Wrapping textures around 3D models in Lua.

[Cheez Pirate]

How do you do it? O_o

[alatnet]

That will be implemented in Luaplayer 0.20 Mod 4 by cools and me (well me helping out).
Along with extra useful 3D, Wlan, and Misc functions that enhance luaplayer's capabilities.
Also, the function for c\c++ for wrapping an image around a 3D model is:

/**
  * Set if the texture should repeat or clamp
  *
  * Available modes are:
  *   - GU_REPEAT - The texture repeats after crossing the border
  *   - GU_CLAMP - Texture clamps at the border
  *
  * @param u - Wrap-mode for the U direction
  * @param v - Wrap-mode for the V direction
**/
void sceGuTexWrap(int u, int v);

I do not know wether this just wraps an image to a single pair of triangles (e.g. a square) or the whole model itself.
It may require some experimentation for this to be confirmed.

[Cheez Pirate]

Good luck with it.

[alatnet]

Heh, no prob.
It's just that doing two things at once is the hard part.
Me helping out with Mod 4 while I'm trying to get my MMO game up and running.
PSP connecting to a Java Server sort of works, need to debug the communications cus im having probs with the server responding/sending data.
Then comes the database stuff. And finaly comes the interesting psp2psp communications part.

[BlackShark]

Originally Posted by alatnet

That will be implemented in Luaplayer 0.20 Mod 4 by cools and me (well me helping out).
Along with extra useful 3D, Wlan, and Misc functions that enhance luaplayer's capabilities.
Also, the function for c\c++ for wrapping an image around a 3D model is:

/**
  * Set if the texture should repeat or clamp
  *
  * Available modes are:
  *   - GU_REPEAT - The texture repeats after crossing the border
  *   - GU_CLAMP - Texture clamps at the border
  *
  * @param u - Wrap-mode for the U direction
  * @param v - Wrap-mode for the V direction
**/
void sceGuTexWrap(int u, int v);

I do not know wether this just wraps an image to a single pair of triangles (e.g. a square) or the whole model itself.
It may require some experimentation for this to be confirmed.

cool, good luck with lua player mod 4, you and Cool's

[Cheez Pirate]

Originally Posted by alatnet

Heh, no prob.
It's just that doing two things at once is the hard part.
Me helping out with Mod 4 while I'm trying to get my MMO game up and running.
PSP connecting to a Java Server sort of works, need to debug the communications cus im having probs with the server responding/sending data.
Then comes the database stuff. And finaly comes the interesting psp2psp communications part.

Are you coding your MMO in Lua or C/C++? And is it 3D? O_o

[SG57]

http://wiki.ps2dev.org/psp:lua_player:functions

Gu.start3d() saves the current GE state for the normal 2D operations. Call this function first and then draw your scene. You can use the following functions:

Gu.clearColor, Gu.clearDepth, Gu.clear, Gum.matrixMode, Gum.loadIdentity, Gum.perspective, Gum.translate, Gum.rotateXYZ, Gu.texImage, Gu.texFunc, Gu.texEnvColor, Gu.texFilter, Gu.texScale, Gu.texOffset, Gu.ambientColor, Gu.enable, Gu.disable, Gu.blendFunc, Gu.light, Gu.lightAtt, Gu.lightColor, Gu.lightMode, Gu.lightSpot and Gum.drawArray. See the PSPSDK for documenation about the parameters, for example the pspgu.h. If there is a ScePspFVector3, write 3 numbers instead one parameter (this will be changed in a later version). Whereever a color is expected, use a Color object. For textures use an Image object.

Gum.drawArray is something special: It has just 3 parameters: “prim”, “vtype” and a table. With “prim” you specify which primitive should be used, for example Gu.TRIANGLES. “vtype” specifies the vertex format and the transformation operation. For example “Gu.COLOR_8888|Gu.VERTEX_ 32BITF|Gu.TRANSFORM_3D” means, that your vertices has a color component and a 3 vertex coordinate components and is transformed before passed to the rasterizer. The table is then a list of vertex entries, where each vertex entry has the form (color, x, y, z). If you have specified GU_TEXTURE_32BITF, too, then one entry looks like this: (textureU, textureV, color, x, y, z). The order of the entries is defined in pspgu.h: textureU, textureV, color, normalX, normalY, normalZ, vertexX, vertexY, vertexZ. Indices, weights and multiple vertices per entry (which you’ll need for the morphing feature) currently are not supported.

After drawing anything, call Gu.end3d(), which flushs the display buffer and draws all pending 3D graphics and restores the 2D GE state. Don’t forget to call a screen:clear() before fullscreen 2D operations, because otherwise the z-buffer is not cleared and the blitting functions may not work correctly. If you need to blit 2D images in 3D mode, use textures and triangles.

See the 3D Cube example in the Applications folder of the distribution of Lua Player to see how to use the 3D functions and take a look at the GU example in the PSPSDK how to use all the other functions. Most of the time you can copy and paste the examples and just remove all those C fussinesses like “.0f”, semicolon, malloc etc. :-)

Look at the example that comes with lua player as well. Also, the functions i bolded, you should be able to look at a C source file that uses the GU and maps a texture onto a set of verticies.

[alatnet]

Originally Posted by Cheez Pirate

Are you coding your MMO in Lua or C/C++? And is it 3D? O_o

I'm codeing it in Java (PC Side Server), PHP and MySql (Remote Database on a webhost), and Lua with posible C\C++ to expand Lua functionality (PSP Game).

It's going to use 3D levels or arenas with 2D playable characters (heh 2.5D).
There's also going to be an RPG aspect to it too!

I might need some slight help with the sprites and maybe coding it a bit, but no one may understand the way I code stuff.

I still need to work on the server. After that I going to work on the PHP and MySql databaseing stuff. Finaly I'll work on PSP2PSP connectivity. All while coding the actual game.

I figured out how to handle all of the connections and what not, TCP will be used for server and database communications while UDP will be used for PSP2PSP communications as it seems to be better at handling intensive communications.

This may somehow spawn a PSP P2P program out of it, I dono.

After I deem that everything is complete, I'll release a beta and have updates for it every now and then that will add new features, characters, levels/arenas, skills, and/or items. Which can be downloaded via PC or PSP.

It was originaly going to be called ALMMO (Angelic Layer MMO), but I desided to change the name to Ultimate Battle RPG, though this may not be the permanant name, I'm open to suggestions for a better name.

Originally Posted by SG57

http://wiki.ps2dev.org/psp:lua_player:functions


Look at the example that comes with lua player as well. Also, the functions i bolded, you should be able to look at a C source file that uses the GU and maps a texture onto a set of verticies.

There are some functions in the C\C++ version of the PSP's GU functions that are not implemented in luaplayer.

[blah]

hey man.. ive already modded lua player with that function if you want it?

ive added..

Gu.texScale,Gu.offset,Gu. veiwPort,Gu.scissor,Gum.o rtho,Gum.scale,Gum.lookAt ,Gu.frontFace...

[alatnet]

Why not give some of those functions to cools?

[cools]

I'd be glad to add those functions in! Just pm me the code!