Gravity Nu Visualize gravitational force effects between N objects.
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Gravity Nu Description

Software package for visualization of gravitational force effects between N objects. In order to predict/calculate object data (position and velocity) in future or past time (within limits of calculation) one need object mass, initial position and initial velocity vector at some initial moment of time. Data is calculated and displayed in SI units (second, meter, kg, meter/second etc.). Position data is defined in (x,y,z) components and velocity data is defined in (x,y,z) vector components in Cartesian coordinate system. There is no limitation in parameters - object will behave just like they behave in the real world, within variables, calculation and display limitations. Project and object data can be defined via software interface (Project and Impulse Editor) . TO START THE QUICK EVALUATION : 1. Start GRAVITY Nu 2. CLICK on OPEN PROJECT BUTTON 3. Select START BUTTON from MAIN DIALOG TO NAVIGATE IN 3D WINDOW : ZOOM (CHANGE VIEWER DISTANCE FROM THE SELECTED OBJECT) rotate mouse WHEEL ROTATE AROUND THE SELECTED OBJECT press and hold WHEEL (third) mouse button while moving mouse There are three ways of objects position graphical interpretation : 1. Line from origin (x=0,y=0,z=0) to selected object, in blue colour 2. Trail consisting of the last 100 position points in yellow colour .Duration of trail (object position history) is 100/FPS seconds of computer time (NOT object time). 3. Textured sphere representing objects, with selected texture image NOTES: -data numbers are formatted in scientific notation (example : 1.123456123456E12) with 12 digit precision after decimal separator and variable type is FLOAT (EXT) with range of : +/- 4.19e-307 to 1.79e308 -sphere radius is calculated from object mass and density -once PROCESS button is selected calculation will run until t=STOP TIME (from TIME DIALOG)) -if STOP TIME is less then current time then the process will run backwards in time collision checking can be ON or OFF - if it is OFF then object are treated as point mass -about precision and accuracy : as an example (test we performed), accuracy of earth position in 4 years forward calculation with dt=1 (s) is +-50 000 m (or +-50 km) - compared with JPL Horizons (NASA) ephemeris data; PC processing time was about 30 minutes

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