collada_utils.cpp

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/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * Contributor(s): Chingiz Dyussenov, Arystanbek Dyussenov, Nathan Letwory.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/* COLLADABU_ASSERT, may be able to remove later */
#include "COLLADABUPlatform.h"

#include "COLLADAFWGeometry.h"
#include "COLLADAFWMeshPrimitive.h"
#include "COLLADAFWMeshVertexData.h"

#include "DNA_customdata_types.h"
#include "DNA_object_types.h"

#include "BLI_math.h"

#include "BKE_context.h"
#include "BKE_customdata.h"
#include "BKE_depsgraph.h"
#include "BKE_object.h"

#include "WM_api.h" // XXX hrm, see if we can do without this
#include "WM_types.h"

float bc_get_float_value(const COLLADAFW::FloatOrDoubleArray& array, unsigned int index)
{
    if (index >= array.getValuesCount())
        return 0.0f;

    if (array.getType() == COLLADAFW::MeshVertexData::DATA_TYPE_FLOAT)
        return array.getFloatValues()->getData()[index];
    else 
        return array.getDoubleValues()->getData()[index];
}

// copied from /editors/object/object_relations.c
int bc_test_parent_loop(Object *par, Object *ob)
{
    /* test if 'ob' is a parent somewhere in par's parents */
    
    if(par == NULL) return 0;
    if(ob == par) return 1;
    
    return bc_test_parent_loop(par->parent, ob);
}

// a shortened version of parent_set_exec()
// if is_parent_space is true then ob->obmat will be multiplied by par->obmat before parenting
int bc_set_parent(Object *ob, Object *par, bContext *C, bool is_parent_space)
{
    Object workob;
    Main *bmain = CTX_data_main(C);
    Scene *sce = CTX_data_scene(C);
    
    if (!par || bc_test_parent_loop(par, ob))
        return false;

    ob->parent = par;
    ob->partype = PAROBJECT;

    ob->parsubstr[0] = 0;

    if (is_parent_space) {
        float mat[4][4];
        // calc par->obmat
        where_is_object(sce, par);

        // move child obmat into world space
        mult_m4_m4m4(mat, par->obmat, ob->obmat);
        copy_m4_m4(ob->obmat, mat);
    }
    
    // apply child obmat (i.e. decompose it into rot/loc/size)
    object_apply_mat4(ob, ob->obmat, 0, 0);

    // compute parentinv
    what_does_parent(sce, ob, &workob);
    invert_m4_m4(ob->parentinv, workob.obmat);

    ob->recalc |= OB_RECALC_OB | OB_RECALC_DATA;
    par->recalc |= OB_RECALC_OB;

    DAG_scene_sort(bmain, sce);
    DAG_ids_flush_update(bmain, 0);
    WM_event_add_notifier(C, NC_OBJECT|ND_TRANSFORM, NULL);

    return true;
}