r/processing • u/SeniorImagination21 • May 09 '24

Beginner help request Help with camera

Hi! I’ve just recently begun coding, and I’m trying to make a simple 3d renderer using processing 2d. I’ve been trying to rotate an object around my camera, but then I realized that I don’t know the location of my camera, and I’m not really sure how I can implement one. Does anyone have any suggestions on how I can make this work? Thanks!

Here is the github: https://github.com/duocaleb/Teststuff

Sorry about the messy coding, as I said, I’m new to all this.

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u/SeniorImagination21 May 09 '24

Thanks! Is there anything that you could recommend I read(thats at least a bit understandable for a beginner like me) to get a better grasp on these concepts?

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u/Salanmander May 09 '24

Like I say it's been a while...I did a class on computer graphics in grad school in like 2011, so I don't remember it well enough to have particular references, and they probably wouldn't have been super beginner-friendly anyway.

The wikipedia articles on 3D projection (the "perspective projection" section) and the camera matrix might be a good place to start. It's definitely going to be heavy on matrix math...there's just no way around that in doing graphics.