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include perspective transfore in calculation of vertices

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This commit is contained in:
Tomas Frydrych 2007-05-31 19:14:28 +00:00
parent e725b0c7fa
commit e2cc64faa2
4 changed files with 226 additions and 35 deletions
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12
ChangeLog
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@ -26,6 +26,18 @@
* examples/test-entry.c: (on_key_release_cb), (main):
A basic test for ClutterEntry
2007-05-31 Tomas Frydrych <tf@openedhand.com>
* clutter/clutter-stage.c:
* clutter/clutter-private.h:
(_clutter_stage_get_perspective_matrix):
New function.
* clutter/clutter-actor.c:
(clutter_actor_get_tranformed_vertices):
(clutter_actor_get_tranformed_point):
Apply perspective matrix on the top of actor transform matrix.
2007-05-31 Tomas Frydrych <tf@openedhand.com>
* clutter/clutter-actor.c:

168
clutter/clutter-actor.c
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@ -454,32 +454,158 @@ mtx_transform (ClutterFixed *m,
}
static void
mtx_create (ClutterActorPrivate *priv, ClutterFixed *mtx)
mtx_mul (ClutterFixed * m1, const ClutterFixed * m2)
{
ClutterFixed n0, n1, n2, n3;
n0 =
CFX_MUL (M(m1,0,0),M(m2,0,0)) +
CFX_MUL (M(m1,0,1),M(m2,1,0)) +
CFX_MUL (M(m1,0,2),M(m2,2,0)) +
CFX_MUL (M(m1,0,3),M(m2,3,0));
n1 =
CFX_MUL (M(m1,0,0),M(m2,0,1)) +
CFX_MUL (M(m1,0,1),M(m2,1,1)) +
CFX_MUL (M(m1,0,2),M(m2,2,1)) +
CFX_MUL (M(m1,0,3),M(m2,3,1));
n2 =
CFX_MUL (M(m1,0,0),M(m2,0,2)) +
CFX_MUL (M(m1,0,1),M(m2,1,2)) +
CFX_MUL (M(m1,0,2),M(m2,2,2)) +
CFX_MUL (M(m1,0,3),M(m2,3,2));
n3 =
CFX_MUL (M(m1,0,0),M(m2,0,3)) +
CFX_MUL (M(m1,0,1),M(m2,1,3)) +
CFX_MUL (M(m1,0,2),M(m2,2,3)) +
CFX_MUL (M(m1,0,3),M(m2,3,3));
M(m1,0,0) = n0;
M(m1,0,1) = n1;
M(m1,0,2) = n2;
M(m1,0,3) = n3;
n0 =
CFX_MUL (M(m1,1,0),M(m2,0,0)) +
CFX_MUL (M(m1,1,1),M(m2,1,0)) +
CFX_MUL (M(m1,1,2),M(m2,2,0)) +
CFX_MUL (M(m1,1,3),M(m2,3,0));
n1 =
CFX_MUL (M(m1,1,0),M(m2,0,1)) +
CFX_MUL (M(m1,1,1),M(m2,1,1)) +
CFX_MUL (M(m1,1,2),M(m2,2,1)) +
CFX_MUL (M(m1,1,3),M(m2,3,1));
n2 =
CFX_MUL (M(m1,1,0),M(m2,0,2)) +
CFX_MUL (M(m1,1,1),M(m2,1,2)) +
CFX_MUL (M(m1,1,2),M(m2,2,2)) +
CFX_MUL (M(m1,1,3),M(m2,3,2));
n3 =
CFX_MUL (M(m1,1,0),M(m2,0,3)) +
CFX_MUL (M(m1,1,1),M(m2,1,3)) +
CFX_MUL (M(m1,1,2),M(m2,2,3)) +
CFX_MUL (M(m1,1,3),M(m2,3,3));
M(m1,1,0) = n0;
M(m1,1,1) = n1;
M(m1,1,2) = n2;
M(m1,1,3) = n3;
n0 =
CFX_MUL (M(m1,2,0),M(m2,0,0)) +
CFX_MUL (M(m1,2,1),M(m2,1,0)) +
CFX_MUL (M(m1,2,2),M(m2,2,0)) +
CFX_MUL (M(m1,2,3),M(m2,3,0));
n1 =
CFX_MUL (M(m1,2,0),M(m2,0,1)) +
CFX_MUL (M(m1,2,1),M(m2,1,1)) +
CFX_MUL (M(m1,2,2),M(m2,2,1)) +
CFX_MUL (M(m1,2,3),M(m2,3,1));
n2 =
