Wolf3D raycast Fisheye bug

Andos · 2002-12-15T10:29:08

Hi there. I have just made a untextured Wolf3D Engine. First i want to say that i already know whats wrong but i need to know how to do correct it. I have the players position saved in ''PlayerDirection'' I have a constant Field Of Vision on 90 degrees. My app roams through the different angles and find the distance so the current vertical line can be drawed correctly with the correct lenth and colour. Works almost fine. You maby allready have guessed that i use a sin cos calculation to loop all the way untill it hits a wall right? And then you maby know this gives me a fisheye effect... I want this to be corrected but - how? I need the rays to be cast at the same "speed" if you understand what i mean. The outer rays have to travel with a bigger speed than the one in the middle. How do i calculate that?

Graphics and GPU Programming Programming

Started by Andos December 05, 2002 01:27 PM

14 comments, last by Andos 21 years, 4 months ago

Andos

124

Author

December 09, 2002 08:29 AM

I can''t view your pictures... Can''t you do them in JPG?
I can''t view or download them...

Emin3m

122

December 09, 2002 09:37 AM

Did you click on the "ide" link?

Andos

124

Author

December 10, 2002 02:12 PM

What ide link?
There''s only text there...
I tried copying it to the webbrowser but it didn''t work...
IE can''t view bitmaps...

Emin3m

122

December 11, 2002 05:55 AM

I''ve uploaded it in jpeg format
"http://www.extra.hu/jocof1/pic1.jpg"

Andos

124

Author

December 14, 2002 07:32 AM

404 site not found.

I can''t acces your server. Even when having all the security set to LOW.

HolyFish

127

December 15, 2002 10:29 AM

Hi Andos,

I''m currently also working on a Wolf3D engine.
First of all you shouldn''t take 90 degrees FOV, take 60 degrees for a better effect...
Second, this is a very good site which helped me a lot :
http://www.permadi.com/tutorial/raycast/

Here, he explains how you can remove the fisheye distortion... http://www.permadi.com/tutorial/raycast/rayc8.html#FINDING%20DISTANCE%20TO%20WALLS

enjoy !!

Wolf3D raycast Fisheye bug

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Wolf3D raycast Fisheye bug

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