New metaballs demo

[Humus]

It's a marching cubes isosurface extracting demo (more in-depth description on how this algorithm works on my website).

Looks like this:

Available at the usual place:
http://www.humus.ca/

 

[BRiT]

at first i read this as "New Meatball Demo"...

keep up the good work!

 

[Pete]

at first i read this as "New Meatball Demo"...

Good, at least I'm not the only one.

I'll give it a whirl once my MB gets back from the shop. Asus had to give its undercarriage a bit of a, "How's your father?"

 

[Simon F]

at first i read this as "New Meatball Demo"...

You graphics heathen

 

[rwolf]

Still waiting for Humasmark

 

[pino]

ouch this thing totally kills my pc. it shutdown it

 

[DarN]

9800 Pro, A64 3800+:

3DNow : 142 fps
SSE : 122 fps
FPU : 76 fps

It's purdy!

 

[MuFu]

Nice CPU benchmark, Humus.

2500+
FPU: 48 meatballs
3DNow: 59 meatballs

2GHz
FPU: 58 meatballs
3DNow: 70 meatballs

2.2GHz
FPU: 61 meatballs
3DNow: 75 meatballs

Athlon XP, 9800 Pro.

I assume SSE mode requires SSE2 support?

 

[Hyp-X]

9800 Pro, AXP 2000+

3DNow : 50 fps
SSE : 45 fps and the balls are invisible
FPU : 41 fps

 

[RejZoR]

AthlonXP 2400+@3400+
Very interesting and nice,3Dnow! works great,but SSE is just black screen (no mountains and metaballs). Bug or something else?

 

[Nebuchadnezzar]

ouch this thing totally kills my pc. it shutdown it

Same here, instant reboot when I opened the exe.

 

[Ostsol]

ouch this thing totally kills my pc. it shutdown it

Same here, instant reboot when I opened the exe.

Might be good for you to post your system specs.

 

[Nebuchadnezzar]

ouch this thing totally kills my pc. it shutdown it

Same here, instant reboot when I opened the exe.

Might be good for you to post your system specs.

Not really..

P4 Northwood 2800C@3430MHz
ASUS P4C800-E Deluxe
1GB ram
245MHz FSB
Gainward 6800GT@399/1120MHz
Using 67.03 drivers

I think it's just a problem with my Windows install.

 

[991060]

The program stalls the system on my K8. :?

 

[Humus]

I assume SSE mode requires SSE2 support?

Apparently it did, but it wasn't supposed to. I apparently didn't check the docs closely enough. The movd instruction apparently always operates on MMX registers on non-SSE2 CPUs, even when the operands are xmm registers. But I've uploaded a fixed version now that uses movss instead.

 

[Humus]

I think it's just a problem with my Windows install.

Perhaps it's the overclock?

 

[Nebuchadnezzar]

I think it's just a problem with my Windows install.

Perhaps it's the overclock?

Nah i'm 100% stable. Just reformatted, it didn't reboot this this time, but it ran for 1 second then it froze, either that or it's running at incredible low FPS

 

[Nick]

Apparently it did, but it wasn't supposed to. I apparently didn't check the docs closely enough. The movd instruction apparently always operates on MMX registers on non-SSE2 CPUs, even when the operands are xmm registers. But I've uploaded a fixed version now that uses movss instead.

movss is the only correct instruction to copy single scalar values from an SSE registers to memory. movd, the SSE2 variant, is actually an '128-bit MMX' instruction for integer operations (Intel can be very confusing when it comes to categorizing instructions).

In practice both are equivalent (on processors with SSE2 support), but for future processor generations peformance might differ because one uses the floating-point pipeline and the other the integer pipeline. It's advised to always use the corresponding instruction.

Anyway, it's interesting to see that your 3DNow! version is slower than the SSE version. Any possibility that your SSE version isn't fully optimized?

 

[Lezmaka]

mmmmmmmmmm, meatballs

 

[Hyp-X]

But I've uploaded a fixed version now that uses movss instead.

Are you sure?
I've re-downloaded the file and it's still the same .zip file.