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3D Basics.... (Read 678 times)
SmeeZee
3D Basics....
Dec 2nd, 2008, 10:35pm  
Hi there

I am quite new to working with 3D so I was wondering if anyone has a tutorial I could follow?

I am looking to do a animation based around boxes on a grid. Each section of the grid contains a box and that box is either X pixels high, or Y pixels low.

So I am looking to understand how to draw up the grid and then arrange the boxes side by side but being able to  differ their height.

I have done this in 2D, but am completely confused by 3D. I have also tried to follow a Java 3D tutorial on the web, but I failed at the first hurdle as I can't get the relevant libraries installed. Sad

I did try the box example on this site, but I am struggling controlling its size and position.

Any help / advise would be appreciated. Just to say again, I am new to the world of 3D so have struggled with what is on this website.
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Scott Murray
Re: 3D Basics....
Reply #1 - Dec 3rd, 2008, 11:33pm  
Don't even look at the Java 3D tutorials at this stage -- that will just confuse you.

Start by taking a simple 2D sketch with circles, square, whatever, and start adding z translations.  So maybe instead of a circle that follows your mouse in 2D:

ellipse(mouseX, mouseY, 10, 10);

...draw a circle that moves closer/further away in response to mouse movement:

pushMatrix();
translate(100, 100, mouseX);
ellipse(0, 0, 10, 10);
popMatrix();

See how translate(), which is usually used with just two arguments (x, y) can take a third (x, y, z).  Use that to place your objects in space.
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