/* Copyright 2005 Nicholas Bishop
 * 
 * This file is part of SharpConstruct.
 *
 * SharpConstruct 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.
 *
 * SharpConstruct 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 SharpConstruct; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */

#include "Brush.h"
#include "GrabBrush.hh"
#include "Mesh.h"

#include <iostream>

using namespace SharpConstruct;

GrabBrush::grab_data_ GrabBrush::data_[ 8 ];
float GrabBrush::delta_x_ = 0;
float GrabBrush::delta_y_ = 0;

GrabBrush::GrabBrush( SculptStart, Mesh& mesh )
: mesh_( mesh )
{
	for( unsigned i = 0; i < 8; ++i )
		data_[ i ].Active.clear();
	delta_x_ = delta_y_ = 0;
}
GrabBrush::GrabBrush( SculptContinue, Mesh& mesh )
: mesh_( mesh )
{}

void GrabBrush::operator()( SculptStart, EditData e )
{
	grab_data_& data( data_[ e.SIndex ] );

	data.Drag.Zero();

	mesh_.FindActiveVertices( data.Active, e );

	//for( unsigned i = 0; i < data.Active.size(); i++ )
	//	data.Active[ i ].SetDistance( mesh_.CurrentBrush().AlphaStrength( mesh_.Relative2DLocation( e, mesh_.VertexLocations()[ data.Active[ i ].Index() ],
	//																data.Active[ i ].Distance() ) ) );
}
void GrabBrush::operator()( SculptContinue, EditData e )
{
	grab_data_& data( data_[ e.SIndex ] );

	data.Drag.Zero();
	data.Drag += e.Left * delta_x_;
	data.Drag += e.Up * delta_y_;
	
	for( unsigned i = 0; i < data.Active.size(); ++i )
		mesh_.VertexLocations()[ data.Active[ i ].Index() ] += data.Drag * data.Active[ i ].Strength();
}

void GrabBrush::Postwork( SculptStart )
{}
void GrabBrush::Postwork( SculptContinue )
{
	mesh_.RecalculateDamaged();
	mesh_.RecalculateModifiedNormals();
}

void GrabBrush::SetDelta( float x, float y )
{
	delta_x_ = x;
	delta_y_ = y;
}