processing / processing/processing4
Regression in 4.4.3: get() and set() are reading and writing from/to the wrong coordinates.
Offen
@tychedelia arbeitet bereits daran.
Seit 29.7.2025.
bug
good first issue
help wanted
- Vorherrschende Sprache
- Java
- Sterne
- 494
- Forks
- 183
- Ø Merge
- 4 Std. 39 Min.
- Gemergte PRs (30 T.)
- 3
Beschreibung
Most appropriate sub-area of Processing 4?
Core/Environment/Rendering
Processing version
4.4.3
Operating system
MacOS 11.7.10
Steps to reproduce this
- Run the attached script to demonstrate the behavior.
In v4.4.2, the color that get() reads is white, as expected. And set() draws around (350, 350) as expected. But in v4.4.3 (and v4.4.4) get() reads blue, and set() draws around (175, 175).
It appears that both get() and set() are operating on (x/2. y/2) instead of (x,y).
snippet
////////////////////////////////////////////////////////////////////////////////////////////////////////////// //<>// //<>// //<>// //<>//
// Define colors
color white = color(255);
color black = color(0);
color red = color(255, 0, 0);
color blue = color(0, 0, 255);
//////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Setup
void setup() {
size(400, 400);
background(white);
noLoop();
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Draw
void draw() {
stroke(blue);
fill(blue);
rect(165, 165, 20, 20);
// BUG 1: The color c is blue but it should be white.
// It seems to be reading from (x/2, y/2) = (175, 175) instead of (350, 350).
color c = get(350, 350);
showColor(c); // R/G/B = 0.0 0.0 255.0 = blue
// BUG 2: This draws around (175, 175). It should draw around (350, 350).
for (int x = 340; x < 360; x++) {
for (int y = 340; y < 360; y++) {
set(x, y, red);
}
}
//save("screenshot.xxx.png");
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////
// Show information about a color
void showColor(color c) {
print("R/G/B =", red(c), green(c), blue(c) );
if (c == white) {
println(" = white");
} else if (c == blue) {
println(" = blue");
} else {
println("");
}
}
//////////////////////////////////////////////////////////////////////////////////////////////////////////////
Additional context
No response
Would you like to work on the issue?
No
Beitragsleitfaden
Erste Schritte
- Lies das ganze Issue und danach den Beitragsleitfaden des Projekts.
- Schreib ins Issue, dass du es übernimmst — das erspart doppelte Arbeit.
- Forke das Repository und arbeite in einem Branch.
- Öffne einen Pull Request, der die Issue-Nummer nennt.
Bewertung
Dieses Issue wurde noch nicht bewertet.