[SOLVED] Texture3D invalid argument exception

1

Hi guys.

I’m new in this community and I’m starting to approach Monogame.

My first test was to render a 3D volume, loaded from a .raw file.
My idea is to create a 3D texture, the next steps are not important in order to explain you my current problem.

I immediately had problems with an exception when texture was created.

Here’s a bit of code:

public void InitializeVolume(GraphicsDevice d, BasicEffect effect)
{
    // Exception in the next line "HRESULT: [0x80070057], Module: [General], ApiCode: [E_INVALIDARG/Invalid Arguments], Message: Incorrect parameter.
    _volume = new Microsoft.Xna.Framework.Graphics.Texture3D(Game1.Instance.GraphicsDevice, _width, _height, _depth, false, SurfaceFormat.Single);
            
    _volume.SetData(_scalars);  // Scalars are an array of normalized float( [0 -> 1])

    effect.Parameters["Volume"].SetValue(_volume);
 }

There is some problem with the parameters? Why?
Do you have any idea?
Do not be afraid to answer, so I can continue with my study. :sweat_smile:
Thanks very much!

EDIT The problem was that the depth was not divisible by 4.:joy::sweat_smile:
@Alkher Thanks the same, if you have other tips are welcome.

2

I’m not sure Texture3D can be used with a BasicEffect. One important thing is… there is no “Volume” parameter on a BasicEffect… So SetValue will fail.
I would say, you should use the Effect class.
But to render a volume you should create vertices instead. How will you rotate it ? It would be expensive to always sample the texture, moreover when it is using high sizes. (By the way what size are you using ?)

3

Thanks for the answer.
Ok, I’ll use the Effect class.
My goal is to render volumes of 512x512x512 pixels, or even 1024x1024x1024.
The plan was to create a 3D texture and apply it to a cube, and then rotate the cube.
Do you think I should do it in another way?
Any advice is well accepted.

4

TextureCube would then be better for that (a cube with 6 faces)
Texture3D is 3D, i mean: with a volume of 512x512x512, you not only have the 6 faces, but also the interior can be sampled. Maybe it is what you want, but I’ve never used this, rarely seen it in use in a game too

5

Yes, that’s exactly what I’m looking for. Next, I will apply a “transfer function” to change the aspect of the volume.
In any case thank you for the advice.