about Lighting and shadow casting

[Jacky_J]

I think it's work now, please try and submit the result here thanks.

http://steelstyle.free.fr/IrrImg/ShadowVolumes01.patch

Hmm, i tried your patch but i'm getting funky results:





In that first pic, the shadows on the right are below the world somewhere.

[Steel Style]

Thank you verry much can you send me a little source + media zip file with your file.

Also this is the same for D3D and OpenGL ?
Zpass or Zfail Method ? or maybe both ?

[Jacky_J]

You can check out the sourcecode here:
http://code.google.com/p/irrlamb/source/checkout

That was opengl with just the default call to addShadowVolumeSceneNode()

zpass works better, until your camera is in the shadow volume. Then everything is reversed (shadows become non shadows, vice versa)

[Steel Style]

For the Z pass the behaviour inside the shadow is a normal limitation of Zpass.

For the Zfail I don't know how I missed this, maybe I did too much Zpass instead of Zfail test. But I looked at the code again I don't really have clue but that can be a error due to far plane clipping.

:/

[m3ltd0wn]

using addShadowVolumeSceneNode();
on animated mesh scene nodes and I have 2 cameras in my scene, irrlicht version 1.6:




is it fixed in the latest svn version?

[Jacky_J]

Nope, hasn't been fixed in the latest svn. I imagine once we get all the bugs sorted out, they'll add it in. I'm just surprised all this time shadow volumes were never implemented correctly in irrlicht.

[m3ltd0wn]

hope they will be repaired in the future, right now i'm not using shadows in my project because it is in the early stages of developement, but in the future i will need dynamic shadows

i'll keep an eye on this thread

[Virion]

you mean camera casts shadow? that sounds funny to me.

[m3ltd0wn]

i have 2 cameras, one is a fps style camera the other one is a custom camera movable by WASD keys, the default active camera is the custom camera, and by pressing F2 key, the active camera is switched to the fps camera then if i press WASD the custom camera moves around and the effect is seen in the second picture
in the first picture the custom camera is active.

i don't know if those circled shadows are from the cameras or not my node hierarchy is: whole_car_node(parent)->vw_node
whole_car_node(parent)->unslidable_node
wheels_node(parent)->front wheels and rear wheels
and vw_node is parent for the 3dmodels (IAnimatedSceneNodes) for different parts of the chassis of the car

vw_node,whole_car_node,unslidable_node and wheels_node are Empty SceneNodes ...

the scale of the model is vector3df(20,20,20), and the center of the model is right there where the strange little shadow is
the position of the whole_car_node is vector3df(0,0,0) and the position of the vw_node is vector3df(0,3,0)

don't know if this helps but the effects are strange indeed

[Jacky_J]

Any updates to this? Maybe we can get some of the Ogre people to help us out.

[hybrid]

Yes, we have a properly working shadow code up to one point. The projection is not correctly working and thus the shadow is moving wrongly. But it might be fixed in 1.8