SCREEN

SCREEN

SCREEN inverts both colours, multiplies them, then inverts the result. The outcome is always lighter than either input — which is what makes SCREEN the opposite of ATISA.

Measured: (100, 150, 200) over (200, 100, 50) gives (222, 191, 211) — 255 − (55 × 155 ÷ 255) = 221.6, and so on.

The name stays English. The Setswana word for screen is sekerini, and it means a computer display — not the thing happening here. Using SEKERINI would teach a real word for the wrong idea, and Bopa’s rule is to name for what actually happens.

Examples

Beams over a dark sky

Rerun ↻Open in editor ↗

tiro setaLoeto() {
  thalaKanefase(400, 220);
  bokamorago(20, 24, 46);
  tlogelaMothalo();
  seeloSaMotswako(SCREEN);

  tlatsaMmala(120, 60, 60);
  thalaSelee(150, 110, 220, 140);
  tlatsaMmala(60, 90, 120);
  thalaSelee(250, 110, 220, 140);

  seeloSaMotswako(MOTSWAKO);
  tlhalosa('Dilee tse pedi tse di lefifi mo bokamoragong jo bontsho; fa di kopana karolo e nna e bonesegile go feta tsona tsotlhe tse pedi.');
}

See also

seeloSaMotswako, ATISA, LESEDI