/**
 * =========================================================================
 * File        : Patch.cpp
 * Project     : 0 A.D.
 * Description : A patch of terrain holding NxN MiniPatch tiles
 * =========================================================================
 */

#include "precompiled.h"

#include "Patch.h"
#include "Terrain.h"


///////////////////////////////////////////////////////////////////////////////
// CPatch constructor
CPatch::CPatch()
: m_Parent(0), m_bWillBeDrawn(false)
{
}

///////////////////////////////////////////////////////////////////////////////
// CPatch destructor
CPatch::~CPatch()
{
	
}

///////////////////////////////////////////////////////////////////////////////
// Initialize: setup patch data
void CPatch::Initialize(CTerrain* parent,u32 x,u32 z)
{
	delete m_RenderData;
	m_RenderData=0;

	m_Parent=parent;
	m_X=x;
	m_Z=z;

	// set parent of each patch	
	for (int j=0;j<PATCH_SIZE;j++)
	{
		for (int i=0;i<PATCH_SIZE;i++)
		{
			m_MiniPatches[j][i].m_Parent=this;
		}
	}

	InvalidateBounds();
}

///////////////////////////////////////////////////////////////////////////////
// CalcBounds: calculating the bounds of this patch
void CPatch::CalcBounds()
{
	m_Bounds.SetEmpty();

	for (int j=0;j<PATCH_SIZE+1;j++)
	{
		for (int i=0;i<PATCH_SIZE+1;i++)
		{
			CVector3D pos;
			m_Parent->CalcPosition(m_X*PATCH_SIZE+i,m_Z*PATCH_SIZE+j,pos);
			m_Bounds+=pos;
		}
	}
}