Drag&drop vertices/triangles, close vertices glue together
Drag vertices without gluing with SHIFT+click+move
Delete/create triangles with double click
Create grid with SHIFT+dblclick
Glue vertices (assign same label) with CTRL+click
Change vertex name or split glued vertices with ALT+click
Press 1/2/3 buttons for different visual modes



Created by: A.Khlevniuk; V.Tymchyshyn, PhD

Symbol	Name	\(H_0\)	\(H_1\)	\(H_2\)
\(S^2\)	Sphere	\(\mathbb{Z}^1\)	\(\{0\}\)	\(\mathbb{Z}^1\)
\(P^2\)	Projective plane	\(\mathbb{Z}^1\)	\(\mathbb{Z}_2\)	\(\{0\}\)
\(K^2\)	Klein bottle	\(\mathbb{Z}^1\)	\(\mathbb{Z}^1\oplus\mathbb{Z}_2\)	\(\{0\}\)
	\(g\)-holed torus	\(\mathbb{Z}^1\)	\(\mathbb{Z}^{2g}\)	\(\mathbb{Z}^1\)
	2-Manifold with \(g\) holes and \(c > 0\) cross-caps	\(\mathbb{Z}^1\)	\(\mathbb{Z}^{2g+c-1}\oplus\mathbb{Z}_2\)	\(\{0\}\)