Figure Asymptote opacity -- 004

Posted on 2011-01-01 Edited on 2025-06-30 In EN , Tech , Programming , Asymptote , Examples 2D , Opacity

An Asymptote code and the generated picture opacity--004.

🔗This picture comes from the Asymptote gallery of topic opacity

Figure opacity 004 Generated with Asymptote

Show opacity/fig0040.asy on Github.
Generated with Asymptote 3.00-0.
Categories : Examples 2D | Opacity
Tags : #Opacity

// The result does not support image conversion.
// You can view it in the file /home/pi/code/pi/asymptote/asymptote-exemples-builder/build/asy/opacity/fig0040.pdf.

import edvenn_pi;

// Screen: Multiplies the complements of the backdrop and source color
// values, then complements the result:
// The result color is always at least as light as either of the two constituent
// colors. Screening any color with white produces white; screening
// with black leaves the original color unchanged. The effect is
// similar to projecting multiple photographic slides simultaneously
// onto a single screen.
string blend="Screen";

size(10cm,0);

path [] edvenn= EdVenn(4);
pen [] fillp= new pen[]{black, red, green, blue};
pen p=linewidth(1mm);

for (int i=0; i<4; ++i) {
  fillp[i]=fillp[i]+opacity(.5,blend=blend);
  filldraw(edvenn[i], fillpen=fillp[i], drawpen=linewidth((i+1)*mm/2));
 }

shipout(bbox(2mm,invisible),"pdf");