{

// Contructor args are width, height, title

mplot::Visual v(1600, 1000, "mplot::CartGridVisual");

// You can set a field of view (in degrees)

v.fov = 15;

// Make this larger to "scroll in and out of the image" faster

v.scenetrans_stepsize = 0.5;

// The coord arrows can be displayed within the scene (rather than in, say, the corner). Set true to do so.

v.coordArrowsInScene (false);

// You can set the background (white, black, or any other colour)

v.backgroundWhite();

// You can switch on the "lighting shader" which puts diffuse light into the scene

v.lightingEffects();

// Add some text labels to the scene

v.addLabel ("This is a\nmplot::CartGridVisual\nobject", {0.26f, -0.16f, 0.0f});

// Create a HexGrid to show in the scene

sm::cartgrid cg(0.01, 0.01, 1, 1);

std::cout << "Number of pixels in grid:" << cg.num() << std::endl;

// *NB* This call (or any other 'set boundary' call) is essential, as it sets up the

// d_ vectors in the cartgrid. Without it, the cartgrid will be unusable!

cg.setBoundaryOnOuterEdge();

// Make some dummy data (a sine wave) to make an interesting surface

std::vector<float> data(cg.num(), 0.0);

for (unsigned int ri=0; ri<cg.num(); ++ri) {

//std::cout << cg.d_x.size() << std::endl;

//std::cout << "cg.d_x["<<ri<<"]=" << cg.d_x[ri] << std::endl;

data[ri] = 0.05f + 0.05f*std::sin(20.0f*cg.d_x[ri]) * std::sin(10.0f*cg.d_y[ri]) ; // Range 0->1

}

// Add a CartGridVisual to display the CartGrid within the mplot::Visual scene

sm::vec<float, 3> offset = { 0.0f, -0.05f, 0.0f };

auto cgv = std::make_unique<mplot::CartGridVisual<float>>(&cg, offset);

v.bindmodel (cgv);

cgv->cartVisMode = mplot::CartVisMode::RectInterp;

cgv->setScalarData (&data);

cgv->cm.setType (mplot::ColourMapType::Twilight);

cgv->finalize();

v.addVisualModel (cgv);

v.keepOpen();

return 0;