kicad/3d-viewer/3d_rendering/3d_render_raytracing/shapes3D/cplane.cpp

133 lines
3.8 KiB
C++

/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2015-2016 Mario Luzeiro <mrluzeiro@ua.pt>
* Copyright (C) 1992-2016 KiCad Developers, see AUTHORS.txt for contributors.
*
* 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, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* @file cplane.cpp
* @brief
*/
#include "cplane.h"
CXYPLANE::CXYPLANE( const CBBOX &aBBox ) : COBJECT( OBJ3D_XYPLANE )
{
m_centerPoint = aBBox.GetCenter();
m_centroid = m_centerPoint;
m_bbox.Reset();
m_bbox.Set( aBBox );
m_xsize = aBBox.GetExtent().x;
m_ysize = aBBox.GetExtent().y;
m_xsize_inv2 = 1.0f / (2.0f * m_xsize);
m_ysize_inv2 = 1.0f / (2.0f * m_ysize);
}
CXYPLANE::CXYPLANE( SFVEC3F aCenterPoint,
float aXSize,
float aYSize ) : COBJECT( OBJ3D_XYPLANE )
{
m_centerPoint = aCenterPoint;
m_xsize = aXSize;
m_ysize = aYSize;
m_xsize_inv2 = 1.0f / (2.0f * aXSize);
m_ysize_inv2 = 1.0f / (2.0f * aYSize);
m_bbox.Set( SFVEC3F( aCenterPoint.x - aXSize / 2.0f,
aCenterPoint.y - aYSize / 2.0f,
aCenterPoint.z ),
SFVEC3F( aCenterPoint.x + aXSize / 2.0f,
aCenterPoint.y + aYSize / 2.0f,
aCenterPoint.z ) );
m_centroid = aCenterPoint;
}
bool CXYPLANE::Intersect( const RAY &aRay, HITINFO &aHitInfo ) const
{
const float t = (m_centerPoint.z - aRay.m_Origin.z) * aRay.m_InvDir.z;
if( ( t < FLT_EPSILON ) ||
( t >= aHitInfo.m_tHit ) )
return false;
const float vSU = t * aRay.m_Dir.x + aRay.m_Origin.x - m_centerPoint.x;
if( (vSU < -m_xsize) || (vSU > m_xsize) )
return false;
const float vSV = t * aRay.m_Dir.y + aRay.m_Origin.y - m_centerPoint.y;
if( (vSV < -m_ysize) || (vSV > m_ysize) )
return false;
aHitInfo.m_tHit = t;
aHitInfo.m_HitPoint = aRay.at( t );
aHitInfo.pHitObject = this;
if( aRay.m_dirIsNeg[2] )
aHitInfo.m_HitNormal = SFVEC3F( 0.0f, 0.0f, 1.0f );
else
aHitInfo.m_HitNormal = SFVEC3F( 0.0f, 0.0f,-1.0f );
m_material->PerturbeNormal( aHitInfo.m_HitNormal, aRay, aHitInfo );
return true;
}
bool CXYPLANE::IntersectP(const RAY &aRay , float aMaxDistance ) const
{
const float t = (m_centerPoint.z - aRay.m_Origin.z) * aRay.m_InvDir.z;
if( ( t < FLT_EPSILON ) ||
( t >= aMaxDistance ) )
return false;
const float vSU = t * aRay.m_Dir.x + aRay.m_Origin.x - m_centerPoint.x;
if( (vSU < -m_xsize) || (vSU > m_xsize) )
return false;
const float vSV = t * aRay.m_Dir.y + aRay.m_Origin.y - m_centerPoint.y;
if( (vSV < -m_ysize) || (vSV > m_ysize) )
return false;
return true;
}
bool CXYPLANE::Intersects( const CBBOX &aBBox ) const
{
return m_bbox.Intersects( aBBox );
}
SFVEC3F CXYPLANE::GetDiffuseColor( const HITINFO &aHitInfo ) const
{
(void)aHitInfo; // unused
return m_diffusecolor;
}