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Oby1Chick · Joined: 13 Feb 2010 Posts: 24

Hey guys,

Well, I have understood how the LTE game engine works looking at the examples and I am making my own 3D homebrew.
I've tried to render on the screen all the models I've conceived for my race game (They are in .x Direct3D format and the textures are 512x512 JPG) but I got a black screen...
When I come back to XMB and connect my PSP to PC, a file named log.txt has appeared at the root of the memory stick.Inside, there is written :

roby65 · Joined: 01 Jun 2008 Posts: 55 Location: Mid Italy

Are you loading too many textures?!
How many textures do you load?

justin · Joined: 17 Oct 2007 Posts: 16

I've seen this when you try to load an empty image (0 width, 0 height) - it fails generating the mipmaps if __pspgl_teximg_new with a crash.

Oby1Chick · Joined: 13 Feb 2010 Posts: 24

Thanks for helping me guys.
I've fixed my problem with freeze and no log.txt, it was because one of my textures was a not 128x128, 256x256 or 512x512.
But when I load all my models and the skybox it still does not work... and I don't think I load so many textures..I've put all the textures I use in a folder its size is less than 1MB (It is 956 kb).
I will try to resize a few pictures from 512x512 to 256x256 and I will tell you if it works.If it does not work, I will try to see if I can tell to the LTE Game Engine to load my textures in the RAM instead in the VRAM.
Thanks again !

iceman755 · Joined: 21 Jul 2008 Posts: 34

Remember that JPG is a compressed format, but in RAM the textures will be uncompressed, so the less than 1 MB it's just that good for disk space, in RAM they will be bigger, it depends on pixel count and bpp. So a 24 bpp 512x512 texture will be something like 768 KB in RAM no matter what size it has in the disk.
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roby65 · Joined: 01 Jun 2008 Posts: 55 Location: Mid Italy

Try to use only 1 model, then 2, then 3 etc.

Pihas · Joined: 25 Oct 2008 Posts: 60 Location: Lithuania

Try to add bolded line to your makefile

sg57 · Joined: 14 Oct 2005 Posts: 154

Pihas - that is for Slim's only to utilize the 64 mb of RAM they have compared to 32 on the phats, don't use that flag unless you are making a slim exclusive executable (like an HTML Browser or soemthing).

As for this problem - the model loading is a bit picky and special to each format. Obj doesn't have to have any materials since they aren't supported. 3DS has to have atleast 1 material and the texture names are only 12 characters max including extension. 3DS and OBJ do not save normals for lighting.

DirectX also has to have atleast 1 Material AND the material must have a texture name attached, even if you dont intend to have it textured (give it some weird name, it 'll just fail to load no biggie). My terrain will be textured by me in-game so it doesn't need a texture but it wasn't loading so I gave it some bogus texture file name and now its working.

I recommend loading node by node through the code if you think your models are fine with the above.

Easiest node to get displaying is the skybox - make sure the material Clipping flag is set to true since the Skybox will be culled.

Oby1Chick · Joined: 13 Feb 2010 Posts: 24

Thanks a lot folks !
I can't do that Pihas, I want my homebrew to be compatible with fat psps too - I have one myself.
Thank you for helping me in this thread too SG57, I have fixed this problem though.I resized my skyboxes pictures smaller and I was able to render all my models together, this issue is solved !
I only use DirectX models with one texture per object, there are no so big triangles lol, and the camera works well so far