CFX_MUL (M(m1,2,0),M(m2,0,2)) +
CFX_MUL (M(m1,2,1),M(m2,1,2)) +
CFX_MUL (M(m1,2,2),M(m2,2,2)) +
CFX_MUL (M(m1,2,3),M(m2,3,2));
n3 =
CFX_MUL (M(m1,2,0),M(m2,0,3)) +
CFX_MUL (M(m1,2,1),M(m2,1,3)) +
CFX_MUL (M(m1,2,2),M(m2,2,3)) +
CFX_MUL (M(m1,2,3),M(m2,3,3));
M(m1,2,0) = n0;
M(m1,2,1) = n1;
M(m1,2,2) = n2;
M(m1,2,3) = n3;
n0 =
CFX_MUL (M(m1,3,0),M(m2,0,0)) +
CFX_MUL (M(m1,3,1),M(m2,1,0)) +
CFX_MUL (M(m1,3,2),M(m2,2,0)) +
CFX_MUL (M(m1,3,3),M(m2,3,0));
n1 =
CFX_MUL (M(m1,3,0),M(m2,0,1)) +
CFX_MUL (M(m1,3,1),M(m2,1,1)) +
CFX_MUL (M(m1,3,2),M(m2,2,1)) +
CFX_MUL (M(m1,3,3),M(m2,3,1));
n2 =
CFX_MUL (M(m1,3,0),M(m2,0,2)) +
CFX_MUL (M(m1,3,1),M(m2,1,2)) +
CFX_MUL (M(m1,3,2),M(m2,2,2)) +
CFX_MUL (M(m1,3,3),M(m2,3,2));
n3 =
CFX_MUL (M(m1,3,0),M(m2,0,3)) +
CFX_MUL (M(m1,3,1),M(m2,1,3)) +
CFX_MUL (M(m1,3,2),M(m2,2,3)) +
CFX_MUL (M(m1,3,3),M(m2,3,3));
M(m1,3,0) = n0;
M(m1,3,1) = n1;
M(m1,3,2) = n2;
M(m1,3,3) = n3;
}
/* Creates a transform matrix by combining the actor transformations and the
* stage perspective
*/
static void
mtx_create (ClutterActorPrivate *priv,
ClutterFixed *mtx,
const ClutterFixed * mtx_p)
{
/* FIXME: need to apply perspective / viewport transforms */
mtx_identity (&mtx[0]);
mtx_identity (mtx);
/*
* All the rotation ops are relative to the actor, not the overall
* coordiante system; so first of all, we carry out a translation from
* 0,0 to where our actor is.
*/
mtx_translate (&mtx[0],
mtx_translate (mtx,
CLUTTER_UNITS_TO_FIXED (priv->coords.x1),
CLUTTER_UNITS_TO_FIXED (priv->coords.y1),
CLUTTER_INT_TO_FIXED (priv->z));
if (priv->rzang)
{
mtx_translate (&mtx[0],
mtx_translate (mtx,
CLUTTER_INT_TO_FIXED (priv->rzx),
CLUTTER_INT_TO_FIXED (priv->rzy),
0);
mtx_rotate_z (&mtx[0], priv->rzang);
mtx_rotate_z (mtx, priv->rzang);
mtx_translate (&mtx[0],
mtx_translate (mtx,
CLUTTER_INT_TO_FIXED (-priv->rzx),
CLUTTER_INT_TO_FIXED (-priv->rzy),
0);
@ -487,14 +613,14 @@ mtx_create (ClutterActorPrivate *priv, ClutterFixed *mtx)
if (priv->ryang)
{
mtx_translate (&mtx[0],
mtx_translate (mtx,
CLUTTER_INT_TO_FIXED (priv->ryx),
0,
CLUTTER_INT_TO_FIXED (priv->z + priv->ryz));
mtx_rotate_y (&mtx[0], priv->ryang);
mtx_rotate_y (mtx, priv->ryang);
mtx_translate (&mtx[0],
mtx_translate (mtx,
CLUTTER_INT_TO_FIXED (-priv->ryx),
0,
CLUTTER_INT_TO_FIXED (-(priv->z + priv->ryz)));
@ -502,26 +628,28 @@ mtx_create (ClutterActorPrivate *priv, ClutterFixed *mtx)
if (priv->rxang)
{
mtx_translate (&mtx[0],
mtx_translate (mtx,
0,
CLUTTER_INT_TO_FIXED (priv->rxy),
CLUTTER_INT_TO_FIXED (priv->z + priv->rxz));
mtx_rotate_x (&mtx[0], priv->rxang);
mtx_rotate_x (mtx, priv->rxang);
mtx_translate (&mtx[0],
mtx_translate (mtx,
0,
CLUTTER_INT_TO_FIXED (-priv->rxy),
