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cycloid
Forum Regular

Posts: 783
Registered: 09-03

i've been hunting around the net for an explanation of Carmak's reverse. but i just dont get it. what was it about "old" shadow algorithms that caused havok when you were within th shadow? was it coded by a monkey? or was it something to do with a cheat uber fast shadow hack that went wrong? like. someone link me to an explanation cos from what i understand you'd

1. do some clipping by extruding the object from the light source.

2. render all the polys in there darker than the rest

ok so that's a very basic explanation but surely it's not rocket science? (though apparently it did take a rocket scientist to work out, heh)

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cycloid
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08-17-05 15:57 #

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AirRaid
Graphics Zealot

Posts: 2319
Registered: 11-00

Stencil shadows wasn't the hard part of the lighting engine. Getting it all unified (all from in-level light sources, no lightmaps, shadow maps or anything was the difficult part, as I understand it. Or rather, getting it to do that at a reasonable framerate, I should say. I'm fairly sure if zaldron drops by he can explain things properly but I wouldn't count on it.

08-21-05 09:30 #

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Youn
Green Marine

Posts: 42
Registered: 07-04

Yeah, it really pisses me off when I see a shadow "within" another shadow, like you do in alot of current games like HL2... it's just wronge loooking and that's not how the world works.

10-04-05 22:00 #

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Nikanoru
Mini-Member

Posts: 94
Registered: 08-05

Youn said:
Yeah, it really pisses me off when I see a shadow "within" another shadow, like you do in alot of current games like HL2... it's just wronge loooking and that's not how the world works.

You can have a shadow within a shadow in the real world if there are two light sources. Just not if there's only one.

10-04-05 23:43 #

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Youn
Green Marine

Posts: 42
Registered: 07-04

Nikanoru said:

You can have a shadow within a shadow in the real world if there are two light sources. Just not if there's only one.

I'm glad you noticed. You can also cross your eyes and move your index fingers together to form a floating sausage.

10-06-05 00:45 #

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AgentSpork
Agent Spork is a resourceful agent for the Country

Posts: 1722
Registered: 09-02

Youn said:
Yeah, it really pisses me off when I see a shadow "within" another shadow, like you do in alot of current games like HL2... it's just wronge loooking and that's not how the world works.

If something as trivial as that pisses you off, then I would suggest you just quit playing video games. Period.

10-06-05 01:35 #