PS2PSXe - cleaning the house

[ODedinho]

Very Good I hope this project will not be long to be finalized.

[doctorxyz]

How some simple color swapping can create any 3D effect (with glasses or not)? I just don't see any connection... Especially that the GPU at geometry rendering time has no information at all regarding depth of any primitive (they're rendered as flat, all have the same z value. The depth is lost during calculations on gte).

That's correct.
START OF OFF-TOPIC
The only known way to get 3D effect on a PS2 Console is using a proper eyeFX 3D Adapter with shutter glasses (http://www.berezin.com/3d/playstation.htm) together with few compliant games (http://www.berezin.com/3d/compatable_games.htm).
END OF OFF-TOPIC
BR,

[yoshi314]

i feel like this is going way off topic.

i mean, the basic working emulator is not yet finished (nor available), and people are already starting to talk about some random features.

c'mon...

[nicevibe]

i feel like this is going way off topic.

i mean, the basic working emulator is not yet finished (nor available), and people are already starting to talk about some random features.

c'mon...

Ridiculous ideas aside, isn't this the best time (while development is ongoing) to talk about random features and inspire creative thought toward the project? In my experience, feedback, no matter how absurd, has always helped spark new ideas. Especially when you're dealing with some form of writers block.

[steescribbles]

Is it possible to implicate resources from the PC version of ePSXe into this project, such as graphics drivers, sound drivers, bios, etc.?

It probably seems impossible, but its just a thought.

apologies if this was already mentioned.

[dlanor]

Is it possible to implicate resources from the PC version of ePSXe into this project, such as graphics drivers, sound drivers,

That is definitely not possible, as any existing drivers worth having from ePSXe are hand optimized in PC-specific code, which has no chance of running at all on a PS2.

What we need is corresponding hand-optimized MIPS code for the PS2, and that is the sort of work ffgriever is doing.

bios, etc.?

It is my understanding that ffgriever has already made a homebrew PS1 bios with functionality matching that of original bioses, without copying any copyrighted code and instead reimplementing all functions so as to work on PS2 hardware in PS2 mode. Thus no external bios files are needed. But the program also has a "-bios=" launch argument option, allowing for external bios files supplied by the user.

At least that is how it worked with the older version of PS2PSXe that I beta-tested, though I guess a lot may have changed since then, with the new version and its hard-GPU implementation.

Best regards: dlanor

[Sload02]

Please, stop, because I'm starting to feel guilty :P.

I played recently some old psx games on my psx... Then played the same games a little bit on ps2 (just comparing some differences in behavior on these two with the emu). God, the dithering in psx games on ps2 (original unmodified psx emu on ps2) is soooooooo ugly. Can't stand it. It's waaaay better on real psx (no bilinear filtering though).

do you mean that ps1 games look actually worse when played on ps2? i've never heard of that, always thought that there is no difference... could you expain this please further?

[dlsmd]

do you mean that ps1 games look actually worse when played on ps2? i've never heard of that, always thought that there is no difference... could you expain this please further?

yes some like FFVII do, look worse

tho some do look better but it is hit and miss

[kevstah2004]

It's not a problem for mdecs, as it's just some colors being swapped most likely at ycbcr->rgb24/rgb16 conversion. For the texutes it would require some additional work.

The question is... How some simple color swapping can create any 3D effect (with glasses or not)? I just don't see any connection... Especially that the GPU at geometry rendering time has no information at all regarding depth of any primitive (they're rendered as flat, all have the same z value. The depth is lost during calculations on gte).

I wasn't talking about the newer techniques like colorcode3d, real3d, imax I meant a old steroscopic effect where it has one color for either eye
red / blue, green / red or blue / red where it copies the complete screen and then offsets it to the left as a second image.

[dlanor]

I wasn't talking about the newer techniques like colorcode3d, real3d, imax I meant a old steroscopic effect where it has one color for either eye
red / blue, green / red or blue / red where it copies the complete screen and then offsets it to the left as a second image.

That principle is well known and has been used for '3D movies' for over a century (early implementations date back to the 1890's), but while the principle does work the result is really quite horribly bad, and the method of using color filtering eyeglasses in itself restricts its effective use to monochrome material. (Originally acceptable as color photography did not exist when this method was first invented.)

But regardless of all technical details, any display method dependent on a specific form of input data (like this stereoscopic screen data) is only useful if that is the form of input available.

So which existing PS1 games make use of that method, rendering a 3D display for such color-filtered viewing ?

I never heard of any myself...

Surely you were not suggesting that the emulator itself in addition to its normal work would also have time left over for analyzing and calculating how to project ingame 3D model data onto two simultaneous color-filtered planes, mixed into one and used to replace the original 2D display ???

Having the emulator try to do this in addition to its basic emulation is simply absurd, and has no chance of working...

Best regards: dlanor