SG_Spatial.cpp

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/*
 * $Id: SG_Spatial.cpp 35175 2011-02-25 13:39:04Z jesterking $
 *
 * ***** 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.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

#include "SG_Node.h"
#include "SG_Spatial.h"
#include "SG_Controller.h"
#include "SG_ParentRelation.h"

SG_Spatial::
SG_Spatial(
        void* clientobj,
        void* clientinfo,
        SG_Callbacks& callbacks
): 

        SG_IObject(clientobj,clientinfo,callbacks),
        m_localPosition(0.0,0.0,0.0),
        m_localRotation(1.0,0.0,0.0,0.0,1.0,0.0,0.0,0.0,1.0),
        m_localScaling(1.f,1.f,1.f),
        
        m_worldPosition(0.0,0.0,0.0),
        m_worldRotation(1.0,0.0,0.0,0.0,1.0,0.0,0.0,0.0,1.0),
        m_worldScaling(1.f,1.f,1.f),

        m_parent_relation (NULL),
        
        m_bbox(MT_Point3(-1.0, -1.0, -1.0), MT_Point3(1.0, 1.0, 1.0)),
        m_radius(1.0),
        m_modified(false),
        m_ogldirty(false)
{
}

SG_Spatial::
SG_Spatial(
        const SG_Spatial& other
) : 
        SG_IObject(other),
        m_localPosition(other.m_localPosition),
        m_localRotation(other.m_localRotation),
        m_localScaling(other.m_localScaling),
        
        m_worldPosition(other.m_worldPosition),
        m_worldRotation(other.m_worldRotation),
        m_worldScaling(other.m_worldScaling),
        
        m_parent_relation(NULL),
        
        m_bbox(other.m_bbox),
        m_radius(other.m_radius),
        m_modified(false),
        m_ogldirty(false)
{
        // duplicate the parent relation for this object
        m_parent_relation = other.m_parent_relation->NewCopy();
}
        
SG_Spatial::
~SG_Spatial()
{
        delete (m_parent_relation);
}

        void
SG_Spatial::
SetParentRelation(
        SG_ParentRelation *relation
){
        delete (m_parent_relation);
        m_parent_relation = relation;
        SetModified();
}


        bool 
SG_Spatial::
UpdateSpatialData(
        const SG_Spatial *parent,
        double time,
        bool& parentUpdated
){

    bool bComputesWorldTransform = false;

        // update spatial controllers
        
        SGControllerList::iterator cit = GetSGControllerList().begin();
        SGControllerList::const_iterator c_end = GetSGControllerList().end();

        for (;cit!=c_end;++cit)
        {
                if ((*cit)->Update(time))
                        bComputesWorldTransform = true;
        }

        // If none of the objects updated our values then we ask the
        // parent_relation object owned by this class to update 
        // our world coordinates.

        if (!bComputesWorldTransform)
                bComputesWorldTransform = ComputeWorldTransforms(parent, parentUpdated);

        return bComputesWorldTransform;
}

        void 
SG_Spatial::
RelativeTranslate(
        const MT_Vector3& trans,
        const SG_Spatial *parent,
        bool local
){
        if (local) {
                        m_localPosition += m_localRotation * trans;
        } else {
                if (parent) {
                        m_localPosition += trans * parent->GetWorldOrientation();
                } else {
                        m_localPosition += trans;
                }
        }
        SetModified();
}       
        

        void 
SG_Spatial::
RelativeRotate(
        const MT_Matrix3x3& rot,
        bool local
){
        m_localRotation = m_localRotation * (
        local ? 
                rot 
        :
        (GetWorldOrientation().inverse() * rot * GetWorldOrientation()));
        SetModified();
}



MT_Transform SG_Spatial::GetWorldTransform() const
{
        return MT_Transform(m_worldPosition, 
                m_worldRotation.scaled(
                m_worldScaling[0], m_worldScaling[1], m_worldScaling[2]));
}

bool SG_Spatial::inside(const MT_Point3 &point) const
{
        MT_Scalar radius = m_worldScaling[m_worldScaling.closestAxis()]*m_radius;
        return (m_worldPosition.distance2(point) <= radius*radius) ?
                m_bbox.transform(GetWorldTransform()).inside(point) :
                false;
}

void SG_Spatial::getBBox(MT_Point3 *box) const
{
        m_bbox.get(box, GetWorldTransform());
}

void SG_Spatial::getAABBox(MT_Point3 *box) const
{
        m_bbox.getaa(box, GetWorldTransform());
}