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/* Copyright (C) 2011 Wildfire Games.
* This file is part of 0 A.D.
*
* 0 A.D. 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.
*
* 0 A.D. 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 0 A.D. If not, see <http://www.gnu.org/licenses/>.
*/
#include "precompiled.h"
#include "ModelAbstract.h"
#include "ps/CLogger.h"
const CBoundingBoxOriented& CModelAbstract::GetSelectionBox()
{
if (!m_SelectionBoxValid)
{
CalcSelectionBox();
m_SelectionBoxValid = true;
}
return m_SelectionBox;
}
void CModelAbstract::CalcSelectionBox()
{
if (m_CustomSelectionShape)
{
// custom shape
switch(m_CustomSelectionShape->m_Type)
{
case CustomSelectionShape::BOX:
{
// create object-space bounds according to the information in the descriptor, and transform them to world-space.
// the box is centered on the X and Z axes, but extends from 0 to its height on the Y axis.
const float width = m_CustomSelectionShape->m_Size0;
const float depth = m_CustomSelectionShape->m_Size1;
const float height = m_CustomSelectionShape->m_Height;
CBoundingBoxAligned bounds;
bounds += CVector3D(-width/2.f, 0, -depth/2.f);
bounds += CVector3D( width/2.f, height, depth/2.f);
bounds.Transform(GetTransform(), m_SelectionBox);
}
break;
case CustomSelectionShape::CYLINDER:
{
// TODO: unimplemented
m_SelectionBox.SetEmpty();
LOGWARNING("[ModelAbstract] TODO: Cylinder selection boxes are not yet implemented. Use BOX or BOUNDS selection shapes instead.");
}
break;
default:
{
m_SelectionBox.SetEmpty();
//LOGWARNING("[ModelAbstract] Unrecognized selection shape type: %ld", m_CustomSelectionShape->m_Type);
debug_warn("[ModelAbstract] Unrecognized selection shape type");
}
break;
}
}
else
{
// standard method
// Get the object-space bounds that should be used to construct this model (and its children)'s selection box
CBoundingBoxAligned objBounds = GetObjectSelectionBoundsRec();
if (objBounds.IsEmpty())
{
m_SelectionBox.SetEmpty(); // model does not wish to participate in selection
return;
}
// Prevent the bounding box from extending through the terrain; clip the lower plane at Y=0 in object space.
if (objBounds[1].Y > 0.f) // should always be the case, unless the models are defined really weirdly
objBounds[0].Y = std::max(0.f, objBounds[0].Y);
// transform object-space axis-aligned bounds to world-space arbitrary-aligned box
objBounds.Transform(GetTransform(), m_SelectionBox);
}
}
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