/* 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 "Cursor.hh"
#include "Mesh.h"
#include <GL/gl.h>
#include <cmath>

#include <iostream>

using SharpConstruct::GInterface::Cursor;

Cursor::Cursor()
: list_( 0 )
{}

void Cursor::Update()
{
	static float prev_rad( 0 );

	if( !list_ )
		list_ = glGenLists( 1 );

	const float radius( Mesh::CurrentBrush().Radius() );
	if( prev_rad != radius )
	{	
		const unsigned SEGMENTS = 32;
		glNewList( list_, GL_COMPILE );
		{
			glColor4f( 1, 0, 0, 0.5 );
			glBegin( GL_LINE_LOOP );
			{
				for( unsigned i = 0; i < SEGMENTS; ++i )
				{
					const float angle( i * 2 * M_PI / SEGMENTS );
					glVertex2f( radius * cos( angle ),
						    radius * sin( angle ) );	
				}
			} glEnd();
		} glEndList();
	}
	prev_rad = radius;
}

void Cursor::Draw( unsigned x, unsigned y ) const
{
       	/*if( Contains( Mouse.Location() ) )
		glTranslatef( Mouse.Location().X(), Mouse.Location().Y(), 0 );
		else*/

	glTranslatef( x, y, 0 );
	glCallList( list_ );
}