/* -*- C++ -*-
 * Copyright ©2004 Hugo Mills <hugo@carfax.org.uk>
 *
 * This software is distributed under the terms of the GNU GPL v3
 * For more information on the GPL, see the file COPYING or 
 * visit http://www.gnu.org/
 *
 * This software is distributed without warranty
 */

#include "xfmap_flat.h"

extern "C" PluginInfo* getmodules(int i)
{
	if(i==0)
	{
		PluginInfo_Map* pi = new PluginInfo_Map();

		pi->name = "Planar Orthographic";
		pi->author = "Hugo Mills";
		pi->copyright = "©2005 Hugo Mills";
		pi->version = 0x10000;
		pi->parser = XfMap_Flat::parser;
		return pi;
	}
	else
		return NULL;
}

XfMap* XfMap_Flat::parser(
	ConfigLexer* lex,
	const std::string& type,
	const std::string& subtype
	)
{
	if(type == "planar" && subtype == "orthographic")
		return new XfMap_Flat();
	else
		return NULL;
}

bool XfMap_Flat::f(dvec2& result, const dvec3& pos) const
{
	if(pos[2] < 0)
		return false;

	result[0] = pos[0];
	result[1] = pos[1];

	return true;
}

bool XfMap_Flat::g(dvec3& result, const dvec2& pos) const
{
	double rad2 = pos[0]*pos[0] + pos[1]*pos[1];
	if(rad2 > 1.0) 
		return false;

	result[0] = pos[0];
	result[1] = pos[1];
	result[2] = sqrt(1.0-rad2);

	return true;
}