Comments on: Dynamic 2D Shadows

By: Chris Harris - cDub

Chris Harris - cDub — Tue, 15 Feb 2011 07:12:40 +0000

Hello!

I’ve created an extremely fast (full hd ready, 100+ lights) vertex-based 2D lighting engine, optimised for both PC and the Xbox 360, running on the XNA 4.0 framework. If anyone is interested in a ready-to-use, opensource 2D engine, rather than implementing your own solution, you can check out http://Krypton.codeplex.com/

Props to OrangyTang and Catalin!

By: Pedro

Pedro — Sat, 20 Nov 2010 21:59:16 +0000

Hey!! This sample is very nice!!!
I still trying to understand it! but I am a beginner in XNA!
Unfortunately I am trying to port it to the 4.0 version, withou success… Any tips???

Thank you!

By: Jeff On Games » Posted Without (Too Much) Comment

Jeff On Games » Posted Without (Too Much) Comment — Fri, 30 Jul 2010 01:35:43 +0000

[...] post about how I got 2D soft shadows working in XNA using the GameDev article in combination with Catalin's implementation and Christian's implementation in D. However, trying to write the post, I wasn't sure if I could [...]

By: FlySoft

FlySoft — Wed, 14 Jul 2010 12:58:18 +0000

Wow, thats real awsome! You also can use this for tile Based games (32×32 tiles, 800×600), and it’s still very fast!

Thank you very much!
FlySoft

By: John Hampson

John Hampson — Fri, 11 Jun 2010 16:06:23 +0000

Hi Catalin,

Awesome sample and thanks for sharing. I’m going to take a look at it and try to incorperate it into one of my mini 2d projects.

-John

By: Christopher Harris

Christopher Harris — Mon, 26 Apr 2010 07:53:58 +0000

Is anyone interested in a GPU based shadowing method?

By: Stan

Stan — Tue, 20 Apr 2010 09:14:57 +0000

I’m trying to get this to work with a camera and all is well except that the shadows will only draw correctly if the convex hull position is at (0,0). Any suggestions? Thanks.

By: Blind « AwkwardGames – Quote: "AwkwardGames ftw!"

Blind « AwkwardGames – Quote: "AwkwardGames ftw!" — Sun, 21 Mar 2010 22:11:01 +0000

[...] and XNA 3.1. The sfx used can be found on FreeSound.org Thanks go to Catalin Zima for his 2D dynamic lighting sample. Inspiration source: Experimental Gameplay Project. The game itself is under the Creative Commons [...]

By: Pnikosis

Pnikosis — Thu, 25 Feb 2010 16:23:46 +0000

Sorry, me again

What I want to do is only draw the cached “cutted” static lights (by cutted, I mean, the light source and removing the parts that are shadowed), as the shadows are already in the dynamic shadows’ RenderTarget2D.

By: Pnikosis

Pnikosis — Thu, 25 Feb 2010 16:14:57 +0000

Hi Catalin, I’m stuck with something and I though maybe you can help me out (please). I’m using your dynamic 2D shadows code (can I mention you in the credits in the game by the way?), and everything’s working fine. I’ve made some optimizations and it’s looking quite good.

But now I’m trying to add some static shadows to my game, and for that I’m trying to calculate all the static shadows during the level loading period, and then just draw a texture with the static lights and shadows. The problem is that I’m not very good at graphics programming, and although I’m storing all the precalculated shadows in a big texture (with RenderTarget2D.GetTexture()) my problem is when my camera scrolls. RenderTarget2D gives me a texture with the viewport’s size, so when I move around and the camera moves, the rectangle containing the shadows stays in place :S What I need (I guess) is a bigger RenderTarget2D, with the size of the whole level, but I don’t know how to do this (gives me error when I try this. Any ideas?

With dynamic shadows I have no problem, as it calculates on each frame the lights and shadows position related to the camera position.

Thanks, sorry for the huge question.