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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 Interfaces and implementation for specific Function classes.
Use this for functions under development, but they should really be split
out into separate files eventually.
*/
#ifndef _functions_misc_h_
#define _functions_misc_h_
#include "common.h"
#include "function_boilerplate.h"
//------------------------------------------------------------------------------------------
//! Multiply x and y by z.
FUNCTION_BEGIN(FunctionCone,0,0,false,0)
//! Evaluate function.
virtual const XYZ evaluate(const XYZ& p) const
{
return XYZ(p.x()*p.z(),p.y()*p.z(),p.z());
}
FUNCTION_END(FunctionCone)
//------------------------------------------------------------------------------------------
//! Multiply x and y by exp(z).
FUNCTION_BEGIN(FunctionExpCone,0,0,false,0)
//! Evaluate function.
virtual const XYZ evaluate(const XYZ& p) const
{
const real k=exp(p.z());
return XYZ(p.x()*k,p.y()*k,p.z());
}
FUNCTION_END(FunctionExpCone)
//------------------------------------------------------------------------------------------
//! Separate influence of z co-ordinate.
/*! Interesting as a top level node for animations as structure will tend to be fixed, with only colour map changing
*/
FUNCTION_BEGIN(FunctionSeparateZ,3,2,false,0)
//! Evaluate function.
virtual const XYZ evaluate(const XYZ& p) const
{
const XYZ v=arg(0)(XYZ(p.x(),p.y(),0.0));
return arg(1)(v+p.z()*XYZ(param(0),param(1),param(2)));
}
FUNCTION_END(FunctionSeparateZ)
//------------------------------------------------------------------------------------------
//! Function repeatedly applying it's leaf function to the argument
FUNCTION_BEGIN(FunctionIterate,0,1,true,FnIterative)
//! Evaluate function.
virtual const XYZ evaluate(const XYZ& p) const
{
XYZ ret(p);
for (uint i=0;i<iterations();i++)
ret=arg(0)(ret);
return ret;
}
FUNCTION_END(FunctionIterate)
//------------------------------------------------------------------------------------------
//! \todo Something like Conway's Game of Life or a reaction-diffusion system, seeded from an initial function.
/*! Probably operate on an iterations()xiterations()xiterations() grid.
Need ability to cache state at a particular time by identity (address-of?) of "our".
WILL cause slow start-up due to precompute, although compute-on-demand should help a bit.
Locking method to check it is valid before compute starts. Read during main evaluation should be lock-free.
*/
/*
FUNCTION_BEGIN(FunctionCellular,0,1,true,FnIterative)
//! Evaluate function.
virtual const XYZ evaluate(const XYZ& p)
{
return XYZ(0.0,0.0,0.0);
}
protected:
};
*/
// Not done yet.
//REGISTER(FunctionCellular);
//------------------------------------------------------------------------------------------
#endif
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