• To start, pick a simulation from the drop-down list below and click ‘+’ button on the right.
• You can add new particles by opening a drop-down menu below. You can input position and velocity of new particles as column vectors. Alternatively, you can define position and velocity clicking on the canvas. First click defines the initial position of the particle. Second click defines the velocity vector relative to the position of first click. To add a new particle to simulation, click on the “add” button or press Shift + B.
• You can move camera around simulation with WASD keys. To zoom in, press O, to zoom out press I. You can pause / continue or close simulation using a set of buttons on the right.
• If you want to stop simulation when a particle’s position or velocity reaches specific value by x or y, you can add an Event. For example, if you want to know when a particle hits the ground, put a Position Event with value 0 for y (x can be left blank). If you want to know coordinates of the highest point on the trajectory, put a Velocity Event with value 0 for y. You can also stop simulation in a set amount of time using Time Event.
• You can change current simulation time using a slider at the bottom or inputting specific value in the box. The reset button will return time and camera position to their initial state.