SG_Spatial.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.
 *
 * 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());
}