Subversion Repositories DIN Is Noise

/*
* superformula.cc
* DIN Is Noise is copyright (c) 2006-2020 Jagannathan Sampath
* For more information, please visit http://dinisnoise.org/
*/


#include "superformula.h"
#include "vector2d.h"
#include "ui_list.h"
#include <vector>
using namespace std;

extern ui_list uis;

extern const float PI_BY_180;
extern const int MILLION;

superformula::superformula () {
  name = "Superformula";
  center_x = 0.5;
  center_y = 0;
  load_params ();
}

superformula::~superformula () {
  widget_save ("d_superformula", ctrls);
  save_params ();
}

void superformula::load_params () {
  ifstream f (make_fname().c_str(), ios::in);
  string ignore;
  f >> ignore >> m >> ignore >> n1 >> ignore >> n2 >> ignore >> n3 >> ignore >> num_points;
}

void superformula::save_params () {
  ofstream f (make_fname().c_str(), ios::out);
  string ignore;
  f << "m " << m << endl << "n1 " << n1 << endl << "n2 " << n2 << endl << "n3 " << n3 << endl << "num_points " << num_points << endl;
}

void superformula::setup () {

  plugin::setup ();

  widget* _ctrls [] = {&sp_m, &sp_n1, &sp_n2, &sp_n3, &sp_num_points};
  for (int i = 0; i < 5; ++i) ctrls.push_back (_ctrls[i]);
  num_ctrls = ctrls.size ();

  spinner<float>* spn [] = {&sp_m, &sp_n1, &sp_n2, &sp_n3};
  const char* lbl [] = {"m", "n1", "n2", "n3"};
  float val [] = {m, n1, n2, n3};
  for (int i = 0; i < 4; ++i) {
    spinner<float>* spi = spn[i];
    spi->set_text (lbl[i]);
    spi->set_limits (0.01f, MILLION);
    spi->set_delta (0.01f);
    spi->set_value (val[i]);
    spi->set_listener (this);
  }

  sp_num_points.set_text ("Points");
  sp_num_points.set_limits (0, MILLION);
  sp_num_points.set_delta (8);
  sp_num_points.set_value (num_points);
  sp_num_points.set_listener (this);

  widget_load ("d_superformula", ctrls);

  render ();

  //for (int i = 0; i < num_ctrls; ++i) ctrls[i]->set_moveable (1);

}

void superformula::render () {

  num_points = sp_num_points.f_value;
  if (num_points == 0) return;

  m = sp_m.f_value;
  n1 = sp_n1.f_value;
  n2 = sp_n2.f_value;
  n3 = sp_n3.f_value;


  theta = 0;
  dtheta = 360.0 / num_points;

  int j = num_points + 1;
  points.resize (j);
  float x, y;
  for (int i = 0; i < j; ++i) {
    float rtheta = theta * PI_BY_180;
    float mtheta = m * rtheta / 4.;
    float t1 = pow (fabs(cos (mtheta)), n2);
    float t2 = pow (fabs(sin (mtheta)), n3);
    float r = pow (t1 + t2, 1.0f / n1);
    if (r == 0) {
      x = center_x;
      y = center_y;
    } else {
      r = 1. / r;
      x = center_x + r * cos (rtheta);
      y = center_y + r * sin (rtheta);
    }
    point<float>& pi = points[i];
    pi.x = x;
    pi.y = y;
    theta += dtheta;
  }

  ss.str("");
  ss << "superformula_" << m << '_' << n1 << '_' << n2 << '_' << n3;

  gen_pts ();

}