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/* Copyright (C) 2010 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/>.
*/
/*
* A patch of terrain holding NxN MiniPatch tiles
*/
#include "precompiled.h"
#include "Patch.h"
#include "Terrain.h"
///////////////////////////////////////////////////////////////////////////////
// CPatch constructor
CPatch::CPatch()
: m_Parent(0)
{
}
///////////////////////////////////////////////////////////////////////////////
// CPatch destructor
CPatch::~CPatch()
{
}
///////////////////////////////////////////////////////////////////////////////
// Initialize: setup patch data
void CPatch::Initialize(CTerrain* parent,ssize_t x,ssize_t z)
{
delete m_RenderData;
m_RenderData=0;
m_Parent=parent;
m_X=x;
m_Z=z;
InvalidateBounds();
}
///////////////////////////////////////////////////////////////////////////////
// CalcBounds: calculating the bounds of this patch
void CPatch::CalcBounds()
{
m_WorldBounds.SetEmpty();
for (ssize_t j=0;j<PATCH_SIZE+1;j++)
{
for (ssize_t i=0;i<PATCH_SIZE+1;i++)
{
CVector3D pos;
m_Parent->CalcPosition(m_X*PATCH_SIZE+i,m_Z*PATCH_SIZE+j,pos);
m_WorldBounds+=pos;
}
}
// If this a side patch, the sides go down to height 0, so add them
// into the bounds
if (GetSideFlags())
m_WorldBounds[0].Y = std::min(m_WorldBounds[0].Y, 0.f);
}
int CPatch::GetSideFlags()
{
int flags = 0;
if (m_X == 0)
flags |= CPATCH_SIDE_NEGX;
if (m_Z == 0)
flags |= CPATCH_SIDE_NEGZ;
if (m_X == m_Parent->GetPatchesPerSide()-1)
flags |= CPATCH_SIDE_POSX;
if (m_Z == m_Parent->GetPatchesPerSide()-1)
flags |= CPATCH_SIDE_POSZ;
return flags;
}
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