CLUTTER_INT_TO_FIXED (-(priv->z - priv->rxz)));
}
if (priv->z)
mtx_translate (&mtx[0], 0, 0, CLUTTER_INT_TO_FIXED (priv->z));
mtx_translate (mtx, 0, 0, CLUTTER_INT_TO_FIXED (priv->z));
if (priv->scale_x != CFX_ONE || priv->scale_y != CFX_ONE)
{
mtx_scale (&mtx[0], priv->scale_x, priv->scale_y);
mtx_scale (mtx, priv->scale_x, priv->scale_y);
}
mtx_mul (mtx, mtx_p);
}
/**
@ -547,13 +675,16 @@ clutter_actor_get_transformed_point (ClutterActor *actor,
ClutterUnit *z_return)
{
ClutterFixed mtx[16];
const ClutterFixed *mtx_p;
ClutterActorPrivate *priv;
g_return_if_fail (CLUTTER_IS_ACTOR (actor));
priv = actor->priv;
mtx_create (priv, &mtx[0]);
mtx_p = _clutter_stage_get_perspective_matrix (CLUTTER_STAGE (clutter_stage_get_default()));
mtx_create (priv, &mtx[0], mtx_p);
*x_return = CLUTTER_UNITS_FROM_INT(x) - priv->coords.x1;
*y_return = CLUTTER_UNITS_FROM_INT(y) - priv->coords.y1;
@ -576,6 +707,7 @@ clutter_actor_get_transformed_vertices (ClutterActor * self,
ClutterVertices * verts)
{
ClutterFixed mtx[16];
const ClutterFixed *mtx_p;
ClutterFixed x, y, z;
ClutterActorPrivate *priv;
@ -587,7 +719,9 @@ clutter_actor_get_transformed_vertices (ClutterActor * self,
priv = self->priv;
mtx_create (priv, &mtx[0]);
mtx_p = _clutter_stage_get_perspective_matrix (CLUTTER_STAGE (clutter_stage_get_default()));
mtx_create (priv, &mtx[0], mtx_p);
#if 0
g_debug ("Matrix\n"

2
clutter/clutter-private.h
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@ -119,6 +119,8 @@ void _clutter_event_button_generate (ClutterBackend *backend,
void _clutter_feature_init (void);
const ClutterFixed * _clutter_stage_get_perspective_matrix (ClutterStage * stage);
/* Does this need to be private ? */
void clutter_do_event (ClutterEvent *event);

43
clutter/clutter-stage.c
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@ -61,6 +61,8 @@ struct _ClutterStagePrivate
guint is_fullscreen : 1;
guint is_offscreen : 1;
guint is_cursor_visible : 1;
ClutterFixed perspective_mtx[16];
};
enum
@ -484,6 +486,43 @@ clutter_stage_get_color (ClutterStage *stage,
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
* @stage: A #ClutterStage
@ -505,6 +544,8 @@ clutter_stage_set_perspectivex (ClutterStage *stage,
priv->perspective.z_near = perspective->z_near;
priv->perspective.z_far = perspective->z_far;
_clutter_stage_refresh_perspective_matrix (priv);
CLUTTER_SET_PRIVATE_FLAGS(stage, CLUTTER_ACTOR_SYNC_MATRICES);
}
@ -554,6 +595,8 @@ clutter_stage_set_perspective (ClutterStage *stage,
priv->perspective.z_near = CLUTTER_FLOAT_TO_FIXED(z_near);
priv->perspective.z_far = CLUTTER_FLOAT_TO_FIXED(z_far);
_clutter_stage_refresh_perspective_matrix (priv);
CLUTTER_SET_PRIVATE_FLAGS(stage, CLUTTER_ACTOR_SYNC_MATRICES);
}