Traditional raytracing you fire a ray from say the first pixel 0,0 in your image, follow it bouncing around the model and get the color that way. When you hit a diffuse surface, that one ray becomes lots of rays.
Photon mapping you fire lots of rays from the lights, and see where they hit. Then you write down the color, illumance, and direction the ray hit in some 3D memory array. Then you can do standard raytracing but use the photon map to get the colors..
Photon mapping lets you do soft shadows, and has the advantage that you don't have to split one ray into many rays when you hit a diffuse surface. This is why it is called photon mapping - you pretend it's a single packet. When it has a choice where to go (diffuse surfase) then you just pick a direction randomly.
When I code, I usually code in vi, then ":wq" to save and quit. Then run gcc and just look at the line number of the inevitable compile bug:) then go back into vi, jump to the line, and then look for the error.
And don't get me started on those damn hippies that are always complaining the environment and fuel consumption. My suv is a tool to get work done, not a religion.
"And here I demonstrate the difference in heat disipation efficency between a gazalle and a human." *BANG**BANG* "Okay, I've shot it with a rifle from 200 years. You can see i've taken it's head clear off, showing that.. uh.. I'm a good shot."
"Best-selling" can correctly be applied to "author".
Consider if instead it said "famous", or "english" or something:
The wheel-chair bound author of "A.."
And besides, other's have pointed out that the "best-selling" does indeed apply to the author, not the book. (Meaning the author has other best-selling books - not that that particular book was best-selling)
At some point in your life you have to piss off people who can damage your life. Whether it's your boss, the government, your parents, or your teacher.
To pick a stupid analogy, oooh, let's say what if ghandi worried that it would be a bad idea to piss off the english military.
Wired says: The best-selling author of "A Brief History of Time"
I didn't know hawking sold so well;-)
Anyway, to be on topic - can someone give more technical information on this? Many of us probably have a fairly high understanding of maths and physics, and want more details...
I just finished my computer science degree, and have started a physics PHD. So I wanted to get up to speed on physics, and so downloaded an illegal copy of the Feynman lectures.
I fell in love with the lectures immediately, and wanted to buy them. I went to the university bookstore - they wanted around £40 for each lecture. That's like £800 ($1400 or something) at least. That's what I get for attempting to be honest and pay for them - screw that. The guy isn't even alive.
Just to follow up:
mach 10 = 3,402.9 meters / second (from google)
The time dilation would be proportional to sqrt(v^2/c^2) which is sqrt(1 - 1.15*10^7 / 9*10^16) sqrt(1-10^-10) which is sqrt(0.9999999999) or near enough, which is uh 0.999999999999999999999 or so I think.
that's not much of a time dilation.
You probably want to dig out a calculator and check these calculations, but it's close enough.
What are you on about? His reputation, in this case, is allowing him to speak at conferences without prior peer review. Speak. That's it. It's not like it's going to be accepted as the 'currently known correct view' without peer review. It's just a talk.
Also I've bought doom and quake several times over by now. I keep losing the cd's, or want to install it on lots of machines, or want to install it elsewhere etc.
"I'm not so sure that "tired of life" and "tired in the needing sleep sense" are mutually exclusive."
I think you mean "are not connected" or correlated or something. I doubt anyone believes that tired of life and sleepy are mutually exclusive - i.e. you be in both states at once.
I'm not tiptoeing around, worrying about offending people. I'd just turn up on the spot and ask. If you can't say no when you want to, then that's your problem.
Slashdot Mirror
Traditional raytracing you fire a ray from say the first pixel 0,0 in your image, follow it bouncing around the model and get the color that way. When you hit a diffuse surface, that one ray becomes lots of rays.
Photon mapping you fire lots of rays from the lights, and see where they hit. Then you write down the color, illumance, and direction the ray hit in some 3D memory array. Then you can do standard raytracing but use the photon map to get the colors..
Photon mapping lets you do soft shadows, and has the advantage that you don't have to split one ray into many rays when you hit a diffuse surface. This is why it is called photon mapping - you pretend it's a single packet. When it has a choice where to go (diffuse surfase) then you just pick a direction randomly.
Yeah I remember that too - I remember rusty complaining about it.
;) /me mutters about dumb ass patents.
