Animated Points Geometry

This is an example for the points geometry

Output

#include "trase.hpp"
#include <fstream>
#include <random>

using namespace trase;

int main() {

  auto fig = figure();
  auto ax = fig->axis();
  const int n = 100;
  std::vector<float> x(n), y(n), r(n), c(n);
  std::default_random_engine gen;
  std::normal_distribution<float> normal(0, 1);
  std::generate(x.begin(), x.end(), [&]() { return normal(gen); });
  std::generate(y.begin(), y.end(), [&]() { return normal(gen); });
  std::generate(r.begin(), r.end(), [&]() { return normal(gen); });
  std::generate(c.begin(), c.end(), [&]() { return normal(gen); });

  auto data = create_data().x(x).y(y).size(r).color(c);

  auto points = ax->points(data);
  points->set_label("points");

  float time = 0.0;

  auto do_plot = [&]() {
    time += 0.3f;
    std::normal_distribution<float> normal(0, 1);
    std::generate(x.begin(), x.end(), [&]() { return normal(gen); });
    std::generate(y.begin(), y.end(), [&]() { return normal(gen); });
    std::generate(r.begin(), r.end(), [&]() { return normal(gen); });
    std::generate(c.begin(), c.end(), [&]() { return normal(gen); });
    auto data = create_data().x(x).y(y).size(r).color(c);
    points->add_frame(data, time);
  };

  for (int i = 0; i < 5; ++i) {
    do_plot();
  }

  ax->xlabel("x");
  ax->ylabel("y");
  ax->title("points test");
  ax->legend();

// output to chosen backend
#ifdef TRASE_EXAMPLES_SVG_BACKEND
  std::ofstream out;
  out.open("example_animated_points.svg");
  BackendSVG backend(out);
  fig->draw(backend);
  out.close();
#endif
#ifdef TRASE_EXAMPLES_GL_BACKEND
  BackendGL backend;
  fig->show(backend);
#endif
}