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Initicalize stage perspective matrix for defaults

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Tomas Frydrych 2007-06-01 11:30:52 +00:00
parent e1a8434d64
commit 4d0cfed2dc
2 changed files with 46 additions and 37 deletions
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7
ChangeLog
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@ -1,3 +1,10 @@
2007-06-01 Tomas Frydrych <tf@openedhand.com>
* clutter/clutter-stage.c:
(clutter_stage_init):
Call _clutter_stage_refresh_perspective_matrix to initialize the
matrix for default values.
2007-06-01 Tomas Frydrych <tf@openedhand.com> 2007-06-01 Tomas Frydrych <tf@openedhand.com>
* clutter/clutter-fixed.h: * clutter/clutter-fixed.h:

76
clutter/clutter-stage.c
View File

@ -384,6 +384,43 @@ clutter_stage_class_init (ClutterStageClass *klass)
g_type_class_add_private (gobject_class, sizeof (ClutterStagePrivate)); g_type_class_add_private (gobject_class, sizeof (ClutterStagePrivate));
} }
static void
_clutter_stage_refresh_perspective_matrix (ClutterStagePrivate * priv)
{
ClutterFixed xmax, ymax;
ClutterFixed x, y, c, d;
memset (&priv->perspective_mtx[0], 0, sizeof (priv->perspective_mtx));
ymax = clutter_qmulx (priv->perspective.z_near,
clutter_tani (priv->perspective.fovy >> 1));
xmax = clutter_qmulx (ymax, priv->perspective.aspect);
x = CFX_DIV (priv->perspective.z_near, xmax);
y = CFX_DIV (priv->perspective.z_near, ymax);
c = CFX_DIV (-(priv->perspective.z_far + priv->perspective.z_near),
( priv->perspective.z_far - priv->perspective.z_near));
d = CFX_DIV (-(clutter_qmulx (2 * priv->perspective.z_far,
priv->perspective.z_near)),
(priv->perspective.z_far - priv->perspective.z_near));
#define M(row,col) priv->perspective_mtx[col*4+row]
M(0,0) = x;
M(1,1) = y;
M(2,2) = c;
M(2,3) = d;
M(3,2) = -CFX_ONE;
#undef M
}
const ClutterFixed *
_clutter_stage_get_perspective_matrix (ClutterStage * stage)
{
return &stage->priv->perspective_mtx[0];
}
static void static void
clutter_stage_init (ClutterStage *self) clutter_stage_init (ClutterStage *self)
{ {
@ -407,6 +444,8 @@ clutter_stage_init (ClutterStage *self)
priv->perspective.aspect = CFX_ONE; priv->perspective.aspect = CFX_ONE;
priv->perspective.z_near = CLUTTER_FLOAT_TO_FIXED (0.1); priv->perspective.z_near = CLUTTER_FLOAT_TO_FIXED (0.1);
priv->perspective.z_far = CLUTTER_FLOAT_TO_FIXED (100.0); priv->perspective.z_far = CLUTTER_FLOAT_TO_FIXED (100.0);
_clutter_stage_refresh_perspective_matrix (priv);
clutter_actor_set_size (CLUTTER_ACTOR (self), 640, 480); clutter_actor_set_size (CLUTTER_ACTOR (self), 640, 480);
} }
@ -486,43 +525,6 @@ clutter_stage_get_color (ClutterStage *stage,
color->alpha = priv->color.alpha; color->alpha = priv->color.alpha;
} }
static void
_clutter_stage_refresh_perspective_matrix (ClutterStagePrivate * priv)
{
ClutterFixed xmax, ymax;
ClutterFixed x, y, c, d;
memset (&priv->perspective_mtx[0], 0, sizeof (priv->perspective_mtx));
ymax = clutter_qmulx (priv->perspective.z_near,
clutter_tani (priv->perspective.fovy >> 1));
xmax = clutter_qmulx (ymax, priv->perspective.aspect);
x = CFX_DIV (priv->perspective.z_near, xmax);
y = CFX_DIV (priv->perspective.z_near, ymax);
c = CFX_DIV (-(priv->perspective.z_far + priv->perspective.z_near),
( priv->perspective.z_far - priv->perspective.z_near));
d = CFX_DIV (-(clutter_qmulx (2 * priv->perspective.z_far,
priv->perspective.z_near)),
(priv->perspective.z_far - priv->perspective.z_near));
#define M(row,col) priv->perspective_mtx[col*4+row]
M(0,0) = x;
M(1,1) = y;
M(2,2) = c;
M(2,3) = d;
M(3,2) = -CFX_ONE;
#undef M
}
const ClutterFixed *
_clutter_stage_get_perspective_matrix (ClutterStage * stage)
{
return &stage->priv->perspective_mtx[0];
}
/** /**
* clutter_stage_set_perspectivex * clutter_stage_set_perspectivex
* @stage: A #ClutterStage * @stage: A #ClutterStage