For those who "reverse memory mapping" sounds complicated, and should be able to be patented, it goes a little something like this:
You have your memory address (0-4GB or whatever) which can include files, and IO.. right?
You also have the actual memory address on the actual memory chips.. right?
Now a memory map maps from your virtual memory address, to your physical memory address.
Now you get 10 points for guessing what a reverse memory map is.
Or putting text and graphics on the screen at the same time. (Does IBM still have that patent?)
exactly, who wants a sysadmin that can't even get doom3 to install properly.
When I code, I usually code in vi, then ":wq" to save and quit. Then run gcc and just look at the line number of the inevitable compile bug :) then go back into vi, jump to the line, and then look for the error.
I hardly ever actually read the problem in gcc.
And don't get me started on those damn hippies that are always complaining the environment and fuel consumption. My suv is a tool to get work done, not a religion.
"And here I demonstrate the difference in heat disipation efficency between a gazalle and a human." .. uh.. I'm a good shot."
*BANG**BANG*
"Okay, I've shot it with a rifle from 200 years. You can see i've taken it's head clear off, showing that
"Best-selling" can correctly be applied to "author".
.."
Consider if instead it said "famous", or "english" or something:
The wheel-chair bound author of "A
And besides, other's have pointed out that the "best-selling" does indeed apply to the author, not the book. (Meaning the author has other best-selling books - not that that particular book was best-selling)
At some point in your life you have to piss off people who can damage your life. Whether it's your boss, the government, your parents, or your teacher.
To pick a stupid analogy, oooh, let's say what if ghandi worried that it would be a bad idea to piss off the english military.
Well I'm glad one person got what I said... even if it wasn't that funny.
Oh well.
when you rebel, you are going to piss some people off.
Wired says: The best-selling author of "A Brief History of Time"
;-)
I didn't know hawking sold so well
Anyway, to be on topic - can someone give more technical information on this? Many of us probably have a fairly high understanding of maths and physics, and want more details...
I just finished my computer science degree, and have started a physics PHD. So I wanted to get up to speed on physics, and so downloaded an illegal copy of the Feynman lectures.
I fell in love with the lectures immediately, and wanted to buy them. I went to the university bookstore - they wanted around £40 for each lecture. That's like £800 ($1400 or something) at least. That's what I get for attempting to be honest and pay for them - screw that. The guy isn't even alive.
I once had a company write a check out to "John Flux". They were shocked that I worked there a month and didn't know that wasn't my real name heh.
btw, the extra x is because I have "JohnFlux" on slashdot, but forgot the password.. not that anyone cares.
couldn't care less. If they could care less, then that means they do care.
Just to follow up:
mach 10 = 3,402.9 meters / second
(from google)
The time dilation would be proportional to sqrt(v^2/c^2) which is sqrt(1 - 1.15*10^7 / 9*10^16) sqrt(1-10^-10) which is sqrt(0.9999999999) or near enough, which is uh 0.999999999999999999999 or so I think.
that's not much of a time dilation.
You probably want to dig out a calculator and check these calculations, but it's close enough.
dude, what time dilation. We're talking about mach 10. Do you realise how slow that is?
What are you on about? His reputation, in this case, is allowing him to speak at conferences without prior peer review. Speak. That's it.
It's not like it's going to be accepted as the 'currently known correct view' without peer review. It's just a talk.
That doesn't mean it can't just starting changing random numbers slowly in a spreadsheet etc.
That would be incrediably damaging.
Duke nukem is open source, but doesn't have any free graphics. Is anyone working on this?
I've always taken "arguably" to mean that you can put up a reasonable argument for it.
Also I've bought doom and quake several times over by now. I keep losing the cd's, or want to install it on lots of machines, or want to install it elsewhere etc.
To know how to replace the computers, you're doing a survey. But to do the survey, you're surveying slashdot. But you needed a computer to do that.
"I'm not so sure that "tired of life" and "tired in the needing sleep sense" are mutually exclusive."
I think you mean "are not connected" or correlated or something. I doubt anyone believes that tired of life and sleepy are mutually exclusive - i.e. you be in both states at once.
I hate tactfulness. With a passion.
I'm not tiptoeing around, worrying about offending people. I'd just turn up on the spot and ask. If you can't say no when you want to, then that's your problem.