// Shave and a Haircut
// (c) 2019 Epic Games
// US Patent 6720962

#include "ShavePerVertTexInfo.h"
#include "shaveTextureStore.h"


const int			ShavePerVertTexInfo::mVertParams[] = { 8, 21, 40 };
const unsigned int	ShavePerVertTexInfo::mNumVertParams = sizeof(mVertParams) / sizeof(int);


ShavePerVertTexInfo::ShavePerVertTexInfo()
:	mNumVertices(0)
,	mTextureValues(0)
{
}


ShavePerVertTexInfo::~ShavePerVertTexInfo()
{
	clear(true);
}


void ShavePerVertTexInfo::clear(bool all)
{
	//	If we have any existing texture data, delete it.
	if (mTextureValues)
	{
		for (unsigned int param = 0; param < mNumVertParams; ++param)
		{
			if (mTextureValues[param])
			{
				delete [] mTextureValues[param];
				mTextureValues[param] = 0;
			}
		}

		if (all)
		{
			delete [] mTextureValues;
			mTextureValues = 0;
		}
	}

	mNumVertices = 0;
}


void ShavePerVertTexInfo::init(unsigned int numVertices)
{
	clear(false);
	mNumVertices = numVertices;
}


bool ShavePerVertTexInfo::setValue(
	unsigned int	paramIdx,
	unsigned int	vertIdx,
	float			value
)
{
	if ((paramIdx >= mNumVertParams) ||	(vertIdx > mNumVertices)) return false;

	if (mTextureValues == 0)
	{
		mTextureValues = new float*[mNumVertParams];

		for (unsigned int i = 0; i < mNumVertParams; ++i)
			mTextureValues[i] = 0;
	}

	if (mTextureValues[paramIdx] == 0)
		mTextureValues[paramIdx] = new float[mNumVertices];

	mTextureValues[paramIdx][vertIdx] = value;

	return true;
}