---------------------------------------------------------

To start Java Applets -click on the image

---------------------------------------------------------

Comparing Weaver  with  NomadS might reveal a tension between works which are conceptually interesting and works which are visually interesting.

Hopefully, Quad is somewhere in the middle of this aesthetic dichotomy..

As an exception, this work is not based on the practical implementation of the basic parametrical space system, which (on various levels) is fundamental to the other early works (although this principle is still operative on a conceptual level).

On one conceptual level, the work is based on a visual interpretation/implementation of a voltage controlled oscillator -a fundamental piece of equipment found in the analogue studio at the Institute for Sonology (then in Utrecht), where the artist studied when a young man.

Basically, a VCO produces a sine-wave -which varies in frequency according to the voltage level fed into it. however, the basic amplitude oscillates (in the theoretical model) between +1 and -1 which allows it to be easily mapped into a dimension of any size (as happens when one draws a circle -where the basic sine/cosine functions are mapped to a specific radius).

Any changing variable has a minimum and a maximum value -so one can easily link three oscillators together in a single group -such that each oscillator has its minimum and maximum values determined by the other two.

A rectangle can be constructed from any two points -each with an x and a y coordinate -thus a total of 4 parameters is required. So it requires a bit of 'fiddling" to create a group of oscillators which control the movements of the two points that define a rectangle (this is something that requires further working out within the context of the applet). However, once this is established (more or less) -one can use the colour value found at the location of the point to control the relevant group of oscillators (if one interprets the colour in terms of red, green, blue components  this maps easily to three oscillators -but one could include the transparency -in which case one would have four control parameters available).

Once a rectangle has been defined -it can be redefined as a diamond shape -by bisecting the sides and connecting the points......

......Or one can interpret the original four parameters (which determine the locations of the corners of the rectangle) in completely different ways -as defining the radius, rotation and central  x,y position of a variable square, for example -or even as determining the radius, rotation and location of two connected lines.

Later, when sound is added, it will be interesting to see how the oscillator system used for the sound will relate to the one used for the image.

---------------------------------------------------------

To start Java Applets -click on the image