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/**************************************************************************/
/* Copyright 2012 Tim Day */
/* */
/* This file is part of Evolvotron */
/* */
/* Evolvotron 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 3 of the License, or */
/* (at your option) any later version. */
/* */
/* Evolvotron 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 Evolvotron. If not, see <http://www.gnu.org/licenses/>. */
/**************************************************************************/
/*! \file
\brief Implementation for class TransformFactory.
*/
#include "libevolvotron_precompiled.h"
#include "transform_factory.h"
#include "random.h"
#include "transform.h"
const Transform TransformFactoryRandomWarpXY::operator()(Random01& r01) const
{
// Gives a scale between 0.5 and 2, average 1.
const real r=pow(2.0,2.0*r01()-1.0);
// Random rotation
const real a=(2.0*M_PI)*r01();
const XYZ basis_x( r*cos(a), r*sin(a),0.0);
const XYZ basis_y(-r*sin(a), r*cos(a),0.0);
const XYZ basis_z(0.0,0.0,1.0);
// Random translation
const real tx=2.0*r01()-1.0;
const real ty=2.0*r01()-1.0;
const XYZ translate(tx,ty,0.0);
return Transform(translate,basis_x,basis_y,basis_z);
}
const Transform TransformFactoryRandomScaleXY::operator()(Random01& rng) const
{
const XYZ translate(0.0,0.0,0.0);
const real p=rng();
const real s=pow(2.0,_lopow2+p*(_hipow2-_lopow2));
const XYZ basis_x( s,0.0,0.0);
const XYZ basis_y(0.0, s,0.0);
const XYZ basis_z(0.0,0.0,1.0);
return Transform(translate,basis_x,basis_y,basis_z);
}
const Transform TransformFactoryRandomRotateZ::operator()(Random01& r01) const
{
// Random rotation
const real a=(2.0*M_PI)*r01();
const real ca=cos(a);
const real sa=sin(a);
const XYZ basis_x( ca, sa,0.0);
const XYZ basis_y( -sa, ca,0.0);
const XYZ basis_z(0.0,0.0,1.0);
const XYZ translate(0.0,0.0,0.0);
return Transform(translate,basis_x,basis_y,basis_z);
}
const Transform TransformFactoryRandomTranslateXYZ::operator()(Random01& r01) const
{
const XYZ translate(_origin+RandomXYZInBox(r01,_range));
const XYZ basis_x(1.0,0.0,0.0);
const XYZ basis_y(0.0,1.0,0.0);
const XYZ basis_z(1.0,0.0,1.0);
return Transform(translate,basis_x,basis_y,basis_z);
}
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