Line Style

This is an example of using the Style class for a Line

Output

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

using namespace trase;

int main() {

  // create figure and axis
  auto fig = figure();
  auto ax = fig->axis();

  // create x and y vectors
  const int n = 100;
  std::vector<float> x(n);
  std::vector<float> y(n);
  const float k = 1.f;
  auto logistic = [k](const float x) { return 1.f / (1.f + std::exp(-k * x)); };
  for (int i = 0; i < n; ++i) {
    x[i] = -6.f + 12.f * static_cast<float>(i) / n;
    y[i] = logistic(x[i]);
  }

  // create a trase dataset and then plot it using a line geometry
  auto data = create_data().x(x).y(y);
  auto plt = ax->line(data);

  // set line color = red and line width = 10
  plt->style().color(RGBA(255, 0, 0)).line_width(10);

  // label axis
  ax->xlabel("x");
  ax->ylabel("y");

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