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paint-volume: remove more is_axis_aligned assertions

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This removes the is_axis_aligned assertions for the width/height/depth
getters and setters, since for example it is legitimate to query the
width, height or depth of a container's child actors which aren't
necessarily axis aligned.

Signed-off-by: Emmanuele Bassi <ebassi@linux.intel.com>
This commit is contained in:
Robert Bragg 2011-06-22 19:54:19 +01:00
parent cc5808387e
commit 8bc265d22c
1 changed files with 114 additions and 17 deletions
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131
clutter/clutter-paint-volume.c
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@ -242,7 +242,8 @@ _clutter_paint_volume_update_is_empty (ClutterPaintVolume *pv)
* @pv: a #ClutterPaintVolume
* @width: the width of the paint volume, in pixels
*
* Sets the width of the paint volume.
* Sets the width of the paint volume. The width is measured along
* the x axis in the actor coordinates that @pv is associated with.
*
* Since: 1.6
*/
@ -253,7 +254,6 @@ clutter_paint_volume_set_width (ClutterPaintVolume *pv,
gfloat right_xpos;
g_return_if_fail (pv != NULL);
g_return_if_fail (pv->is_axis_aligned);
g_return_if_fail (width >= 0.0f);
/* If the volume is currently empty then only the origin is
@ -261,6 +261,9 @@ clutter_paint_volume_set_width (ClutterPaintVolume *pv,
if (pv->is_empty)
pv->vertices[1] = pv->vertices[3] = pv->vertices[4] = pv->vertices[0];
if (!pv->is_axis_aligned)
_clutter_paint_volume_axis_align (pv);
right_xpos = pv->vertices[0].x + width;
/* Move the right vertices of the paint box relative to the
@ -279,9 +282,30 @@ clutter_paint_volume_set_width (ClutterPaintVolume *pv,
* clutter_paint_volume_get_width:
* @pv: a #ClutterPaintVolume
*
* Retrieves the width set using clutter_paint_volume_get_width()
* Retrieves the width of the volume's, axis aligned, bounding box.
*
* Return value: the width, in pixels
* In other words; this takes into account what actor's coordinate
* space @pv belongs too and conceptually fits an axis aligned box
* around the volume. It returns the size of that bounding box as
* measured along the x-axis.
*
* <note>If, for example, clutter_actor_get_transformed_paint_volume()
* is used to transform a 2D child actor that is 100px wide, 100px
* high and 0px deep into container coordinates then the width might
* not simply be 100px if the child actor has a 3D rotation applied to
* it.
*
* Remember; after clutter_actor_get_transformed_paint_volume() is
* used then a transformed child volume will be defined relative to the
* ancestor container actor and so a 2D child actor
* can have a 3D bounding volume.</note>
*
* <note>There are no accuracy guarantees for the reported width,
* except that it must always be >= to the true width. This is
* because actors may report simple, loose fitting paint-volumes
* for efficiency</note>
* Return value: the width, in units of @pv's local coordinate system.
*
* Since: 1.6
*/
@ -289,10 +313,19 @@ gfloat
clutter_paint_volume_get_width (const ClutterPaintVolume *pv)
{
g_return_val_if_fail (pv != NULL, 0.0);
g_return_val_if_fail (pv->is_axis_aligned, 0);
if (pv->is_empty)
return 0;
else if (!pv->is_axis_aligned)
{
ClutterPaintVolume tmp;
float width;
_clutter_paint_volume_copy_static (pv, &tmp);
_clutter_paint_volume_axis_align (&tmp);
width = tmp.vertices[1].x - tmp.vertices[0].x;
clutter_paint_volume_free (&tmp);
return width;
}
else
return pv->vertices[1].x - pv->vertices[0].x;
}
@ -302,7 +335,8 @@ clutter_paint_volume_get_width (const ClutterPaintVolume *pv)
* @pv: a #ClutterPaintVolume
* @height: the height of the paint volume, in pixels
*
* Sets the height of the paint volume.
* Sets the height of the paint volume. The height is measured along
* the y axis in the actor coordinates that @pv is associated with.
*
* Since: 1.6
*/
@ -313,7 +347,6 @@ clutter_paint_volume_set_height (ClutterPaintVolume *pv,
gfloat height_ypos;
g_return_if_fail (pv != NULL);
g_return_if_fail (pv->is_axis_aligned);
g_return_if_fail (height >= 0.0f);
/* If the volume is currently empty then only the origin is
@ -321,6 +354,9 @@ clutter_paint_volume_set_height (ClutterPaintVolume *pv,
if (pv->is_empty)
pv->vertices[1] = pv->vertices[3] = pv->vertices[4] = pv->vertices[0];
if (!pv->is_axis_aligned)
_clutter_paint_volume_axis_align (pv);
height_ypos = pv->vertices[0].y + height;
/* Move the bottom vertices of the paint box relative to the
@ -338,10 +374,30 @@ clutter_paint_volume_set_height (ClutterPaintVolume *pv,
* clutter_paint_volume_get_height:
* @pv: a #ClutterPaintVolume
*
* Retrieves the height of the paint volume set using
* clutter_paint_volume_get_height()
* Retrieves the height of the volume's, axis aligned, bounding box.
