coding UTF-8;

// Required to handle 3D graphs
import tool.Graph3D;


// Write sample coordinate data to file (WRITE_TSV means tab-separated format)
int file = open("sample3d.txt", WRITE_TSV);
for(int yi=0; yi<=10; yi++){
	for(int xi=0; xi<=10; xi++){
		float x = xi * 0.4 - 2.0; // from -2.0 to 2.0
		float y = yi * 0.4 - 2.0; // from -2.0 to 2.0
		float z = y*y - x*x;
		writeln(file, x, y, z); // Write "x y z" to a line
	}
	writeln(file, ""); // Insert a blank line to separate rows
}
close(file);


// Launch the 3D graph
int graph = newGraph3D();

// Plot the file on the 3D graph
setGraph3DFile(graph, "sample3d.txt");

// Set plot options
setGraph3DOption(graph, "WITH_POINTS", false);   // Disable point plot
setGraph3DOption(graph, "WITH_MESHES", true);    // Enable mesh plot
setGraph3DOption(graph, "WITH_MEMBRANES", true); // Enable surface plot