Programming wiki2:cpp:libraries:openframeworks
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2026-05-13T10:22:19+0000Programming
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https://wikiprogramming.alfredgg.dev/lib/tpl/dokuwiki/images/favicon.icotext/html2020-05-09T09:25:10+0000Anonymous (anonymous@undisclosed.example.com)Creating graphics in OpenFrameworks
https://wikiprogramming.alfredgg.dev/doku.php?id=wiki2:cpp:libraries:openframeworks:creating_graphics&rev=1589016310&do=diff
Creating graphics in OpenFrameworks
Traditional way and primitives
This is the traditional way to draw:
ofFill();
ofSetColor(255,0,0);
ofBeginShape();
ofVertex(20,20);
ofVertex(40,20);
ofVertex(40,40);
ofVertex(20,40);
ofEndShape(true);
However we have several functions to drawtext/html2020-05-09T09:25:10+0000Anonymous (anonymous@undisclosed.example.com)OpenFrameworks Snippets
https://wikiprogramming.alfredgg.dev/doku.php?id=wiki2:cpp:libraries:openframeworks:snippets&rev=1589016310&do=diff
OpenFrameworks Snippets
* Create image from code (color picker)
float w = ofGetWidth();
float h = ofGetHeight();
float cx = w/2;
float cy = h/2;
img.allocate(w,h,OF_IMAGE_COLOR);
for (float y=0; y<h; y++) {
for (float x=0; x<w; x++) {
float angle = atan2(y-cy,x-cy)+PI;
float dist = ofDist(x,y,cx,cy);
float hue = angle/TWO_PI*255;
float sat = ofMap(dist,0,w/4,0,255,true);
float bri = ofMap(dist,w/4,w/2,255,0,true);
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