src/libprojectM/MilkdropPresetFactory/PerPointEqn.cpp

/**
 * projectM -- Milkdrop-esque visualisation SDK
 * Copyright (C)2003-2004 projectM Team
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 * See 'LICENSE.txt' included within this release
 *
 */
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#include <cassert>
#include "fatal.h"
#include "Common.hpp"

#include "CustomWave.hpp"
#include "Eval.hpp"
#include "Expr.hpp"
#include "Param.hpp"
#include "PerPixelEqn.hpp"
#include "PerPointEqn.hpp"
#include <map>
#include <iostream>
#include "wipemalloc.h"


/* Evaluates a per point equation for the current custom wave given by interface_wave ptr */
void
PerPointEqn::evaluate(int i)
{
  float   * param_matrix;
  GenExpr * eqn_ptr;

  //  samples = CustomWave::interface_wave->samples;

  eqn_ptr = gen_expr;

  if (param->matrix == NULL)
  {
    assert(param->matrix_flag == false);
    (*(float*)param->engine_val) = eqn_ptr->eval_gen_expr(i,-1);

    return;
  }
  else
  {
    param_matrix = (float*)param->matrix;

    // -1 is because per points only use one dimension
    param_matrix[i] = eqn_ptr->eval_gen_expr(i, -1);


    /* Now that this parameter has been referenced with a per
    point equation, we let the evaluator know by setting
    this flag */

    if (!param->matrix_flag)
      param->matrix_flag = true;
  }
}

PerPointEqn::PerPointEqn(int _index, Param * _param, GenExpr * _gen_expr, int _samples)
  : index(_index),
    samples(_samples),
    param(_param),
    gen_expr(_gen_expr)
{}


PerPointEqn::~PerPointEqn()
{
  delete gen_expr;
}