[bzr] Light shines through doors
#39
Quote:Example: If you load up D2 level 1 you'll see that there is a blue glow lighting the floor in front of you. This is a shield powerup hidden in a secret room. If you turn OFF colored lighting, due to the normal level lighting you do only barely notice that there IS some light at all.

I see. That should be really easy to fix, btw. I'm not 100% sure if Descent's geometry considers face normals, but it would be very strange if it did not. If so, to prevent glitches like this, all you would have to do in your dynamic lighting code is to check whether a light is on the front or on the back side of a polygon to decide whether that specific face is going to be lit or not. Is this, apart from the colored lights, code that comes from Parallax?

Maybe they left this check out back in 1995 to gain some speed, but nowadays that shouldn't be a problem at all. Algorithms to check a point against a triangle can be found easily on the internet. For speed reasons it might make sense though to first make a simple test of a triangles vertices against the max radius of the light to completely save the normals test in all obvious cases.
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Messages In This Thread
[bzr] Light shines through doors - by tryone - 05-05-2011, 04:51 PM
RE: Light shines through doors - by Ryusei117 - 05-05-2011, 05:01 PM
RE: Light shines through doors - by tryone - 05-06-2011, 01:24 PM
RE: Light shines through doors - by Ryusei117 - 05-06-2011, 08:57 PM
RE: Light shines through doors - by Hawkins - 05-06-2011, 09:02 PM
RE: Light shines through doors - by Ryusei117 - 05-06-2011, 09:29 PM
RE: Light shines through doors - by Ryusei117 - 05-06-2011, 09:58 PM
RE: [bzr] Light shines through doors - by tryone - 05-07-2011, 10:53 AM
RE: [bzr] Light shines through doors - by tryone - 05-31-2011, 07:04 PM
RE: [bzr] Light shines through doors - by Hawkins - 05-31-2011, 08:11 PM
RE: [bzr] Light shines through doors - by tryone - 06-13-2011, 02:25 PM
RE: [bzr] Light shines through doors - by Hawkins - 06-16-2011, 07:13 AM
RE: [bzr] Light shines through doors - by Hawkins - 06-16-2011, 09:27 PM
RE: [bzr] Light shines through doors - by Descenteer - 06-23-2011, 12:15 PM
RE: [bzr] Light shines through doors - by Hawkins - 06-23-2011, 01:14 PM
RE: [bzr] Light shines through doors - by Hawkins - 06-23-2011, 01:20 PM
RE: [bzr] Light shines through doors - by Hawkins - 06-23-2011, 04:56 PM
Re: [bzr] Light shines through doors - by zico - 07-07-2011, 09:06 AM
Re: [bzr] Light shines through doors - by Hawkins - 07-07-2011, 10:10 AM
Re: [bzr] Light shines through doors - by zico - 07-07-2011, 10:11 AM
Re: [bzr] Light shines through doors - by lloyd - 05-30-2012, 09:48 PM
Re: [bzr] Light shines through doors - by zico - 05-30-2012, 09:58 PM
Re: [bzr] Light shines through doors - by lloyd - 05-30-2012, 11:50 PM
Re: [bzr] Light shines through doors - by zico - 05-31-2012, 08:59 AM
Re: [bzr] Light shines through doors - by lloyd - 05-31-2012, 05:31 PM
Re: [bzr] Light shines through doors - by zico - 05-31-2012, 06:53 PM
Re: [bzr] Light shines through doors - by lloyd - 05-31-2012, 07:22 PM
Re: [bzr] Light shines through doors - by Hawkins - 06-01-2012, 03:02 AM
Re: [bzr] Light shines through doors - by lloyd - 06-02-2012, 01:03 AM
RE: Light shines through doors - by zico - 05-05-2011, 06:06 PM
RE: Light shines through doors - by zico - 05-06-2011, 01:49 PM
RE: Light shines through doors - by zico - 05-06-2011, 09:36 PM
RE: [bzr] Light shines through doors - by zico - 06-01-2011, 02:40 PM
RE: [bzr] Light shines through doors - by Zealot - 06-06-2011, 08:32 PM
RE: [bzr] Light shines through doors - by zico - 06-06-2011, 08:45 PM
RE: [bzr] Light shines through doors - by Zealot - 06-07-2011, 06:00 AM
RE: [bzr] Light shines through doors - by zico - 06-07-2011, 07:52 AM
RE: [bzr] Light shines through doors - by Zealot - 06-07-2011, 09:44 AM
RE: [bzr] Light shines through doors - by zico - 06-07-2011, 09:59 AM
RE: [bzr] Light shines through doors - by zico - 06-16-2011, 06:58 AM
RE: [bzr] Light shines through doors - by zico - 06-16-2011, 07:20 AM
RE: [bzr] Light shines through doors - by zico - 06-23-2011, 10:10 AM
RE: [bzr] Light shines through doors - by zico - 06-23-2011, 10:39 AM
RE: [bzr] Light shines through doors - by zico - 06-23-2011, 11:05 AM
RE: [bzr] Light shines through doors - by zico - 06-23-2011, 12:22 PM
RE: [bzr] Light shines through doors - by zico - 06-23-2011, 12:42 PM
RE: [bzr] Light shines through doors - by zico - 06-23-2011, 01:12 PM
RE: [bzr] Light shines through doors - by zico - 06-23-2011, 01:25 PM
RE: [bzr] Light shines through doors - by zico - 06-23-2011, 01:45 PM
RE: [bzr] Light shines through doors - by zico - 06-23-2011, 02:07 PM
RE: [bzr] Light shines through doors - by zico - 06-23-2011, 02:45 PM
RE: [bzr] Light shines through doors - by zico - 06-23-2011, 04:59 PM
RE: [bzr] Light shines through doors - by zico - 06-23-2011, 06:12 PM

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