Comments for Catalin's XNA Experiments

Comment on Directional Lights by Camus

Camus — Fri, 20 Aug 2010 07:16:20 +0000

Just a little issue, and I know that is only a demo, but, you are using new on this:

new Vector3(0, -1, 0),

That lines are in the render loop, each frame the memory increases linearly, maybe 12Bytes, but thinking on 60fps about a minute, you’ll have 43200Bytes, taken in account that there are 3 news (each for vector) is about 127Kbytes more per minute.

Well is nothing to worry about if is only a demo

Comment on Point Lights by 62316e

62316e — Mon, 16 Aug 2010 18:10:35 +0000

There is my problem with point light.
http://img829.imageshack.us/img829/6086/pointlight.png

Directional light is disabled.

Comment on Point Lights by 62316e

62316e — Mon, 16 Aug 2010 16:34:55 +0000

My point light is rendered as Half Sphere. What i did wrong?

Comment on My technique for the shader-based dynamic 2D shadows by MikeCann.co.uk » Blog Archive » Shader Based 2D Shadowing

MikeCann.co.uk » Blog Archive » Shader Based 2D Shadowing — Sun, 15 Aug 2010 11:11:05 +0000

[...] Catalin’s approach to the problem is far more elegant that my brute force iterative approach. He uses a clever technique of distorting the desired casting image about the light in such a way as not to require iterative pixel lookups. [...]

Comment on Shader-Based Dynamic 2D smooth shadows by Pnikosis

Pnikosis — Thu, 05 Aug 2010 16:24:56 +0000

I’m having a really hard time trying to conert it to 3.1 too. Does anyone have a hint or an idea?

Comment on Dynamic 2D Shadows 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 [...]

Comment on My technique for the shader-based dynamic 2D shadows by calsmurf2904

calsmurf2904 — Tue, 27 Jul 2010 17:16:47 +0000

Hello Catalin,

I’m trying to port your sample over to directx in C++.
One problem I keep getting is that the lightarea rendertarget shows that the whole scene is rendered correctly to it (in black&white ofcourse), but the Distance rendertarget from the ShadowmapResolver remains white.

My shadowmapresolver code can be found here:
http://pastebin.com/T536XiZb

The lightarea code is here:
http://pastebin.com/c8wyMBAH

I use your original shaders.

I hope you can help me, I used your previous sample for my game before you released this tutorial and I was very satisfied. The only problem was that it was really cpu-expensive.

Comment on Crash Course in HLSL by Devrunner

Devrunner — Tue, 27 Jul 2010 09:50:24 +0000

You’re the best.

Comment on Shader-Based Dynamic 2D smooth shadows by yodaime

yodaime — Sun, 25 Jul 2010 13:41:11 +0000

Hello Catalin !

Which version of XNA framework did you used ? I think it’s version 4.

Is it possible to convert this project into 3.1 version ? I tried but some method have seriously changed between 3.1 and 4 (like RenderTarget2D)

Comment on Directional Lights by Catalin Zima

Catalin Zima — Fri, 23 Jul 2010 06:30:08 +0000

I wanted to keep it SM2 compatible.