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Has anyone experienced this before? As shown in the screen shot below, the screen is rendered 2 times at 1/4 size. The display mode used was set to 8888 and it seemed like the screen was rendered as it was 4444 or other 16bit pixel format. The weird thing about it was that the problem seemed to be q...

Introduction JGE++ (Jas Game Engine++) is a hardware accelerated 2D game SDK for PSP. It supports cross-platform development under MS Windows. The entire game development process, including coding, debugging and testing, can be done in Windows. (However, it's still recommended to test your game on ...

Wow! This is really nice! Excellent work!

Your hack does not do what you think it does. libmikmod does not "somehow" mix the two channels together -- you simply set the playback sample rate to twice the speed of the original sample: si->speed = wh.nSamplesPerSec*wh.nChannels; // @_@: changed from (/) to &a...

libmikmod (or mikmodlib) is pretty good but it only supports mono PCM (Wav) files at the moment. You'll get a NULL pointer if trying to load a Wav file with 2 channels. Here is a small hack to make it load and play 2-channel Wav files. Technically speaking, this is not REAL stereo because, libmikmod...

Thanks bada! I have zero knowledge on making my own "makefile". May I include yours in the next release?

Dr Watson, while investigating large memory leaks in my own code (good liberal use of 'delete's when should be using 'delete[]'s), I found one in the JGE library. Your windows implementation of JGE::FreeTexture doesn't actually call delete on the texture pointer. It deletes the underlying pixel dat...

[edit] Ignore me, that's not the problem, just stepped through again and noticed that JLBFont::SetColor calls JQuad::SetColor. The actual problem was simply that the when in debug mode it couldn't find the Res folder, because its executing from a different directory than the bin directory. Nothing ...

In which sense. sceGumRotateX/Y/Z ? Could also just manualy rotate your verticies (only 2) yourself. The benifit is you're only sending 2 verts though the pipeline vs 4. I've tried rotating vertices manually with GU_SPRITES but it didn't work. It makes sense if you think about it as by manually rot...

Hi Alain, By "draw from tiles to memory", do you mean you have a large image in memory for the background, you blit all tiles to that image to construct the background and then render that large image to screen? If you are to use GU functions to render that large image, the size of it need...

hi alain91, you can have a look of the Mario demo. It features parallax scrolling. The very front layer is a tile map while the other layers are just big images. I reckon OSLib has more features but JGE++ offers M$ Windows' support, which makes it easier for the development ;) However, from Brunni's...

A new bug-fixed version of SkyAnimator is available for download and the URL is at the original post.

Yo, just simple question. Why use GU_TRIANGLE_STRIP to render sprites? You can just use GU_SPRITES insted. You just need to suply the upper left & lower right verticies to form a quad. yes, you can use GU_SPRITES... but you can't rotate with it ;) The problem was only on demo program Can you tr...

Thank you for all the good words! Here are some prebuilt binaries of the included demos for people to check out the features of JGE++: JGE++ Demo for PSP firmware 1.50 JGE++ Demo for Windows SkyAnimator Demo for PSP firmware 1.50 SkyAnimator Demo for Windows Mario Demo for PSP firmware 1.50 Mario De...

Is it Windows build or PSP build?

For PSP, there's a "res" folder in the "bin" folder of each project. Did you put that on PSP together with your EBOOT?

SkyAnimator English version is available now:

SkyAnimator (English version)

It was written for PSP while I was making StarBugz. Since I borrowed lots of ideas from HGE, I knew I would make a kind of HGE wrapper to make JGE++ games run on Windows as well. It's really painful to debug programs on PSP directly. I made the Mario Demo almost entirely in M$ Windows. Occasionally ...

Hello World for JGE++ The JGE++ package comes with a demo application called Demo. This is basically a Hello World program for JGE++. When programming 2D games, in order to show an image on screen, the image is loaded and then a "DrawImage" function is used to do the job. Sometimes a few ...

An introduction to rendering 2D images with GU JGE++ uses the GU functions for rendering and this is an introduction on how the 2D rendering is done with this 3D library. PSP has 2MB video RAM. Apart from using as frame buffers, user textures can also be stored here for faster GPU process. The pixe...

Introduction JGE++ (Jas Game Engine++) is a hardware accelerated 2D game engine for PSP (using GU) and Windows. It's inspired by the popular game engine HGE on MS Windows. In fact the Windows' counterpart is basically a wrapper of HGE. For more information about HGE, please visit its web site at: h...

Most of the time when I got crashes like that was due to NULL pointers.

You put your homebrew apps/games on memory stick and then run them with the GTA loader. It has nothing to do with UMD/ISO games. You don't have to worry about it at all.

Very nice graphics!

I'm busy with another project at the moment, otherwise I'd really like to join the party ;)

Another option is to checkout devkitPSP:
http://www.devkitpro.org/

Get devkitProUpdater and it will download and install the latest devkitPSP for you. It's not the latest PSPSDK but good enough, and the most important thing is, it's relatively small!

Have you tried libmad? Is your decoding engine offers faster performance than the regular MP3 one?

Just spotted this in your code: sceGuDrawArray(GU_SPRITES, GU_TEXTURE_16BIT | GU_VERTEX_16BIT | GU_TRANSFORM_2D, 2, 0, vertices); What's in your Vertex structure? There seems to be no "COLOUR". Mine looks like this: struct Vertex { float u, v; u32 color; float x, y...

Very nice indeed! Very impressive parallax scrolling.

I'm still stuck at the 1st level boss and the boss is really nice! Was it a 3D model?

Didn't see much (or no?) alpha blending (explosion etc...) in the game. Was it done on purpose?

Keep up the good works! Looking forward to the final version!

If you want to use a single "transparent color", Paint Shop Pro will change your image to 256 color mode, that's very true. BUT, if you want to do alpha blending, that is, different levels of transparency, say 50% transparent, 80% transparent, you'll use "Export". From my underst...

David: if you're using Paint Shop Pro, to create a PNG with alpha channels, use the "Export->PNG Optimizer" and then change the options in "Transparency". I'm using PNG and having alpha blending effects in my game, check out the source code here: http://forums.ps2dev.org/viewtopi...

I was trying to just give you an idea on how to do double buffering so I only posted a code segment :) Here is the complete source code: http://www.khors.com/JGE/game04_src.zip (You'll need libpng to build it) If you want to use Gu instead, you can have a look of the source code of my game StarBugz:...