P3D - Sphere translation without deforming?

Processing Coding Questions
1

Hi! Thanks for all the help so far, this platform has been extremely supportive. I’m creating a 3D sphere but everytime i translate it, it also seems to rotate/deform, why is this the case? Is there an easy fix or do I need to recalculate the rotation amount every time to bring it back to the original shape when i translate?

1 Like
2

It seems like perhaps you want an orthographic perspective using ortho() rather than the default perspective() –

https://processing.org/reference/ortho_.html

but it is hard to tell what you mean by “everytime i translate it, it also seems to rotate/deform” without more details and example code.

3

Hi jeremy, this is what i mean:

void draw() {
  background(0);
  pushMatrix();
  translate(width/2, height/2);
  rotateX(0);
  rotateZ(0);

  shape.draw(getGraphics());

  popMatrix();
}

If I change the translation:

  translate(width/2+80, height/2-80);

The sphere/ellipse moves but also rotates, I want it to be exactly as it was.
Original:
pic0
After translation:
pic1

1 Like
4

What are you doing here? Can you provide a working sketch that shows what this is, and why you are doing it? From your title and question text I assumed you were using sphere().

5

Try enabling and disabling ortho() in this example.

void setup() {
  size(400, 400, P3D);
  // ortho();
}
void draw() {
  background(0);
  pushMatrix();
  translate(width/2+80, height/2-80);
  rotateX(0);
  rotateZ(0);
  sphere(100);
  popMatrix();
}
2 Likes
6

Thanks jeremy. Ortho worked like a charm. Appreciate it.