Artifacts using two PGraphics with blend DIFFERENCE
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Programming Questions
•
10 months ago
Why this artifacts in upper left corner of the ellipse when they overlap?
EDIT:
it seems to be related to the antialias, if you skip smooth() the artifact is gone...
Copy code
- PGraphics c;
- PGraphics d;
- void setup() {
- size(300, 300);
- background(255);
- c = createGraphics(width, height, JAVA2D);
- d = createGraphics(width, height, JAVA2D);
- c.beginDraw();
- c.smooth();
- c.endDraw();
- d.beginDraw();
- d.smooth();
- d.endDraw();
- }
- void draw() {
- background(255);
- c.beginDraw();
- c.background(0, 0);
- c.fill(255);
- c.stroke(0);
- c.ellipse(mouseX, mouseY, 30, 30);
- c.endDraw();
- d.beginDraw();
- d.background(0, 0);
- d.fill(255);
- d.stroke(0);
- d.ellipse(width/2, height/2, 30, 30);
- d.endDraw();
- d.blend(c, 0, 0, width, height, 0, 0, width, height, DIFFERENCE);
- image(d, 0, 0);
- }
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