Carnot, cycle yes
Some time ago I made a simulation of Adiabatic and Isothermal changes in GeoGebra but it was a bit clumsy when attempting to model a Carnot cycle. Take 2: the new improved simulation of the Carnot cycle.
This time I have used the equations of the transformations to draw lines that are only visible between the points where they intersect. The isothermal transformation scan be changed by varying the temperatures and the adiabatic ones by varying the constant in the adiabatic transform equation PV5/3 = constant.