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#include "foundation/PxIO.h"
#include "GuHeightField.h"
#include "GuSerialize.h"

using namespace physx;
using namespace Gu;

namespace physx
{

bool saveHeightField(const HeightField& hf, PxOutputStream& stream, bool endian)
{
	// write header
	if(!writeHeader('H', 'F', 'H', 'F', PX_HEIGHTFIELD_VERSION, endian, stream))
		return false;

	const Gu::HeightFieldData& hfData = hf.getData();

	// write mData members
	writeDword(hfData.rows, endian, stream);
	writeDword(hfData.columns, endian, stream);
	writeFloat(hfData.rowLimit, endian, stream);
	writeFloat(hfData.colLimit, endian, stream);
	writeFloat(hfData.nbColumns, endian, stream);
	writeFloat(0.0f, endian, stream);	// thickness
	writeFloat(hfData.convexEdgeThreshold, endian, stream);
	writeWord(hfData.flags, endian, stream);
	writeDword(hfData.format, endian, stream);

	writeFloat(hfData.mAABB.getMin(0), endian, stream);
	writeFloat(hfData.mAABB.getMin(1), endian, stream);
	writeFloat(hfData.mAABB.getMin(2), endian, stream);
	writeFloat(hfData.mAABB.getMax(0), endian, stream);
	writeFloat(hfData.mAABB.getMax(1), endian, stream);
	writeFloat(hfData.mAABB.getMax(2), endian, stream);

	// write this-> members
	writeDword(hf.mSampleStride, endian, stream);
	writeDword(hf.mNbSamples, endian, stream);
	writeFloat(hf.mMinHeight, endian, stream);
	writeFloat(hf.mMaxHeight, endian, stream);

	// write samples
	for(PxU32 i = 0; i < hf.mNbSamples; i++)
	{
		const PxHeightFieldSample& s = hfData.samples[i];
		writeWord(PxU16(s.height), endian, stream);
		stream.write(&s.materialIndex0, sizeof(s.materialIndex0));
		stream.write(&s.materialIndex1, sizeof(s.materialIndex1));
	}

	return true;
}

}
