Orbiting

The Ejs Orbiting Mass on a Table 3D model displays the frictionless dynamics of two masses that are attached via a string through a hole in a horizontal table. Mass m moves on the table in two dimensions while mass M hangs vertically and just moves up and down. The simulation allows displaying...

The Ejs Two Orbiting Masses with Relative Motion model displays the dynamics of two masses orbiting each other subject to Newtonian gravity. The simulation displays the motion of the masses in the inertial reference frame and the relative motion as seen from one of the masses. The initial energy...

The Ejs Orbiting Mass with Spring Force model displays the frictionless dynamics of a mass constrained to orbit on a table due to a spring. The simulation displays the motion of the mass as well as the effective potential energy. The initial velocity, k/m, and the proper or natural length of the...


Platforms: Mac

The Ejs Orbiting Mass with Constant Force model displays the dynamics of an orbiting mass due to a constant force (a linear potential energy function). The simulation displays the motion of the mass as well as the effective potential energy. The initial conditions can be changed by dragging the...


Platforms: Mac

The Flying Dogs Screen Saver shows dogs orbiting round the center of the desktop. They obey gravitational attraction according to physical laws, so their behavior is chaotic and never repeats. There are options to clear the desktop, leave trails, use your own dog images and more.


Platforms: Windows

Do you plot Earth-orbiting trajectories? Would you like to know how your orbit compares to the size of the Earth? If so, EARTH_SPHERE will help get you there.This function is a modification of the built-in MATLAB command SPHERE. Rather than producing a sphere with a radius of 1, the radius of the...


Platforms: Matlab

Polar orbiting remote sensing satellites have an orbital inclination of about 9 degrees to the vertical. Because of this georeferenced satellite scenes are not straight but slanting (rotated). It is generally useful to have a vector containing the boundary of the image. Since an image can...


Platforms: Matlab

The Ejs N-body Orbits model displays the dynamics of three to five identical masses orbiting each other subject to Newtonian gravity. The simulation displays the periodic orbital motion of the masses. The initial configuration of the system can be changed via slider. You can modify this...


Platforms: Mac

The Ejs Quartic Potential Orbit model displays the dynamics of a mass orbiting a much larger mass subject to a quartic potential, C/r4. The simulation displays the motion of the smaller mass and the effective potential energy diagram. The initial energy of the system can be changed via textbox...


Platforms: Mac

The Ejs Non-Newtonian Orbit model displays the dynamics of a mass orbiting a much larger mass subject to non-Newtonian gravity. The simulation displays the motion of the smaller mass and the effective potential energy diagram. The initial energy of the system can be changed via textbox and the...


Platforms: Mac

The Stellar Aberration 3D Model illustrates the phenomenon known as the aberration of starlight, first reported by James Bradley in 1729. Aberration occurs because light has a finite speed, and thus light from a star takes a finite amount of time to travel through the tube of a telescope. During...


Platforms: Mac

The EJS Differential Galactic Rotation Model illustrates the model of galactic rotation proposed by Jan Oort in 1927. In Oort's model most of the mass of the galaxy is concentrated at the center. Stars move in circular orbits around the center, with orbital speeds that are inversely proportional...


Platforms: Mac

The TwinkleGL screen saver sends a shower of twinkling stars across the screen in a variety of attractive patterns. Configuration options are available that can be used to change the screen saver into a chaotic mass of colour, a trio of comets orbiting the middle of the screen, or bizarre...


Platforms: Windows

GPS (Global Positioning System) receivers tell you where you are anywhere on the planet! The Global Positioning System (GPS) is a collection of 24 earth-orbiting satellites and these satellites allow any person who owns a GPS receiver to determine his or her precise longitude, latitude and...


Platforms: ALL

The Hubble Space Telescope is a free screensaver that will delight all fans of the world outside our own. It is a selection of twenty of the best images obtained by the Hubble space telescope.The Hubble space telescope is continuously orbiting around the Earth, and is named after the astronomer...


Platforms: Windows

Qonk project is a game I wrote to learn some SDL basics. The game is a small build-and-conquer strategy game with very simple rules. A complete game only lasts for a few minutes and can be a fun break away from work or whatever youre doing. The setting of the game is a solar system of planets....


Platforms: *nix

Prey tells the story of Tommy, a Cherokee garage mechanic stuck on a reservation going nowhere. His life changes when an otherworldly crisis forces him to awaken spiritual powers from his long-forgotten birthright. Abducted along with his people to a menacing mothership orbiting Earth, he sets...


Platforms: *nix

Mars MOLA Viewer displays a fly-over rendering of the Martian surface, as measured by the Mars Global Surveyor, in real-time 3D animation. Mars MOLA Viewer downloads the Mars Orbiting Laser Altimeter topographic data files and uses them to drive the rendering. The user controls the position and...


Platforms: *nix

Missile of Holiday Cheer is a winter holiday vertically oriented flying finesse game. Missile of Holiday Cheer is a game that revolves around piloting missiles bearing presents from elves workshops up to Santas low-orbiting mothership. There are five elf groups and a number of powerups, and...


Platforms: *nix

Stop the onslaught of many menacing monsters thoughout 50 levels from invading with the galactic rocket ship. You control the quick ship with either the keyboard or joystick and must shoot the horror characters before they reach the ground. Be extremely careful as the ghouls will throw deadly...


Platforms: Windows