G Earthquaker is a physics based simulation designed to shake or quake the screen. The image is attached by a spring to a randomly vibrating point. By varying the parameters of the spring, it is possible to simulate the chaos of an earthquake or make your beautiful footage look like a wobbly handheld home movie. There are two modes: the shake mode just shakes the screen, but this can cause the edges of the screen to become visible; quake mode compensates for this by scaling the screen as it moves, producing some lovely distortions.
To help work with the effect, the diagnostics mode shows the randomly vibrating point and the centre of the image as coloured dots.
Control
Settings
Notes
Mode
Quake
Shake
Selects wether Shake or Quake mode is to be used.
Amount
0 to 100
The overall amount of the effect - keyframe this parameter to bring the effect in or out.
Strength
1 to 10
The strength of the randomly vibrating point that drives the spring simulation system, not unlike the Richter scale.
Mass
0.5 to 10
The mass of the screen - increasing mass will slow the movement of the screen, but also give it greater inertia.
Spring
0 to 1
The spring constant of the simulation - increasing the spring constant will make the spring stronger and springier - decreasing it will make the spring looser and pull less on the screen.
Length
0 to 10
This is the "natural length" of the spring. This can be increased to allow the screen to move around further.
Friction
0 to 1
Friction acts like a viscous force that retards the motion of the screen. A friction of zero will send the screen in to chaos as there will be nothing stopping the spring stretching and the screen moving. Increasing the friction will dampen the movement.
Show diagnostics
on
off
This turns on the coloured dots that show the randomly vibrating dot (green), and the centre point of the screen (red).
