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/*************************************************************************
* Copyright (C) 2009-2014 Tavian Barnes <tavianator@tavianator.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library is free software; you can redistribute it and/ *
* or modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Library is distributed in the hope that it will be *
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty *
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
/**
* @file
* Objects.
*/
#include "dimension-internal.h"
#include <stdlib.h>
static void
dmnsn_default_object_free_fn(dmnsn_object *object)
{
dmnsn_free(object);
}
/* Allocate a dummy object */
dmnsn_object *
dmnsn_new_object(void)
{
dmnsn_object *object = DMNSN_MALLOC(dmnsn_object);
dmnsn_init_object(object);
return object;
}
/* Initialize a dmnsn_object field */
void
dmnsn_init_object(dmnsn_object *object)
{
object->texture = NULL;
object->interior = NULL;
object->trans = dmnsn_identity_matrix();
object->intrinsic_trans = dmnsn_identity_matrix();
object->children = dmnsn_new_array(sizeof(dmnsn_object *));
object->split_children = false;
object->intersection_fn = NULL;
object->inside_fn = NULL;
object->initialize_fn = NULL;
object->free_fn = dmnsn_default_object_free_fn;
object->initialized = false;
DMNSN_REFCOUNT_INIT(object);
}
/* Free a dmnsn_object */
void
dmnsn_delete_object(dmnsn_object *object)
{
if (DMNSN_DECREF(object)) {
DMNSN_ARRAY_FOREACH (dmnsn_object **, child, object->children) {
dmnsn_delete_object(*child);
}
dmnsn_delete_array(object->children);
dmnsn_delete_texture(object->texture);
object->free_fn(object);
}
}
/** Recursively initialize objects. */
static void
dmnsn_object_initialize_recursive(dmnsn_object *object,
dmnsn_matrix pigment_trans)
{
dmnsn_assert(!object->initialized, "Object double-initialized.");
object->initialized = true;
/* Initialize the texture */
if (!object->texture->initialized) {
dmnsn_texture_initialize(object->texture);
}
/* Precalculate object values */
object->pigment_trans = pigment_trans;
object->trans = dmnsn_matrix_mul(object->trans, object->intrinsic_trans);
/* Initialize the object's children */
DMNSN_ARRAY_FOREACH (dmnsn_object **, child, object->children) {
(*child)->trans = dmnsn_matrix_mul(object->trans, (*child)->trans);
dmnsn_matrix child_pigment_trans;
if ((*child)->texture == NULL || (*child)->texture->pigment == NULL) {
/* Don't transform cascaded pigments with the child object */
child_pigment_trans = pigment_trans;
} else {
child_pigment_trans = dmnsn_matrix_inverse((*child)->trans);
}
dmnsn_texture_cascade(object->texture, &(*child)->texture);
dmnsn_interior_cascade(object->interior, &(*child)->interior);
dmnsn_object_initialize_recursive(*child, child_pigment_trans);
}
/* Initialization callback */
if (object->initialize_fn) {
object->initialize_fn(object);
}
/* Precalculate more object values */
object->bounding_box
= dmnsn_transform_bounding_box(object->trans, object->bounding_box);
object->trans_inv = dmnsn_matrix_inverse(object->trans);
}
/* Precompute object properties */
void
dmnsn_object_initialize(dmnsn_object *object)
{
dmnsn_matrix pigment_trans = dmnsn_matrix_inverse(object->trans);
dmnsn_object_initialize_recursive(object, pigment_trans);
}
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