clutter_actor_get_rotationu (self, axis, &xu, &yu, &zu);
*x = CLUTTER_UNITS_TO_DEVICE (xu);
*y = CLUTTER_UNITS_TO_DEVICE (yu);
*z = CLUTTER_UNITS_TO_DEVICE (zu);
return angle;
}
ClutterGravity
clutter_actor_get_z_rotation_gravity (ClutterActor *self)
{
g_return_val_if_fail (CLUTTER_IS_ACTOR (self), 0.0);
return clutter_anchor_coord_get_gravity (&self->priv->rz_center);
}
/**
@ -6905,7 +6836,7 @@ out:
typedef struct {
ClutterRotateAxis axis;
ClutterFixed angle;
gdouble angle;
ClutterUnit center_x;
ClutterUnit center_y;
@ -6925,7 +6856,7 @@ parse_rotation_array (ClutterActor *actor,
/* angle */
element = json_array_get_element (array, 0);
if (JSON_NODE_TYPE (element) == JSON_NODE_VALUE)
info->angle = CLUTTER_FLOAT_TO_FIXED (json_node_get_double (element));
info->angle = json_node_get_double (element);
else
return FALSE;
@ -7138,7 +7069,7 @@ clutter_actor_set_custom_property (ClutterScriptable *scriptable,
info = g_value_get_pointer (value);
clutter_actor_set_rotation_internal (CLUTTER_ACTOR (scriptable),
clutter_actor_set_rotationu (CLUTTER_ACTOR (scriptable),
info->axis, info->angle,
info->center_x,
info->center_y,

15
clutter/clutter-actor.h
View File

@ -390,33 +390,26 @@ void clutter_actor_set_rotation (ClutterActor
gint x,
gint y,
gint z);
void clutter_actor_set_rotationx (ClutterActor *self,
ClutterRotateAxis axis,
ClutterFixed angle,
gint x,
gint y,
gint z);
void clutter_actor_set_rotationu (ClutterActor *self,
ClutterRotateAxis axis,
gdouble angle,
ClutterUnit x,
ClutterUnit y,
ClutterUnit z);
void clutter_actor_set_z_rotation_from_gravity (ClutterActor *self,
gdouble angle,
ClutterGravity gravity);
gdouble clutter_actor_get_rotation (ClutterActor *self,
ClutterRotateAxis axis,
gint *x,
gint *y,
gint *z);
ClutterFixed clutter_actor_get_rotationx (ClutterActor *self,
ClutterRotateAxis axis,
gint *x,
gint *y,
gint *z);
gdouble clutter_actor_get_rotationu (ClutterActor *self,
ClutterRotateAxis axis,
ClutterUnit *x,
ClutterUnit *y,
ClutterUnit *z);
ClutterGravity clutter_actor_get_z_rotation_gravity (ClutterActor *self);
void clutter_actor_set_opacity (ClutterActor *self,
guint8 opacity);

4
clutter/clutter-behaviour-rotate.c
View File

@ -95,8 +95,8 @@ alpha_notify_foreach (ClutterBehaviour *behaviour,
rotate_behaviour = CLUTTER_BEHAVIOUR_ROTATE (behaviour);
priv = rotate_behaviour->priv;
clutter_actor_set_rotationx (actor, priv->axis,
angle,
clutter_actor_set_rotation (actor, priv->axis,
CLUTTER_FIXED_TO_DOUBLE (angle),
priv->center_x,
priv->center_y,
priv->center_z);