*
* Return value: the height of the paint volume, in pixels
* In other words; this takes into account what actor's coordinate
* space @pv belongs too and conceptually fits an axis aligned box
* around the volume. It returns the size of that bounding box as
* measured along the y-axis.
*
* <note>If, for example, clutter_actor_get_transformed_paint_volume()
* is used to transform a 2D child actor that is 100px wide, 100px
* high and 0px deep into container coordinates then the height might
* not simply be 100px if the child actor has a 3D rotation applied to
* it.
*
* Remember; after clutter_actor_get_transformed_paint_volume() is
* used then a transformed child volume will be defined relative to the
* ancestor container actor and so a 2D child actor
* can have a 3D bounding volume.</note>
*
* <note>There are no accuracy guarantees for the reported height,
* except that it must always be >= to the true height. This is
* because actors may report simple, loose fitting paint-volumes
* for efficiency</note>
*
* Return value: the height, in units of @pv's local coordinate system.
*
* Since: 1.6
*/
@ -349,10 +405,19 @@ gfloat
clutter_paint_volume_get_height (const ClutterPaintVolume *pv)
{
g_return_val_if_fail (pv != NULL, 0.0);
g_return_val_if_fail (pv->is_axis_aligned, 0);
if (pv->is_empty)
return 0;
else if (!pv->is_axis_aligned)
{
ClutterPaintVolume tmp;
float height;
_clutter_paint_volume_copy_static (pv, &tmp);
_clutter_paint_volume_axis_align (&tmp);
height = tmp.vertices[3].y - tmp.vertices[0].y;
clutter_paint_volume_free (&tmp);
return height;
}
else
return pv->vertices[3].y - pv->vertices[0].y;
}
@ -362,7 +427,8 @@ clutter_paint_volume_get_height (const ClutterPaintVolume *pv)
* @pv: a #ClutterPaintVolume
* @depth: the depth of the paint volume, in pixels
*
* Sets the depth of the paint volume.
* Sets the depth of the paint volume. The depth is measured along
* the z axis in the actor coordinates that @pv is associated with.
*
* Since: 1.6
*/
@ -373,7 +439,6 @@ clutter_paint_volume_set_depth (ClutterPaintVolume *pv,
gfloat depth_zpos;
g_return_if_fail (pv != NULL);
g_return_if_fail (pv->is_axis_aligned);
g_return_if_fail (depth >= 0.0f);
/* If the volume is currently empty then only the origin is
@ -381,6 +446,9 @@ clutter_paint_volume_set_depth (ClutterPaintVolume *pv,
if (pv->is_empty)
pv->vertices[1] = pv->vertices[3] = pv->vertices[4] = pv->vertices[0];
if (!pv->is_axis_aligned)
_clutter_paint_volume_axis_align (pv);
depth_zpos = pv->vertices[0].z + depth;
/* Move the back vertices of the paint box relative to the
@ -399,10 +467,30 @@ clutter_paint_volume_set_depth (ClutterPaintVolume *pv,
* clutter_paint_volume_get_depth:
* @pv: a #ClutterPaintVolume
*
* Retrieves the depth of the paint volume set using
* clutter_paint_volume_get_depth()
* Retrieves the depth of the volume's, axis aligned, bounding box.
*
* Return value: the depth
* In other words; this takes into account what actor's coordinate
* space @pv belongs too and conceptually fits an axis aligned box
* around the volume. It returns the size of that bounding box as
* measured along the z-axis.
*
* <note>If, for example, clutter_actor_get_transformed_paint_volume()
* is used to transform a 2D child actor that is 100px wide, 100px
* high and 0px deep into container coordinates then the depth might
* not simply be 0px if the child actor has a 3D rotation applied to
* it.
*
* Remember; after clutter_actor_get_transformed_paint_volume() is
* used then the transformed volume will be defined relative to the
* container actor and in container coordinates a 2D child actor
* can have a 3D bounding volume.</note>
*
* <note>There are no accuracy guarantees for the reported depth,
* except that it must always be >= to the true depth. This is
* because actors may report simple, loose fitting paint-volumes
* for efficiency.</note>
*
* Return value: the depth, in units of @pv's local coordinate system.
*
* Since: 1.6
*/
@ -410,10 +498,19 @@ gfloat
clutter_paint_volume_get_depth (const ClutterPaintVolume *pv)
{
g_return_val_if_fail (pv != NULL, 0.0);
g_return_val_if_fail (pv->is_axis_aligned, 0);
if (pv->is_empty)
return 0;
else if (!pv->is_axis_aligned)
{
ClutterPaintVolume tmp;
float depth;
_clutter_paint_volume_copy_static (pv, &tmp);
_clutter_paint_volume_axis_align (&tmp);
depth = tmp.vertices[4].z - tmp.vertices[0].z;
clutter_paint_volume_free (&tmp);
return depth;
}
else
return pv->vertices[4].z - pv->vertices[0].z;
}