{

mplot::Visual v(1600, 1000, "BoolVisuals to show boolean state");

v.lightingEffects();

// A BoolVisual is a little indicator model to show a value.

auto bv = std::make_unique<mplot::BoolVisual<>> (sm::vec<float>{-1, 0, 0});

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

bv->width = 0.3;

bv->tcol = mplot::colour::limegreen;

bv->fcol = mplot::colour::grey20;

bv->lbl = "20 > 10?";

bv->value = (20 > 10 ? true : false);

bv->finalize();

v.addVisualModel (bv);

bv = std::make_unique<mplot::BoolVisual<>> (sm::vec<float>{0, 0, 0});

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

bv->width = 0.3;

bv->tcol = mplot::colour::limegreen;

bv->fcol = mplot::colour::grey20;

bv->lbl = "20 < 10?";

bv->value = (20 < 10 ? true : false);

bv->finalize();

v.addVisualModel (bv);

// You can change the value and re-display with:

//

// auto bvp = v.addVisualModel (bv);

// bvp->value = false;

// bvp->reinitColours();

// ...then later:

// bvp->value = true;

// bvp->reinitColours();

v.keepOpen();