/*
 * Copyright (c) 2009 PerfDynamics. All rights reserved.
 * Copyright (c) 2009 SDR, Stefan Parvu. All rights reserved.

 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR: STEFAN PARVU AND CONTRIBUTORS
 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL STEFAN PARVU OR CONTRIBUTORS
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 * http://www.freebsd.org/copyright/freebsd-license.html
 *
 */

#include <math.h>

#include "barry3.h"

B3cart
GetXYFromBarry3(B3bary b3coords)
{
	B3cart cartesianB3;
	double x, y;
	double sum = b3coords.a + b3coords.b + b3coords.c;

	x = (b3Vertex[0][0] * b3coords.b) + 
            (b3Vertex[1][0] * b3coords.a) + 
            (b3Vertex[2][0] * b3coords.c);
	
        y = (b3Vertex[0][1] * b3coords.b) + 
            (b3Vertex[1][1] * b3coords.a) + 
            (b3Vertex[2][1] * b3coords.c);
	
        cartesianB3.x = x/sum;
	cartesianB3.y = y/sum;

	return(cartesianB3);
}

void SetBarry3Vertices()
{
	b3Vertex[1][0] = 0;
	b3Vertex[1][1] = 2.6;
	b3Vertex[0][0] = 2.6;
	b3Vertex[0][1] = -1.9;
	b3Vertex[2][0] = -2.6;
	b3Vertex[2][1] = -1.9;
}