3D rendering

[spynaz]

Hi,

I've been trying to figure out how to draw a 3D object on a 2D screen and I just can't get it. I looked over some LOVE examples but I still can't figure out anything. How do I draw a 3D object using LOVE? Can someone please explain?

[iPoisonxL]

It's not simple. It is, Love2D. Requires lots of maths and stuff. Just thought I'd let you know. If you're really experienced in that kind of stuff, then I'm sorry, I'm no help.

[spynaz]

It's not simple. It is, Love2D. Requires lots of maths and stuff. Just thought I'd let you know. If you're really experienced in that kind of stuff, then I'm sorry, I'm no help.

I know it's not simple, but I still want to do it.

[bekey]

-snip-

[jjmafiae]

you probably wanna use unity3d or sauce engine instead....

[micha]

How do I draw a 3D object using LOVE? Can someone please explain?

The difficult part is the perpective projection. That is the transformation that transforms a 3d-point coordinates (x,y,z) to a 2d coordiante (on screen).
If, for a start, you assume the viewer is in the origin (0,0,0) and your screen is in the x-y-plane at z=1 then the transform is:

Code: Select all

function transform (wx,wy,wz)
  return wx/wz, wy/wz
end

Once you have the coordinates of points, you can use these to draw triangles or lines.

[spynaz]

How do I draw a 3D object using LOVE? Can someone please explain?

The difficult part is the perpective projection. That is the transformation that transforms a 3d-point coordinates (x,y,z) to a 2d coordiante (on screen).
If, for a start, you assume the viewer is in the origin (0,0,0) and your screen is in the x-y-plane at z=1 then the transform is:

Code: Select all

function transform (wx,wy,wz)
  return wx/wz, wy/wz
end

Once you have the coordinates of points, you can use these to draw triangles or lines.

So that's the transform? Ok, but what about quaternions and stuff? I want to be able to rotate and move around too.

[micha]

My advice is to start with the simple approach and a fixed camera position. If that works, go on and implement rotation and movement. Unfortunately, I cannot help you any further, as I haven't tried it on my own. But I am pretty sure, you will find some tutorial with google.

[spynaz]

My advice is to start with the simple approach and a fixed camera position. If that works, go on and implement rotation and movement. Unfortunately, I cannot help you any further, as I haven't tried it on my own. But I am pretty sure, you will find some tutorial with google.

I can't find any tutorials. Do you know any good ones?

[jjmafiae]

you could also... use a... 3D engine?