General Issues with OBJ loading / Rendering

[0x8080]

• Attempting to load non-existent OBJ results in LPP crashing
• Buggy Rendering on some Textures
• Won't render OBJ sub-meshes (individual parts have to be exported into a separate mesh)

[Rinnegatamante]

OBJ loading code is totally messed up, i recognize this.
Be sure to properly use Blender to create compatible OBJ files as of now that can be read by lpp-vita. (How to adapt a model here: http://wololo.net/talk/viewtopic.php?p=419144)

[0x8080]

Its only an issue when you point to a non existing OBJ, then the whole program will crash (no console output).

[0x8080]

On another note, only 1 mesh in a model will render so all models with multiple meshes have to be split which becomes very tedious over time.

Also, is it possible for you to implement support for binding meshes to a skeleton / joint? This would make animations a lot easier than using key-frame animations.

[Rinnegatamante]

I have plans to just switch to vitaGL once ready with all the benefits it will gives (custom shaders, lights, fogging, more supported primitives, etc).

I don't plan to make upgrades to the current Render module until this switch will be performed.

[0x8080]

Can't wait to see that!

However how much overhead does using LPP create compared to just using C++ in an ideal senario?

[Rinnegatamante]

Didn't run proper tests but it probably strongly depends on the kind of code being run.

[0x8080]

Bugged:

Correct:

Textures are buggy too.

Correct versions are rendered in Blender

[Rinnegatamante]

Have you followed the instructions i provided in the link above to generate the model?

[0x8080]

Yes

[0x8080]

I've made sure all the models I exported only used Tris and that there is no materials.

Separating a model is tedious but at least it works.

The textures load fine (top right corner) but are rendered incorrectly, I'll and see if I can fix it.

[0x8080]

I've managed to get images to display behind a model but I get horrible flickering.

Any solution?

`while true do

Graphics.initBlend()
Screen.clear(black)

drawScaledImage(menu[menuName].Image.Background, 0, 0, 960, 544)

Graphics.termBlend()

Graphics.initBlend()

renderMenu(menuName)
navMenu() -- Includes some 3D stuff

Graphics.termBlend()
Screen.flip()

end`

[Rinnegatamante]

You must not do two Blend instances for 3D and 2D. Same blend instance should be used for both 2D and 3D elements.

[0x8080]

Noted. Is there a proper way for me to render 3D models on top of 2D images?

[Rinnegatamante]

2d images are always rendered with z = 0.5f so you should set your models accordingly.

[0x8080]

Ah. I'll just see if I can branch LPP and make is so that I can change the Z axis.

[0x8080]

Never-mind, rescaling the models for now is easier

[Rinnegatamante]

It's not really related to lpp. It's related to vita2d.
When lpp-vita will switch to vitaGL, we will be able to manage this aspect too.

[0x8080]

ah, thanks.

Also, when LPP get's VitaGL will there be fixes for OBJs?

[0x8080]

These UV maps are expecting that the texture is "repeated infinitely" (like PUs in Super Mario 64) so LPP is mapping a wrong part of the texture to the UV that's "out of bounds"?

[0x8080]

Confirmed issue