{

int rtn = -1;

mplot::Visual v(1024, 768, "Visualization");

v.zNear = 0.001f;

v.coordArrowsInScene (true);

// For a white background:

v.backgroundWhite();

// Switch on a mix of diffuse/ambient lighting

v.lightingEffects(true);

try {

sm::vec<float, 3> offset = { 0.0f, 0.0f, 0.0f };

sm::vec<float, 3> c1 = { 0.0f, 0.0f, 0.0f };

sm::vec<float, 3> c2 = { 0.25f, 0.0f, 0.0f };

sm::vec<float, 3> c3 = { 0.0f, 0.3f, 0.0f };

sm::vec<float, 3> colour1 = { 1.0f, 0.0f, 0.0f };

auto tv = std::make_unique<mplot::TriangleVisual<>> (offset, c1, c2, c3, colour1);

tv->set_parent (v.get_id());

tv->finalize();

v.addVisualModel (tv);

v.keepOpen();

} catch (const std::exception& e) {

std::cerr << "Caught exception: " << e.what() << std::endl;

rtn = -1;

}

return rtn;